High temperature baking-resistant Cr-free passivation coating for aluminised steel

Inorganic CrIII passivation or organic Cr-free passivation/TOC are commonly applied on aluminised steel coils to further enhance corrosion resistance. However, the poor machinability of inorganic CrIII passivation and poor baking resistance of organic Cr-free passivation/TOC
coating limit their application. Henkel has, therefore, developed a new inorganic Cr-fee passivation coating, BONDERITE M-PA 1344, based on sol-gel chemistry, providing both outstanding high temperature baking resistance as well as good corrosion resistance and machinability.