Inventors:
James R. Quartarone - Newport RI
Kenneth E. Barthelemy - Hope RI
William M. Cicchelli - Saunderstown RI
George V. Morris - East Providence RI
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
D05D 302
Abstract:
A process is provided for coating a given surface of a heat sensitive metal article (e. g. , thermally massive aluminum) with a high-cure-temperatureating-forming-powder. A first oven heating step elevates the metal article's temperature to a predetermined preheat cycle high-limit-of-heat-load-temperature. After a first predetermined period of time, the metal alloy article is withdrawn from the oven. A high-cure-temperature-coating-forming-powder is then sprayed onto the given surface of the metal article. The spraying, comprising first and second spray sequences, is initiated essentially immediately after withdrawal of the metal article from the oven. The first spray sequence is a single group of spray passes that applies a coating layer to fill the pores in the given surface with heat melted high-cure-temperature-coating-forming-powder. The second spray sequence builds up the total thickness of coating. A second oven heating step elevates the metal article's temperature to a predetermined cure cycle high-limit-of-heat-load-temperature for a second predetermined period of time.