摘要
通过增重法、光学显微镜、动电位极化曲线、电化学阻抗谱、Mott-Schottky曲线等方法,在含不同Cl-浓度(0.01、0.10、1.00mol/L)1mol/L NaOH溶液中研究了工业纯钛TA2的腐蚀质量增加、腐蚀形貌及电化学特性,分析了Cl-浓度对其腐蚀行为的影响。结果表明:TA2在含NaCl的强碱溶液中具有良好的耐腐蚀性能,随着Cl-浓度增大,自腐蚀电位下降,腐蚀电流密度和钝化电流密度增大,TA2耐腐蚀性能降低;Cl-对阴极析氢反应的影响不明显,而随着Cl-浓度增大,阴极吸氧腐蚀电流密度先增大后减小;TA2表面钝化膜呈n型半导体,对Cl-有较强的耐腐蚀能力。
The corrosion mass gain,corrosion morphology and electrochemical characteristics of commercial pure titanium TA2 in 1 mol/L NaOH solution with different Cl- concentrations(0.01,0.10 and 1.00 mol/L)were studied by means of weight gain method,optical microscopy,potentiodynamic polarization curves,electrochemical impendance spectra and Mott-Schottky curves.And the effect of Cl- concentration on the corrosion behavior of the TA2 was analyzed.The results indicate that the TA2 had excellent corrosion resistance in NaOH solution containing Cl-.With the increase of Cl- concentration,corrosion potential decreased,while both the current density and the passive current density increased,which indicated the corrosion resistance of the TA2 decreased. When the concentration of Cl-increased,the hydrogen evolution reaction on cathode had little effect,while the cathode oxygen absorption corrosion current density first increased and then decreased.The passive film on the surface of TA2 was ntype semiconductor,which had strong corrosion resistance to Cl-.
作者
肖光桥
王阳
孔令真
张联合
王奎升
XIAO Guangqiao;WANG Yang;KONG Lingzhen;ZHANG Lianhe;WANG Kuisheng(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing l00029,China;Beijing Aerospace Petrochemical Technology and Equipment Engineering Corporation Limited,Beijing 100076 China;College of Mechanical Enginecring,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Qilu Branch Company,SNOPEC,Zibo 255411.China)
出处
《腐蚀与防护》
CAS
北大核心
2021年第2期14-18,共5页
Corrosion & Protection
