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| STUDY OF PITTING BREAKDOWN FOR 321 STAINLESS STEEL IN NaCl MEDIA BY AAS |
| TANG Zilong;SONG Shizhe( Tianjin University; Tianjin 300072); GUO Tingkai(Tianjin Professional College; Tianjin 300402)(Manuscript received 1995-09-11) |
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Cite this article:
TANG Zilong;SONG Shizhe( Tianjin University; Tianjin 300072); GUO Tingkai(Tianjin Professional College; Tianjin 300402)(Manuscript received 1995-09-11). STUDY OF PITTING BREAKDOWN FOR 321 STAINLESS STEEL IN NaCl MEDIA BY AAS. Acta Metall Sin, 1996, 32(4): 443-448.
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Abstract Atomic absorption spectrometry (AAS) has been applied to investigate the kinetics of pitting propagation for 321 stainless steel in 0.5 mol/ L NaCl media. The results indicate the occurrence of the active corrosion of metals in the pitting holes. Fe, Ni and Mn, in form of divalence, and Cr in form of trivalvence dissolve into solution. On the basis of AAS data, the influence of the amounts Fe2+ and Cr3+ dissolved in corrosion pits upon the autocatalytic processes is discussed. Correspondent: SONG Shizhe, professor,(Department of Materials Science and Engineering, Tianjin University, Tianjin 300072)
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Received: 18 April 1996
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