A special paint pretreatment agent for metal and preparation method thereof

Abstract

The invention relates to the field of metal coating, in particular to a metal-specific paint pretreatment agent and a preparation method thereof. The pretreatment agent includes, by weight, 30-65 parts of acid-resistant resin, 25-50 parts of solvent, 5-20 parts of monocitric acid, 2-10 parts of citric acid, 0.2-1 part of film-forming agent, disinfectant Foam agent 0.5-1.5 parts. The metal special paint pretreatment agent provided by the invention can omit processes such as washing and degreasing, and does not need related equipment such as special soaking or spraying tanks, which saves time, space and economic costs, and has good bare film rust resistance, and can be easily Good for improving the adhesion of paint on metal workpieces.

Description

technical field [0001] The invention relates to the field of metal coating, in particular to a metal-specific paint pretreatment agent and a preparation method thereof. Background technique [0002] Coating paint on the metal surface is a wide range of anti-corrosion methods, but it is an essential process step to perform a pretreatment process on the metal surface before the metal is coated with paint. It can accept the non-metallic protective layer, so that it has good adhesion to the paint film, so that the two can be more firmly adhered together, thereby improving the corrosion resistance of the coating. [0003] At present, phosphating technology is widely used as a pretreatment process for metal surfaces, but the conversion coating treatment solution in phosphating technology contains chromate or phosphate, which has caused serious pollution to the environment. Some non-phosphating processes, the patent CN 110029341 A discloses a surface washing silane treatment agent...

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Problems solved by technology

[0003] At present, phosphating technology is widely used as a pretreatment process for metal surfaces, but the conversion coating treatment solution in phosphating technology contains chromate or phosphate, which has caused serious pollution to the environment. Some non-phosphating processes, the patent CN 110029341 A discloses a surface washing silane treatment agent for metal coating pretreatment to form a silane film on the metal surface, but this method also needs to degrease, degrease, wash the metal workpiece surface, etc. Treatment processes, which require special soaking or spraying tanks and other related equipment, and also produce a certain amount of wastewater

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