Diffusion zincizing coating method

Abstract

The invention relates to a diffusion zincizing coating method and belongs to the technical field of surface coating techniques of steel materials. The method comprises the steps of precoating the surface of a steel product with a zinc deposition layer according to a traditional mechanical zinc coating method, burying the steel product in anti-oxidation filling and putting in a diffusion coating furnace or an incubator, or applying an anti-oxidation coating on a workpiece with a pre-coated zinc layer, drying and putting in the diffusion coating furnace or the incubator for heat preservation, and allowing zinc iron atoms to diffuse mutually to form a diffusion zincizing layer with a zinc-iron alloy structure. With the adoption of the method, diffusion zincizing uncoating caused by pretreatment and reoxidation can be avoided basically, the quality of the diffusion zincizing layer is ensured, and the yield of a product is greatly improved.

Description

technical field

[0001] The invention relates to a method for diffusing galvanized coating, which belongs to the technical field of surface coating technology of iron and steel materials. Background technique

[0002] About one-tenth of the world's steel output is lost to corrosion and rust, and the economic losses caused to my country are at least 40 billion yuan per year, especially in environmental conditions such as outdoor exposure, marine atmosphere, and industrial atmosphere, such as road facilities, water conservancy, Components and parts of chemical industry, marine, metallurgy, power generation, automobile and construction machinery, etc. Therefore, corrosion protection of steel components and products is one of the important measures for the stable operation of engineering construction and equipment manufacturing. Forming a diffusion zinc layer on the surface of steel parts and products is an effective protective measure for the steel surface, because the diffusion ...