Lubricant Coating Film for Zinc-plated Steel Sheets

For the improvement on the formability of zinc coated steel sheets for automotive use, very thin manganese-phosphorus type lubricant film has been studied and developed. In order to confirm the influences of the film on the car manufacturing process, the lubricant film was precisely studied. The results of the study show that the film improves the formability and gives no advers influence on the automotive manufacturing process and has good anti-corrosion properties after painting.