The Corrosion of Stainless Steel in Oxygen-Contaminated Sodium at 1200 F and 1400 F
Stainless steel structures in contact with liquid sodium at temperatures from 1000–1400 F undergo corrosion primarily as a function of the purity of the sodium. The principal impurities in sodium are carbon and oxygen. If the system encompasses a temperature differential, a further effect is superimposed. This is the mass transfer of specific elements out of the stainless steel in the hot leg with subsequent deposition in the cold leg. This selective leaching is normally restricted to the substitutional elements, -- primarily chromium and nickel -- but under some circumstances carbon is also transferred.
KeywordsOxide Scale Green Scale Microprobe Trace Ferritic Iron Stainless Steel Structure
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