Ni对Zr-Cu-Al系非晶合金在NaCl溶液中耐腐蚀性能的影响  

Effect of Ni on Corrosion Behavior of Zr-Cu-Al Amorphous Alloys in NaCl Solution

作　　者：甘有祎 刘昊[2] 李广[1,3] 石玗 马利锋[3] 赵燕春 刘明[3] 张建斌 Gan Youyi;Liu Hao;Li Guang;Shi Yu;Ma Lifeng;Zhao Yanchun;Liu Ming;Zhang Jianbin(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [3]西安交通大学机械结构强度与振动国家重点实验室,陕西西安710049

出　　处：《稀有金属材料与工程》2022年第2期712-718,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51961022,51405478,52061027);甘肃省引导科技创新发展专项(2019ZX-08);甘肃省重点研发计划(20YF3WA017);中国博士后科学基金(2017M623153)。

摘　　要：利用动电位极化和电化学阻抗谱研究了Ni元素对Zr-Cu-Al系非晶合金在3.5%NaCl(质量分数)中性溶液中的电化学腐蚀行为的影响规律。结果表明:含Ni元素的Zr_(55)Cu_(30)Ni_(5)Al_(10)比Zr_(55)Cu_(35)Al_(10)非晶合金在NaCl溶液中具有更优异的耐腐蚀性能。Zr-Cu-Al系非晶合金在NaCl溶液中发生点腐蚀,圆形腐蚀坑内布满泡沫状孔洞。通过腐蚀前后的元素分布对比,发现Zr-Cu-Al非晶合金在Cl-作用下合金元素选择性溶解。含Ni元素的非晶合金形成致密的钝化膜,抑制了金属元素的选择性溶解,从而提高了耐腐蚀性能。研究结果可为耐Cl-环境腐蚀非晶合金成分设计及其应用提供参考。The effect of Ni on the electrochemical corrosion behavior of Zr-Cu-Al amorphous alloys in 3.5%NaCl neutral solution was investigated by potentiometric polarization and electrochemical impedance spectroscopy.The results show that the Zr_(55)Cu_(30)Ni_(5)Al_(10) amorphous alloy containing Ni element has better corrosion resistance than Zr_(55)Cu_(35)Al_(10) amorphous alloy in NaCl solution.The Zr-Cu-Al amorphous alloys generate pitting corrosion in NaCl solution,and the circular corrosion pit is filled with foam-like holes.Compared with the elemental distribution of Zr-Cu-Al amorphous alloys before and after corrosion,the alloying elements are selectively dissolved because of Cl-.Amorphous alloys containing Ni elements form a dense passivation film,which inhibits the selective dissolution of metal elements,thereby improving corrosion resistance.The results can provide reference for the composition design and application of Cl-resistant amorphous alloys.

关 键 词：非晶合金 电化学测试 氯离子 点腐蚀 腐蚀坑形貌 

分 类 号：TG139.8[一般工业技术—材料科学与工程]