The Effect of Phosphate Chemistry and Rinsing Conditions on the Corrosion Resistance and the Paint Adhesion of Zinc Coated and Cold Rolled Sheet Steels 892557
A representative selection of commercially available zinc phosphate pretreatments were evaluated over four sheet metal substrates. The intent of the study was to compare cosmetic corrosion resistance and paint adhesion performance of the various sheet metal/phosphate combinations under present cathodic electrocoat and topcoat systems. While laboratory applied pretreatments were used, an attempt was made to duplicate deficient conditions on some specimens by eliminating rinse conditioner and/or chromium rinse. Panels were tested using the High Temperature Chipping Corrosion and Accelerated Outdoor Corrosion cycles. The resulting creepback from scribe and paint loss data were analyzed and used to draw conclusions regarding relative performances of rinse conditions, phosphates and substrates.
Citation: Hess, J. and Soreide, L., "The Effect of Phosphate Chemistry and Rinsing Conditions on the Corrosion Resistance and the Paint Adhesion of Zinc Coated and Cold Rolled Sheet Steels," SAE Technical Paper 892557, 1989, https://doi.org/10.4271/892557. Download Citation
John C. Hess, Laura E. Soreide
1989 SAE Automotive Corrosion and Prevention Conference and Exposition
Automotive Corrosion and Prevention Conference Proceedings-P-228