THE CORROSION OF COPPER-NICKEL-ALLOYS IN SULFIDE-POLLUTED SEAWATER - THE EFFECT OF SULFIDE CONCENTRATION

In this investigation, the effect of the concentration of dissolved sulfide on the corrosion of Cu-Ni alloys in standard seawater was investigated. It is seen that the corrosion rates of both Cu-Ni alloys generally increase with increasing sulfide concentrations. The result of the present investigation was compared to the data reported in the literature and excellent agreement was obtained in some cases. A possible mechanism for the acceleration ot corrosion is proposed. It is concluded that sulfide acts as a catalyst for both the anodic and cathodic reactions. It is shown that CuS precipitates first and is converted to Cu2S during the corrosion process.