Rust conversion type waterborne rusty coating and preparation process thereof

Abstract

The invention discloses a rust conversion type waterborne rusty coating and a preparation process thereof. The rust conversion type waterborne rusty coating is mainly prepared from the following components in parts by weight: 30-40 parts of a copolymer emulsion, 1-5 parts of an alcohol-ether solvent, 5-10 parts of an antirust pigment, 1-3 parts of a corrosion inhibitor, 3-15 parts of a pigment, 5-15 parts of filler, 2-6 parts of hydroxyethylidene diphosphonic acid, 0.3-0.8 part of a flash-rust inhibitor, 20-30 parts of deionized water, 0.1-0.5 part of a surfactant, 0.1-0.5 part of an organosilicon defoamer, 0.1-0.5 part of a thickener, 0.5-1.5 parts of an emulsion stabilizer and 0.5-1.5 parts of a multifunctional polymer dispersant. According to the rust conversion type waterborne rusty coating, by adopting the copolymer emulsion prepared from vinyl chloride, vinylidene chloride and an acrylic emulsion as a film forming matter, VOC (volatile organic compound) emission is effectively lowered, harms to environment and a human body are reduced; and a conversion agent of the hydroxyethylidene diphosphonic acid does not erode a metal matrix and is non-toxic and harmless, so that the rust conversion type waterborne rusty coating can omit cleaning work of a rusty layer before the surface of a corrosion matrix is coated with an ordinary coating and also obtains good preservative effect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a rust conversion type water-based rust coating and a preparation process thereof. Background technique [0002] In today's era, steel is an important engineering and structural material. More than 90% of the metal used is steel, and 70% of the steel is used in an environment that is prone to rust. The loss caused by steel corrosion is a very serious problem. In industrially developed countries, the direct loss caused by steel corrosion accounts for about 4% of the total output value of the national economy. Therefore, it is necessary to paint the steel surface. Paint is a product that can firmly cover the surface of objects for protection, decoration, and marking. Because it is applied to the metal surface with residual rust, the type rust coating can stabilize, passivate or transform the rust, and turn the active rust into a harmless substance, so as to achieve the dual functi...

AI Technical Summary

Problems solved by technology

[0002] In today's era, steel is an important engineering and structural material. More than 90% of the metal used is steel, and 70% of the steel is used in an environment that is prone to rust. The loss caused by steel corrosion is a very serious problem. In industrially developed countries, the direct loss caused by steel corrosion accounts for about 4% of the total output value of the national economy. Therefore, it is necessary to paint the steel surface. Paint is a product that can firmly cover the surface of objects for protection, decoration, and marking. Because it is applied to the metal surface with residual rust, the type rust coating can stabilize, passivate or transform the rust, and turn the active rust into a harmless substance, so as to achieve the dual functions of rust prevention and protection. The existing rust conversion The common VOC emission of the type rust coating is easy to exceed the standard, which is extremely harmful to the environment and the human body. However, the traditional process of completely removing the rust on the substrate makes the production efficiency low, and the rust dust generated by rust removal is easy to cause harm to the human body. cause harm