sulphuric acid anodizing
(1) The film coating is transparent, showing the natural color of the substrate
(2)The film coating has good corrosion resistance, good bonding strength, and a good insulation performance. It is the most common method of anti-corrosion.
(3) The thickness of the film coating is 5~12um, and the size of the parts changes slightly after anodizing.
(4) The film coating is porous (porosity is 20%-30%), and the paint layer is well combined.