Improving zinc-rich epoxy primer performance with lamellar zinc incorporation


It is estimated that 25 % of the world’s steel produced annually is destroyed by corrosion and, since steel is used on a large scale, corrosion can lead to high losses. Among the forms of corrosion protection for carbon steel structures exposed in different atmospheres, painting is one of the most used. Zinc rich paints are commonly used as a paint system primer for carbon steel protection exposed to highly corrosive environments. Thus, zinc rich paints have the function of protecting against corrosion and imparting adhesion to the metal substrate. This study proposes a zinc rich paint formulation in which part of the spherical metallic zinc microparticles is replaced by lamellar zinc particles, providing better packaging with lower zinc content in the film which aims at ensuring better mechanical performance of this coating. A significant increase in the mechanical properties of the developed formulation was achieved when compared to a commercial zinc rich paints without compromising its conductivity.

SANTOS, Paloma Vieira dos; MOTTA, Alessandra Nery Gonçalves; MORTARI, Marília Santos Menossi; FRANCISCO, Danae Lopes; ALMEIDA, Neusvaldo Lira de; PANOSSIAN, Zehbour. Improving zinc-rich epoxy primer performance with lamellar zinc incorporation. In: INTERNATIONAL CORROSION CONGRESS, 21., AND THE INTERNATIONAL CORROSION MEETING, 8., 2021, São Paulo. (on-line) Proceedings… 11p.

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