The Galvanic Corrosion Of Aluminum

Corrosion of Aluminium highlights the practical and general aspects of the corrosion of aluminium alloys with many illustrations and references. In addition to that, the first chapter allows the reader who is not very familiar with aluminium to understand the metallurgical, chemical and physical features of the aluminium alloys. The author Christian Vargel, has adopted a practitioner approach, based on the expertise and experience gained from a 40 year career in aluminium corrosion This approach is most suitable for assessing the corrosion resistance of aluminium- an assessment which is one of the main conditions for the development of many uses of aluminium in transport, construction, power transmission etc. 600 bibliographic references provide a comprehensive guide to over 100 years of related study Providing practical applications to the reader across many industries Accessible to both the beginner and the expert

In a systematic study of galvanic corrosion of aluminum alloys the effects of the dissimilar metal, the solution composition, and area ratio have been evaluated using galvanic current and weight loss measurements. In 3.5 percent sodium chloride, galvanic corrosion rates of the aluminum alloys 1100, 2024, 2219, 6061, and 7075 decrease with the nature of the dissimilar metal in the order: silver > copper > 4130 steel ” stainless steel ? nickel > Inconel 718 ” Ti-6Al-4V ? Haynes 188 > tin > cadmium. Coupling to zinc did not lead to cathodic protection of the aluminum alloys as shown by weight loss data, although the aluminum alloys were the cathode in the aluminum-zinc couple. The potential difference of uncoupled dissimilar metals has been found to be a poor indicator of galvanic corrosion rates. Dissolution rates of aluminum alloys coupled to a given dissimilar material are higher in 3.5 percent sodium chloride than in tap water and distilled water where they are found to be comparable. The effect of area ratio AC/AA has been studied in 3.5 percent sodium chloride for area ratios of 0.1, 1.0, or 10. The galvanic curent was found to be independent of the area of the anode, but directly proportional to the area of the cathode. The galvanic current density has been studied in 3.5 percent sodium chloride for area ratios of 0.1, 1.0, or 10. The galvanic curent was found to be independent of the area of the anode, but directly proportional to the area of the cathode. The galvanic current density igA with respect to the anode has been found to be directly proportional to the area ratio (with respect to the anode has been found to be directly proportional to the area ratio (igA = = k1AC/AA), while the dissolution rate), while the dissolution rate rA of the anode was related to area area ratio by rA = k2 (1 + AC/AA). The results obtained have been explained based on mixed potential theory. Electrochemical methods for measurements of galvanic currents are described in the Appendix.

Corrosion of Aluminium highlights the practical and general aspects of the corrosion of aluminium alloys with many illustrations and references. In addition to that, the first chapter allows the reader who is not very familiar with aluminium to understand the metallurgical, chemical and physical features of the aluminium alloys. The author Christian Vargel, has adopted a practitioner approach, based on the expertise and experience gained from a 40 year career in aluminium corrosion This approach is most suitable for assessing the corrosion resistance of aluminium- an assessment which is one of the main conditions for the development of many uses of aluminium in transport, construction, power transmission etc. 600 bibliographic references provide a comprehensive guide to over 100 years of related study Providing practical applications to the reader across many industries Accessible to both the beginner and the expert

Comprehensive information for the American aluminium industry Collective effort of 53 recognized experts on aluminium and aluminium alloys Joint venture by world renowned authorities-the Aluminium Association Inc. and American Society for Metals. The completely updated source of information on aluminium industry as a whole rather than its individual contributors. this book is an opportunity to gain from The knowledge of the experts working for prestigious companies such as Alcoa, Reynolds Metals Co., Alcan International Ltd., Kaiser Aluminium & Chemical Corp., Martin Marietta Laboratories and Anaconda Aluminium Co. It took four years of diligent work to complete this comprehensive successor to the classic volume, Aluminium, published by ASM in 1967. Contents: Properties of Pure Aluminum Constitution of Alloys Microstructure of Alloys Work Hardening Recovery, Recrystalization and Growth Metallurgy of Heat Treatment and General Principles of Precipitation Hardening Effects of Alloying Elements and Impurities on Properties Corrosion Behaviour Properties of Commercial Casting Alloys Properties of Commercial Wrought Alloys Aluminum Powder and Powder Metallurgy Products.