三种导电防腐涂层的耐蚀性能研究

Investigations on Corrosion Resistance of Three Conductive Anticorrosive Coatings

分别制备聚苯胺改性石墨烯、纳米粒子改性石墨烯和石墨/炭黑复合物三种导电防腐涂料,并将其分别涂覆在Q235钢表面制备导电防腐涂层接地材料。采用接触角仪、电化学阻抗谱、Tafel极化曲线和光学显微镜,研究了该上述涂层在酸性土壤模拟液中的腐蚀性能。结果表明:三种导电防腐涂层均具有优良的防腐性能和较大的接触角。纳米粒子改性石墨烯涂层和聚苯胺改性石墨烯涂层防腐效果大于石墨/炭黑复合导电涂层。纳米粒子改性石墨烯涂层和聚苯胺改性石墨烯涂层的保护效率分别高达92.09%和91.44%。

Three kinds of conductive anticorrosive coatings such as polyaniline modified graphene, nanoparticlemodified graphene and graphite/carbon black composites were prepared. Then, they were coated on Q235 steel to prepare conductive anticorrosive grounding materials. The corrosion performances of the above coatings in acidic soil simulated solution were studied by using contact angle meter, electrochemical impedance spectroscopy, tafel polarization curve and optical microscopy techniques. The results show that the three kinds of conductive anti-corrosion coatings have excellent anti-corrosion properties and large contact angles. The anti-corrosion effects of the nanoparticles modified graphene coating and polyaniline modified graphene coating are greater than that of graphite/carbon black composite conductive coating. The protection efficiency of nanoparticle-modified graphene coating and polyaniline-modified graphene coating is as high as 92.09% and 91.44%, respectively.