THE IMPROVEMENT OF PASSIVE FILM STABILITY OF 2Cr13 STEEL BY USING LASER SURFACE REMELTING

J Chin Soc Corr Pro

1991, Vol. 11

Issue (4): 378-386 DOI:

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THE IMPROVEMENT OF PASSIVE FILM STABILITY OF 2Cr13 STEEL BY USING LASER SURFACE REMELTING

Song Shizhe Tang Zilong and Wang Wei (Dept of Materials; Tianjin University)

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Abstract Laser remelting treatment was done on the surface of 2Cr13 stainless steel by 2kW CO_2 laser with continuous wave. The passive characteristics and the stability of passive films of treaed area were determined respectively in 0.5 mol/L H_2SO_4 and 0.5mol/L H_2SO_4+0.3mol/L NaCl by means of potentiostatic-galvanostatic transient technique and other electrochemical measurement methods. The microstructure and surface morphology at laser remelting area were observed by scanning electron microscope (SEM). The results indicated that laser remelting treatment improved the passive performance of 2Cr13 and that its stability and pitting resistance of passive films were promoted a lot. The corrosion characteristic of treated area is comparable to that of 0Cr18Ni9 austenitic stainless steel. The corrosion resistance mechanism was discussed preliminarily.

Received: 25 August 1991

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Song Shizhe Tang Zilong and Wang Wei (Dept of Materials; Tianjin University). THE IMPROVEMENT OF PASSIVE FILM STABILITY OF 2Cr13 STEEL BY USING LASER SURFACE REMELTING. J Chin Soc Corr Pro, 1991, 11(4): 378-386.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1991/V11/I4/378

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