SAE J2636_200604

This SAE lab recommended practice may be applied to corrosion test methods such as salt spray, filiform, Corrosion creep back, etc. This procedure is intended to permit corrosion testing to be assessed between Laboratories for correlation purposes. The laboratory corrosion testing of wheels and wheel trim for automotive applications does not have a calibration method that can isolate test equipment, process, personnel, gauging, procedures, and materials from the test results. This document provides a guideline for the establishment of a laboratory master test sample to be utilized to confirm the consistency of the test equipment and process to reproduce consistent results. The masters can also provide a basis to correlate the test results between different laboratories, different test equipment, and different laboratory personnel by analysis of the quantitative results of the testing. The use of masters also provides a basis for process variation to be evaluated within a calibrated laboratory. The existence of an approved master may also be an important tool in trouble shooting for the continuous improvement process for test development. Masters tested in conjunction with test sample pieces may provide a rationale for invalidating test results if the results are inconsistent with an established performance level for the master.