Patent ID: 9580813
Date: 2017-02-28
CPC Classifications: B05D,C09D,C23C,Y10T

Claim:
1. An article of manufacture comprising a coated metal substrate which has been coated according to a method comprising steps of: a) contacting a metal substrate with a pre-rinse comprising a copper chelating agent, and optionally copper, prior to application of a zirconium-based pretreatment coating composition to the metal substrate; b) applying to the metal substrate a zirconium-based metal pretreatment coating composition comprising dissolved Zr, a source of fluoride, optionally materials comprising one or more of silicon, boron and yttrium and optional added dissolved Cu, thereby forming a pretreatment coating on the metal substrate; wherein the copper chelating agent is present in the pre-rinse in an amount sufficient to control the amount of copper deposited onto the metal substrate by the zirconium-based pretreatment coating composition such that an average total ratio of atomic % of Cu to atomic % of Zr in the pretreatment coating deposited on the metal substrate is in a range of 0.0001 and 1.1.