This paper describes a new composite coating technology developed for hot dip galvanizing rolls used in automotive manufacturing. The multilayer coating consists of HVOF sprayed WC and electroless Ni-P plating. Coating surfaces and cross-sections are examined and adhesion strength, friction, and wear resistance are measured. In addition, changes in surface roughness are recorded on galvanizing rolls after three months of service.

electroless plating, HVOF spraying, surface roughness, WC-NiP composite coatings, zinc adhesion, zinc dross
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2014
DVS Media GmbH
Topics
Hot-dip galvanizing Electroless plating High-velocity oxyfuel spray coating Surface roughness Tungsten carbide cermets Zinc
Issue Section:
Automotive Applications
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