Structure of the Passive Film formed on Fe-Mn-Si-Cr-Ni Shape Memory Alloy after Wet and Dry Corrosion Test

被引：4

作者：

Nishimura, T. ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

MATERIALS TRANSACTIONS | 2014年 / 55卷 / 06期

关键词：

shape memory alloy; corrosion; transmission electron microscopy; electrochemical impedance spectroscopy; ENERGY-LOSS SPECTROSCOPY; TRANSITION-METAL OXIDES; WET/DRY ENVIRONMENT; CHLORIDE-IONS; TRANSFORMATION; BEHAVIOR; STEEL;

D O I：

10.2320/matertrans.M2014029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion resistance of an Fe-Mn-Si-Cr-Ni shape memory (16 Mn) alloy was estimated by the wet and dry corrosion tests, and the structure of the passive film formed on the alloy was examined by primary EELS (Electron Energy Loss Spectroscopy) using TEM (Transmission Electron Microscopy) analysis. The electrochemical behavior of 16 Mn alloy was investigated by EIS (Electrochemical Impedance Spectroscopy). 16 Mn alloy showed much higher corrosion resistance than the carbon steel (SM) in wet and dry corrosion tests. In EIS measurement following corrosion test, 16 Mn alloy had much larger value of corrosion resistance (Z(1mHz)) by forming the passive film as compared to SM. In AES (Auger Electron Spectroscopy) and XPS (X-ray Photoelectron Spectroscopy) analysis, the passive film of 16 Mn alloy was shown to contain Fe, Mn, Cr, Si and Ni. From TEM-EELS, the passive film was found to consist of 2 layers of a Cr Si-rich in inner and an Mn-rich outer layer of Fe oxide. It was found that 16 Mn alloy could maintain the passive film which composed of effective elements in the wet and dry environment.

引用

页码：871 / 876

页数：6

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