In order to enhance the adhesive power between color coated steel sheets’ organic paintings and substrate, and improve the corrosion resistance of coating products. The surface process before coating the substrates have 2 crafts. They are ungrease treatment and chemical conversion film treatment. By the experiences of production process, CAMELSTEEL will introduce the ungrease treatment briefly.
1. Chemistry cleaning. People could use the organic solvent, surface active agent solution and alkali solution to soak and spout the metals’ surface to purify the greasy.
2. Polish-brush cleaning. The passivated film produced in the passivation treatment, together with the local rust and attaching dunghills should be handled by polish-brush before smearing the organic painting. The polish-brush cleaning makes the substrate surface to be active.
3. Electrolysis cleaning. Electrolysis cleaning could solve the substrate surface treatment problems about machincal and chemical cleaning. And it help the substrate to produce a microcosmic even rough surface to improve its adhesive force.