干旱区生态环境知识资源中心(Arid): X70管线钢楔型缝隙的阴极极化特性

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	X70管线钢楔型缝隙的阴极极化特性
其他题名	CATHODIC POLARIZATION CHARACTERISTIC OF WEDGE-SHAPED CREVICE OF X70 PIPELINE STEEL
	宋义全 1; 杜翠薇 1; 张新 2; 李晓刚 1
ISSN	0412-1961
出版年	2006
卷号	42 期号:3 页码:305-310
中文摘要	应用楔型缝隙模型研究了X70管线钢在新疆库尔勒土壤模拟溶液中的阴极极化特性．研究了极化时间（130h）、缝口控电位（-775，-925和-1075mV（V8SCE））和缝口尺寸（0．15，0．30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．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．
英文摘要	Cathodic polarization characteristic of a wedge-shaped crevice of X70 pipeline steel was studied under impressed current cathodic protection in simulated solution of desert soil of Ku＇erle in Xinjiang of China. The influences of applied control potentials （-775 mV, -925 mV） and -1075 mV （vs SCE）） and crevice thicknesses （0.15 mm, 0.30 mm and 0.45 mm） on polarization potentials, polarization current and pH value in crevice were investigated. It was shown that the gradients of polarization potential and current in crevice gradually decreased with time. Moreover, with lowering of opening control potential and growing of crevice opening thickness, the polarization potentials in crevice decreased and the polarization current and the pH value in crevice increased. More negative shift of the control potentials and bigger crevice opening thickness can make the growth rate of pH value decrease.
中文关键词	X70管线钢 ; 缝隙腐蚀 ; 阴极极化 ; 极化电位 ; 极化电流
英文关键词	X70 pipeline steel crevice corrosion cathodic polarization polarization potential polarization current
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METALLURGY METALLURGICAL ENGINEERING
WOS研究方向	Metallurgy & Metallurgical Engineering
CSCD记录号	CSCD:2341540
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219903
作者单位	1.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, 中国; 2.内蒙古科技大学材料科学与工程学院, 包头, 内蒙古 014010, 中国
推荐引用方式 GB/T 7714	宋义全,杜翠薇,张新,等. X70管线钢楔型缝隙的阴极极化特性[J],2006,42(3):305-310.
APA	宋义全,杜翠薇,张新,&李晓刚.(2006).X70管线钢楔型缝隙的阴极极化特性.,42(3),305-310.
MLA	宋义全,et al."X70管线钢楔型缝隙的阴极极化特性".42.3(2006):305-310.