Round-Robin Evaluation of a New Standard Laboratory Test for Cosmetic Corrosion

A new, standard laboratory test (SAE J 2334) for evaluation of the cosmetic corrosion resistance of autobody steel sheet has been developed through the joint efforts of SAE's Automotive Corrosion Prevention Committee (SAE/ACAP) and the Auto/Steel Partnership's (A/SP) Corrosion Task Force. Results from this test give an excellent correlation with those of on-vehicle tests conducted in Montreal, Quebec, and St. John's, Newfoundland. To establish the precision of the new test, nine laboratories participated in a round-robin evaluation. Each laboratory tested ten standard, painted automotive steel sheet products. The results of this work are analyzed in terms of within-lab repeatability and lab-to-lab reproducibility, and they are an important and final milestone in the development and specification of the new test