| Q235管线钢焊接接头微区电化学行为 |
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| 引用本文： | 孙齐磊,曹备,吴荫顺.Q235管线钢焊接接头微区电化学行为[J].北京科技大学学报,2009,31(1). |
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| 作者姓名： | 孙齐磊 曹备 吴荫顺 |
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| 作者单位： | 北京科技大学材料科学与工程学院腐蚀与防护中心,北京,100083 |
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| 摘 要： | 研究了燃气旧管道Q235管线钢焊接接头各个微观区域在土壤模拟溶液中的电化学行为.测量了各个微区的极化曲线,测定了相关的电化学参数.结果表明,各区域的Ecorr由低至高和icorr由大至小的顺序依次为:熔合线,不完全正火区,过热区,正火区,回火区,母材,焊缝区.同一个焊接接头的七个不同热经历区域暴露于同一电解质时,也将构成一个多电极体系.其中,熔合线和不完全正火区将成为复杂多电极体系形成的原电池中的阳极,最可能遭受到优先的腐蚀溶解;焊缝区和母材区则是原电池中的阴极,腐蚀敏感性低且在一定程度上受到阴极保护.
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| 关 键 词： | Q235钢 焊接接头 极化曲线 微区电化学 多电极体系 |
Electrochemical behavior of various micro-areas on the welded joint of Q235 steel |
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| SUN Qi-lei,CAO Bei,WU Yin-shun.Electrochemical behavior of various micro-areas on the welded joint of Q235 steel[J].Journal of University of Science and Technology Beijing,2009,31(1). |
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| Authors: | SUN Qi-lei CAO Bei WU Yin-shun |
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| Abstract: | The electrochemical behavior of welded joints of used Q235 pipeline steel was investigated in soil simulation solution.Polarization curves of various micro-areas were measured and related electrochemical parameters were acquired.The results show that the sequence of free corrosion potential from lower to higher or the sequence of free corrosion current density from higher to lower is melt run,incomplete normalized zone,overheated zone,normalized zone,tempered zone,base metal,and weld metal.These micro-areas... |
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| Keywords: | Q235 steel welded joint polarization curve electrochemistry of micro-area multiple electrode system |
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