Abstract:One-component polyurethane coatings on galvanized sheet steel are widely used to suppress white rust of the car body. To fulfill the requirements of corrosion resistance and aesthetics, such coatings have to withstand sheet forming and assembling operations without being damaged. Damage - which in the wide sense encompasses pores, surface and interface microcracks - would mean an inacceptable reduction in corrosion resistance and aesthetics deterioration. Therefore, understanding of coating damage initiation d… Show more
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