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以十二烷基硫酸钠(SDS)为乳化剂和掺杂剂,采用化学氧化聚合法合成了一种稳定的聚苯胺(PANI)乳液,该乳液与合成的磷化含氟丙烯酸酯(P-FAc)乳液以不同的比例制备复合乳胶涂层。采用傅里叶变换红外光谱仪对合成的PANI和P-FAc进行了结构表征;通过接触角、附着力、极化曲线、开路电位和电化学阻抗谱测试了复合涂层对Q235钢的防腐蚀性能;通过扫描电子显微镜观察了揭掉PANI/P-FAc复合涂层后的Q235钢表面形貌。结果表明:当PANI乳液与P-FAc乳液的质量比为1∶1时,复合涂层的性能最佳,其腐蚀电流密度仅为1.09×10~(-6)A/cm~2,平衡电位为-0.55 V,阻抗为10~(4.3)Ω·cm~2。
A stable polyaniline (PANI) emulsion was synthesized by chemical oxidative polymerization using sodium dodecyl sulfate (SDS) as emulsifier and dopant. The emulsion was mixed with the synthesized phosphonium fluoride acrylate (P- FAc) Emulsion Prepare a composite latex coating in different proportions. The synthesized PANI and P-FAc were characterized by Fourier transform infrared spectroscopy. The corrosion resistance of the composite coating to Q235 steel was tested by the contact angle, adhesion, polarization curve, open circuit potential and electrochemical impedance spectroscopy The surface morphology of Q235 steel after PANI / P-FAc composite coating was removed was observed by scanning electron microscope. The results show that the composite coating has the best corrosion performance when the mass ratio of PANI to P-FAc is 1: 1, and the corrosion current density is only 1.09 × 10 -6 A / cm 2. The equilibrium potential -0.55 V, the impedance is 10 ~ (4.3) Ω · cm ~ 2.