During the last few years, galvanostatic (constant current) techniques have been developed and applied to the determination of corrosion rates for various metal-electrolyte systems.(1)  Because the experimental procedures vary widely among laboratories, valid comparisons of data from different sources are either difficult or impossible. One of the first steps in developing standard experimental practices is to establish the extent to which laboratories following some given procedure can reproduce the required measurements. This is a progress report on the first of two rounds of interlaboratory testing.

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