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以自制酞菁铜二磺酸(CuPc-(SO_3H)_2)为原料,采用“掺杂-脱掺杂-再掺杂”方法对本征态聚苯胺(EBPANI)进行导电改性。IR和UV-Vis分析表明,CuPc-(SO_3H)_2成功地对EBPANI进行了掺杂改性。四探针仪测试改性后的聚苯胺电导率为1.95 S/cm。通过电化学、耐酸性和中性盐雾实验等方法检测聚苯胺涂层的耐蚀性能,结果表明,CuPc-(SO_3H)_2能有效地掺杂EBPANI,在5%(质量分数)HCl溶液中浸泡15 d和中性盐雾实验12.5 d,CuPANI涂层只出现少量气泡和8%的白霜,在3.5%NaCl溶液中CuPANI涂层使Fe的腐蚀电位从-0.849 V正移至-0.646 V,说明CuPANI涂层对钢基片具有良好的防腐蚀性。
The intrinsic state polyaniline (EBPANI) was modified by the method of “doping - dedoping - doping” using CuPc- (SO_3H) _2 as raw material. IR and UV-Vis analysis showed that CuPc- (SO_3H) _2 successfully modified EBPANI. Four probe probe modified polyaniline conductivity of 1.95 S / cm. The corrosion resistance of polyaniline coatings was tested by electrochemical, acid-fastness and neutral salt spray experiments. The results show that CuPc- (SO_3H) _2 can effectively doping EBPANI in 5% (mass fraction) HCl solution After immersing for 15 d and neutral salt spray for 12.5 d, CuPANI coating showed only a few bubbles and 8% hoar frost. CuPANI coating in 3.5% NaCl solution shifted the corrosion potential of Fe from -0.849 V to -0.646 V , Indicating that CuPANI coating has good corrosion resistance to the steel substrate.