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Full Description
The use of magnesium alloys is increasing in a range of applications, and their popularity is growing wherever lightweight materials are needed. This book provides a comprehensive account of the corrosion of magnesium alloys. It covers not only the corrosion performances and mechanisms of Mg alloys in conventional environments, such as sodium chloride solutions, but also looks at their corrosion behaviours in special media, like engine coolants and simulated body fluids.Part one covers fundamentals such as the corrosion electrochemistry, activity and passivity of magnesium and its alloys. Part two then considers the metallurgical effect in relation to the corrosion of magnesium alloys, including the role of micro-structure and earth-rare elements, the corrosion behaviour of magnesium-based bulk metallic glasses, and the corrosion of innovative magnesium alloys. Part three goes on to describe environmental influences on the corrosion of magnesium alloys, such as atmospheric corrosion, stress corrosion cracking, creep and fatigue behaviour, and galvanic corrosion. Finally, part four is concerned with various means of protecting magnesium alloys against corrosion through the use of aluminium electrodeposition, conversion and electrophoretic coatings, and anodisation.With its distinguished editor and team of contributors, this book is an invaluable resource for metallurgists, engineers and designers working with magnesium and its alloys, as well as professionals in the aerospace and automotive industries.
Contents
Contributor contact detailsPrefacePart I: FundamentalsChapter 1: Corrosion electrochemistry of magnesium (Mg) and its alloysAbstract:1.1 Introduction1.2 Thermodynamics1.3 Surface film1.4 Anodic process1.5 Cathodic process1.6 Corrosion mechanism and characteristic processesChapter 2: Activity and passivity of magnesium (Mg) and its alloysAbstract:2.1 Active and passive behaviors of magnesium (Mg) and its alloys2.2 Passive properties and stability2.3 Improvements and promising avenues of the passive behavior2.4 Specific factors characterizing corrosion behavior2.5 Active and passive behaviors and corrosion forms2.6 Performance of sacrificial magnesium (Mg) and its alloys2.7 Mechanism of corrosion of sacrificial anodes2.8 Examples of actual and possible uses2.9 Evaluation of the sacrificial behavior2.10 Future trends2.11 AcknowledgementsPart II: Metallurgical effectsChapter 3: Corrosion of magnesium (Mg) alloys and metallurgical influenceAbstract:3.1 Introduction3.2 Measurement details3.3 Second phase effect3.4 Impurity concentration3.5 Surface condition3.6 Medical implant applications3.7 Concluding remarks3.8 AcknowledgementsChapter 4: Role of structure and rare earth (RE) elements on the corrosion of magnesium (Mg) alloysAbstract:4.1 Introduction4.2 Role of structure on the corrosion process of magnesium (Mg) alloy4.3 Role of rare earth (RE) elements on the corrosion process of magnesium (Mg) alloyChapter 5: Corrosion behaviour of magnesium (Mg)-based bulk metallic glassesAbstract:5.1 Introduction5.2 Magnesium (Mg)-based bulk metallic glasses (BMGs)5.3 Effect of micro-structural refinement on the corrosion of magnesium (Mg)-based alloys5.4 General corrosion and passivation behaviour of magnesium (Mg)-based bulk metallic glasses (BMGs)5.5 Chloride-induced local corrosion behaviour of magnesium (Mg)-based metallic glasses5.6 Effect of hydrogen on the stability of magnesium (Mg)-based glassy alloys5.7 Future trends5.8 AcknowledgementsChapter 6: Corrosion of innovative magnesium (Mg) alloysAbstract:6.1 Recycled alloys6.2 Amorphous alloys6.3 Alloy coatings6.4 Ion implantation6.5 Laser processed magnesium (Mg) alloysPart III: Environmental influencesChapter 7: Atmospheric corrosion of magnesium (Mg) alloysAbstract:7.1 Introduction7.2 The atmospheric environment7.3 Electrochemical reactions7.4 The oxide film7.5 The effect of atmospheric gases and particles7.6 Corrosion of magnesium (Mg) alloys during field exposure7.7 Corrosion products7.8 Influence of microstructure on the atmospheric corrosion behaviour7.9 Differences between field-exposed magnesium (Mg) and accelerated tests7.10 Concluding remarksChapter 8: Stress corrosion cracking (SCC) of magnesium (Mg) alloysAbstract:8.1 Introduction8.2 Alloy influences8.3 Loading8.4 Environmental influences8.5 Fractography8.6 Stress corrosion cracking (SCC) mechanisms8.7 Recent insights8.8 Open issues8.9 AcknowledgementsChapter 9: Corrosion creep and fatigue behavior of magnesium (Mg) alloysAbstract:9.1 Introduction9.2 Historical review of environmentally enhanced creep and fatigue of metals9.3 Mechanoelectrochemical behavior of magnesium (Mg) alloys9.4 Corrosion creep of magnesium (Mg) and diecast magnesium (Mg) alloys9.5 Corrosion fatigue of magnesium (Mg) alloys9.6 SummaryChapter 10: Magnesium (Mg) corrosion: a challenging concept for degradable implantsAbstract:10.1 An introduction to degradable magnesium (Mg) implants10.2 The appropriate selection and use of biodegradable magnesium (Mg) alloys10.3 In vivo corrosion of magnesium (Mg) alloys: what happens in living tissue?10.4 Methods to characterize in vivo corrosion10.5 In vitro corrosion test methods10.6 Future trendsChapter 11: Corrosion of magnesium (Mg) alloys in engine coolantsAbstract:11.1 Introduction11.2 Magnesium (Mg) alloys and coolants11.3 Laboratory evaluation methodology11.4 Corrosion of magnesium (Mg) in ethylene glycol solution11.5 Magnesium (Mg) alloys in ethylene glycol solution11.6 Magnesium (Mg) alloys in commercial coolants11.7 Corrosion inhibition11.8 Health and environmental concerns11.9 SummaryChapter 12: Numerical modelling of galvanic corrosion of magnesium (Mg) alloysAbstract:12.1 Introduction12.2 Boundary element method (BEM) model12.3 One-dimensional (1D) galvanic corrosion12.4 Galvanic interaction12.5 Steel fastener12.6 Discussion12.7 Conclusions12.8 Future trends12.9 AcknowledgementsChapter 13: Non-aqueous electrochemistry of magnesium (Mg)Abstract:13.1 Introduction13.2 A short review of non-aqueous electrolyte solutions13.3 A short review of the passivation phenomena of active metals in non-aqueous electrolyte solutions13.4 Magnesium (Mg) electrodes in conventional polar aprotic solvents and in Grignard solutions13.5 Ionic liquids (ILs) for magnesium (Mg) electrochemistry13.6 On solutions with a wide electrochemical window (> 2 V) in which magnesium (Mg) deposition is reversible13.7 On magnesium (Mg) ions insertion into inorganic hosts13.8 Future trendsPart IV: Corrosion protectionChapter 14: Electrodeposition of aluminum (Al) on magnesium (Mg) alloy in ionic liquidAbstract:14.1 Introduction14.2 Basics for ionic liquid plating14.3 Electrochemical characteristics of AlCl3-EMIC ionic liquids14.4 Material characteristics14.5 Electrochemical and corrosion resistance of aluminum (Al) and aluminum/zinc (Al/Zn)-coated magnesium (Mg) alloys14.6 Summary14.7 AcknowledgementChapter 15: Corrosion protection of magnesium (Mg) alloys using conversion and electrophoretic coatingsAbstract:15.1 Introduction15.2 Conversion coating for magnesium (Mg) and its alloys15.3 Electrocoat15.4 Concluding remarksChapter 16: Anodization and corrosion of magnesium (Mg) alloysAbstract:16.1 Overview of anodizing techniques16.2 Characteristics of anodizing behavior16.3 Anodized coating/film16.4 Influencing factors16.5 Anodizing mechanism16.6 Corrosion of anodized magnesium (Mg) alloys16.7 Application examplesChapter 17: Corrosion of magnesium (Mg) alloys: concluding remarksIndex
