Abstract

As light water reactor operation continues, there is concern for the effects of thermal aging of structural materials and welds. Cast stainless steels are a particular concern, but stainless steel weld metals are also ‘cast’ and always have ferrite, but may be overlooked. Ferrite is an essential feature of stainless steel welds, where a ferrite level of 5 – 10% is generally targeted but 15% ferrite is sometimes observed. Key concerns include the effect of aging on fracture toughness and on stress corrosion cracking. This paper focuses on the effect of aging on stress corrosion cracking in BWR water.

Keywords:
oilfield chemistry, corrosion management, steel, production chemistry, cast stainless steel, texas 77084, stainless steel weld metal, ferrite, metals & mining, h2s management
Subjects:
Production Chemistry, Metallurgy and Biology, Corrosion inhibition and management (including H2S and CO2)
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2015. NACE International
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