Functional Trivalent Chromium Electroplating Of Internal Diameters

Faraday will discuss recent research work on the development of a functional trivalent chromium plating process from a trivalent-based electrolyte to replace hexavalent chromium plating.  Hexavalent chromium plating has been used for many years to provide hard, durable coatings with excellent wear and corrosion resistance properties.  However, hexavalent chromium baths have come under increasing scrutiny due to the toxic nature of the bath, effects on the environment, and workers’ health.  In this paper, Faraday will present results from its development program aimed at achieving properties comparable to existing hexavalent chromium plating for functional applications. Specifically, recent efforts in plating chromium on the internal surfaces of cylindrical parts will be presented, as well as wear test data.