Aluminum alloys corrosion physical properties

Summerson, T. J. and Sprowls, D. O., Corrosion Behavior of Aluminum Alloys, Conference Proceedings Volume HI, Aluminum Alloys Their Physical and Mechanical Properties, E. A. Starke, Jr. and T. H. Sanders, Jr., Eds., Engineering Materials Advisory Services Ltd., West Midlands, U.K., 1986, pp. 1576-1662. 

Sinyavski, V. S., Kalinin, V. D., and Dorokhina, V. E., "Study of Correlations Between Structural, Electrochemical and Physical Characteristics and Resistance to Exfoliation Corrosion of Aluminum Alloys," Proceedings of the Second International Conference on Aluminum Alloys-Hieir Physical and Mechanical Properties, International Academic Publishers, A Peigamon-CNPIEC Joint Venture, 1990, pp. 692-697. 

Corrosion of laser welded AA6061 aluminum alloy parts has been studied in an aerated 3.5% NaCl solution at room temperature [24]. Welding changes the physical structure and corrosion properties of the metal at the weld. Welding tends to create a... 

The usual alloying additions to aluminum in order to improve physical properties include Cu, Si, Mg, Zn, and Mn. Of these, manganese may actually improve the corrosion resistance of wrought and cast alloys. One reason is that the compound MnAle forms and takes iron into solid solution. The compound (MnFe)Alg settles to the bottom of the melt, in this way reducing the harmful influence on corrosion of small quantities of alloyed iron present as an impurity [27]. No such incorporation occurs in the case of cobalt, copper, and nickel, so that manganese additions would not be expected to counteract the harmful effects of these elements on corrosion behavior. 

Wilson E., The corrosion products and mechanical properties of certain light aluminum alloys as aflfected by atmospheric exposure. Proceedings of the Physical Society of London, vol. 30,1926, p. 15-25. 

Figure 8.1 Effect of pH on corrosion of 1100-H14 alloy (aluminum) by various chemical solutions. Observe the minimal corrosion in the pH range of 4-9. The low corrosion rates in acetic acid, nitric acid, and ammonium hydroxide demonstrate that the nature of the individual ions in solution is more important than the degree of acidity or alkalinity. (Courtesy of Alcoa Laboratories from Aluminum Properties and Physical Metallurgy, ed. John E. Hatch, American Society for Metals, Metals Park, Ohio, 1984, Figure 19, page 295.)...

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