The Corrosion of Cu-Ni Alloys 706 and 715 in Flowing Sea Water. II – Effect of Dissolved Sulfide

A review of the effects of benzotriazole on the corrosion of copper and copper alloys in clean and polluted environments

“…There is a large number of variables, e.g., composition of the material, concentration of pollutants, environments… etc. In spite of the high corrosion resistance of these alloys, they suffered from severe corrosion in media polluted by sulfide ions [18,20,[69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84]. This is a problem of considerable significance in view of the fact that many industrial water streams and indeed some natural water bodies are polluted by dissolved sulfides.…”

Copper and Copper Alloys

“…Digenite (Cu 5 S 9 ), chalcocite (Cu 2 S), and covellite (CuS) have been produced by SRB on copper surfaces [227,228]. Macdonald et al [228] reported the formation of djurleite (Cu 1.96 S) from SRB activity on copper alloys.…”

“…Macdonald et al [228] reported the formation of djurleite (Cu 1.96 S) from SRB activity on copper alloys. Chalcocite is the most characteristic corrosion product in SRB-induced corrosion of copper.…”

Formation of copper—iron sulfide minerals during corrosion of artifacts and possible implications for pseudogilding

“…Blue-remaining covellite, C U S~+~, differs from stoichiometric covellite, CuS, in that it appears blue under plane-polarized reflected light, while stoichiometric covellite, blue under unpolarized light, appears red. No occurrences of anilite (Cu,S,), digenite (Cu9S5), or djurleite (Cu,,S,,) were reported, though all are known as products of SRB-induced corrosion (Macdonald et al, 1979;North and MacLeod, 1986;McNeil et al, 1991) and of other sulfiding corrosion under equivalent chemical conditions (Mor and Beccaria, 1975). Baas Becking and Moore (1961) suggest that (metastable) digenite is the first corrosion product, that it then alters to chalcocite, and that this is the only room-temperature wet path from copper or cuprite to chalcocite.…”