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US 7,105,472 B2Granted
Coating solution for metals and metal alloys
OwnerWalter Zepfinventor
Life of this patent
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Abstract
The present invention relates to a coating solution to be applied on the surface of metals or metal alloys, a process for cold forming of metals and metal alloys using said coating solution, and a coated blank made of a metal or a metal alloy.
Claims28
A coating solution to be applied on a surface of metals or metal alloys, comprising a polyphosphate, a dithiocarbamate, graphite and molybdenum disulfide.
A process for cold forming of metals or metal alloys, comprising the steps of:
- (a) immersing a blank of a metal or a metal alloy in a bath comprising a coating solution comprising a polyphosphate, a dithiocarbamate, graphite and molybdenum disulfide, for a time period of from about 30 seconds to about 10 minutes;
- (b) drying said blank having the coating solution on its surface at a temperature ranging from about room temperature to about 80° C.;
- and
- (c) subjecting the thus-coated blank to cold forming.
1 more element
A blank comprising a coating obtainable by
- (a) immersing a blank of a metal or a metal alloy in a bath comprising a coating solution comprising a polyphosphate, a dithiocarbamate, graphite and molybdenum disulfide, for a time period of from about 30 seconds to about 10 minutes;
- and
- (b) drying said blank having the coating solution on its surface at a temperature ranging from about room temperature to about 80° C., resulting in a coated blank.
Dependencies are inferred from the claim text.