Welding enhanced waterborne anticorrosive paint and preparation method thereof

Abstract

The invention provides welding enhanced waterborne anticorrosive paint which comprises the following components in percentages by weight: 40-50% of a hydroxyl-containing silicone acrylic emulsion, 5-7% of methyl-etherified melamine resin, 5% of graphite, 10-20% of stuffing, 0.5-1% of flash-rust resisting agent, 5-8% of an antirust pigment, 0.5-1% of a thickener,1-3% of a dispersant, a flatting agent and a defoamer, and 10-15% of purified water. The invention also provides a preparation method of the welding enhanced waterborne anticorrosive paint. The welding enhanced waterborne anticorrosive paint provided by the invention can be self-dried at constant temperature, the paint after film forming can endure a high temperature of 300 DEG C, has a light anticorrosive ability, and the film is further of weldability and can be used for a follow-up metal piece to be welded. The film can enhance the corrosion prevention ability by absorbing heat generated by welding, and the welded film can reach an intermediate corrosion prevention ability or even a heavy corrosion prevention ability. The antirust of a non-welded surface after welding not only is not reduced, but also is obviously enhanced.

Description

technical field [0001] The invention relates to a welding-enhanced water-based anticorrosion coating and a preparation method thereof. Background technique [0002] Anti-corrosion coatings, generally divided into conventional anti-corrosion coatings and heavy-duty anti-corrosion coatings, are an indispensable coating in paint coatings. Conventional anti-corrosion coatings play an anti-corrosion effect on metals under normal conditions and protect the service life of non-ferrous metals; A type of anti-corrosion coating that achieves a longer protection period than conventional anti-corrosion coatings. [0003] The application of water-based anti-corrosion coatings in the field of heavy-duty anti-corrosion coatings is on the rise, such as infrastructure, oil and gas and power industries, as well as industrial tanks, ships and chemical industries. Water-based anti-corrosion coatings can provide effective protection for steel under extreme conditions. [0004] However, the ex...

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Problems solved by technology

[0004] However, the existing water-based anti-corrosion coatings are generally not suitable for metal parts that need to be welded subsequently, and the metal parts coated with water-based anti-corrosion coatings cannot be subsequently welded, and the high temperature during welding will seriously affect the anti-corrosion and anti-rust capabilities of the paint film.

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