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摘要
The initial atmospheric corrosion of a brass (Cu-20Zn) alloy induced by carboxylic (formic, acetic, and propionic) acids has been investigated through surface or near-surface analytical techniques. The main reaction products identified were Zn-carboxylate and a Cu(2)O-like layer. Their formation kinetics reveal the galvanic effects due to Volta potential variations along the surface, which result in corrosion cells with central anodic formation of zinc-carboxylate and peripheral cathodic formation of Cu(2)O. The corrosion cell size increases as propionic < acetic < formic acid, reflecting the dependence on ionic conductivity of the aqueous adlayer.
- 出版日期2011
