The Preparation And Research Of A Kind Of Water-based Rust Conversion Agent

In this paper, catechol, pyrogallol, styrene-acrylic emulsion as the main raw material,and with the film-forming additives and penetrating agent, conversion of rust paint. The optimum formulation of water - soluble transforming rust paint was determined by orthogonal test, and the surface tension, density, viscosity and pH value were tested. The properties of film formation after water - soluble transforming rust paint were investigated by electrochemical workstation, adhesion tester, neutral salt spray test and weathering test.And the mechanism of film formation and rust prevention were discussed.The optimum formulation of water-soluble transforming type rust paint was determined by orthogonal test: 80% of film-forming material A, 3% of conversion agent B,3% of conversion agent C and 3% of corrosion inhibitor D %, penetration agent E is 3%.Adhesion tester can be used to test the adhesion of the film up to the first grade standard.The surface tension of the rust coating was 30.97mN / m, which was less than the surface tension of the water, which proved that the film had good spreadability on the surface of the metal substrate. Water-soluble conversion of the rust paint viscosity of 42.8 mPa.s, the film off the lowest rate, the strongest adhesion. According to the neutral salt spray test, the optimum corrosion layer thickness of water-soluble transforming rust paint is 30?m. The optimum film forming temperature of the water-soluble transforming rust paint is about normal temperature, and the best dosage of 12cm x 6cm x 2cm Q235 steel plate is 4g. The optimum reaction drying time was 10h, and the optimum film forming temperature was 20?. The optimum reaction time was 10h. The corrosion rate of water - soluble rust -resistant rust paint was determined by neutral salt spray test. Rust-proof paint for rust-prone metals and surface rust is not serious material, the rust transformation and better anti-corrosion effect. In the neutral salt spray test with the mass fraction of 5% sodium chloride solution, there was no obvious rusting in four cycles. In the case of temperature below 250? has a strong anti-corrosion properties. .Open-air weathering test results show that water-soluble rust-type rust paint rust-proof period of up to one year. Compared with the commercially available rust paint, self-made water-soluble rust-type rust paint has strong corrosion resistance, and good performance with the topcoat, especially with the use of epoxy resin, with better anti-corrosion rust effect.