Abstract: Basalt flake is a new kind of environmental protection material, which has a broad application prospect in improving the performance of anticorrosive coatings. The basic performance parameters such as thickness, composition, crystallinity and micromorphology of basalt scales were characterized in this paper. Basalt scales were modified with silane coupling agent kh-550. Basalt scales treated with silane coupling agent were added to epoxy resin E51 to prepare heavy anticorrosive coating. The effects of addition amount and particle size of the scales on wear resistance, hardness, water absorption and alkali corrosion resistance of the coating were studied. The test results show that the surface hardness of the coating with basalt scales increases greatly. The particle size and content of basalt scales have coupling effect on coating properties. It is found that basalt scale mass fraction of 6%, size between 60 and 80 mesh produce the best wear resistance coating. With the increase of scale content, the water absorption of coating decreases. In the aspect of alkali corrosion resistance, the alkali corrosion resistance of the coating increases with the decrease of the size of the scale, and then decreases with the increase of the scale content. The alkali corrosion resistance of the coating is the strongest when the mass fraction of the basalt scale is 9%.

Key words: basalt flake, surface modification, solventless epoxy heavy anticorrosive coating, corrosion resistance, composite