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Chromium-free Dyclo paint

A coating and weight ratio technology, applied in anti-corrosion coatings, coatings, devices for coating liquids on surfaces, etc., can solve problems such as increasing coating costs, decreasing coating weather resistance and corrosion resistance, and eliminating internal stress. , low price, high adhesion effect

Inactive Publication Date: 2010-02-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two coatings eliminate the chromium in the traditional Dacromet, but the weather resistance and corrosion resistance of the coating are reduced compared with the traditional Dacromet, and must be used in conjunction with another layer of organic sealing coating, greatly Increased coating cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Component A is composed of 500 grams of zinc powder, 4000 grams of deionized water and 10 grams of polyoxyethylene lauryl ether; Component B is composed of 40 grams of aluminum hydroxide, 60 milliliters of 85% phosphoric acid, and 12 grams of methyl cellulose ether; 50 35wt% hydrogen peroxide, 8 grams of zinc oxide, and 17 grams of polyethylene glycol form the C component. First mix component B and component C and stir for 30 minutes, then add component A and continue stirring until the system is uniform and adjust the pH to 3.5.

[0040] After the neutral carbon steel test piece is derusted and degreased, dip-coat the paint, dry it with a dryer, preheat it in a preheating furnace at 80°C for 20 minutes, then raise the temperature to 300°C for 30 minutes, and take it out to cool in air.

Embodiment 2

[0042] 300 grams of zinc powder and 200 grams of scaly aluminum powder, 5000 grams of deionized water, 12 grams of cetyl alcohol polyoxyethylene ether to form component A; 40 grams of aluminum hydroxide and 69 ml of 85% phosphoric acid, 12 grams of hydroxypropyl fiber Plain ether forms component B; 30 grams of 35wt% hydrogen peroxide, 10 grams of potassium permanganate, 5 grams of calcium oxide, and 15 grams of polyethylene glycol form component C. After mixing B and C, stir for a period of time, then add A, stir to make the mixture uniform, and adjust the pH=5.3. The implementation method is the same as that of Example 1.

Embodiment 3

[0044]200 grams of zinc powder and 200 grams of aluminum powder, 4000 grams of deionized water, 16 grams of cetyl alcohol polyoxyethylene ether to form component A; 80 grams of aluminum hydroxide and 100 ml of 85% phosphoric acid, 14 grams of hydroxypropyl cellulose ether 10 grams of sodium tripolyphosphate constitute component B; 50 grams of 35wt% hydrogen peroxide, 6 grams of calcium hydroxide, and 14 grams of polyethylene glycol constitute component C. After mixing B and C, stir for a period of time, then add A, stir to make the mixture uniform, and adjust the pH to 5.3. The implementation method is the same as in Example 1.

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Abstract

The invention relates to a non-chromate Dacromet paint belonging to the metal anticorrosion technical field. The non-chromate Dacromet paint is prepared by the following steps that: after mixing a component B with a component C based on the weight ratio of 3-5:1.5-2.4, mixing the mixture with a component A based on the weight ratio of 1:16-32, stirring evenly and controlling pH value between 3.5 and 5.5; the non-chromate Dacromet paint has the characteristics of non-environmental pollution and non-public nuisance, high permeability, high adhesion, high antifriction, high weatherability, high chemical stability and so on. And the anticorrosion of the non-chromate Dacromet paint improves 7-10 folds of zinc electroplating.

Description

technical field [0001] The invention relates to a chrome-free dacromet coating, which belongs to the technical field of metal anticorrosion. Background technique [0002] Corrosion of steel directly leads to a large number of accidents or hidden dangers of accidents every year, causing huge economic losses and seriously affecting national economic development and security. How to provide durable corrosion resistance has become a research hotspot. The traditional surface treatment adopts galvanizing and hot-dip galvanizing methods, but both of these processes have serious environmental pollution, are not resistant to high temperatures (cracks appear when the temperature is higher than 70°C, and the anti-corrosion performance is greatly reduced), and the corrosion resistance is insufficient. It is not suitable for use in harsh environments. Pre-treatment uses acid to remove rust, which will cause defects such as hydrogen embrittlement and reduced strength of the workpiece. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/08B05D7/14
Inventor 张树永康彪张桃胡冰耿倩
Owner SHANDONG UNIV
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