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| CORROSION COMPOSITIONS ON SURFACE AFTER ELECTROCHEMICAL POLARIZATION OF DUPLEX STAINLESS CAST STEEL BY XPS |
| XIANG Hongliang, HE Fushan, LIU Dong |
| College of Mechanical Engineering, Fuzhou University, Fuzhou 350108 |
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Abstract Corrosion deposites of super duplex stainless cast steel on surface after electrochemical polarization in arterial seawater were studied by X-ray photoelectron spectroscopy in this paper. The results indicate that the outside passive film of cast duplex stainless steel is mainly composed of CrO3 and hydroxide type compounds such as CrOOH, Cr(OH)3, Fe(OH)3. The inside film is mainly composed of oxide such as CrO3、Cr2O3, FeO, Ni2O3, and some elements of Fe, Cr, Ni, Mo as simple substance in it. MoO2-4$ and NM+4 ions exist between passive film and solution which act fairly protective effect.
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Received: 18 June 2009
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Corresponding Authors:
XIANG Hongliang
E-mail: hlxianggg@sina.com
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