不同含水量红壤中X80管道钢的腐蚀行为  

Corrosion Behavior of X80 Pipeline Steel in Red Soil with Different Water Content

作　　者：门立国 霍冠良 秦龙龙 马玉宝 闫茂成[3] 陈利琼[1] MEN Liguo;HUO Guanliang;QIN Longlong;MA Yubao;YAN Maocheng;CHEN Liqiong(Southwest Petroleum University,Chengdu 610599,China;Southwest Pipeline Co.,Ltd.,National Pipe Network Group,Chengdu 610000,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]西南石油大学,成都610599 [2]国家管网集团西南管道有限责任公司,成都610000 [3]中国科学院金属研究所,沈阳110016

出　　处：《腐蚀与防护》2023年第5期1-6,共6页Corrosion & Protection

基　　金：国家自然科学基金(2005DKA10400)。

摘　　要：通过开路电位、动电位极化曲线、电化学阻抗谱等电化学测试研究了不同含水量红壤中X80管道钢的腐蚀行为。结果表明:X80管道钢的自腐蚀电位、腐蚀速率、腐蚀类型均与红壤含水量及X80管道钢表面吸附薄液膜密切相关。随红壤含水量增大,X80管道钢表面吸附液膜的连续性增大,开路电位下降,腐蚀电流密度增大,X80管道钢的腐蚀模式从局部腐蚀变为均匀腐蚀。The corrosion behavior of X80 pipeline steel in red soil with different water content were studied by electrochemical testing,including open circuit potential,potentiodynamic polarization curves and electrochemical impedance spectroscopy.The results showed that the free corrosion potential,corrosion rate and corrosion type of X80 pipeline steel were closely related to the water content of red soil and the thin liquid film adsorbed on the surface of X80 pipeline steel.With the increase of water content of red soil,the continuity of adsorbed liquid film on the surface of X80 pipeline steel increased,the open circuit potential decreased and the corrosion current density increased.With the increase of water content of red soil,the corrosion mode of X80 pipeline steel changed from localized corrosion to uniform corrosion.

关 键 词：管道钢 土壤腐蚀 红壤 含水量 薄液膜 

分 类 号：TG172[金属学及工艺—金属表面处理]