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Environment-friendly coating with high corrosion resistance and preparation method thereof

A high-corrosion-resistant, environmentally-friendly coating technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of reduced corrosion resistance, poor closed cells, easy cracking, etc., to improve corrosion resistance, increase surface tension, and firmness enhanced effect

Active Publication Date: 2021-12-31
新纶新能源材料(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in the coating formed by the chromate system corrosion-resistant coating, chromium mainly exists in the form of trivalent chromium and hexavalent chromium, trivalent chromium is the main body, and hexavalent chromium has the function of self-repairing, and the corrosion resistance is the best. However, hexavalent chromium is extremely toxic and carcinogenic, so the use of chromate systems is strictly restricted
The corrosion-resistant coatings of phosphate system, molybdate system, silicate system and rare earth metal salt system are non-toxic and have good environmental friendliness, but compared with chromate system, the closed-cell property of the coating is poor , there is a certain degree of microporosity, and it is easy to crack, and the barrier property to moisture and acidic medium is relatively low, so that the corrosion resistance is greatly reduced

Method used

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  • Environment-friendly coating with high corrosion resistance and preparation method thereof
  • Environment-friendly coating with high corrosion resistance and preparation method thereof
  • Environment-friendly coating with high corrosion resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Inject quantitative pure water into the stirred tank, add 10% methanol in the pure water mass ratio to the pure water to obtain a water-containing methanol solvent, add 2% sodium tripolyphosphate in the solvent mass ratio to the solvent Add the phosphoric acid of 0.2% of the mass ratio of the solvent to the solvent, add sodium hexametaphosphate of 0.5% of the mass of the solvent to the solvent, stir and disperse with the first stirring speed of 100rpm and the first duration of 15min; Nanoscale MnO accounting for 1% by mass of the solvent 2 , stir and disperse with the second stirring speed of 1000rpm and the second duration of 60min; add 0.05% EDTA in the solvent mass ratio to the solvent, and add the nano-scale MnO in the solvent 2 For the acrylic water-based binder with a mass ratio of 5%, add sodium lauryl sulfate accounting for 0.03% of the solvent mass ratio to the solvent, and stir and disperse with the third stirring speed of 100rpm and the third duration of 15mi...

Embodiment 2

[0058] Inject quantitative pure water in the stirred tank, add the methanol that accounts for pure water mass ratio 30% to pure water, obtain the methanol solvent containing water, add the sodium tripolyphosphate that accounts for solvent mass ratio 10% in solvent, to Add 1% phosphoric acid in the solvent mass ratio to the solvent, add 5% sodium lauryl sulfate to the solvent, stir and disperse with the first stirring speed of 300rpm and the first duration of 30min; Add the nanoscale CeO that accounts for solvent mass ratio 8% 2 , stir and disperse with the second stirring speed of 2000rpm and the second duration of 90min; add NTA accounting for 0.3% of the solvent mass ratio in the solvent, and add accounting for nano-scale CeO in the solvent 2 For the polyvinyl alcohol water-based binder with a mass ratio of 20%, add polyoxyethylene alkylphenol ether accounting for 0.3% of the solvent mass ratio to the solvent, and stir and disperse with the third stirring speed of 300rpm and...

Embodiment 3

[0060] Inject quantitative pure water in the stirring tank, add the methanol that accounts for pure water mass ratio 20% to pure water, obtain the methanol solvent containing water, add the sodium tripolyphosphate that accounts for solvent mass ratio 5% in solvent, to Add 0.5% of phosphoric acid in the solvent mass ratio to the solvent, add 3% sodium hexametaphosphate in the solvent mass ratio to the solvent, stir and disperse with the first stirring speed of 200rpm and the first duration of 25min; Nanoscale CeO accounting for 5% by mass of the solvent 2 , stir and disperse with the second stirring speed of 1500rpm and the second duration of 75min; add 0.15% EDTA in the solvent mass ratio to the solvent, and add the nano-scale CeO in the solvent 2 For an acrylic water-based binder with a mass ratio of 12%, add polyether-modified polyorganosiloxane with a mass ratio of 0.15% to the solvent, and stir and disperse at a third stirring speed of 200rpm and a third duration of 25min;...

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Abstract

The invention discloses a high-corrosion-resistance environment-friendly coating and a preparation method thereof, and belongs to the field of coatings. The coating includes: nanoscale metal oxide, water-soluble phosphate, phosphoric acid, a water-soluble binder, an aminocarboxylic acid chelating agent, a dispersing agent, a wetting agent and a water-containing solvent; wherein the nanoscale metal oxide is a transition metal oxide or a rare earth metal oxide; the nanoscale metal oxide is dispersed in a water-containing solvent in the form of particles to form a homogeneous system; the water-containing solvent is a water-containing methanol solvent. On the basis of a phosphate system corrosion-resistant coating, the nano-scale metal oxide is uniformly dispersed in the coating, and the nano-scale metal oxide can be deposited in micropores or cracks of a phosphating film to achieve a hole sealing effect, so that the corrosion-resistant effect of a metal product on moisture and an acid medium is greatly improved.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an environment-friendly coating with high corrosion resistance and a preparation method thereof. Background technique [0002] Most metal materials (such as iron, aluminum, copper, etc.) have relatively active chemical properties and strong reducibility. Long-term exposure to humid environments will cause metal materials to slowly react with moisture and oxygen in the air, resulting in rust. At the same time, metal materials have poor acid resistance and are easily corroded by acidic media. How to improve the corrosion resistance of metal products has been perplexing manufacturers at all levels in the metal market. [0003] At this stage, the common anti-corrosion technologies are the following three schemes: one is to cover the metal substrate with a layer of corrosion-resistant metal or metal alloy by means of electroplating, spraying or alloying treatment, but the corrosion-resistant...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/65C09D7/20C09D7/63C09D7/61
CPCC09D1/00C09D5/08C09D7/65C09D7/20C09D7/63C09D7/61
Inventor 张建朋方龙沈宇越
Owner 新纶新能源材料(常州)有限公司
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