Manufacturing Industry
Thin, dense, chromium coating protects parts. (Tech Spotlight).
Advanced Materials & Processes, March, 2002 by Bejbl, Jerome
A hard, thin, dense chrome coating with a micronodular surface texture has been developed to protect a wide range of tools and components. Known as TDC (thin dense chrome), the coating is applied in a chemical bath by means of a proprietary process. TDC has a hardness of 78 HRC; another coating, known as XADC, features the inclusion of synthetic nano-diamond to the TDC bath, resulting in hardness of 98 HRC.
This article describes the coatings, including their properties and their applications. Thin dense chrome When TDC was first introduced in 1957, the coating provided 72 HRC as-applied. Two years ago, the company embarked on a series of experiments to improve this property, with the result that hardness has now reached 78 HRC. However, it has the same...
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