Electrodissolution of 304 stainless steel in neutral electrolytes for surface decontamination applications |
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| Authors: | M Neergat KR Weisbrod |
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| Affiliation: | Applied Engineering Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA |
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| Abstract: | Brightening of 304 stainless steel in concentrated electrolytes of Na2SO4, Li2SO4, NaNO3, LiNO3, NH4NO3, and Ca(NO3)2 was studied. It is observed that the current efficiency and quality of the surface depend on the electrolyte concentration, ions present in the electrolyte and the operating current density. While sulfate electrolytes etch the electrodes, oxidizing electrolytes generally yield brightened surfaces. Surface brightening is achieved at the lowest current density in LiNO3/Na2Cr2O7 composite electrolyte at a pH of 5.2. The results are explained on the basis of salt film formation near the specimen surface. |
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| Keywords: | A Stainless steel B XPS C Anodic dissolution C Anodic films C Selective oxidation C Segregation |
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