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| A STUDY OF CORROSION ELECTROCHEMISTRY OF GCR15 STEEL TREATED BY MULTIPLE METHOD OFLASER MELTING SOLIDIFICATION AND RE DIFFUSED PERMEATION |
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| 哈尔滨工业大学应用化学系 |
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Abstract This paper studies the effects on corrosion resista nce of GCr15 steel surface and its microstructure using the multiple treatment o f RE permeation combined with laser melting solidification.The results show that the corrosion resistance of samples with multiple treatment has been improved s ignificantly,in comparison with those treated only by RE permeation.Under acid e nvironment,both polarization current density and passivation current density rem ain low and polarization potential moves to negative-going direction,resulting i n a broader passivation zone; in addition,the enclosed area in cyclic voltammete r curves is decreased obviously with a sharp reduction of corrosion current dens ity.SEM and XRD are applied for analyzing the improvement mechanism of corrosion resistance.
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Received: 14 November 2000
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TG174.3+6
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TG146.4+5
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