FINISH COAT COMPOSITION FOR CORROSION-RESISTANT COATING OF A METAL PART, WET-ON-WET METHOD FOR APPLYING A FINISH COAT, CORROSION-RESISTANT COATING OF METAL PARTS, AND COATED METAL PART

摘要

The present invention relates to a finishing composition for coating of a metal part previously coated with a corrosion-resistant coating comprising at least a binder of alkylphenylsiloxane type, glass microbeads, and optionally particles of filler with a high thermal resistance and/or particulate aluminium, said composition having a thixotropic index (ITh) greater than or equal to 3. The present invention also relates to a corrosion-resistant coating of a metal part, resistant to acids and bases, contributing to the good thermal resistance of the system and comprising at least two layers that are different from one another, the first layer being a base layer comprising at least water, a particulate metal and a binder, and the second layer being a finishing composition according to the invention. The present invention further relates to the wet-on-wet method for applying the corrosion-resistant coating according to the invention and to a metal substrate coated by a corrosion-resistant coating according to the invention.