Hard chrome plating is an electrolytic process utilising a chromic acid-based electrolyte. The component requiring plating becomes the cathode and, with the passage of a DC current via anodes, chromium metal builds on the component surface.Hard chrome plating, also referred to as functional chrome plating, is applied as a thinner layer. It is ideal for close tolerance applications where an excessive build up of chrome is undesirable and where the requirement is to provide a durable hard wear-resisting surface. Coating thickness is dependent on the application and the customers’ requirements, which can normally range from 10 to 25 microns. This smaller deposit of hard chrome usually eliminates the need for a grinding operation to finish. Etching is carried in accordance with the guidance relevant to the base material being plated. All components are etched before Hard Chrome plating to provide a good key for the hard chrome deposit to be applied. Careful jigging is required for hard chrome plating on roller, taking into consideration current carrying capacity and weight of component. Special attention is necessary for the plating of internal surfaces. One of the characteristics of hard chrome is its poor throwing power, therefore auxiliary anodes maybe required at strategic locations.