Hardide CVD Coating as Hard Chrome Plating Replacement

Paper presented at Valve World 2010

Dr Yuri Zhuk, technical director of Hardide Coatings presented a paper at Valve World 2010 on Wednesday 1 December on the development of Hardide-A CVD coating as a replacement to hard chrome plating for the flow control industry.

Hard chromium electroplating has long been a trusted industry solution used to extend the life of valves that control the flow of abrasive, erosive and corrosive fluids and gases. However, it is an environmentally unfriendly process that is subject to increasing legislative restrictions in Europe and the United States, which are reducing the availability and increasing the cost of hard chrome.

Hardide-A has been developed and proven as an attractive replacement for hard chrome plating. It matches the standard thickness and hardness of hard chrome and outperforms the material in several key properties including enhanced protection against corrosion, wear and chemically aggressive media. The replacement process is easy as no dimensional changes or drawing re-design is necessary. It is applied by CVD (chemical vapour deposition) which enables the coating of internal surfaces and complex shapes where other coatings such as HVOF, D-gun and PVD cannot be
used. No grinding or other expensive finishing operations are required due to the smooth and uniform ‘as coated’ surface. It is easily applied to a wide range of metals including various grades of stainless steel, tool and alloy steels, nickel, cobalt and copper-based alloys, titanium and stellite.

Dr Zhuk commented: “Hardide-A is a technically comparable and better performing alternative to hard
chrome plating. It is a clean and innovative technology that can offer a commercial solution to valve manufacturers and end users. Valve World 2010 is the ideal platform to present the technology to flow control technologists and decision makers from around the world.”

Hardide Coatings, Tel: 01869 353830
Website: www.hardide.com
www.valveworldexpo.com

Published: 31st March 2011