CdSe-TiO2复合材料对304不锈钢的光生阴极保护性能
Photogenerated Cathodic Protection Properties of CdSe-TiO2 Composite Material on 304 Stainless Steel
摘 要
采用电化学二次阳极氧化法制备了二氧化钛纳米管,采用动电位沉积法在纳米管上进行CdSe沉积;采用扫描电镜(SEM)、X射线衍射(XRD)等测试方法来观察复合材料的表面形貌与晶相特征.采用开路电位(OCP)、电化学阻抗谱(EIS)、Tafel极化曲线等电化学方法来研究其光电转化性能及其对304不锈钢的阴极保护效果.结果表明,可见光照射下,304不锈钢的开路电位从-190 mV(SCE)降至约-500 mV(SCE),闭光后,电极电位缓慢上升至约-250 mV(SCE),说明暗态下材料仍能维持对不锈钢的保护作用.在可见光范围内,与纯二氧化钛相比,制备的CdSe-TiO2复合材料对304不锈钢的阴极保护性能显著提高.
CdSe-TiO2复合材料
腐蚀
不锈钢
电化学
photogenerated cathodic protection
CdSe-TiO2 composite material
corrosion
stainless steel
electrochemistry
Abstract
TiO2 nanotubes were fabricated by two-step anode oxidation method,and CdSe was deposited on the nanotubes by potentiodynamic deposition.Scanning electron microscopy (SEM),X ray diffraction (XRD) test methods were used to observe the surface morphology and phase characteristics of the composite material.According to the open circuit potential (OCP),electrochemical impedance spectroscopy (EIS),Tafel polarization curve and other electrochemical methods,the optical properties of the composite and its cathodic protection effect on 304 stainless steel were investigated.The results showed that,under visible light irradiation,the open circuit potential of 304 stainless steel shifted from -190 mV(SCE)to -500 mV(SCE),after turning off the light,the electrode potential slowly increased to about -220 mV(SCE),and it showed a protective effect on stainless steel in dark environment.In the visible range,the cathodic protection performance of CdSe-TiO2 composite material was significantly improved compared with pure TiO2.
中图分类号 TG174 O6466
所属栏目 阴极保护
基金项目 国家科技支撑计划(2012BAB15B01);国际科技合作项目(2010DFR50860)
收稿日期 2014/5/24
修改稿日期
网络出版日期
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备注王秀通(1977-),副研究员,博士,从事金属腐蚀与防护的研究.
引用该论文: ZHANG Liang,WANG Xiu-tong,LI Hong,SUN Hao-fen,ZHUANG Nan,HOU Bao-rong. Photogenerated Cathodic Protection Properties of CdSe-TiO2 Composite Material on 304 Stainless Steel[J]. Corrosion & Protection, 2015, 36(3): 258
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【5】YUAN J G,SHIGEO T.Characterization of sol-gel-derived TiO2 coatings and their photoeffects on copper substrates[J].Journal of the Electrochemical Society,1995,142(10):3444-3450.
【6】YUAN J G,SHIGEO T.Photopotentials of copper coated with TiO2 by sol-gel method[J].Corrosion Engineering,1994,43(8):433-440.
【7】SHEN G X,CHEN Y C,LIN C J.Corrosion protection of 316L stainless steel by a TiO2 nanoparticle coating prepared by sol-gel method[J].Thin Solid Films,2005,489(1/2):130-136.
【8】YOSHIHISA O,SHUICHI S,TETSU T,et al.Photoelectrochemical anticorrosion and self-cleaning effects of a TiO2 coating for type 304 stainless steel[J].Journal of the Electrochemical Society,2001,148(1):B24-B28.
【9】LI Y,BAI X D,LING Y H,et al.Fabrication of titania nanotubes as cathode protection for stainless steel[J].Electrochemical and Solid-State Letters,2006,9(5):B28-B31.
【10】FUJISAWA R,TSUJIKAWA S.Photo-protection of 304 stainless steel with TiO2 coating[J].Journal of Sol-Gel Science,1994(2):529-534.
【11】LEI C X,FENG Z D,ZHOU H.Effect of liquid-phase-deposited parameters on the photogenerated cathodic protection properties of TiO2 films[J].Journal of Alloys and Compounds,2012,542:164-169.
【12】李静,云虹,林昌健.铁掺杂TiO2纳米管阵列对不锈钢的光生阴极保护[J].物理化学学报,2007,23(12):1886-1892.
【13】林成钢,林泽泉,李静等.钴离子(Co2+)掺杂TiO2纳米管阵列的光生阴极保护行为[J].电化学,2011,17(3):312-317.
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【16】云虹,林昌健,李静.N,S和Cl改性纳米TiO2薄膜的光电性能[J].电化学,2010,16(4):411-415.
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【23】沈广霞,陈艺聪,李静,等.纳米TiO2-SnO2复合薄膜的光生阴极保护作用及机理研究[J].中国腐蚀与防护学报,2006,26(2):109-114.
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