An Initial Study of Deposition and Codeposition of Nickel and Chromium from Non-Aqueous Electrolytes

Abstract

SummaryDeposition and codeposition of nickel and chromium from organic and inorganic solvents are reviewed. It is shown that ductile adherent chromium deposits can be obtained from an acetone bath using 1–10 mA/cm2 at 15°C. Pure nickel deposits are obtained from an acetone bath using up to 20 mA/cm2 at 15°C and an acetic acid bath using 1–30 mA/cm2 at 20°C. It is further shown that additions of chromic chloride to a methanol bath lead to deposition of pure nickel deposits from 1–15 mA/cm2 at 20—40°C. An optimum quantity of 20 g/1 of chromic chloride gives a cathode efficiency of 100 per cent at 10 mA/cm2. All the baths are shown to function in the presence of water. Codeposition is obtained from a methanol bath at 50 mA/cm2 at 20°C. It is shown that aluminium can be directly plated with nickel from a methanol bath, although consistently good adhesion is not obtained.