A method compacts an anti-corrosive paint having metal particles of a mechanical part such as a turbine engine part. The mechanical part extends along a longitudinal axis X and has a radially outer surface covered with a first layer of anti-corrosive paint. The method includes at least one step of generating a laser beam on the first layer of anti-corrosive paint to bring the metal particles into contact and to render the anti-corrosive paint electrically conductive.

A method compacts an anti-corrosive paint having metal particles of a mechanical part such as a turbine engine part. The mechanical part extends along a longitudinal axis X and has a radially outer surface covered with a first layer of anti-corrosive paint. The method includes at least one step of generating a laser beam on the first layer of anti-corrosive paint to bring the metal particles into contact and to render the anti-corrosive paint electrically conductive.

A method for forming a multilayer coating film, comprising sequentially applying a first colored paint (X), a second colored paint (Y), and a clear paint (Z) to a substrate, and heating the three layers of the obtained multilayer coating film separately or simultaneously to cure these layers. The first colored coating film has a lightness L* within the range of 30 to 60, the second colored coating film has a light transmittance at a wavelength of 400 nm or more and 700 nm or less within the range of 15% or more and less than 30%, and |h(X)−h(S)|, which is a difference between a hue angle h in the L*C*h color space diagram of the first colored coating film (h(X)) and a hue angle h in the L*C*h color space diagram of the multilayer coating film (h(S)), is within the range of 0 to 30.

Hexavalent chromium-free slurry formulations which are suitable in the production of ceramic overlay coating systems are described. The formulations provide superior hot corrosion and heat oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO.sub.4 higher than about 1:3 with the incorporation of metal oxide particles. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO.sub.4 higher than about 1:3. Both of the basecoat slurry and the topcoat slurry are hexavalent chromium-free.

Hexavalent chromium-free slurry formulations which are suitable in the production of ceramic overlay coating systems are described. The formulations provide superior hot corrosion and heat oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO.sub.4 higher than about 1:3 with the incorporation of metal oxide particles. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO.sub.4 higher than about 1:3. Both of the basecoat slurry and the topcoat slurry are hexavalent chromium-free.

Disclosed is a composite coating for eliminating pollution by chromium and VOCs from a source, the coating comprising a conversion film layer and a coating surface layer. The conversion film layer is made of a surface pretreatment liquid, and the surface pretreatment liquid comprises the following components: an organic compound A having an aromatic ring and at least two phenolic hydroxyl groups in the molecule thereof, or a hydrate thereof; an ionic compound B containing zirconium and/or titanium and fluorine; a mixed solution C containing manganese fluoride; and an inorganic salt D containing potassium ions or sodium ions. The coating surface layer is an FEVE-type fluorocarbon powder coating layer. Also disclosed is a preparation method for the described composite coating.

Disclosed is a composite coating for eliminating pollution by chromium and VOCs from a source, the coating comprising a conversion film layer and a coating surface layer. The conversion film layer is made of a surface pretreatment liquid, and the surface pretreatment liquid comprises the following components: an organic compound A having an aromatic ring and at least two phenolic hydroxyl groups in the molecule thereof, or a hydrate thereof; an ionic compound B containing zirconium and/or titanium and fluorine; a mixed solution C containing manganese fluoride; and an inorganic salt D containing potassium ions or sodium ions. The coating surface layer is an FEVE-type fluorocarbon powder coating layer. Also disclosed is a preparation method for the described composite coating.

A coating film is provided on the surface of a car body of an automobile and includes a plurality of protruding portions extending from the front toward the rear along the car body.

The present invention relates to a peelable coating film having silica particles fixed to a surface thereof, a coating material for hydrophilic-coating-film formation which includes colloidal silica, an alkali metal silicate, and an aqueous medium, and a coating-material set including the coating material for hydrophilic-coating-film formation and a coating material for peelable-coating-film formation including an aqueous dispersion type resin composition.

Provided is an aqueous coating composition which has excellent storage stability and whereby high coating film performance in terms of hardness, water resistance, etc., can be exhibited even when the aqueous coating composition is cured at a relatively low temperature. Disclosed is an aqueous coating composition which contains (A) a resin containing hydroxyl groups and carboxyl groups, (B) a blocked polyisocyanate compound, (C) a phosphate-group-containing compound, and (D) a basic compound, and which has a pH in the range of 7.0-8.2, wherein the basic compound (D) contains a specific quantity of (D1) a basic compound which has an acid dissociation constant (PKa) in the range of 7.0-8.5 and a boiling point in the range of 100-200° C.