This work reports on the use of the sodium hexametaphosphate (SHMP) surfactant for the dispersion of ZnO nanoparticles in the PPy polymer matrix for the production of the composite PPy-ZnO as an anticorrosive coating on mild steel. The coatings of PPy, PPy-ZnO and PPy-ZnO-SHMP were electrodeposited by cyclic voltammetry (CV) method. The anticorrosion behavior of all the coatings was studied in a 3.5% NaCl solution medium at room temperature. The performance of all the coatings was evaluated using polarization measurements, electrochemical impedance spectroscopy (EIS) and chronopotentiometry at open circuit potential (OCP). It was found that the presence of SHMP during synthesis resulted in a more homogeneous and compact coating in which the ZnO nanoparticles were more evenly distributed among the PPy particles. Furthermore the coating PPy-ZnO-SHMP exhibited higher corrosion resistance and provided better barrier properties compared to pure PPy and PPy-ZnO coatings.

这项工作报道了使用六偏磷酸钠（SHMP）表面活性剂将ZnO纳米颗粒分散在PPy聚合物基质中，以生产复合PPy-ZnO作为低碳钢上的防腐涂层。通过循环伏安法（CV）对PPy，PPy-ZnO和PPy-ZnO-SHMP涂层进行电沉积。在室温下，在3.5％NaCl溶液介质中研究了所有涂层的防腐性能。使用极化测量，电化学阻抗谱（EIS）和计时电位在开路电势（OCP）下评估所有涂层的性能。发现在合成期间SHMP的存在导致更均匀和致密的涂层，其中ZnO纳米颗粒更均匀地分布在PPy颗粒之间。