pH值、温度和盐度对B30铜镍合金在海水中成膜的影响  

Effects of pH Value,Temperature and Salinity on Film Formation of B30 Cu-Ni Alloy in Seawater

作　　者：陈翰林 马力 黄国胜 杜敏[1] CHEN Hanlin;MA Li;HUANG Guosheng;DU Min(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(LSMRI),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]中国船舶集团有限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》2023年第3期481-493,共13页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(U1706221)。

摘　　要：对B30铜镍合金在海水中成膜的影响因素进行研究,确定最佳成膜条件,从而抑制B30铜镍合金在使用过程中发生点蚀等严重腐蚀损坏现象。采用电化学阻抗谱(EIS)、X射线光电子能谱(XPS)和激光共聚焦显微镜(CLSM)等方法研究了海水的p H、温度以及盐度对B30铜镍合金成膜的影响。在pH为6.6~9.8的海水中,随着pH值的增大,膜层致密性、完整性及保护性呈现先变好再变差的趋势;温度在2~36℃的范围内,随着海水中温度的提高,膜层呈现先变差再变好的趋势;盐度在20~36的范围内,随着盐度的提高,膜层呈现先变差再变好的趋势。pH以及盐度对B30铜镍合金的腐蚀影响较大。综合试样的腐蚀状况以及膜层测试,B30铜镍合金在盐度为20的海水中表面形成的膜层最为致密。The effect of pH value,temperature and salinity of seawater on the film formation of B30 Cu-Ni alloy were studied by EIS,XPS and CLSM.The results showed that with the increase of pH value within the range of 6.6-9.8,the film quality first became better and then worse;with the increase of the temperature within the range of 2-36℃,the quality of the film became worse first and then better;with the increase of salinity within the range of 20-36,the quality of the film became worse first and then better.The pH and salinity had a strong influence on the corrosion of B30 copper nickel alloy.Therefore,considering comprehensively the corrosion morphology of the alloy and the quality of the corresponding film formed on the surface,can produce the most compact and effective passivation film can be produced on the surface of B30 Cu-Ni alloy in the seawater with salinity of 20.

关 键 词：B30铜镍合金 成膜 PH 温度 盐度 

分 类 号：TG174[金属学及工艺—金属表面处理]