Waterborne sealing agent for zinc-based micro coating and preparation method of waterborne sealing agent

Abstract

The invention relates to a waterborne sealing agent for a zinc-based micro coating and a preparation method of the waterborne sealing agent. The raw materials of the waterborne sealing agent are composed of the following components in percentage by mass: 2-10% of silane coupling agent, 1-5% of titanate coupling agent, 20-40% of silicate, 3-5% of organic solvent, 0.1-0.5% of C13 carbonyl isomeric alcohol ethoxylate surfactant, 10-30% of fluorocarbon polymer micropowder or fluorocarbon polymer emulsion and the balance of deionized water. The waterborne sealing agent has the characteristics of environment friendliness, safety and capability of improving the adhesive force, hardness, acid and alkaline resistance and high temperature resistance of the zinc-based micro coating and reducing the friction and torque coefficients.

Description

technical field [0001] The invention relates to a water-based sealing agent for zinc-based micro-coatings and a preparation method thereof, belonging to the technical field of post-treatment of metal zinc-based micro-coatings. Background technique [0002] Traditional metals, especially steel, cast iron and their alloys, zinc-based micro-coating treatment processes include electro-galvanizing, Dacromet, and Jiaomet, among which Dacromet and Jiaomet are the main zinc-based micro-coating treatments. host. Dacromet and Jiaomet are the process of forming a flake zinc-based coating on the metal surface by physical and chemical methods. The formed coating is called Dacromet and Jiaomet, also known as zinc-based micro-coating. The purpose is mainly to provide protection for the base metal and prevent the metal from being corroded to a large extent; it can significantly improve the neutral salt spray resistance of the metal. However, the coating is not scratch-resistant, has low h...

AI Technical Summary

Problems solved by technology

However, since organic coatings and zinc-based micro-coatings cannot be combined by chemical bonds, the binding force of the treated coating system needs to be improved.

Secondly, due to the poor high temperature resistance of general organic resins, it is not suitable for use in high temperature applications, so the high temperature resistance of the final zinc-based micro-coating also needs to be improved

Furthermore, because the thickness of the organic coating is thicker, the thickness of the final zinc-based micro-coating is also thicker, which is not suitable for surface treatment of small standard parts such as screws and nuts. The strength, high temperature resistance, and coating thickness need to be improved, and the smell is strong, and there are certain safety hazards

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