Modified environment-friendly waterborne anticorrosion coating and preparation method thereof

Abstract

The invention relates to a modified environment-friendly waterborne anticorrosion coating and a preparation method thereof, and belongs to the field of waterborne propylene anticorrosion coatings. Thecoating comprises waterborne emulsion and an organic compound modifying agent, and the organic compound modifying agent is at least one of organic amine, an organic amine derivative, organic phosphine and an organic phosphine derivative. According to the coating, a chemical bond is formed through other components such as strongly polar groups in the organic compound modifying agent, base materials, pigments and fillers and film forming matters, multiple modification of the base materials, the pigments, the fillers and the film forming matters is achieved, the coating has slow-release and passivation functions of inorganic rust-proof pigments and further has a shielding function absented by the inorganic rust-proof pigments, the coating has a long-term multiple anticorrosion function, theadhesive force of the coating reaches a level 0, optimal salt fog resistance cannot generate bubble and get rusty for 1000 hours or more, and optimal salt water resistance cannot generate bubble and get rusty for 600 hours or more.

Description

technical field [0001] The invention relates to a modified environment-friendly water-based anti-corrosion coating and a preparation method thereof, belonging to the field of water-based anti-corrosion coatings. Background technique [0002] At present, the anti-corrosion coatings used in China are mainly solvent-based coatings. Although this coating has good film-forming performance and good anti-corrosion performance, because it contains organic solvents, it not only has high VOC, pollutes the atmosphere, consumes more petrochemical energy, and also has fire hazards. Risk of explosion, even endangering human health. However, water-based coatings use water as a solvent, which is not only easy to obtain, low in cost, non-flammable, not harmful to human health, and easy to realize automatic coating. Therefore, in recent years, water-based environmentally friendly coatings have become the promotion direction of the country. [0003] Chinese invention patent specification CN10...

AI Technical Summary

Problems solved by technology

But this water-based industrial anticorrosion coating also has the following disadvantages: the anticorrosion performance of the coating is given by adding antirust pigments such as zinc phosphate, aluminum tripolyphosphate, iron titanium powder, although what is added is an environmentally friendly antirust pigment that does not contain heavy metal salts, but Since the anti-corrosion performance of environmentally friendly anti-rust pigments is poorer than that of anti-rust pigments containing heavy metal salts, the amount of environmentally friendly anti-rust pigments used is relatively large, which also greatly increases the manufacturing cost of coatings, which is not conducive to the development and application of coatings.

But this invention also has the following disadvantages: the test results disclosed in the example part of the description show that the corrosion inhibitor has excellent performance in the flash rust test, which can reach 0%, but it has been operated for 24 hours under the test conditions of 35 ° C and 5% saline solution In the salt spray test, the worst reaches 70%, and the best reaches 0.03%. At 35°C, 100% relative humidity, the worst reaches 33%, and the best reaches 0% in the QCT test of 200 hours of operation, which shows that the invention Long-term anti-corrosion performance is still lacking

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