The Effect of Chromium and Chromium-Free Post-Phosphating Rinses on the Corrosion Performance of Zinc and Zinc Alloy Coated Sheet Steels After Five Years Outdoor Scab Corrosion Exposure 932358
A selection of commercially available chromium and chromium-free post phosphate rinses along with a deionized water rinse were evaluated over several zinc and zinc-alloy coated sheet steels. The test specimens were pretreated and electrocoated on-line in an automotive assembly plant. The effect of the rinse treatments on the cosmetic corrosion performance of the substrates, after 5 years of exposure in an outdoor scab corrosion test was determined. After this exposure none of the rinse treatments had performed better than deionized water rinse on zinc and zinc-iron coated sheet. The zinc-nickel coating showed improved scribe creepage when treated with the Cr+6/Cr+3 rinse. Data is provided comparing the concentration of the treatments used vs scribe creepage and chipping corrosion paint loss.
Citation: Hess, J. and Davidson, D., "The Effect of Chromium and Chromium-Free Post-Phosphating Rinses on the Corrosion Performance of Zinc and Zinc Alloy Coated Sheet Steels After Five Years Outdoor Scab Corrosion Exposure," SAE Technical Paper 932358, 1993, https://doi.org/10.4271/932358. Download Citation
Author(s):
John C. Hess, Dennis D. Davidson
Affiliated:
Chrysler Corp.
Pages: 7
Event:
SAE Automotive Corrosion and Prevention Conference and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Proceedings of the 6th Automotive Corrosion and Prevention Conference-P-268, SAE 1993 Transactions: Journal of Materials & Manufacturing-V102-5
Related Topics:
Zinc alloys
Corrosion
Coatings, colorants, and finishes
Chromium
Assembling
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