Based on successful developments in the field of high-speed flame spraying (HVOF) equipment, HVOF spray materials (powder), and HVOF process technology, this paper describes the increasing use of HVOF as a replacement for hard chrome plating. It presents the results of laboratory and operational evaluations of the HVOF-sprayed coatings as a replacement for hard chrome in the aviation industry. Paper includes a German-language abstract.

High-velocity oxyfuel (HVOF) spraying is a viable alternative for hard chrome plating because of its excellent coating properties and substantially lower environmental pollution. Initial applications in ball valves, journals, and hydraulic cylinders on earthmoving equipment have proven successful. This paper discusses the advantages and disadvantages of HVOF spraying as an alternative to hard chrome plating for aircraft components and presents some of the early results of laboratory and in-service testing.