Zinc-nickel seeping layer ferrous metal corrosion protection process

Abstract

The invention discloses a process for resisting ferrous metal corrosion of a zinc nickel diffusion layer. The process comprises the steps of alkaline degreasing, shot blasting, heating diffusion layer, water washing dust removal and colorful closing according to the requirement of a customer, wherein in the heating diffusion layer step, the zinc nickel diffusion layer and a metal matrix are put in a sealed metallic container and heated; the zinc nickel diffusion layer is prepared by evenly mixing the following powders in mass proportion: 20 to 30 percent of Zn powder, 0.5 to 1.4 percent of Ni powder, 3 to 12 percent of Al powder, 2 to 6 percent of rare earth, 1 to 4 percent of NH4Cl ammonium chloride, the balance being Al2O3 powder. The diffusion layer has the advantages of high rigidity, good wear resistance, unchangeableness of original mechanical performances of products, high adhesion strength, bumping and rolling resistance, good solderability, moisture and heat resistance and acid and alkali resistance; the diffusion layer has uniform thickness and compactness, and appearances of finished products have good uniformity; and no three-waste emission occurs during the course of processing, so the process belongs to the clean production process and is environment-friendly.

Description

technical field [0001] The invention relates to an anticorrosion technology specially for ferrous metals, in particular to a metal anticorrosion process for forming a zinc-nickel infiltrated layer on the surface of ferrous metals. Background technique [0002] Metal anti-corrosion technology is mainly to form a protective layer through special treatment on the surface of the object, so as to slow down the damage or deterioration of the object under the action of various corrosive substances or environments, so as to prolong the service life of the object the goal of. Common metal anti-corrosion technologies mainly include electro-galvanizing, hot-dip galvanizing, carbonitriding and dacromet, etc. These treatment technologies have their own advantages and disadvantages, and some will pollute the environment during the treatment process, such as electro-galvanizing and hot-dip galvanizing processes ; Some treatment processes have high energy consumption and high cost, and wil...

AI Technical Summary

Problems solved by technology

Common metal anti-corrosion technologies mainly include electro-galvanizing, hot-dip galvanizing, carbonitriding and dacromet, etc. These treatment technologies have their own advantages and disadvantages, and some will pollute the environment during the treatment process, such as electro-galvanizing and hot-dip galvanizing processes ; Some treatment processes have high energy consumption and high cost, and will affect the mechanical properties of the substrate at the same time, such as hot-dip galvanizing and carbonitriding processes; 2 Poor performance, relatively low hardness, such as electro-galvanized and hot-dip galvanized processes

Dacromet treatment technology is a relatively good one of the above methods, but it has low hardness, poor wear resistance, and anti-SO 2 Poor performance and other deficiencies, over a long period of time, under constant friction and impact, it is easy to damage