TH546A - Silicate coating method provides a substrate that has already been coated. - Google Patents

Abstract

Now, various metals, especially ferrous metals coated to resist corrosion with coatings containing metal particles and hexavalent chromium additives, can now be made. Increased resistance to corrosion Including heat resistance by using a silica-type coating over the surface. It also results in resistance to damage, together with better resistance to outdoor weather. Without losing any other characteristics Such as adhesion of coatings, etc.

Claims (4)

1. Metal substrate protected with a combination of primer / top coatings. Without resin And contains metal particles With the condition that only the base coatings contain Metal particles while coating All included without resin Each coating is made from a compound that cures it to form a water-resistant protective coating. In a manner that is a mixture of relatively - without resin Which contains the following substances: in a liquid medium is a substance that produces hexavelent chromium Combined with metal particles in sufficient quantities to obtain coated substrate metal particles above 108 mg / m 2 after curing, but not more than 53,821 mg / m of coated substrate. And the above coating is virtually resin-free. And a silica-containing substance in a liquid medium Where there is an adequate amount of substances containing silica To obtain a silica-type coating in the cured coating of more than approximately 538 mg per square meter of the coated substrate. 1, which is characterized by the said primer, is the first coat on the surface of the substrate 3. The coated metal substrate of the claim that 1, which is characterized by the liquid medium of the said primer. 4. The coated metal substrate of claim 3, the medium for the liquid applied to the primer consists of: Water combined with organic liquids having a high boiling point. 5. Coated metal support of the disclaimer. 1 where the primer is obtained from a mixture that can be cured to be a heat-treated coating; 5, where the primer was obtained after heating above 176.67 ° C (350 ° F) and the coating was obtained after heating at temperatures ranging from approximately 93.3 ° C (200 ° C). FH) to approximately 537.78 ° C (1000 ° F). 7. Coated metal substrate of the claim that 1 where at least part of the metal particles in the primer are in the form of flake. 8. The coated metal substrate of the claim that 1 which such primer coating contains not more than approximate chromium 5382 mg / m2 of the coated substrate, with the coating weight ratio of chromium. When attached as a chromium metal to metal particles no higher than approximately 0.5: 1 9. Coated metal support of the claim that 1 The aforementioned coating substrate having no higher than 21529 milligrams per square meter of the aforementioned silica substrate 1 0. Method for preparing metal substrate to be coated. To resist corrosion Which is protected by a primer / primer / combined coating with metal particles, where only the primer part contains such metal particles. The method consists of using the following substances as a primer coating. Mixtures are virtually resin-free and can be thermally cured as a coating. This is composed of hexaventured chromium additives with metal particles in a liquid medium and is contained in sufficient quantities to provide a sufficient amount of metal particles in the sump coating above 108 but not higher. 53821 mg per square meter of the coated substrate and the following coating application as a top coat on the substrate. Is that the overcoating compound is a virtually resin-free compound curing to be a water resistant protective coating And contains silica-type agents in a liquid medium, the coating is sufficient to provide approximately 538 mg / sq m of higher silica substrate of the coated substrate. 1. Method of claim 10 in which the said base coat is cured prior to being applied over the top coat 1 2. Method of claim 10 in which the said primer coats are by heating as a dry and water resistant primer. And there is a coating of the coating on the surface after that without cooling as an intermediate step 1. 3. In the preparation of metal substrate to resist corrosion. Which is protected by a mixture of primer coatings / coatings on the surface Finely ground metal Where only the primer coat contains finely ground metal And where the substrate contains the following substances: a primer, a virtually resin-free coating made from a heat-cured compound. Which contains hexavalent chromium And Dong said coatings contain fine powdered metals higher than 108 but not higher than 53821. Milligrams per square meter of coated substrate And not higher than about 5382 milligrams per square meter of chromium of the coated substrate. Where the coating consisted of the ratio of chromium as the chromium metal to the fine powder of the metal not higher than approximately 0.5: 1, the improvement consisted of (a) the use of the following substances as a coating on the substrate. Then such is A virtually resin-free silica blend that cures to form a water-resistant protective coating. And consisted of approximately 0.5 to approximately 50 percent of solids by weight In a liquid medium, a sufficient amount of such coating is used to provide approximately 538 to approximately 21529 mg / sq m of silica-resistant coatings, and (b) the curing of the coating mixture is provided. It is a protective coating that resists water 1 4. Method of claim 13 where the above coating is cured at temperatures within the range from approximately 93.3 ° C to approximately 537.78 ° C.