Application of non-toxic anti-rust pigment based on hydrotalcite in water-based industrial paint

With the rapid development of industry, metal materials have been widely used due to their excellent process and mechanical properties, but the annual economic loss caused by the corrosion of metal materials amounts to trillions of yuan, so the protection of metal materials is of great significance

The electron microscope photo of the hydrotalcite sheet is shown in the figure below.

Fenghong’s modified hydrotalcite is a chromium-free and phosphorus-free anti-corrosion pigment.

Water and salt spray resistance of modified hydrotalcite in waterborne epoxy system

The modified hydrotalcite is used in waterborne epoxy coatings, the WP content is 3%, the paint film thickness is 30±2 microns, and the water resistance and salt spray resistance are tested

Water resistance: Adding WP system paint film has no abnormal water resistance for 240 hours, the blank group is resistant to water for 48 hours and foaming, and the competition control group is resistant to water and foaming for 96 hours

Salt spray resistance: 240h salt spray resistance, the addition of WP system is better than the competitive control group than the blank group

Water resistance test of waterborne epoxy system

Salt spray resistance test of waterborne epoxy system

Electrochemical test of modified hydrotalcite in waterborne epoxy system

Electrochemical AC impedance is a method to study the dynamics of the electrochemical process of electrodes.

Electrochemical impedance diagram of waterborne epoxy system

Salt spray resistance of modified hydrotalcite in water-based alkyd system

The modified hydrotalcite was applied to the water-based alkyd paint, the WP addition amount was 5%, the paint film thickness was 25 ± 5 microns and 40 ± 5 microns, respectively, to test the salt spray resistance

Alkyd resin 1, paint film thickness of 25±5 microns, salt spray resistance: salt spray resistance for 168h, zinc phosphate and the competitive control group are fully foamed, and the WP system is better

Alkyd resin 2, paint film thickness of 40 ± 5 microns, salt spray resistance: salt spray resistance for 216 hours, the addition of WP system is better than the competitive control group than the blank group

Salt spray resistance test of alkyd resin 1 system

Alkyd resin 2 system salt spray resistance test

 Summarize

Fenghong's modified hydrotalcite product WP can improve the water and salt spray resistance of the paint film
.