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Method for preparing VCI double-metal composite coating

A composite coating and bimetal technology, used in anti-corrosion coatings, coatings and other directions, can solve the problems of high energy consumption, electrolyte solution pollution, and difficult to handle in the anodizing process, and achieves inhibition of the formation of white zinc oxide, easy pretreatment, The effect of addressing harm to the environment

Inactive Publication Date: 2014-12-10
JIANGSU XIN AN NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many ways to prevent metal corrosion. The metal protection methods currently used can be divided into three categories: one is anodic oxidation treatment, that is, an anodic oxidation film of tens of microns is formed on the metal surface, but due to the large energy consumption of the anodic oxidation process , and the electrolyte solution is seriously polluted and difficult to handle, which limits its application; the second type is chemical conversion film, that is, metal parts are soaked in a solution of a certain composition, and a layer of chemical conversion film is formed by chemical reaction at a certain temperature , now the most widely used is chromate chemical oxidation, but chromate is a carcinogenic toxic substance, the World Environmental Protection Organization has restricted the use of chromate and other chromate-containing compounds; the third category is organic coatings , which is to apply an organic coating on the metal surface to improve the appearance and physical and chemical properties of the metal

Method used

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  • Method for preparing VCI double-metal composite coating
  • Method for preparing VCI double-metal composite coating
  • Method for preparing VCI double-metal composite coating

Examples

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Effect test

Embodiment 1

[0032] This embodiment provides a preparation method of a VCI bimetallic composite coating, the VCI bimetallic composite coating comprises the following components by mass percentage: moisture-curing silicone resin: 35%, aluminum powder: 35%, zinc powder: 28%, Ethanol: 2% The preparation method of this VCI bimetal composite coating specifically comprises the following steps:

[0033] (1) Take 35% of the moisture-curing silicone resin and 2% of ethanol according to the mass percentage and put it into the dispersion tank for stirring, the stirring speed is 450 rpm, and stir for 25 minutes to obtain a uniform premix;

[0034] (2) Take 35% of aluminum powder by mass percentage and add it to the premix prepared in step (1) under stirring, then add 28% of zinc powder, adjust the rotating speed to 500 rpm, stir for 40min, and control the dispersion cylinder The temperature is 30°C, the detected viscosity is 100s, the solid content is 70%, and the VCI bimetallic composite coating is p...

Embodiment 2

[0040] This embodiment provides a preparation method of a VCI bimetallic composite coating, the VCI bimetallic composite coating comprises the following components by mass percentage: moisture-curing silicone resin: 21%, aluminum powder: 45%, zinc powder: 30%, Butanol: 4% The preparation method of this VCI bimetallic composite coating specifically comprises the following steps:

[0041] (1) Take 21% of the moisture-curing silicone resin and 4% of n-butanol according to the mass percentage and put it into the dispersion tank for stirring, the stirring speed is 400 rpm, and stir for 20 minutes to obtain a uniform premix;

[0042] (2) Take 45% of aluminum powder by mass percentage and add it to the premix prepared in step (1) under stirring, then add 30% of zinc powder, adjust the rotating speed to 550 rpm, stir for 25min, and control the dispersion cylinder The temperature is 25°C, the detected viscosity is 95s, the solid content is 75%, and the VCI bimetallic composite coating ...

Embodiment 3

[0047] This embodiment provides a kind of preparation method of VCI bimetallic composite coating, and this VCI bimetallic composite coating comprises the following components by mass percentage: Moisture-curing silicone resin: 36%, aluminum powder: 36%, zinc powder: 25%, Ethanol: 3% The preparation method of this VCI bimetal composite coating specifically comprises the following steps:

[0048] (1) Take 36% of the moisture-curing silicone resin and 3% of ethanol according to the mass percentage and put them into the dispersion tank for stirring, the stirring speed is 500 rpm, and stir for 30 minutes to obtain a uniform premix;

[0049] (2) Take 36% of aluminum powder according to the mass percentage and add it to the premix prepared in step (1) under stirring, then add 25% of zinc powder, adjust the rotating speed to 600 rpm, stir for 50min, and control the dispersion cylinder The temperature is 35°C, the detected viscosity is 105s, the solid content is 79%, and the VCI bimeta...

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Abstract

The invention discloses a method for preparing a VCI double-metal composite coating. The VCI double-metal composite coating comprises the following components: a grafted organic silicon resin, aluminum powder, zinc powder and aids. The preparation method comprises the following steps: adding the grafted organic silicon resin and the aids into a dispersing vat, stirring to prepare a premix; and adding the aluminum powder and zinc powder, stirring, standing, thereby obtaining the VCI double-metal composite coating. The invention also discloses a preparation method of the VCI double-metal composite coating. The VCI double-metal composite coating consists of a composition A and a composition B, wherein the composition A and the composition B are mixed to prepare the VCI double-metal composite coating. The preparation method is simple and feasible to operate, and the preparation process is environment-friendly, low in consumption and low in cost. The composite coating prepared by the method has the advantages of good mechanical property, good adhesion force, high impact resistance, high hardness, high flexibility, good chemical performance, high-temperature resistance, high flame retardant property and high corrosion resistance and can well protect metal.

Description

technical field [0001] The invention belongs to the field of coatings, and relates to a preparation method of coatings, in particular to a preparation method of VCI bimetallic composite coatings. Background technique [0002] Buildings and frames made of steel and other metals are exposed to the atmospheric environment for a long time, and they have been subjected to corrosion of the metal surface by atmospheric water vapor, oxygen and wind for a long time. The metal itself will inevitably rust, especially in some local atmospheres containing hydrogen sulfide and sulfur dioxide. In the environment of acid gas, etc., coupled with the mixing effect of water vapor in the atmosphere, the corrosion of metal components is aggravated. Metal corrosion will greatly shorten the service life of metal components, and in severe cases, it will fall off in pieces, affecting its self-generated strength and causing collapse, endangering safety. [0003] In order to prevent the occurrence an...

Claims

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Application Information

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IPC IPC(8): C09D183/00C09D5/10C09D7/12
Inventor 杨松林吴福娣陈晓兵
Owner JIANGSU XIN AN NEW MATERIALS TECH
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