Influence of Temperature on Corrosion Product Film Formation on CuNi10Fe in the Low Temperature Range: I. Corrosion rate as a function of temperature in well aerated sea water

Abstract

It was found that the corrosion rate of CuNi10Fel·4 in aerated sea water at 40 and 50°c was lower than that at the lower sea water temperatures of 10–30°c. This was mainly due to the quick formation of a protective layer of corrosion products at the higher temperatures. Moreover, the protectiveness of these layers appeared to be better than that of layers which werefound at the lower temperatures. For the alloy in the as-delivered condition the layers obtained at the higher temperatures were thin, gold-brown coloured and adhered well to the metal substrate. On the contrary, the low temperature layers were thicker, darkbrown to dark-grey/black coloured, while the adherence to the metal substrate was weaker.