SEDL / STP / STP1000-EB / STP39200S

Using Multisample Test Apparatus for the ASTM A 262, Practice C Nitric Acid Corrosion Testing of Types 304 and 304L Stainless Steels

Corbett, RA
President, Corrosion Testing Laboratories, Inc., Wilmington, DE

Pages: 13    Published: Jan 1990

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Abstract

The single-sample, single-flask method generally is used by testing laboratories when industry and government agencies specify corrosion evaluation of Types 304 and 304L stainless steels to ASTM A 262, Practice C. Information presented confirms that multisample test equipment in use for many years has permitted major savings in chemicals, labor, laboratory space, and equipment and at the same time has successfully avoided problems associated with the detrimental buildup of hexavalent chromium ions. A new multisample tester design is also discussed. This new design avoids the problems of weight, bulk, and expense associated with early multisample testers and yields results of the same accuracy and reproducibility as both the single-sample, single-flask method and earlier multisample testers.