B10铜镍合金在高浓度NH_(4)^(+)污染海水中腐蚀研究  

Corrosion of B10 Cu-Ni Alloy in Seawater Polluted by High Concentration of NH_(4)^(+)

作　　者：王家明 杨昊东 杜敏[1] 彭文山 陈翰林 郭为民[2] 蔺存国[2] WANG Jiaming;YANG Haodong;DU Min;PENG Wenshan;CHEN Hanlin;GUO Weimin;LIN Cunguo(Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China;State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute,Qingdao 266237,China)

机构地区：[1]中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室,青岛266100 [2]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,青岛266237

出　　处：《中国腐蚀与防护学报》2021年第5期609-616,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(U1706221)。

摘　　要：通过比较B10铜镍合金在天然海水和含10 mg/L NH_(4)^(+)海水中的腐蚀行为,研究NH_(4)^(+)对B10铜镍合金的腐蚀影响机制。采用失重法测量平均腐蚀速率;采用动电位极化分析、电化学阻抗谱(EIS)研究界面腐蚀电化学特征;采用扫描电子显微镜(SEM)表征腐蚀产物形貌;采用能量色散光谱(EDS)和X射线光电子能谱(XPS)分析腐蚀产物成分。结果表明,NH_(4)^(+)的添加降低了腐蚀产物中具有保护作用的Cu_(2)O成分的含量,提高了B10铜镍合金在海水中的腐蚀速率,促进了点蚀的发生。B10 Cu-Ni alloy is widely used in condenser and other facilities due to its good corrosion resistance in sea water.In practical application,it was found that the concentration of NH_(4)^(+)was relatively high in sea water in the off shore port area and B10 Cu-Ni alloy was more likely to perforate.In this paper,the corrosion behavior of B10 Cu-Ni alloy in natural seawater and seawater containing 10 mg/L NH_(4)^(+)was comparatively studied,in order to clarify the influence mechanism of NH_(4)^(+)on the corrosion of B10 Cu-Ni alloy.The average corrosion rate,electrochemical characteristics,morphology and chemical composition of corrosion products of the steel were characterized by means of mass loss method,potentiodynamic polarization,electrochemical impedance spectroscopy(EIS),scanning electron microscope(SEM)with EDS and X-ray photoelectron spectroscopy(XPS).The results indicated that the addition of NH_(4)^(+)reduced the content of protective Cu_(2)O in the corrosion products,thus increasing the corrosion rate of B10 Cu-Ni alloy in seawater and promoting the pitting tendency.

关 键 词：NH_(4)^(+)污染 海水 B10铜镍合金 Cu_(2)O 腐蚀产物膜 

分 类 号：TG174[金属学及工艺—金属表面处理]