Corrosion Resistance of Aluminium
A comprehensive guide to corrosion resistance of aluminium – from Faraday Laws to chemical cells. Understand all you need to know about corrosion resistance of aluminium.
From Book: Corrosion Resistance of Aluminum and Magnesium Alloys by E. Ghali
Selected Contents
Part One – Electrochemical Fundamentals and Active–Passive Corrosion Behaviors
Part Two – Performance and Corrosion Forms of Aluminum and Its Alloys
A. Properties of Aluminum
- Physical and General Properties of Aluminum
- Cast Aluminum Alloys
- Designation of Cast Aluminum Alloys and Ingots
- Alloying Elements
- Cast Alloys Series
- Wrought Aluminum Alloys
- Designation of Wrought Aluminum Alloys
- Alloying Elements
- Wrought Aluminum Alloys Series
- Description of the Wrought Alloys Series
- Aluminum Powders and Aluminum Matrix Composites
- Aluminum Powders
- Rapid Solidification Processing
- Aluminum Matrix Composites and P/M- MMCs
- Al MMC Particles and Formation
B. Use of Aluminum and Aluminum Alloys
- Use of Cast Aluminum Alloys
- Standard General Purpose Aluminum Alloys
- Some Specific Uses
- Use of Wrought Aluminum Alloys
- Aerospace Applications
- Automotive Sheet and Structural Alloys
- Shipping
- Building and Construction
- Packaging
- Electrical Conductor Alloys
C. Aluminum Performance
- Resistance of Aluminum Alloys to Atmospheric Corrosion
- Factors Affecting Atmospheric Corrosion of Aluminum Alloys
- Water Corrosion
- Seawater
- Soil Corrosion
- Some Aggressive Media: Acid and Alkaline Solutions
- Acids
- Alkalis
- Dry and Aqueous Organic Compounds
- Gases
- Mercury
- Corrosion Performance of Alloys
- Performance of the Cast Series
- Performance of the Wrought Series
- Aluminum High-Temperature Corrosion
- References
-
General, Galvanic, and Localized Corrosion of Aluminum and Its Alloys
- Overview
A. General Corrosion
- General Considerations
- Description
- Mechanisms
- Prevention
- Design Considerations
- Surface Pretreatment
- Corrosion Control
- Aluminum Alloys and Resistance to General Corrosion
B. Galvanic Corrosion
- General Considerations
- Galvanic Series of Aluminum Alloys
- Mechanisms
- Cu–Al Galvanic Cell
- Mg–Al Galvanic Cell
- Galvanic Effect of a Coating
- Deposition Corrosion
- Stray Current Corrosion
- Prevention
- Basic Study of Al–Cu Galvanic Corrosion Cell
C. Localized Corrosion
- Pitting Corrosion
- Occurrence and Morphology
- Kinetics
- The Pitting Potential
- Mechanisms
- Possible Stages of Pitting
- Prevention of Pitting Corrosion
- Corrosion Resistance of Aluminum Cathodes
- Crevice Corrosion
- General Considerations and Description
- Poultice Corrosion
- Mechanisms
- Water Stains on AA3xxx
- Filiform Corrosion
- General Considerations
- Aluminum Alloys and Filiform Corrosion
- Kinetics, Mechanism, and Prevention
- Filiform Occurrence
- References
-
Metallurgically and Microbiologically Influenced Corrosion of Aluminum and Its Alloys
-
Mechanically Assisted Corrosion of Aluminum and Its Alloys
- Overview
A. Erosion Corrosion
- Impingement with Liquid-Containing Solid Particles
- Corrosion by Cavitation
- Water Drop Impingement Corrosion
- Fretting Corrosion
- Fretting Fatigue Corrosion
- Prevention of Erosion Corrosion
B. Corrosion Fatigue
- General Considerations and Morphology
- Parameters
- Environmental Considerations
- Cyclic Stresses
- Material Factors
- Mechanisms of Corrosion Fatigue
- Corrosion Fatigue of Aluminum Alloys
- Corrosion Fatigue of AA7017- T651
- Corrosion Fatigue of AA7075- T6
- Corrosion Fatigue of Al–Mg–Si Compared to Al–Mg Alloys
- Modeling of the Propagation of Fatigue Cracks in Aluminum Alloys
- Prevention of Corrosion Fatigue
- References
-
Environmentally Induced Cracking of Aluminum and Its Alloys
- Overview
- Introduction and Definition of SCC
- Key Parameters
- Stress
- Environment
- SCC Parameters of Aluminum Alloys
- Influence of Stress
- Role of Environment
- SCC Mechanisms
- Overlapping of Cracking Phenomena
- Significance of the Magnitude of Strain Rates
- Cracking Initiation and Propagation
- SCC of Aluminum Alloys
- SCC Resistance of Aluminum Alloys
- Influence of Heat Treatments on Corrosion Forms
- SCC of Welded Aluminum Alloys
- Galvanic Corrosion and SCC of Welded Assemblies
- SCC Knife-Line Attack
- Localized Corrosion and SCC of LBW AA6013
- Mechanically Influenced Corrosion and SCC of Welds
- Corrosion Fatigue of Friction Stir Welding White Zone
- SCC of Friction Stir Welded 7075 and 6056 Alloys
- SCC of FSW of 7075-T651 and 7050-T451 Alloys
- Prevention of SCC
- Design and Stresses
- Environmental Considerations
- Metallurgical Considerations
- Surface Modification
- Prevention of Hydrogen Damage
- References
Part Three – Performance and Corrosion Forms of Magnesium and Its Alloys
Part Four – Coating and Testing
-
Aluminum Coatings: Description and Testing
- Overview
- Inhibitors
- Metallic Coatings
- Conventional Plating and Electroless Plating of Aluminum
- Surface Preparation for Thermal Spraying
- Sacrificial Protection by Aluminum Alloys
- Aluminum Powder as a Coating
- Cathodic Protection of Aluminum Alloys
- Conversion Coating
- Phosphates and/or Chromates
- Chromate–Phosphate Treatments
- Chromate Alternatives
- Anodization
- Organic Finishing
- Thermoplastic Coatings or Liquors
- Converted Coating During or After Application
- Coatings Containing Metals More Active than Aluminum
- Electrodeposited Coatings
- Corrosion Testing of Coated Metal
- Electrochemical Testing of Coatings
- Conventional Testing
- Corrosion Fatigue of Thermal Spraying of Aluminum as a Coating
- Environmentally Assisted Cracking of Metallic Sprayed Coatings
- References
-
Magnesium Coatings: Description and Testing
- Overview
- General Approach and Surface Preparation
- Metallic and Conversion Coatings
- Metallic Coatings
- Chemical Conversion Surface Treatments
- Anodic Treatments
- Anodizing Description and Approaches
- Formation of Anodized Coatings
- Properties and Chemical Composition
- Some Industrial and Developing Anodizing Processes
- Forms of Surface Corrosion: Anodized or with Conversion Treatments
- Surface Modification
- Chemical and Physical Vapor Deposition
- The H-Coat and Magnesium Hydrides
- Electrochemical Characterization of the Metal–Film Interface
- OCP and Polarization Studies of the Metal–Oxide Interface
- Impedance Measurements
- Organic Finishing and Corrosion Testing of Coated Material
- Organic Coatings
- Conventional Corrosion Testing of Coated Metal
- References
Part Five – Evaluation and Testing
-
Conventional and Electrochemical Methods of Investigation
- Overview
- Corrosion Testing Approaches and Methods of Investigation
- Testing Approach
- Categories of Corrosion Testing
- Testing Duration
- Testing Modes
- Removal of Corrosion Products
- Physical and Mechanical Testing of Corroded Materials
- Visual and Microscopic Techniques of Testing
- Nondestructive Evaluation Techniques
- Mechanical Testing
- Chemical Analysis
- Surface Chemical Analysis
- Published Data of Performance and Corrosion Resistance
- Electrochemical Polarization Studies
- Measurements of the Corrosion Potential
- Potentiodynamic Methods
- Cyclovoltammetry Techniques and Pitting
- Potentiostatic, Galvanostatic, and Galvanodynamic Methods
- The ac Electrochemical Impedance Spectroscopy Technique
- Introduction
- EIS Terms and Equivalent Circuits
- Impedance Plots
- Electrochemical Noise Measurements
- Historical and Electrochemical Noise Definition
- EN Generation and Data Acquisition Systems
- Analysis of ENM Data
- Potentiodynamic, Potentiostatic, and Galvanostatic EN Studies
- Scanning Reference Electrode Technique
- Microsystems and Wire Beam Electrode
- Microsystems and Atomic Force Microscopy
- Wire Beam Electrode
- References
-
Evaluation of Corrosion Forms of Aluminum and Its Alloys
- Overview
- General Corrosion of Aluminum and Its Alloys
- Galvanic Corrosion
- General Considerations
- Influence of the Composition and Microstructure
- Electrochemical Testing
- Localized Corrosion of Aluminum and Its Alloys
- Pitting Corrosion
- Crevice Corrosion
- Filiform Corrosion Testing of Al Alloys
- Metallurgically Influenced Corrosion
- Intergranular Corrosion Testing
- Exfoliation Testing
- Joining and Testing
- MIC and Biodegradation Evaluation
- Mechanically Influenced Corrosion of Aluminum and Its Alloys
- Erosion Corrosion Testing
- Corrosion Fatigue Testing
- Environmentally Influenced Corrosion
- SCC Testing Procedures of Aluminum Alloys
- Test Specimens
- Stressors
- Fracture Morphology and SCC of Aluminum Alloys
- References
-
Evaluation of Corrosion Forms of Magnesium and Its Alloys
- Overview
- Testing Solutions
- Hydroxide Solutions
- Chloride, Sulfate, and Hydroxide Solutions
- ASTM D1384-96 Corrosive Water
- Buffered Solutions
- General Corrosion Form
- Immersion Testing and Corrosion Rate
- Salt Spray Corrosion Test
- Some Electrochemical Methods of Investigation
- Galvanic or Bimetallic Corrosion of Magnesium and Its Alloys
- Localized Corrosion of Magnesium and Its Alloys
- Open Circuit Potential and Pitting Corrosion Studies
- Electrochemical Noise Measurements
- Magnesium SRET Studies
- Metallurgically Influenced Corrosion of Magnesium and Its Alloys
- MIC and Biodegradation of Magnesium and Its Alloys
- Corrosion Fatigue
- SCC Testing and Evaluation of Magnesium Alloys
- Static Loading of Smooth Specimens and General Considerations
- Stresses
- Solutions and Operational Conditions
- Constant Extension Rate and Linearly Increasing Stress Tests
- SCC CERT Versus LIST Techniques
- References
Comprehensive guide to corrosion resistance of aluminium. From physical & general properties to Faraday laws & aluminum matrix composites – understand it all here!