Process for post Rinse a conversion coating on a metal substrate to improve the corrosion Resistance of sameWe also apply directly or after one or more additional Protective layers on the conversion Coating after Post Rinse.

摘要

A process for post-rinsing a conversion coating on a metal substrate in order to improve the corrosion resistance thereof, either directly or after applying one or more additional protective layers on said conversion coating after post-rinsing. , which comprises a step of contacting the coating for at least 1 second with a liquid post-rinse composition comprising water and: (A) a fluorometalate anion component, each of which comprises (i) at least four fluorine atoms; (ii) at least one atom of an element selected from the group consisting of titanium, zirconium, hafnium, silicone,a. Aluminum, boron and optional, the following (III) one or two electrolytic hydrogen atoms of apricot; and (IV) at least one oxygen atom; and (b) ionomer or tetravalent electronic anode assembly composed of cobalt, magnesium, manganese, zinc, nickel, pond, copper, zirconium, iron and strontium; (c) Inorganic moral components containing phosphoric acid and / or phosphoric acid anions;And (d) organic polymer components and / or polymer resins soluble in and / or dispersed in water. The pH value of the liquid post rinse compound is 2.3-6.0, containing water, and: (a) the minimum concentration is about 0.0010 M / kg of component (a); (b) the component concentration (b) so, measured in M / kg, is related to the component concentration (a),Measured in M / kg, the oscile is about 0.20:1.0 to 3:1.0; (c) the concentration of components (c) is statistically equivalent to the concentration of at least 0.0015 M / kg de phosphate atom, When the concentration of the phosphate atom is related to the concentration of the components (a);Measured in the same unit, about 0.12:1.0 and 5.0:1.0; and (d) a component solid concentration (d) maintains a relationship with a component concentration (a)