Determination of the Corrosion Rate of Ni-Fe Coatings by Measuring Polarization Resistance

摘要

From the results, the method is suitable for determination of the corrosion rate of the alloy coating in various media and with various corrosion mechanisms. It was determined that the corrosion rate of glossy alloy coatings (containing sulfur) is very low and its values are approximately 65 times lower in the solution of sulfuric acid and 4 times lower in the CASS solution compared to alloy coatings produced in a bath without gloss-producing additives. In glossy Ni-Fe alloy coatings, corrosion rates in the solution of sulfuric acid and in the CASS solution remain almost unchanged when the Fe content is gradually increased to 35%. This may be an important factor when utilization of these coatings in the area of decorative and protective metal plating is considered. (ERA citation 08:012703)