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Test Method G28

Last updated: July 19, 2024

What Does Test Method G28 Mean?

The G28 test method is a corrosion testing method used in many industries as quality check test for accessing the resistance to intergranular corrosion of various stainless steels and nickel-based alloys under certain environmental conditions. The test detects grain boundary differentiation and sensitization. Besides the final heat treatment, several factors come into consideration when determining the rate of corrosion in an alloy, although the chemical composition is the largest influence.

There are two G28 types: A and B.

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Corrosionpedia Explains Test Method G28

Test method G28, also known as the ASTM G28 method A test, is identical to the ASTM A262 method B test but with a much shorter duration. Unlike the G28 A test, the G28 B test is fundamentally a bimodal test for any alloy.

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