Preparation and Properties of Heavy-Duty Anticorrosive Powder Coatings with High Tg2 for Stainless Steel.

A heavy-duty anticorrosive powder coatings with its glass transition temperature (T_g2) of more than 120 °C has been developed, which can be applied and rapidly cured on the surface of duplex stainless steel pipes. By means of formula modification of different epoxy resins, curing agents and coupling agents, the problem that the T_g2 of conventional epoxy powder coatings is less than 120 °C can be solved, meanwhile the film defects such as boiling adhesion and cathodic stripping are solved. Thus, the coatings with high T_g2 can be used for the protection of the exterior surface of stainless steel pipes wherein the temperature of medium is more than 100 °C. It enriches the portfolio of anticorrosive powder coatings and widens the applications of powder coatings. [ABSTRACT FROM AUTHOR]