Use new corrosion inhibitors to improve the corrosion resistance of coatings

Barrier coatings can reduce permeability, thereby preventing oxygen and water from reaching the surface of the coating.

Zinc-rich primer is a good example of a coating that can provide corrosion protection, at least a partial cathodic protection.

The use of anti-corrosion pigments is one of the most widely used methods to improve the corrosion resistance of coatings.

Regulatory issues will continue to be the driving force for some time to come, especially corrosion inhibitors.

Adding organic corrosion inhibitors to the coating is another way to improve the corrosion resistance of the coating.

Some new corrosion inhibitors have been developed, which can impart excellent anti-rust properties in various water-based and non-aqueous high-performance coatings.

discuss

The current dominant trend in the coatings market is not to use primers in high-performance coating systems and to use reinforced topcoats instead of DTM applications.

In the past, organic corrosion inhibitors used in primer systems were based on phosphates, sulfonates and carboxylates.

　　In order to solve this problem, some new liquid corrosion inhibitors have been developed, which are based on complex metal salts of organic acids.

　　Two-component polyurethane DTM coating

　　In order to prove the efficacy of these new corrosion inhibitors, they were used in various DTM coatings and compared with more conventional organic corrosion inhibitors.

　　In the second formulation, a white two-component polyester polyol formulation with more pigments was formulated to a pigment to base ratio of 1.

　　Water-based thermosetting system

　　Although these new corrosion inhibitors were developed for DTM coatings that do not use primers, they can also be used in primer systems.

　　in conclusion

　　In direct application to metal coatings (DTM), this new generation of liquid organic corrosion inhibitors can be used to enhance the performance of non-toxic anti-corrosion pigments.