Zinc alloys corrosion behaviour

N.E. Idenyi, C.E. Ekuma (2006). The effects of zinc additions on the corrosion behaviour of aluminium alloy in saline environments. Journal of the Nigerian Environmental Society 3, p. 109. 

Zinc plating layers transformed by a heat treatment at 903 K (630 °C) completely into iron-zinc alloy phase (galvannealing) showed much better behaviour in the exposure zones. The corrosion protective effect of the hot-dip galvanised layers in seawater is thus not determined only by layer thickness, but also by the layer structure [216]. 

Water is commonly described either in terms of its nature, usage, or origin. The implications in these descriptions range from being highly specific to very general. The present handbook compiles new and updated information on the corrosion behaviour of iron, nickel, zinc and their alloys in contact with the following water... 

Guessoum K., Veys-Renaux D., Rocca E., Belhamel K. (2011), Corrosion behaviour of zinc-cerium alloys Role of intermetallic phases , Corros. Sci. 53 1639-1645. 

The three most corrosive sites were rifle peat (pH 2-6), cinders (pH 7 -6) and tidal marsh (pH 6-9). Corrosion of some of the alloys was particularly severe in the cinders. The behaviour of the brasses tested, particularly those high in zinc, was rather different from that of the other materials. In most cases dezincification occurred and the brasses were the worst materials in... 

Corrosion resistance The corrosion resistance of a copper deposit varies with the conditions under which it is deposited and may be influenced by co-deposited addition agents (see, for example, Raub ). Copper is, however, plated as a protective coating only in specialised applications, and the chief interest lies in its behaviour as an undercoating for nickel-chromium on steel and on zinc-base alloy. Its value for this purpose has long been a controversial issue. 

This handbook highlights the limitations of iron, nickel, zinc and their alloys in various water grades and provides vital information on corrosion protection measures. The chapters are arranged by the media leading to individual corrosion reactions, and a vast number of alloys are presented in terms of their behaviour in these media. The key information consists of quantitative data on corrosion rates coupled with commentaries on the background and mechanisms of corrosion behind these data, together with the dependencies on secondary parameters, such as flow-rate, pH, temperature, etc. Where necessary this information is complemented by more detailed annotations and by an immense number of references Usted at the end of each chapter. 

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