Electrodeposition of Dense Chromium Coatings from Molten Salt Electrolytes

Abstract : Our research has showed the feasibility by pulsed current of chromium plating on nickel, iron, 4340 alloy. All the samples had a flat surface. The morphology of the deposits were examined by electronic microscopy. All the observations confirm: the compacity of coatings with a uniformity in size of crystals. The good continuity between the deposit and the matrix. The grain size and the preferential orientation in the growth after etching of a cross section. All the trails to obtain a coating inside a nickel or 4340 alloy cylinder were always a complete check.