Production process of aqueous high corrosion resistance zinc chrome coating

Abstract

The invention relates to a production process for water-basedhigh corrosion resistant zinc chrome paint. The paint comprises the following three compositions of a composition 1, a composition 2 and a composition 3, wherein the composition 1 is prepared from zinc stearate, No. 200 solvent oil, NP4, polyoxyethylene nonyl phenyl ether, dipropylene glycol, silane coupler, zinc dust and aluminum powder according to the feeding sequence, during the preparing processes, the raw materials are fed into a kneader in turn for agitating and discharging; the component 2 is prepared by the following steps: firstly, adding redistilled water or deionized water into a stirring kettle, then adding chromic acid, boric acid and zinc oxide in turn into the stirring kettle for agitating and discharging; and the component 3 is hydroxyethyl cellulose. With the invention, no resin is added into the paint; furthermore, the silane coupler is added in the paint, and thus non-resin and noncrystalline organic chromium and organic boron are formed in a coating to firmly adhere zinc-aluminum pieces and an iron base together as a film forming material and an adhesion agent, thereby improving adhesive power, cohesive force and the binding force between two coatings. Simultaneously, the paint does not contain cobalt nitrate and has a low cost. In addition, hydraulic pressure is used for discharging and rinsing, thereby preventing accumulation and blockage in an extraction pipe cavity.

Description

technical field [0001] The invention relates to a production process of a coating, in particular to a production process of a water-based high-corrosion-resistant zinc-chromium coating, which belongs to the technical field of coating production. Background technique [0002] Dacromet (DACROMET), named zinc-chromium coating in China, is a new type of corrosion-resistant coating. Compared with traditional electro-galvanizing: zinc-chromium coating has extremely strong corrosion resistance, which is 7-10 times that of galvanizing. Double, no hydrogen embrittlement, especially suitable for high-strength stressed parts, high heat resistance, heat resistance temperature 300 ℃, especially suitable for high-strength components of automobile and motorcycle engine parts, with high permeability, high adhesion, high Wear reduction, high weather resistance, high chemical resistance stability, non-polluting. Dacromet technology base material range: iron and steel products and non-ferrous...

AI Technical Summary

Problems solved by technology

However, since no silane coupling agent is added in production at present, these fatty acid salts have no active reactive functional groups, and their resistance is always poor, which makes the coating use the cohesion of the engineering coating and the interlayer bonding of the second coating. power is not high

[0006] At the same time, the foreign Dacromet paint contains expensive cobalt nitrate, and the cost is very high

During the production process, the discharge lumen is easy to accumulate and block, resulting in the shutdown of the production line and waste of production materials