Metal surface anti-corrosion layer structure and coating method thereof

Abstract

The invention provides a metal surface anti-corrosion layer structure and a coating method thereof. The anti-corrosion layer structure comprises a priming paint layer of 40-80 mu m, an intermediate paint layer of 50-100 mu m and a surface paint layer of 40-80 mu m, wherein, the priming paint layer is formed by coating object system paint on epoxy-polyamide, the intermediate paint layer is formed by coating object system paint on heavy-sizing epoxy-polyamide, and the surface paint layer formed by coating acrylic acid polyurethane system paint. The coating method comprises coating the priming paint layer on the metal surface; coating the intermediate paint layer on the priming paint layer; and coating the surface paint layer on the intermediate paint layer. The metal surface anti-corrosion layer structure in the embodiment of the invention has good anti-corrosion performance, ageing resistance and mechanical performance, simple technique, low cost which is lower than that of commonly used powdery paints at present, and no heavy metals, which is environment-friendly.

Description

technical field The invention relates to a structure of an anticorrosion layer on a metal surface and a coating method thereof, in particular to a structure of an anticorrosion layer on the surface of electrical equipment on an offshore aluminum alloy substrate and a coating method thereof. Background technique In recent years, marine development has received widespread attention. Various marine transportation vehicles, various ships and various offshore production facilities are all made of metal. Some of these costly and considerable amount of metal structures are in the marine atmosphere area of ​​wind, fog, rain, and sun all year round, some are in the splash area of ​​tides and waves that repeatedly appear for many years, and some are in the splash area of ​​waves for many years. Flowing seawater immersion scrubbing is in the full immersion area of ​​sea mud containing bacteria. In such a harsh marine environment, the corrosion rate of metals is much greater than that ...

AI Technical Summary

Problems solved by technology

The purpose of the embodiments of the present invention is to provide a metal surface anti-corrosion layer structure, which aims to solve the problems of poor corrosion resistance, insufficient thickness, and short effective period of weather resistance and ultraviolet resistance of the existing metal surface coating