A PHOTOCURRENT SPECTRA STUDY OF PASSIVE FILMS ON SENSITIZED STAINLESS STEEL IN ACIDIC SOLUTION

J Chin Soc Corr Pro

1995, Vol. 15

Issue (4): 285-290 DOI:

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A PHOTOCURRENT SPECTRA STUDY OF PASSIVE FILMS ON SENSITIZED STAINLESS STEEL IN ACIDIC SOLUTION

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Abstract A photo-electrochemical method for evaluating the stability of passive film was established. Passive films formed on sensitized 1Cr18Ni9Ti stainless steel in an acidic solution (0.5mol/L HZSO4+0.01mol/L KSCN)were examined using photo-current speCtra. The erperimeatal results indicated that the passive films showed characteristics for n-type or p-type semiconductor in different potential regions. The differences in the photo-electrochemical behaviour could be attributed to changes in composition of the passive film associated with different hydration degreeS of Cr(Ⅲ) oxides at different potentials and surface states. The photo-electrochemical technique proved to be useful for studying seasitization of stainless steel.

Key words: Passive film Stainless steel Photoelectrochemistry Thanspassive

Received: 25 August 1995

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Du Tianbao;Yang Maizhi; Chen Shenhao;Chen Li;Cao Chunan1(The Institute of Corrosion and Protection of Metals;Key Laboratory for Corrosion and Protection;Shenyany 110015)2. (Beijing University)3. (Shandong University). A PHOTOCURRENT SPECTRA STUDY OF PASSIVE FILMS ON SENSITIZED STAINLESS STEEL IN ACIDIC SOLUTION. J Chin Soc Corr Pro, 1995, 15(4): 285-290.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I4/285

1SunseriC,PiazzaS,PaolaADi,QuartoFDi．J．Electrochem．Soc．,1987,134:24102BurleighTD,LatanisionRM．J．Electrochem．Soc．,1987,134:1353SedriksAJohn．Corrosionofstainlesssteel,johnWiley&sonsInc．19794PaolaADi,ShuklaD,SteammingU．Electrochem．Acta．,1991,36:3455KeshoE,RozenfeldIL．Electrokhimiya,1986,4:12006SunseriC,PiazzaS,QuatoFDi．J．Electrochem．Soc．,1990,137:24117VermilyeaDA．AdvancesinElectrochemistryandElectrochemicalEngineering,1963,3(N．Y)

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