掺杂态和本征态聚苯胺对不锈钢的保护作用
Protection Performance of Doped and Eigenstate Polyaniline on Stainless Steel
摘 要
用电化学方法在不锈钢表面制备了磷酸掺杂的聚苯胺,将掺杂态聚苯胺浸在1 mol/L氨水中脱掺杂得到本征态聚苯胺.用扫描电子显微镜和红外光谱对掺杂态和本征态聚苯胺进行了表征,采用动电位极化曲线和电位-时间曲线研究了它们对不锈钢在1 mol/L硫酸钠溶液中的保护性能.结果表明,掺杂态和本征态聚苯胺表面都有孔,使不锈钢的自腐蚀电位显著正移:本征态聚苯胺起机械隔离作用,掺杂态聚苯胺主要使不锈钢钝化:掺杂态聚苯胺对不锈钢的保护时间比本征态的长很多.
不锈钢
掺杂态
本征态
腐蚀防护
polyaniline
stainless steel
doped state
eigenstate
anti-corrosion
Abstract
Polyaniline (Pani) doped with phosphoric acid was synthesized on stainless steel by electrochemical method and the eigenstate Pani was prepared by immersing the doped Pani in 1 mol/L NH4OH for 4h.The doped pani and eigenstate Pani were characterized by scanning electron microscopy and fourier transform infrared spectroscopy.Their protection performance on stainless steel in 1 mol/L Na2SO4 solution was investigated through potentiodynamic polarization and potential-time curves.Results indicated that there were holes on both surfaces of the doped and eigenstate Pani.The corrosion potential of both kinds of Pani positively shifted remarkedly.The eigenstate Pani protects stainless steel by mechanical isolation.The doped Pani protects stainless steel by passivation,and its protection time is longer than that of the eigenstate Pani.
中图分类号 TG174.46
所属栏目 试验研究
基金项目
收稿日期 2010/1/28
修改稿日期 2010/2/27
网络出版日期
作者单位点击查看
备注李国希,教授.
引用该论文: JIANG Jin-wu,LI Guo-xi,GAO Gui-hong,ZENG Hua-bo,MEI Xi-yan. Protection Performance of Doped and Eigenstate Polyaniline on Stainless Steel[J]. Corrosion & Protection, 2010, 31(12): 936～938
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参考文献
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【3】Sathiyanarayanan S,Muthkrishnan S,Venkatachari G.Corrosion protection of steel by polyaniline blended coating[J].Electrochimica Acta,2006,51(28):6313-6319.
【4】郭良生,黄霓裳,余兴增.钼酸钠-磷酸盐对碳钢的协同缓蚀作用机理[J].材料保护,2000,33(2):39-41.
【5】Guo Y P,Zhou Y.Polyaniline nanofibers fabricated by electrochemical polymerization:A mechanistic study[J].European Polymer Journal,2007,43(6):2292-2297.
【6】MacDiarmid A G,Chiang J C,Richter A F,et al.Polyaniline:A new concept in conducting polymers[J].Synthetic Metals,1987,18(1/3):285-290.
【7】Blinova N V,Stejskal J,Trchoval M,et al.Polyaniline prepared in solutions of phosphoric acid:Powders,thin films,and colloidal dispersions[J].Polymer,2006,47(1):42-48.
【8】Stejskal J,Sapurina I,Trchová M,et al.Solid-state protonation and electrical conductivity of polyaniline[J].Macromolecules,1998,31(7):2218-2222.
【9】Hosseini M G,Sabourib M,Shahrabi T.Corrosion protection of mild steel by polypyrrole phosphate composite coating[J].Progress in Organic Coatings,2007,60(3):178-185.
【10】王建雄,郭清萍,郭有军.一种新型聚苯胺涂层的防腐蚀性能[J].腐蚀与防护,2009,30(2):119-121.
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