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STUDY ON MULTIPLE-LAYER STRUCTURE OF PASSIVE FILM ON STAINLESS STEEL BY POTENTIOSTATIC-GALVANOSTATIC TRANSIENT TECHNIQUE III. Stability of Passive Film on 2205 and 316L Stainless Steels in NaCl Media |
TANG Zilong; SONG Shizhe(Tian jin University; Tian jin 300072).KANG Cuirong(Analysis Center; Tianjin Universitry; Tianjin 300072)(Manuscript received 1994-09-19; in revised form 1995-02-23) |
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Cite this article:
TANG Zilong; SONG Shizhe(Tian jin University; Tian jin 300072).KANG Cuirong(Analysis Center; Tianjin Universitry; Tianjin 300072)(Manuscript received 1994-09-19; in revised form 1995-02-23). STUDY ON MULTIPLE-LAYER STRUCTURE OF PASSIVE FILM ON STAINLESS STEEL BY POTENTIOSTATIC-GALVANOSTATIC TRANSIENT TECHNIQUE III. Stability of Passive Film on 2205 and 316L Stainless Steels in NaCl Media. Acta Metall Sin, 1995, 31(20): 360-367.
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Abstract Structure and stability of the passive films on 2205 and 316L stainless steels in the NaCl solution media, 0.5 and 1.0 mol/L, were studied by using the potentiostatic-galvanostatic (P-G) transient technique. A multiple layer structure of the passive films is revealed on both steels. The action model and breakdown mechanism were suggested on the discussion of the Cl- behaviour against growth and breakdown of the passive films on the steels.The polarized potential dependence on the electrochemical parameters may be determined by P-G response curves. The corrosion resistance to NaCl media of 2205 diphase steel is much superior to that of 316L steel. Furthermore. A preliminary discussion of effect of metallographical structure of 2205 diphase steel on the stability and pitting resistance of passive film was made.Correspondent: SONG Shizhe, professor, Department of Materials Science and Engineering, Tianjin University, Tianjin, 300072
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