The Influence of Metal Surface on Epoxy Floor Coating Application

The properties of metal materials such as steel are hard and dense, with high surface energy and a surface tension of 500-5000mN/cm, making them easy to adhere to epoxy floor paint coatings. However, due to the presence of oxide scale, rust, welding slag, dust, and grease on the surface of steel products during steel smelting, forming, and processing, these substances pose a great threat to the adhesion of coatings and the surface effect of coatings, providing opportunities for the occurrence of coating defects in epoxy floor coatings.

The common defects in epoxy floor paint coating caused by the surface characteristics of metals such as steel are poor adhesion, pinholes, roughness, fish eyes, etc. There are three reasons for coating defects such as poor adhesion, pinholes, fish eyes, and roughness when applying epoxy floor paint on steel metal surfaces.

1、 The surface treatment of steel metal before painting is not good, leaving rust, welding slag, dust, etc. that are not clear and clean. Coating epoxy floor paint on such metal surfaces can easily cause defects such as reduced adhesion and rough coating.

2、 Due to the heavy corrosion on the surface of the coated metal, small rust holes were left without polishing during surface treatment. During coating, the air inside the small holes was covered by the paint in the wet coating film. During the drying process, these air holes broke through the epoxy floor paint wet coating film and returned to the atmosphere, forming pinholes.

3、 The surface of steel and metal coated with epoxy floor paint is contaminated by low surface tension substances such as grease and surfactants, and the coating cannot spread evenly to these surfaces, resulting in coating defects such as fish eyes or even vortices.

If you have any needs in this regard, please contact us in a timely manner, and we will provide you with the best service. Jinfeng Epoxy Flooring National Free Hotline: 400-856-1101 ext. 8902 Website: http://p.jinfengpaint.com