PROCESS OF ELECTROPLATING AN ARTICIE BY DEPOSITION OF THICK CHROMIUM FILMS FROM AQUEOUS SOLUTIONS OF CHROMIUM(III)-THIOCYANATE COMPLEXES

摘要

A process of electroplating an article with a layer of chromium exceeding five microns in thickness comprising the step of electroplating the article with an initial layer of chromium from an equilibrated aqueous solutions of chromium (III)-thiocyanate complexes of chromium concentration less than ----- initial layer being thin in comparison with the ----- to be plated, and plating the major proportion ----- containing thickness in one or more steps from an ----- aqueous solution of chromium (III)-thiocyanate complexes of chromium concentration greater than 0.03.