Back to results
US 8,394,459 B2Granted
Pre-conversion coating composition
AssigneePPG Industries Ohio, Inc.
InventorsJeffrey L. Stalker, Shan Cheng, Alan J. Kaylo
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a coating composition comprising (i) a corrosion inhibitor and the (ii) reaction product of a calcium compound with an acid compound. The coating composition is deposited onto a substrate prior to the application of a pre-treatment coating composition (conversion coating) onto the substrate. The present invention is also directed to a substrate that comprises a coating system that comprises such a coating composition.
Claims15
A method of coating a substrate comprising:
- (a) applying a first coating composition onto at least a portion of the substrate wherein said first coating composition comprises:
- (i) a corrosion inhibitor comprising organic-modified zinc aluminum molybdenum phosphate hydrate and (ii) the reaction product of a calcium compound with an acid compound comprising a fluoroacid;
- (b) dehydrating at least a portion of the first coating composition to form a first coating layer;
- (c) removing at least a portion of the first coating layer to expose a portion of the substrate;
- (d) optionally, rinsing at least a portion of the substrate exposed in step (c) and/or the first coating layer;
- and
- (e) applying a second coating composition onto at least a portion of the exposed substrate or at least a portion of the first coating layer.
4 more elements
A method of coating a substrate comprising:
- (a) applying a first coating composition onto at least a portion of the substrate wherein said first coating composition comprises:
- (i) a corrosion inhibitor comprising organic-modified zinc aluminum molybdenum phosphate hydrate and (ii) the reaction product of a calcium compound with an acid compound comprising a fluoroacid;
- (b) dehydrating at least a portion of the first coating composition thereby forming a first coating layer;
- (c) optionally, rinsing the substrate;
- and
- (d) applying a second coating composition onto at least a portion of the first coating layer.
3 more elements
Dependencies are inferred from the claim text.