Rusty scale growth inhibitor for rusted steel and preparation method thereof

Abstract

The invention discloses a rusty scale growth inhibitor for rusted steel. The rusty scale growth inhibitor is prepared from the following raw materials in parts by weight: 50-100 parts of inorganic acid, 50-100 parts of gallic acid, 10-100 parts of aluminum triphosphate, 10-50 parts of potassium hydrogen tartrate, 30-50 parts of thiourea, 100-300 parts of isoamylol, 10-50 parts of surfactant, 1-50 parts of defoamer, 1-30 parts of thickener and 500-800 parts of water. The inhibitor can infiltrate into the deep part of the rusty scale, acts with active gamma-FeOH, and inhibits transformation to Fe3O4, so as to inhibit growth of an iron scale. In addition, chelate transformation reaction also can be carried out on the existing iron scale, and the iron scale is transformed into an inert protection layer. The inhibitor is broad in demands on the thickness of the rusty scale, does not cause corrosion to a steel base material, and can replace artificial derusting treatment, and the rusted steel base material reacting by the inhibitor can be directly coated with an anticorrosive primer.

Description

technical field [0001] The invention relates to a rust reaction material, in particular to a rust layer growth inhibitor for rusty steel and a preparation method thereof. Background technique [0002] Iron and steel components are easily corroded in the atmospheric environment, which will affect the operation of the equipment. In order to prevent the continuous corrosion of steel components, the rust layer on the surface is generally removed by rust removal, and then painted with anti-corrosion paint to isolate it from the corrosion caused by the atmosphere. Due to the complex and cumbersome operation of the iron and steel rust removal process, and the rust is easy to return, the cost of anti-corrosion is virtually increased. Converting the rust layer into a protective layer by chemical treatment is a relatively good anti-corrosion method at present, and has become a trend in steel anti-corrosion technology. [0003] In the current existing technologies, products such as r...

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Problems solved by technology

But its disadvantage is that the content of inorganic acid is high, which is more destructive to the substrate and subsequent paint film; it also contains glycerin, which has strong water absorption and slow drying, which affects subsequent construction

The publication number is CN102071414A. The Chinese patent discloses a rust-removing and anti-rust conversion film treatment agent. The rust-removal and anti-rust conversion film treatment agent is directly coated on the surface of steel to remove rust on the steel surface and form a conversion protection film. But its disadvantage is that it still has high inorganic acid content, and has strict requirements on the thickness of the rust layer, which is not universal.