采用动电位极化曲线、电化学阻抗谱(EIS)、浸泡实验等方法研究了交流电流密度(0-100 A/m2)对X70钢电化学行为的影响,采用OM和SEM观测了X70钢交流腐蚀产物及蚀坑形貌,探讨了交流电诱发金属腐蚀的机理.结果表明,在交流电影响下,X70钢的腐蚀电位向负向偏移,偏移量和腐蚀速率随着交流电流密度的增大而增大.低电流密度下,X70钢的EIS特征为容抗弧,没有出现明显的感抗特征及扩散特征,在低电流密度下X70钢表面发生了均匀腐蚀.当交流电流密度增大时,EIS低频区出现Warburg阻抗特征,表明试样表面的腐蚀过程由扩散控制,局部腐蚀特征明显.交流电对金属极化作用产生重要影响,交流电正、负半周期内的极化效果不对称诱发了金属腐蚀.
参考文献
[1] | Buchler M,Schoneich H G,Stalder F.15th Biennial Joint Technical Meeting on Pipeline Research,Orlando,PRCI:2005:16 |
[2] | Wakelin R G,Gummov R A,Segall S M.Corrosion 1998,Houston:NACE,1998:565 |
[3] | Buchler M,Stalder F,Schoneich H G.Ceocor-2004 International Colloquium,Sector A,Dresden:Ceocor,2004:59 |
[4] | Goidanich S,Lazzari L,Ormellese M,Pedeferri M P.16th International Corrosion Congress,Beijing:CSCP,2005:16 |
[5] | Linhardt P,Ball G.Corrosion 2006,Houston:NACE,2006:160 |
[6] | Li Z L,Yang Y.CIESC J,2011; 62:1790(李自力,杨燕.化工学报,2011:62:1790) |
[7] | Li Z L,Yang Y.Acta Petrol Sin,2012; 33:164(李自力,杨燕.石油学报,2012:33:164) |
[8] | Du C Y,Cao B,Wu Y S.Corros Prot,2009; 30:655(杜晨阳,曹备,吴荫顺.腐蚀与防护,2009; 30:655) |
[9] | Wu Y S,Cao B.Cathodic and Anodic Protection—Principles,Techniques and Engineering Applications.Beijing:China Petrochemical Press,2007:212(吴荫顺,曹备.阴极保护和阳极保护 原理、技术及工程应用.北京:中国石化出版社,2007:212) |
[10] | Biase L D,Fumei O,Cigna R.Corrosion 2010,Houston:NACE,2010:108 |
[11] | Goidanich S,Lazzari L,Ormellese M.Corros Sci,2009;52:916 |
[12] | Fu A Q,Cheng Y F.Corros Sci,2010;52:612 |
[13] | Jiang Z T,Du Y X,Dong L,Lu M X.Acta Metall Sin,2011; 47:997(姜子涛,杜艳霞,董亮,路民旭.金属学报,2011:47:997) |
[14] | Weng Y J,Wang N.J Chin Soc Corrro Prot,2011; 31:270(翁永基,王宁.中国腐蚀与防护学报,2011:31:270) |
[15] | Xu L Y,Su X,Yin Z X,Tang Y H,Cheng Y F.Corros Sci,2012; 61:215 |
[16] | Gellings P J.Electrochim Acta,1962; 7:19 |
[17] | Xiao H,Lalvani S B.J Electrochem Soc,2008; 155:C69 |
[18] | Zhang R,Vairavanathan P R,Lalvani S B.Corros Sci,2008; 50:1664 |
[19] | Li M C,Cheng Y F.Electrochim Acta,2007; 52:8111 |
[20] | Gu B,Luo J,Mao X.Corrosion 1990,Houston:NACE,1990:96 |
[21] | Zhao W M,Wang Y.Acta Metall Sin,2008; 44:1125(赵为民,王勇.金属学报,2008; 44:1125) |
[22] | Cao C N.Introduction of Electrochemical Impedence Spectra.Beijing:Science Press,2002:76(曹楚南.电化学阻抗谱导论.北京:科学出版社,2002:76) |
[23] | Liu Z Y,Dong C F,Jia Z J,Li X G.Acta Metall Sin,2011; 47:1009(刘志勇,董超芳,贾志军,李晓刚.金属学报,2011:47:1009) |
[24] | Li D G,Zhu J W,Zheng M S,Feng Y R,Bai Z Q.Acta Metall Sin,2008; 44:739(李党国,朱杰武,郑茂盛,冯耀荣,白真权.金属学报,2008; 44:739) |
[25] | Nielsen L V,Nielsen K V,Baumgarten B.Corrosion 2004,Houston:NACE,2005:211 |
[26] | Nielsen L V.Corrosion 2005,Houston:NACE,2005:188 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%