Examination of the cross-section of the film on aluminum and its alloys, while attached to the metal, reveals that the second phase particles play an important part in the corrosion pattern. The 2S aluminum contains at least two types of second phase particles, one of which corrodes more rapidly while the other corrodes more slowly than the surrounding aluminum. The majority of second phase particles in the 157 alloy corrode more slowly than the surrounding aluminum.

6.4.2, 4.6.5, 3.2.3

Subject
Water, Corrosion rate, Metal surfaces, Aluminum, Metal oxides, Weight gain, Pure water, Corrosion products, Oxide surfaces, Metals, Color, Aluminum alloys, Alloys
© 1961 National Association of Corrosion Engineers
1961
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