Corrosion Behavior of Commercial Pure Titanium in Alkali Containing Chloride Ion
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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、1.00 mol/L）1 mol/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。Abstract: 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 n-type semiconductor, which had strong corrosion resistance to Cl-.
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Keywords:
- TA2 /
- NaOH /
- corrosion /
- electrochemical property
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[1] 余存烨. 石化钛设备腐蚀实例[J]. 腐蚀与防护,2008,29(4):232-235. [2] 王娅婷,林乃明,唐宾. 钛及钛合金热氧化工艺的研究现状[J]. 腐蚀与防护,2014,35(10):965-970. [3] 颜润浦,赵吉庆,杨钢,等. 工业纯钛在盐酸中的腐蚀行为[J]. 腐蚀与防护,2015,36(2):182-186,196. [4] 龚敏,蒋伟,邹振,等. 两碱法对钛材在盐卤中腐蚀行为的影响[J]. 中国腐蚀与防护学报,2009,29(3):191-198. [5] WANG Z B,HU H X,LIU C B,et al. The effect of fluoride ions on the corrosion behavior of pure titanium in 0.05 M sulfuric acid[J]. Electrochimica Acta,2014,135:526-535.
[6] HSU H C,WU S C,HSU S K,et al. Surface modification of commercially pure Ti treated with aqueous NaOH treatment and ethyl alcohol aging[J]. Journal of Medical and Biological Engineering,2013,33(3):331-336.
[7] 石林,郑志军,高岩. 不锈钢的点蚀机理及研究方法[J]. 材料导报,2015,29(23):79-85. [8] 张鸣伦,王丹,王兴发,等. 海水环境中Cl-浓度对316L不锈钢腐蚀行为的影响[J]. 材料保护,2019,52(1):34-39. [9] 陈范才,曾建皇,周海晖,等. 离子注入对钛电极析氢活性的影响[J]. 中国有色金属学报,2001,11(2):315-318. [10] 王凤平,康万利,敬和民,等. 腐蚀电化学原理、方法及应用[M]. 北京:化学工业出版社,2008. [11] 曹楚南. 腐蚀电化学原理[M]. 3版.北京:化学工业出版社,2008. [12] LI J Q,LIN X,GUO P F,et al. Electrochemical behaviour of laser solid formed Ti-6Al-4V alloy in a highly concentrated NaCl solution[J]. Corrosion Science,2018,142:161-174.
[13] 李树伟,章莎,方金祥,等. Cl-对高氮不锈钢在0.5 mol/L NaOH溶液中腐蚀行为的影响[J]. 腐蚀与防护,2017,38(8):583-588. [14] 赵天雷,路伟,吕海武,等. 10号碳钢在NaOH溶液中的腐蚀电化学行为[J]. 腐蚀与防护,2018,39(11):833-837,842. [15] 梁伟,谢俊峰,王雅倩,等. 苛刻工况条件下钛合金管材的腐蚀电化学特性研究[J]. 热加工工艺,2018,47(6):98-102. [16] 庄朋强,肖占文,朱向东,等. 钽阳极氧化膜的半导体性研究[J]. 电子元件与材料,2011,30(8):35-39. [17] 李成涛,李晓刚,程学群,等. 316L不锈钢、690合金在氢氧化钠溶液中的电化学性能[J]. 腐蚀与防护,2011,32(4):252-255,271. [18] DE MATHIS A,ROCCA E,VEYS-RENAUX D,et al. Electrochemical behaviour of titanium in KOH at high potential[J]. Electrochimica Acta,2016,202:253-261.
[19] 吴全兴. 钛的变色机理及建材用难变色钛板的开发[J]. 稀有金属快报,2007,26(4):43-44. [20] 李宁,叶建林,张成,等. 纯钛温度计套管在含盐酸介质中表面变色原因分析[J]. 钛工业进展,2015,32(2):40-43.
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