316L不锈钢、690合金在氢氧化钠溶液中的电化学性能
Electrochemical Properties of 316L Stainless Steel and 690 Alloy in NaOH Solution
摘 要
采用动电位极化、电化学阻抗和电容测量等方法研究了316L、690合金在NaOH溶液中的电化学行为及生成钝化膜的半导体性质。在NaOH溶液中, 316L不锈钢存在明显的钝化区间; 316L不锈钢、690合金在NaOH溶液中电化学阻抗谱的阻抗模值相近。动电位电化学阻抗谱(DEIS)表明, 随扫描电位正移, 钝化膜的阻抗在测试溶液中具有明显不同的变化, DEIS结果与动电位极化曲线形成对应。在0.1 V电位形成钝化膜的Mott-Schottky曲线表明, 316L不锈钢在NaOH溶液中的平带电位EFB为0 V, 而690合金在NaOH溶液中的平带电位EFB为-0.3 V。690合金与316L不锈钢在NaOH溶液中表现出不同的成膜特性。
690合金
电化学阻抗
Mott-Schottky曲线
平带电位(EFB)
316L stainless steel
690 alloy
EIS
Mott-Schottky plot
flat band potential(EFB)
Abstract
The electrochemical behaviors of passive film formed on 316L stainless steel and 690 alloy in NaOH solution were studied by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and capacitance measurements. The results showed that there were significant differences between polarization curves of the two materials in NaOH solution. 316L stainless steel had a wide passive anodic region from 100 mV to 900 mV in NaOH solution. The impedance value of the passive film on 316L stainless steel in NaOH solution was similar to that of 690 alloy. Potentiodynamic electrochemical impedance spectroscopy (DEIS) results demonstrated that with the increase of potential the variation trend of passive film was different. The results of the DEIS were in accordance with the potentiodynamic polarization curves. Mott-Schottky analysis showed that EFB of the passive film on 316L stainless steel in NaOH solution was 0 V, however EFB of the passive film on 690 alloy in NaOH solution was -0.3 V. The properties of the film formed on 690 alloy in NaOH solution were different from those on of 316L stainless steel.
中图分类号 TG172.6
所属栏目 试验研究
基金项目 国家自然科学基金(No.50871020); 国家科技基础条件平台建设项目(No.2005DKA10400)资助
收稿日期 2010/5/31
修改稿日期 2010/7/5
网络出版日期
作者单位点击查看
备注李晓刚, 教授,
引用该论文: LI Cheng-tao,LI Xiao-gang,CHENG Xue-qun,DONG Chao-fang. Electrochemical Properties of 316L Stainless Steel and 690 Alloy in NaOH Solution[J]. Corrosion & Protection, 2011, 32(4): 252
被引情况:
【1】龚嶷,徐雪莲, "压水堆核电厂蒸汽发生器老化机理及其影响因素",腐蚀与防护 35, 163-168(2014)
【2】黄世新,杜楠,赵晴,艾莹珺,王力强,文庆杰, "Fe3+水解及其对304不锈钢点蚀行为的影响",腐蚀与防护 37, 453-457(2016)
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【3】Thomas M Angeliu, Gary S Was. Behavior of grain boundary chemistry and precipitates upon thermal treatment of controlled purity alloy 690[J]. Metallurgical Transactions A, 1990, 21: 2097-2107.
【4】程学群, 李晓刚, 杜翠微, 等. 316L不锈钢在醋酸溶液中的钝化膜电化学性质[J]. 北京科技大学学报, 2007, 29(9): 911-915.
【5】程学群, 李晓刚, 杜翠微. 316L和2205不锈钢在醋酸溶液中的钝化膜的生长及其半导体属性的研究[J]. 科学通报, 2009, 54(1): 104-109.
【6】Hwang S S, Kim U C, Park Y S . The effects of Pb on the passive film of Ni-base alloy in high temperature water[J]. Journal of Nuclear Materials, 1997, 246(1): 77-83.
【7】Peng B, Lu B T, Luo J L, et al. Investigation of passive films on nickel alloy 690 in lead-containing environments[J]. Journal of Nuclear Materials, 2008, 378(3): 333-340.
【8】Montemor M F, Ferreira M G S, Walls M, et al. Inuence of pH on properties of oxide lms formed on type 316L stainless steel, alloy 600, and alloy 690 in high-temperature aqueous environments[J]. Corrosion, 2003, 59 (1): 11-21.
【9】Montemor M F, Ferreira M G S, Hakiki N E, et al. Chemical composition and electronic structure of the oxide lms formed on 316L stainless steel and nickel based alloys in high temperature aqueous environments[J]. Corrosion science, 2000, 42 (9): 1635-1650.
【10】Ries L A S, Belo M D C, Ferreira M G S, et al. Chemical composition and electronic structure of passive lms formed on Alloy 600 in acidic solution[J]. Corrosion science, 2008, 50 (4): 968-977.
【11】Belo M D C, Hakiki N E, Ferreira M G S. Semiconducting properties of passive lms formed on nickel-base alloys type alloy 600: Inuence of the alloying elements[J]. Electrochimica Acta, 1999, 44 (14): 2473-2481.
【12】Sun M C, Wu X Q, Zhang Z E, et al. Oxidation of 316 stainless steel in supercritical water[J]. Corrosion science, 2009, 51 (5): 1069-1072.
【13】Goodlet G, Faty S, Cardoso S, et al. The electronic properties of spultered chromium and iron oxide films[J]. Corrosion science, 2004, 46 (6): 1479-1499.
【14】Sánchez M, Gregori J, Alonso C, et al. Electrochemical impedance spectroscopy for studying passive layers on steel rebars immersed in alkaline solutions simulating concrete pores[J]. Electrochimica Acta, 2007, 52(27): 7634-7641.
【15】Abreu C M, Díaz B, Joiret S, et al. Comparative study of passive films of different stainless steels developed on alkaline medium[J]. Electrochimica Acta, 2004, 49(17/18): 3049-3056.
【16】El-Egamy S S, Badaway W A. Passivity and passivity breakdown of 304 stainless steel in alkaline sodium sulphate solutions[J]. Journal of Applied Electrochemistry, 2004, 34(11): 1153-1158.
【17】Alves V A, Brett C M A. Characterisation of passive filmes formed on mild steels in bicarbonate solution by EIS[J]. Electrochimica Acta, 2002, 47(13-14): 2081-2091.
【18】Sikora J, Sikora E, Macdonald D D. The electronic structure of the passive film on tungsten[J]. Electrochimica Acta, 2000, 45(12): 1875-1883.
【19】Montemor M F, Ferreira M G S, Hakiki N E, et al. Semiconducting properties of thermally grown oxide films on AISI 304 stainless steel[J]. Corrosion science, 2000, 42(4): 687-702.
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