Corrosion behaviour of austenitic stainless steel as a function of methanol concentration for direct methanol fuel cell bipolar plate
Corrosion behaviour of austenitic stainless steel as a function of methanol concentration for direct methanol fuel cell bipolar plate
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直接甲醇燃料电池双极板奥氏体不锈钢的腐蚀行为随甲醇浓度的变化
DOI：
10.1016/j.jpowsour.2013.12.043
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发表时间：
2014-05
影响因子：
9.2
通讯作者：
Sun, Juncai
中科院分区：
文献类型：
--
作者：
Gao, Na;Du, Xiao;Jia, Linan;Sun, Juncai
在50°C的酸性甲醇水溶液（0.5 M H2SO4+ 2 ppm HF +xM CH3OH,x= 0,1,5,10和20）中，研究了AISI 304不锈钢（304 SS）的腐蚀行为，以模拟直接甲醇燃料电池的不同阳极操作条件。电化学测量包括动电位极化、恒电位极化和电化学阻抗谱测试，用于分析腐蚀行为。结果表明，在高甲醇含量的溶液中，304 SS的耐腐蚀性得到增强。扫描电镜和电感耦合等离子体原子发射光谱数据表明，随着甲醇浓度的增加，304 SS的表面腐蚀有所减轻。x射线光电子能谱和Mott-Schottky分析表明，在所有测试溶液中进行恒电位测试后，304 SS表面形成的钝化膜都是由外部n型半导体层和内部p型半导体层组成的双工电子结构。通过测量304 SS和碳纸之间的界面接触电阻进一步分析表面电导率，发现在甲醇含量较高的溶液中形成的钝化膜具有较低的电导率。
The corrosion behaviour of an AISI 304 stainless steel (304 SS) is investigated in aqueous acid methanol solutions (0.5 M H2SO4+ 2 ppm HF +xM CH3OH,x= 0, 1, 5, 10 and 20) at 50 °C to simulate the varied anodic operating conditions of direct methanol fuel cells. Electrochemical measurements including potentiodynamic polarisation, potentiostatic polarisation and electrochemical impedance spectroscopy tests, are employed to analyse the corrosion behaviour. The results reveal that the corrosion resistance of 304 SS is enhanced in solutions with higher methanol content. Scanning electron microscopy and inductively coupled plasma atomic emission spectrometry data indicate that the surface corrosion on 304 SS is alleviated when the methanol concentration is increased. According to the X-ray photoelectron spectroscopy and Mott–Schottky analyses, the passive films formed on the 304 SS after potentiostatic tests in all the test solutions are composed of a duplex electronic structure with an external n-type semiconductor layer and an internal p-type semiconductor layer. Further analyses of the surface conductivity conducted by measuring the interfacial contact resistance between the 304 SS and carbon paper reveal that the passive film formed in the solution with higher methanol content exhibits lower conductivity.
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影响因子：
8.3
作者：
V. Singh;V. Singh
通讯作者：
V. Singh;V. Singh
影响因子：
8.3
作者：
C. Brossia;E. Gileadi;R. Kelly
通讯作者：
C. Brossia;E. Gileadi;R. Kelly
影响因子：
8.3
作者：
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通讯作者：
M. Sakakibara;N. Saito;H. Nishihara;K. Aramaki
影响因子：
3.9
作者：
D. Macdonald
通讯作者：
D. Macdonald
高铬高镍奥氏体不锈钢双极板在质子交换膜燃料电池工作环境中的性能
影响因子：
9.2
作者：
Tian, Rujin;Sun, Juncai
通讯作者：
Sun, Juncai