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TALAT Lecture 5103: Corrosion Control of Aluminium - Forms of Corrosion and Prevention

Description

This lecture helps to understand the corrosion principles and to select protection methods; it explains how to use aluminium optimally even in aggressive environments. Some knowledge in aluminium metallurgy and general electrochemistry is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | surface treatment | corrosion | acid solutions | neutral solutions | passivation | localized corrosion | environmentally influenced corrosion | pitting corrosion | crevice corrosion | filiform corrosion | biological corrosion | metallurgically influenced corrosion | galvanic corrosion | intergranular corrosion | mechanically assisted degradation | erosion | fretting corrosion | corrosion fatigue | environmentally induced cracking | stress corrosion cracking | scc | hydrogen embrittlement | corrosion prevention | temper selection | alloy selection | organic coating | inhibitors | anorganic surface treatments | cathodic protection | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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TALAT Lecture 5103: Corrosion Control of Aluminium - Forms of Corrosion and Prevention

Description

This lecture helps to understand the corrosion principles and to select protection methods; it explains how to use aluminium optimally even in aggressive environments. Some knowledge in aluminium metallurgy and general electrochemistry is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | surface treatment | corrosion | acid solutions | neutral solutions | passivation | localized corrosion | environmentally influenced corrosion | pitting corrosion | crevice corrosion | filiform corrosion | biological corrosion | metallurgically influenced corrosion | galvanic corrosion | intergranular corrosion | mechanically assisted degradation | erosion | fretting corrosion | corrosion fatigue | environmentally induced cracking | stress corrosion cracking | SCC | hydrogen embrittlement | corrosion prevention | temper selection | alloy selection | organic coating | inhibitors | anorganic surface treatments | cathodic protection | corematerials | ukoer

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TALAT Lecture 1252: Corrosion and Corrosion Protection

Description

This lecture outlines the metallurgical principles of corrosion and corrosion protection of aluminium alloys. Basic knowledge of physics and chemistry and some familiarity with TALAT lectures 1201 through 1205 is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | corrosion | crevice corrosion | poultice corrosion | fretting corrosion | stress corrosion | galvanic corrosion | pitting corrosion | intergranular corrosion | exfoliation | kinetic reactivity | electrochemical circuit | electrolytic corrosion | corrosion protection | anodising | chemical conversion coatings | corematerials | ukoer

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TALAT Lecture 1252: Corrosion and Corrosion Protection

Description

This lecture outlines the metallurgical principles of corrosion and corrosion protection of aluminium alloys. Basic knowledge of physics and chemistry and some familiarity with TALAT lectures 1201 through 1205 is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | corrosion | crevice corrosion | poultice corrosion | fretting corrosion | stress corrosion | galvanic corrosion | pitting corrosion | intergranular corrosion | exfoliation | kinetic reactivity | electrochemical circuit | electrolytic corrosion | corrosion protection | anodising | chemical conversion coatings | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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TALAT Lecture 5104: Basic Approaches to Prevent Corrosion of Aluminium

Description

This lecture describes important measures for the prevention of corrosion of unprotected, bare aluminium. Basic knowledge of corrosion behaviour of aluminium and some knowledge of the electrochemical nature of corrosion is assumed

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | surface treatment | corrosion resistant alloys | wrought alloys | cast alloys | equipment design | galvanic corrosion | prevention | deposition corrosion | crevice corrosion | stress corrosion | stress corrosion resistant tempers | corrosion inhibitors | environment alteration | cathodic protection | sacrificial anodes | impressed current | alclad alloys | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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TALAT Lecture 5104: Basic Approaches to Prevent Corrosion of Aluminium

Description

This lecture describes important measures for the prevention of corrosion of unprotected, bare aluminium. Basic knowledge of corrosion behaviour of aluminium and some knowledge of the electrochemical nature of corrosion is assumed

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | surface treatment | corrosion resistant alloys | wrought alloys | cast alloys | equipment design | galvanic corrosion | prevention | deposition corrosion | crevice corrosion | stress corrosion | stress corrosion resistant tempers | corrosion inhibitors | environment alteration | cathodic protection | sacrificial anodes | impressed current | Alclad alloys | corematerials | ukoer

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ECorr: Corrosion of Zinc

Description

This case study gives a description of the corrosion properties of zinc; it looks at how zinc corrosion is effected by pH and features an interactive Pourbaix diagram. This is an introductory level case study.

Subjects

corrosion | engineering | metals | electrochemical | polarisation curves | corrosion rate | corrosion type | anodic | cathodic | passivity | pitting | gas evolution | diffusion control | tafel extrapolation | iron | copper | free corrosion potential | sulphuric acid | evans diagram | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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ECorr: Potential Measurement

Description

An important corrosion property often measured in the lab and field is the potential of an electrode. This case study gives an overview of how and why this is done as well as giving insight into how to interpret the measurements. This is an introductory level case study.

Subjects

corrosion | engineering | metals | steel | seawater | oxygen diffusion | surface | corrosion control | corrosion rate | cathodic protection | organic coating | evans diagrams | corrosion reactions | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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TALAT Lecture 2205: Special Design Issues

Description

This lecture describes the measurement and amount of residual stresses in extruded and welded profiles which have to be accounted for in design; it introduces the subject of corrosion and of preventive design measures; it describes the behavior and properties of structural aluminium alloys at ambient, low and elevated temperatures; it gives useful examples of structural applications of extrusions. Background in mechanical and structural engineering disciplines is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | design | product | structural design | residual stresses | extruded profiles | welded profiles | fatigue behaviour | corrosion | galvanic corrosion | differential aeration corrosion | working temperature | mechanical properties | linear thermal expansion | low temperatures | elevated temperatures | extrusion | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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ECorr: Introduction to Corrosion

Description

This case study gives a brief introduction to the subject of corrosion and helps in learning how to navigate and make use of the subsequent case studies. This is an introductory level case study.

Subjects

corrosion | engineering | metals | electrolyte | ph | zinc | near neutral solutions | passive metals | pourbaix diagrams | corrosion rate | corrosion products | stability | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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ECorr: Pipeline Corrosion

Description

This case study presents an investigation into the corrosion of a steel pipeline submerged in salt water; it covers corrosion rate and possible protective coatings for the pipeline. This is an advanced level case study.

Subjects

corrosion | engineering | metals | corrosion control | cathodic protection | marine structures | sacrificial anode | aluminium-zinc-indium anodes | corrosion rate | evans diagram | steel | impressed current | anode resistance | anode current | anode life time | anode consumption | design | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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TALAT Lecture 2205: Special Design Issues

Description

This lecture describes the measurement and amount of residual stresses in extruded and welded profiles which have to be accounted for in design; it introduces the subject of corrosion and of preventive design measures; it describes the behavior and properties of structural aluminium alloys at ambient, low and elevated temperatures; it gives useful examples of structural applications of extrusions. Background in mechanical and structural engineering disciplines is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | design | product | structural design | residual stresses | extruded profiles | welded profiles | fatigue behaviour | corrosion | galvanic corrosion | differential aeration corrosion | working temperature | mechanical properties | linear thermal expansion | low temperatures | elevated temperatures | extrusion | corematerials | ukoer

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3.A27 Case Studies in Forensic Metallurgy (MIT) 3.A27 Case Studies in Forensic Metallurgy (MIT)

Description

TV programs such as "Law and Order" show how forensic experts are called upon to give testimony that often determines the outcome of court cases. Engineers are one class of expert who can help display evidence in a new light to solve cases. In this seminar you will be part of the problem-solving process, working through both previously solved and unsolved cases. Each week we will investigate cases, from the facts that make up each side to the potential evidence we can use as engineers to expose culprits. The cases range from disintegrating airplane engines to gas main explosions to Mafia murders. This seminar will be full of discussions about the cases and creative approaches to reaching the solutions. The approach is hands-on so you will have a chance to participate in the process, not TV programs such as "Law and Order" show how forensic experts are called upon to give testimony that often determines the outcome of court cases. Engineers are one class of expert who can help display evidence in a new light to solve cases. In this seminar you will be part of the problem-solving process, working through both previously solved and unsolved cases. Each week we will investigate cases, from the facts that make up each side to the potential evidence we can use as engineers to expose culprits. The cases range from disintegrating airplane engines to gas main explosions to Mafia murders. This seminar will be full of discussions about the cases and creative approaches to reaching the solutions. The approach is hands-on so you will have a chance to participate in the process, not

Subjects

case studies | case studies | failure | failure | fracture | fracture | seminar | seminar | stainless steel | stainless steel | aluminum | aluminum | catastrophic failure | catastrophic failure | soldering | soldering | brazing | brazing | welding | welding | corrosion | corrosion | oxidation | oxidation | fatigue | fatigue

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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3.014 Materials Laboratory (MIT) 3.014 Materials Laboratory (MIT)

Description

This course is a required sophomore subject in the Department of Materials Science and Engineering, designed to be taken in conjunction with the core lecture subject 3.012 Fundamentals of Materials Science and Engineering. The laboratory subject combines experiments illustrating the principles of quantum mechanics, thermodynamics and structure with intensive oral and written technical communication practice. Specific topics include: experimental exploration of the connections between energetics, bonding and structure of materials, and application of these principles in instruments for materials characterization; demonstration of the wave-like nature of electrons; hands-on experience with techniques to quantify energy (DSC), bonding (XPS, AES, FTIR, UV/Vis and force spectroscopy), and degre This course is a required sophomore subject in the Department of Materials Science and Engineering, designed to be taken in conjunction with the core lecture subject 3.012 Fundamentals of Materials Science and Engineering. The laboratory subject combines experiments illustrating the principles of quantum mechanics, thermodynamics and structure with intensive oral and written technical communication practice. Specific topics include: experimental exploration of the connections between energetics, bonding and structure of materials, and application of these principles in instruments for materials characterization; demonstration of the wave-like nature of electrons; hands-on experience with techniques to quantify energy (DSC), bonding (XPS, AES, FTIR, UV/Vis and force spectroscopy), and degre

Subjects

electron | electron | electronic properties | electronic properties | magnetism | magnetism | magentic properties | magentic properties | structure | structure | crystal | crystal | lattice | lattice | energy | energy | thermodynamics | thermodynamics | differential scanning calorimetry (DSC) | differential scanning calorimetry (DSC) | x-ray diffraction (XRD) | x-ray diffraction (XRD) | scanning probe microscopy (AFM | scanning probe microscopy (AFM | STM) | STM) | scanning electron microscopy (SEM) | scanning electron microscopy (SEM) | UV/Vis | UV/Vis | Raman spectroscopy | Raman spectroscopy | FTIR spectroscopy | FTIR spectroscopy | x-ray photoelectron spectroscopy (XPS) | x-ray photoelectron spectroscopy (XPS) | vibrating sample magnetometry (VSM) | vibrating sample magnetometry (VSM) | dynamic light scattering (DLS) | dynamic light scattering (DLS) | phonon | phonon | quantum | quantum | quantum mechanics | quantum mechanics | radiation | radiation | battery | battery | fuel cell | fuel cell | ferromagnetism | ferromagnetism | ferromagnetic | ferromagnetic | polymer | polymer | glass | glass | corrosion | corrosion

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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3.014 Materials Laboratory (MIT) 3.014 Materials Laboratory (MIT)

Description

This course is a required sophomore subject in the Department of Materials Science and Engineering, designed to be taken in conjunction with the core lecture subject 3.012 Fundamentals of Materials Science and Engineering. The laboratory subject combines experiments illustrating the principles of quantum mechanics, thermodynamics and structure with intensive oral and written technical communication practice. Specific topics include: experimental exploration of the connections between energetics, bonding and structure of materials, and application of these principles in instruments for materials characterization; demonstration of the wave-like nature of electrons; hands-on experience with techniques to quantify energy (DSC), bonding (XPS, AES, FTIR, UV/Vis and force spectroscopy), and degre This course is a required sophomore subject in the Department of Materials Science and Engineering, designed to be taken in conjunction with the core lecture subject 3.012 Fundamentals of Materials Science and Engineering. The laboratory subject combines experiments illustrating the principles of quantum mechanics, thermodynamics and structure with intensive oral and written technical communication practice. Specific topics include: experimental exploration of the connections between energetics, bonding and structure of materials, and application of these principles in instruments for materials characterization; demonstration of the wave-like nature of electrons; hands-on experience with techniques to quantify energy (DSC), bonding (XPS, AES, FTIR, UV/Vis and force spectroscopy), and degre

Subjects

electron | electron | electronic properties | electronic properties | magnetism | magnetism | magentic properties | magentic properties | structure | structure | crystal | crystal | lattice | lattice | energy | energy | thermodynamics | thermodynamics | differential scanning calorimetry (DSC) | differential scanning calorimetry (DSC) | x-ray diffraction (XRD) | x-ray diffraction (XRD) | scanning probe microscopy (AFM | scanning probe microscopy (AFM | STM) | STM) | scanning electron microscopy (SEM) | scanning electron microscopy (SEM) | UV/Vis | UV/Vis | Raman spectroscopy | Raman spectroscopy | FTIR spectroscopy | FTIR spectroscopy | x-ray photoelectron spectroscopy (XPS) | x-ray photoelectron spectroscopy (XPS) | vibrating sample magnetometry (VSM) | vibrating sample magnetometry (VSM) | dynamic light scattering (DLS) | dynamic light scattering (DLS) | phonon | phonon | quantum | quantum | quantum mechanics | quantum mechanics | radiation | radiation | battery | battery | fuel cell | fuel cell | ferromagnetism | ferromagnetism | ferromagnetic | ferromagnetic | polymer | polymer | glass | glass | corrosion | corrosion

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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ECorr: Corrosion Kinetics

Description

This case study presents an investigation into the corrosion kinetics of copper and iron using electrochemical measurements to determine corrosion potentials and polarisation curves. This is an introductory level case study.

Subjects

corrosion | engineering | metals | corrosion potential | reference electrodes | reference scale | field measurements | calomel reference electrode | iron | zinc | nacl | standard hydrogen electrode | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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TALAT Lecture 1205: Introduction to Mechanical Properties, Casting, Forming, Joining and Corrosion

Description

This lecture provides background, basic information on mechanical properties and testing, solidification and casting, joining and corrosion of aluminium and its alloys. Basic knowledge of physics and chemistry and some familiarity with lectures 1201 and 1203 is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | mechanical properties | tensile testing | hardness testing | solidification | casting | joining | brazing | corrosion | corrosion protection | corematerials | ukoer

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aluMATTER: Corrosion and Corrosion Control

Description

By nature, aluminium is a highly reactive material. Fortunately it rapidly forms a thin and dense oxide layer that protects the underlying material very well. The presence of the oxide layer makes aluminium very suitable for many applications. However, in some environments aluminium may show corrosion behaviour. This package explains in detail the principles of aluminium corrosion and surface engineering that will enable the right use of aluminium in the right place. A selection of interactive Flash movies from the award-winning aluMATTER website available to download.

Subjects

corrosion | corrosion protection | aluminium | alumatter | animation | eaa | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-No Derivative Works 2.0 UK: England & Wales Attribution-Noncommercial-No Derivative Works 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-nd/2.0/uk/ http://creativecommons.org/licenses/by-nc-nd/2.0/uk/

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TALAT Lecture 1205: Introduction to Mechanical Properties, Casting, Forming, Joining and Corrosion

Description

This lecture provides background, basic information on mechanical properties and testing, solidification and casting, joining and corrosion of aluminium and its alloys. Basic knowledge of physics and chemistry and some familiarity with lectures 1201 and 1203 is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | mechanical properties | tensile testing | hardness testing | solidification | casting | joining | brazing | corrosion | corrosion protection | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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2.693 Principles of Oceanographic Instrument Systems -- Sensors and Measurements (13.998) (MIT) 2.693 Principles of Oceanographic Instrument Systems -- Sensors and Measurements (13.998) (MIT)

Description

This course introduces theoretical and practical principles of design of oceanographic sensor systems. Topics include: transducer characteristics for acoustic, current, temperature, pressure, electric, magnetic, gravity, salinity, velocity, heat flow, and optical devices; limitations on these devices imposed by ocean environments; signal conditioning and recording; noise, sensitivity, and sampling limitations; and standards. Lectures by experts cover the principles of state-of-the-art systems being used in physical oceanography, geophysics, submersibles, acoustics. For lab work, day cruises in local waters allow students to prepare, deploy and analyze observations from standard oceanographic instruments. This course introduces theoretical and practical principles of design of oceanographic sensor systems. Topics include: transducer characteristics for acoustic, current, temperature, pressure, electric, magnetic, gravity, salinity, velocity, heat flow, and optical devices; limitations on these devices imposed by ocean environments; signal conditioning and recording; noise, sensitivity, and sampling limitations; and standards. Lectures by experts cover the principles of state-of-the-art systems being used in physical oceanography, geophysics, submersibles, acoustics. For lab work, day cruises in local waters allow students to prepare, deploy and analyze observations from standard oceanographic instruments.

Subjects

Oceanography | Oceanography | monitoring | monitoring | instrumentation | instrumentation | experiment | experiment | sampling | sampling | transducer | transducer | meteorology | meteorology | calibration | calibration | noise | noise | ocean | ocean | water | water | sea water | sea water | telemetry | telemetry | data recorder | data recorder | satellite | satellite | current | current | salinity | salinity | pressure | pressure | corrosion | corrosion | underwater | underwater

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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Al-90 wt% Cu (bronze)

Description

This is a copper-aluminium bronze containing 10 wt% aluminium. A small amount of iron is often added to act as a grain refiner to improve the mechanical properties. Alloys with more than 8 wt% aluminium solidify as the ? phase. Below about 930°C, Widmanstätten ? phase precipitates. At the eutectoid temperature (565°C) the remaining ? decomposes to a lamellar eutectoid of ? and ?. Rapid cooling from the high temperature ? phase can form martensite instead of Widmanstätten ?. Aluminium bronzes have high strength, corrosion resistance and good high temperature properties (up to 300-400°C). Typical applications include bearings, gears and corrosion resistant vessels.

Subjects

alloy | aluminium | bronze | copper | corrosion resistance | lamella | martensite | metal | ätten | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

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Al-90 wt% Cu (bronze)

Description

This is a copper-aluminium bronze containing 10 wt% aluminium. A small amount of iron is often added to act as a grain refiner to improve the mechanical properties. Alloys with more than 8 wt% aluminium solidify as the ? phase. Below about 930°C, Widmanstätten ? phase precipitates. At the eutectoid temperature (565°C) the remaining ? decomposes to a lamellar eutectoid of ? and ?. Rapid cooling from the high temperature ? phase can form martensite instead of Widmanstätten ?. Aluminium bronzes have high strength, corrosion resistance and good high temperature properties (up to 300-400°C). Typical applications include bearings, gears and corrosion resistant vessels.

Subjects

alloy | aluminium | bronze | copper | corrosion resistance | lamella | martensite | metal | ätten | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

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Al-90 wt% Cu (bronze)

Description

This is a copper-aluminium bronze containing 10 wt% aluminium. A small amount of iron is often added to act as a grain refiner to improve the mechanical properties. Alloys with more than 8 wt% aluminium solidify as the ? phase. Below about 930°C, Widmanstätten ? phase precipitates. At the eutectoid temperature (565°C) the remaining ? decomposes to a lamellar eutectoid of ? and ?. Rapid cooling from the high temperature ? phase can form martensite instead of Widmanstätten ?. Aluminium bronzes have high strength, corrosion resistance and good high temperature properties (up to 300-400°C). Typical applications include bearings, gears and corrosion resistant vessels.

Subjects

alloy | aluminium | bronze | copper | corrosion resistance | lamella | martensite | metal | ätten | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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2.693 Principles of Oceanographic Instrument Systems -- Sensors and Measurements (13.998) (MIT)

Description

This course introduces theoretical and practical principles of design of oceanographic sensor systems. Topics include: transducer characteristics for acoustic, current, temperature, pressure, electric, magnetic, gravity, salinity, velocity, heat flow, and optical devices; limitations on these devices imposed by ocean environments; signal conditioning and recording; noise, sensitivity, and sampling limitations; and standards. Lectures by experts cover the principles of state-of-the-art systems being used in physical oceanography, geophysics, submersibles, acoustics. For lab work, day cruises in local waters allow students to prepare, deploy and analyze observations from standard oceanographic instruments.

Subjects

Oceanography | monitoring | instrumentation | experiment | sampling | transducer | meteorology | calibration | noise | ocean | water | sea water | telemetry | data recorder | satellite | current | salinity | pressure | corrosion | underwater

License

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Al-90 wt% Cu (bronze)

Description

This is a copper-aluminium bronze containing 10 wt% aluminium. A small amount of iron is often added to act as a grain refiner to improve the mechanical properties. Alloys with more than 8 wt% aluminium solidify as the ? phase. Below about 930°C, Widmanstätten ? phase precipitates. At the eutectoid temperature (565°C) the remaining ? decomposes to a lamellar eutectoid of ? and ?. Rapid cooling from the high temperature ? phase can form martensite instead of Widmanstätten ?. Aluminium bronzes have high strength, corrosion resistance and good high temperature properties (up to 300-400°C). Typical applications include bearings, gears and corrosion resistant vessels.

Subjects

alloy | aluminium | bronze | copper | corrosion resistance | lamella | martensite | metal | ätten | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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