电化学法合成壳聚糖-聚苯胺复合涂层的耐蚀性  

Anticorrosion Properties of Chitosan-Polyaniline Composite Coatings via Electrochemical Synthesis

作　　者：郭安琪 云虹 彭莉 凌静威 蒋芳芳 沈喜训 徐群杰 GUO Anqi;YUN Hong;PENG Li;LING Jingwei;JIANG Fangfang;SHEN Xixun;XU Qunjie(Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai Engineering Research Center of Energy Saving in Heat Exchange Systems,College of Environmental and Chemical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Technical Center for Mechanical and Electrical Product Inspection and Testing of Shanghai Customs,Shanghai 200135,China)

机构地区：[1]上海电力大学环境与化学工程学院上海热交换系统节能工程技术研究中心上海市电力材料防护与新材料重点实验室,上海200090 [2]上海海关机电产品检测技术中心,上海200135

出　　处：《腐蚀与防护》2022年第8期8-13,20,共7页Corrosion & Protection

基　　金：国家自然科学基金(21673135);上海科委项目(17020500700,19DZ2271100,18511110902)。

摘　　要：采用电化学法在304不锈钢表面制备壳聚糖(CTs)-聚苯胺(PANI)复合涂层,利用扫描电镜(SEM),红外光谱仪(FTIR)和X射线衍射仪(XRD)表征CTs-PANI复合涂层的表面形貌,化学组成和晶型。通过极化曲线和电化学阻抗谱研究了CTs-PANI复合涂层的耐蚀性。结果表明:10%CTs-PANI复合涂层在3.5%(质量分数)NaCl溶液中的耐蚀性最佳,在3.5%NaCl溶液中浸泡168h后,相比于304不锈钢,其腐蚀电流密度下降了2个数量级,腐蚀电位正移近500mV。该复合涂层对基体材料具有优良的保护作用。Chitosan(CTs)-polyaniline(PANI)composite coatings were prepared on the surface of 304stainless steel by electrochemical synthesis.The surface morphology,chemical composition and crystal structure of the composite coatings were characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD).The anticorrosion properties of CTs-PANI composite coatings were investigated by polarization curves and electrochemical impedance spectra.The results show that the 10%CTs-PANI composite coating had the best corrosion resistance in 3.5%(mass fraction)NaCl solution.After 168himmersion in 3.5%NaCl solution,the corrosion current density of the 10%CTS-PANI composite coating reduced by about 2orders of magnitude compared with 304stainless steel,and the corrosion potential positively shifted close to 500 mV.The composite coatings had an excellent protective effect on substrate materials.

关 键 词：电化学法合成 聚苯胺 壳聚糖 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]