Elevated Temperature Aqueous Stress-Corrosion of Stainless Steel.
Annual technical rept. (Final) Apr-Dec 80,
IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (ENGLAND)
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The susceptibility of austenitic 304 stainless steel to aqueous or dilute acid attack at ambient and elevated temperatures has been investigated. It is found that, unlike aluminum alloys, this material under the conditions investigated is not embrittled by pre-exposure to water vapour and it is concluded that this is due to the inability of hydrogen to permeate the oxide surface film during static testing. Slow strain rate testing in dilute acid, under free corrosion or cathodic potential, has shown that hydrogen embrittlement is an important factor in the intergranular stress corrosion cracking of austenitic stainless steel. Cathodic charging of thin foils with hydrogen was found to promote the formation on martensite and intergranular cracks. Author
- Properties of Metals and Alloys