C. L. Yi, Y. Q. An, Y. T. Shen, X. A. Pang, China University of Mining & Technology, Xuzhou, China
When thermally sprayed coatings used as anti-corrosive coatings for steel and iron, the porosity of metalized coatings are usually sealed by proper organic paints. Its purpose is to seal and reduce inherent porosity of metalized coating, to smooth the surface texture and to extend the service life. The organic sealer mostly includes two-component epoxy primer or high build epoxy paint puls thinner. Its main shortcomings include high viscosity, big particle of inorganic color and filling, and poor penetration into the pores of the sprayed metallic coating. The nano-material modified epoxy sealer is newly developed by the authors specially for sealing metalized coatings, its advantages including: (1) the 10-100 nm nano-material distributing uniformly in liquid paints and cured film; (2) low viscosity to facilitate good penetration into the pores, no need thinning and can be applied by brush, roller or airless spray; (3) excellent adhesion to metalized coating and finishing coatings; (4) excellent performance of resisting attack by corrosive agents; (5) good to shield ultraviolet radiation.
Summary: The nano-material modified epoxy sealer is newly developed by the authors specially for sealing metalized coatings, its advantages including: (1) the 10-100 nm nano-material distributing uniformly in liquid paints and cured film; (2) low viscosity to facilitate good penetration into the pores, no need thinning and can be applied by brush, roller or airless spray; (3) excellent adhesion to metalized coating and finishing coatings; (4) excellent performance of resisting attack by corrosive agents; (5) good to shield ultraviolet radiation.
