A high-temperature resistant peelable anti-corrosion coating, a preparation method therefor and an application thereof are provided. The coating includes component A and component B; the component A includes film-forming substance, pigment and filler, auxiliary agent, and solvent A; the component B includes vulcanizing agent and solvent B; the component A includes the following components in parts by weight: 100 parts of film-forming substance; 25-55 parts of pigment and filler; 0.1-3 parts of adhesion modifier; 0.5-5 parts of auxiliary agent; 20-50 parts of solvent A; the component B includes the following components in parts by weight: 10-50 parts of vulcanizing agent; 100 parts of solvent B. The coating can be completely peeled off from the substrate after being subjected to a high temperature of 200 C. for 4 hours, without affecting the state of the substrate.

A coated steel sheet comprises: a steel sheet; a primer coating film which is arranged on the steel sheet and comprises an anti-corrosive pigment and an aggregate composed of primary particles; and a top coating film which is arranged on the primer coating film. The anti-corrosive pigment comprises at least one compound selected from the group consisting of a bivalent tin salt, a trivalent vanadium salt, a tetravalent vanadium salt, a tetravalent molybdenum salt, an oxycarboxylic acid salt, an ascorbic acid, a phosphorous acid salt and a hypophosphorous acid salt.

A method for producing a glass-like protective layer on an optionally pre-coated metal or glass substrate. The method comprises: (a) mixing one or more defined silicon compounds with NaOH and KOH, (b) adding water to the mixture obtained in (a) to hydrolyze the silicon compound(s), (c) adding at least one defined compound of formula MY.sub.m, where M is Pb, Ti, Zr, Al or B, to the hydrolyzed mixture obtained in (b), wherein the molar ratio M/Si is from 0.01/1 to 0.04/1, to obtain a coating sol, (d) applying the coating sol obtained in (c) to the substrate, and (e) thermal densification of the coating sol applied in d) at a temperature of from 300 C. to 500 C. to form the glass-like protective layer.

A semi-organic insulation coating includes an inorganic component and an organic resin, a Zr compound and an Si compound contains a plate-like silica as an inorganic component and are included in a ratio in a dry coating of 20 to 70 mass % of Zr compound (converted to ZrO.sub.2) and 10 to 50 mass % of Si compound containing plate-like silica (converted to SiO.sub.2), and the remainder is substantially an organic resin, whereby a magnetic steel sheet with a semi-organic insulation coating has no deterioration of corrosion resistance and water resistance without containing a chromium compound and being excellent in powdering resistance, scratch resistance, sticking resistance, TIG weldability, punchability and coating appearance.

This invention relates to galvanic aluminum alloy powder-pigments coated with semi-conducting corrosion-inhibiting compositions and particularly to the process for preparing said coated powder-pigments for coating substrates to inhibit corrosion. The coated aluminum alloy powder-pigments are electrically active and prevent corrosion of metals which are more cathodic (electropositive) than the coated-aluminum alloy pigments.

This invention relates to a protection coating composition, which comprises a) at least one resin, the resin being selected from a group consisting of polyurethane resin (A), polyurethane-acrylic resin(B), b) a solvent, c) a bi-functional epoxy resin precursor (C), the bi-functional epoxy resin precursor (C) being represented by the following formulas: R.sub.1Y[CH.sub.2CH(OH)R.sub.3CH(OH)CH.sub.2XR.sub.4X].sub.nR.sub.2. This invention also provides a method for treating metallic surface by using the protection coating composition, an article which has at least one portion that comprises side treated surface by the protection coating composition, which demonstrates improved corrosion resistance, adhesion properties and anti-aging adhesion properties.

A coating agent for forming an electrically conductive coating on a substrate, the coating agent including expanded graphite and a binder, and the ratio Q.sub.B of the mass of the expanded graphite contained in the coating agent to the residual dry mass of the coating agent being at least 0.25.

There is provided a corrosion-resistant member in which a corrosion-resistant coating film is less likely to peel off from a base material even when the corrosion-resistant member is subjected to a thermal history. The corrosion-resistant member includes: a base material (10) containing aluminum or an aluminum alloy; and a corrosion-resistant coating film (20) formed on the surface of the base material (10), in which the corrosion-resistant coating film (20) contains aluminum fluoride hydroxide AlF.sub.3-x(OH).sub.x in which a space group belongs to R-3c, and x in the chemical formula is 0.05 or more and 1.00 or less.

A high-temperature resistant peelable anti-corrosion coating, a preparation method therefor and an application thereof are provided. The coating includes component A and component B; the component A includes film-forming substance, pigment and filler, auxiliary agent, and solvent A; the component B includes vulcanizing agent and solvent B; the component A includes the following components in parts by weight: 100 parts of film-forming substance; 25-55 parts of pigment and filler; 0.1-3 parts of adhesion modifier; 0.5-5 parts of auxiliary agent; 20-50 parts of solvent A; the component B includes the following components in parts by weight: 10-50 parts of vulcanizing agent; 100 parts of solvent B. The coating can be completely peeled off from the substrate after being subjected to a high temperature of 200 C. for 4 hours, without affecting the state of the substrate.

The present invention is directed towards curable film-forming coating compositions comprising metal particles; an alkaline earth metal compound comprising an alkaline earth metal oxide, an alkaline earth metal carbonate, an alkaline earth metal hydroxide, an alkaline earth metal sulfate, an alkaline earth metal monocarboxylate, an alkaline earth metal phosphate, or combinations thereof; and an organic film-forming binder. Also disclosed are methods of making curable film-forming coating compositions, methods of coating substrates, and coated substrates resulting therefrom.