Polysilazane Anti-corrosion Coating that Can Replace Hot-dip Galvanizing

Abstract

In response to the problems of high energy consumption and pollution and insufficient anti-corrosion performance in the preparation process of hot-dip galvanized anti-corrosion materials, a polysilicon nitride anti-corrosion coating was developed. Using vinyl polysilazane as the base resin and adding zinc powder antirust pigment to the resin, a polysilazane zinc-rich anticorrosion coating was developed. The performance of the coating was characterized, and the results showed that the coating had a hardness of 6 H after heat treatment at 250°C and a salt spray resistance better than that of hot-dip zinc samples. 2000 h of salt spray resistance after heat treatment at 600°C, which is twice that of hot-dip galvanized materials, and the scratches are self-healing. The coating is a good substitute for hot-dip galvanized material.