聚苯胺聚吡咯復合薄膜的制備及其抗腐蝕性能研究

1、 242Vol.24No.2 20123CORROSION SCIENCE AND PROTECTION TECHNOLOGY Mar.2012/,730050:/./.: 3.5%NaCl,.,.,.7:3, 1.1mol/L,25,60mV/s, 1.2V,.:;:TG172,TG174:A:10026495(201202012705Preparation and Corrosion Performance of Composite Filmof PANI/PPYXU Hui,WANG Xin-ying,LIU Xiao-yuCollege of Petrochemical Technol

2、ogy,Lanzhou University of Technology,Lanzhou730050Abstract:Compositelms of PANI/PPY were prepared by cyclic voltammetry(CVmethod on stainless steel.Its corrosion performance was investigated in3.5%NaCl solution by Potentiodynar-nic polarization curves and electrochemical impedance spectroscopy(EIS.T

3、he results show that the compositelm of PANI/PPY has well corrosion resistance.The free corrosion potential of the stainless steel with PANI/PPYlm was much positive than that without and with PANIlm.The corrosion resistance of the steel with compositelm are inuenced by the concentration of aniline,

4、pyrrole,sulfuric acid of the elctrolytes and electrochemical parameters of the preparation process.The compositelm of PANI/PPY has the best corrosion resistance when the concentration ratio of aniline to pyrrole is7:3,and sulfuric acid is1.1mol/L,the scanning segment is25,the scanning rate is60mV/s,scanning voltage is1.2V.Key words:cyclic voltammetry(CV;aniline;pyrrole;copolymerization;Tafel;EIS,.,1.(PANI,2,3.,128242:/12913024Corrosion potential/V0.410.430.460.510.50Table2Corrosion potential for PANI/PPYlms,synthesized by dierent scan segments in3.5%NaClScan segm