Preparation method of water-based epoxy ester rust-surface primer

Abstract

The invention discloses a preparation method of a water-based epoxy ester rust-surface primer, relating to the technical field of antirust treatment of a metal surface. The preparation method comprises the following steps: firstly, mixing the water-based epoxy ester resin with a dryer, then mixing with a dispersant, pigment and filler and antirust pigment, then blending a film-forming assistant, adefoaming agent and a leveling agent into the mixture, regulating pH value and then blending a rust transforming agent, deionized water and thickening agent into the mixture, to obtain the water-based epoxy ester rust-surface primer, wherein the rust transforming agent contains strontium chromate and composite phosphate. No gas is generated in production technology, the defects of the phosphate rust transforming agent can be avoided, and the prepared product can be applied to rusted base material surfaces which are not subjected to sandblasting derusting and are only subjected to simple treatment, and has excellent adherence force with rusted base material. The product is high in surface treatment tolerance, provides good anti-corrosion protection for protected articles after being directly coated on the rusted base material surfaces, and is good in product application property and anti-corrosion property.

Description

technical field [0001] The invention relates to the antirust treatment technology of metal surfaces, in particular to the production technical field of primer used in the treatment of rusty metal surfaces. Background technique [0002] At present, the economic loss caused by corrosion to the society is as high as hundreds of billions of dollars. In order to protect steel from corrosion, anti-corrosion coating on steel has become the most economical and effective method. The surface treatment of steel before painting is a necessary means to ensure the anti-corrosion effect of painting. For rusted steel, the rust removal treatment is the most important part of the entire coating process and plays a decisive role in the coating supporting system. However, for many large buildings, such as bridges, ships and other complex steel structure maintenance process, due to the limitation of construction conditions, it is difficult to use sand blasting and rust removal process with the ...

AI Technical Summary

Problems solved by technology

[0003] The traditional rust coating scheme uses phosphoric acid as the rust conversion agent. Phosphoric acid and rust undergo a chemical reaction to form a phosphating film. However, due to the precipitation of hydrogen gas during the reaction, the paint film will foam and the adhesion will decrease. Therefore, in recent years, phased out