金属学报  2006, Vol. 42 Issue (3): 305-310

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X70管线钢楔型缝隙的阴极极化特性

宋义全;杜翠薇;张新;李晓刚

北京科技大学腐蚀与防护中心北京市腐蚀、磨蚀与表面工程重点实验室;北京100083;内蒙古科技大学材料科学与工程学院; 包头 014010

CATHODIC POLARIZATION AGAINST CREVICE CORROSION OF X70 PIPELINE STEEL IN SIMULATED SOLUTION OF KU'ERLE SOIL IN XINJIANG

SONG Yiquan; DU Cuiwei;ZHANG Xin; LI Xiaogang

宋义全; 杜翠薇; 张新; 李晓刚 . X70管线钢楔型缝隙的阴极极化特性[J]. 金属学报, 2006, 42(3): 305-310 .
, , , . CATHODIC POLARIZATION AGAINST CREVICE CORROSION OF X70 PIPELINE STEEL IN SIMULATED SOLUTION OF KU'ERLE SOIL IN XINJIANG[J]. Acta Metall Sin, 2006, 42(3): 305-310 .

摘要 参考文献 相关文章 Metrics 全文: PDF(312 KB)   摘要: 应用了楔型缝隙模型模拟了具有剥离涂层缺陷的X70管线钢在阴极极化条件下于新疆库尔勒土壤模拟溶液中的缝隙腐蚀。研究了极化时间(1~30h)、缝口控电位 (-850mV、-1000mV和-1150mV vs CSE)和缝口尺寸(0.15mm、0.30mm和0.45mm)等因素对缝内的极化电位、极化电流以及对应介质pH值的影响。实验结果表明，随着极化时间的延长，从缝口到缝底的极化电位梯度和极化电流梯度逐渐减小；随着缝口控电位的降低和缝口尺寸的增大，缝内试样的极化电位逐渐降低，而极化电流却逐渐增大，缝内试样对应介质的pH值也逐渐提高，进一步降低缝口控电位与增加缝口尺寸将使pH值的增加速度减小。 关键词 ： 缝隙腐蚀,  X70管线钢,  阴极极化,  极化电位,  极     Abstract：A wedge-shaped crevice cell used to model previously disbonded coating holiday of X70 pipeline steel under impressed current cathodic protection in simulated solution of desert soil of Ku’erle in Xinjiang. Distributions of polarization potentials and current along long direction of the wedge-shaped crevice were measured in different time intervals at different opening control potentials (-850mV, -1000mV and -1150mV vs CSE) and at different crevice opening thickness (0.15mm, 0.30mm and 0.45mm). The influences of applied control potentials and crevice thickness on polarization potentials, polarization current and pH value in crevice were investigated deeply. It was showed that gradients of polarization potential and current in crevice gradually decreased with times, due to the depletion of dissolved oxygen. It was found again that, a negative shift of opening control potentials, and increase of crevice opening thickness resulted in the decrease of polarization potentials, and the increase of polarization current in crevice. On the other hand, the pH value in crevice gradually increased also with more negative opening control potential, and with increase of the opening thickness. At the same control potential, the pH value from crevice opening to bottom increased first, then stabilized at a definite value. Moreover, more negative shift of the control potentials and bigger crevice opening thickness can make the stable pH value increase, but the increasing rate gradually decreased. Key words： crevice corrosion    X70 pipeline steel    cathodic polarization    polarization potentials    polarization curr 收稿日期: 2005-06-10      ZTFLH:  TG171   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 宋义全 杜翠薇 张新 李晓刚 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2006/V42/I3/305 [1] Toncre A C. Mater Perform, 1984; 23(8): 22 [2] Gan F, Sun Z W, Sabde G , Chin D T. Corrosion, 1994; 50: 804 [3] Han X P. Nat Gas Ind, 2001; 21(1): 108 (韩兴平．天然气工业,2001;21(1):108) [4] Peterson M H, Lennox T J. Corrosion, 1973; 29: 406 [5] Toncre A C, Ahmad N. Mater Perform, 1980; 19(6): 39 [6] Turnball A, May A T. Mater Perform, 1983; 22(10): 34 [7] Fessle R R, Markworth A J, Parkins R N. Corrosion, 1983; 39: 20 [8] Perdomo J J, Song I. Corros Sci, 2000; 42: 1389 [9] Li Z F, Gan F X, Mao X H. Corros Sci, 2002; 44: 689 [10] Margarit I C P , Mattos O R. Electrochim Acta, 1998; 44: 363 [11] Li Z F, Mao X H, Gan F X. J Chin Soc Corros Protect, 2000; 20: 129 (李正奉,毛旭辉,甘复兴．中国腐蚀与防护学报, 2000;20: 129) [12] Zhu R Z. Corrosion of Metals. Beijing: Metallurgical Industry Press, 1993: 103 (朱日彰．金属腐蚀学．北京:冶金工业出版社, 1993:103) [1] 司永礼, 薛金涛, 王幸福, 梁驹华, 史子木, 韩福生. Cr添加对孪生诱发塑性钢腐蚀行为的影响[J]. 金属学报, 2023, 59(7): 905-914. [2] 于少霞, 王麒, 邓想涛, 王昭东. GH3600镍基高温合金极薄带的制备及尺寸效应[J]. 金属学报, 2023, 59(10): 1365-1375. [3] 樊永霞, 王建, 张学哲, 王建忠, 汤慧萍. SEBM成形片状极小曲面点阵材料的力学性能[J]. 金属学报, 2021, 57(7): 871-879. [4] 孙佳孝, 杨可, 王秋雨, 季珊林, 包晔峰, 潘杰. 5356铝合金TIG电弧增材制造组织与力学性能[J]. 金属学报, 2021, 57(5): 665-674. [5] 黄一川, 王清, 张爽, 董闯, 吴爱民, 林国强. 用于燃料电池双极板的不锈钢成分优化[J]. 金属学报, 2021, 57(5): 651-664. [6] 朱敏, 欧阳柳章. 镁基储氢合金动力学调控及电化学性能[J]. 金属学报, 2021, 57(11): 1416-1428. [7] 王富强, 刘伟, 王兆文. 铝电解槽中局部阴极电流增大对电解质-铝液两相流场的影响[J]. 金属学报, 2020, 56(7): 1047-1056. [8] 孙飞龙, 耿克, 俞峰, 罗海文. 超洁净轴承钢中夹杂物与滚动接触疲劳寿命的关系[J]. 金属学报, 2020, 56(5): 693-703. [9] 李玲,姚生莲,赵晓丽,杨佳佳,王野熹,王鲁宁. 阳极氧化法制备Zr-17Nb合金表面氧化物纳米管阵列及其性能研究[J]. 金属学报, 2019, 55(8): 1008-1018. [10] 李亚东,李强,唐晓,李焰. X80管线钢焊接接头的模拟重构及电偶腐蚀行为表征[J]. 金属学报, 2019, 55(6): 801-810. [11] 马荣耀, 赵林, 王长罡, 穆鑫, 魏欣, 董俊华, 柯伟. 静水压力对金属腐蚀热力学及动力学的影响[J]. 金属学报, 2019, 55(2): 281-290. [12] 田银宝, 申俊琦, 胡绳荪, 勾健. 丝材+电弧增材制造钛/铝异种金属反应层的研究[J]. 金属学报, 2019, 55(11): 1407-1416. [13] 张敏, 慕二龙, 王晓伟, 韩挺, 罗海龙. TA1/Cu/X65复合板焊接接头微观组织及力学性能[J]. 金属学报, 2018, 54(7): 1068-1076. [14] 黄明亮, 孙洪羽. 倒装芯片无铅凸点β-Sn晶粒取向与电迁移交互作用[J]. 金属学报, 2018, 54(7): 1077-1086. [15] 马政, 陆喜, 高明, 谭丽丽, 杨柯. 缝隙腐蚀对Fe-30Mn-1C合金降解速率的影响[J]. 金属学报, 2018, 54(7): 1010-1018. Viewed Full text Abstract Cited   Shared      Discussed