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HVOF Coating Case Study for Power Plant Process Control Ball Valve Applications

This is a case study of the failure of the coating on an on-off metal-seated ball valve (MSBV) used in supercritical steam lines in a power plant. The valves are exposed to rapid high-pressure and -temperature variations resulting in cracking and cohesive failure of the high velocity oxygen fuel (HVOF) 80/20 Cr3C2-NiCr coating. It was found that carbide precipitation is a major factor causing embrittlement of the coating.

Revision Date:  6/8/2015

Tags:  221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Velan, Valve, Thermal Stress, Journal of Thermal Spray Technology