富镍导电涂层在模拟海水中的耐蚀性能研究

发布时间：2018-05-15 12:53

本文选题：导电涂料 + 镍粉　；参考：《中国腐蚀与防护学报》2017年02期

【摘要】：在高黏度的丙烯酸树脂中加入镍粉、消泡剂及其它助剂制备出具有导电功能的防腐涂料并涂覆在作为船舶材料的20#碳钢上。通过测试涂层的表面接触电阻来表征涂层的导电性,研究发现镍粉含量越高,涂层的导电性越好。用电化学阻抗谱研究了不同镍粉含量的导电涂层在模拟海水中的耐蚀性,并用扫描电镜(SEM)观察了浸泡90 d后涂层的表面形貌。结果表明,随浸泡时间的延长,镍粉的含量越高,涂层的容抗弧、阻抗、相位角、|Z|0.05越小;且下降的越快;从Tafel极化曲线可知,镍粉含量越高,涂层的腐蚀电流越大;从涂层表面的SEM像可知,镍粉含量越高,涂层表面腐蚀越严重。在所研究的体系中,镍粉的含量约在20%(质量分数)时,具有较好的导电性能和耐蚀性能。
[Abstract]:A conductive anticorrosive coating was prepared by adding nickel powder, defoaming agent and other additives into high viscosity acrylic resin and coated on 20 # carbon steel as ship material. The surface contact resistance of the coating was tested to characterize the conductivity of the coating. It was found that the higher the content of nickel powder, the better the conductivity of the coating. The corrosion resistance of conductive coatings with different nickel content in simulated seawater was studied by electrochemical impedance spectroscopy (EIS). The surface morphology of the coatings after immersion for 90 days was observed by scanning electron microscopy (SEM). The results show that the higher the content of nickel powder is, the smaller the arc resistance, impedance, phase angle, Z0.05 of the coating are, and the faster the decrease is, the higher the content of nickel powder is, the higher the corrosion current of the coating is, the more the content of nickel powder is, the higher the corrosion current of the coating is. From the SEM images of the coating surface, the higher the nickel powder content, the more serious the corrosion on the coating surface. In the studied system, the nickel powder has good conductivity and corrosion resistance when the content of nickel powder is about 20% (mass fraction).
【作者单位】：国网安徽省电力公司电力科学研究院;上海电力学院上海市电力材料防护与新材料重点实验室;中国大唐集团科学技术研究院有限公司西北分公司;
【基金】：上海市科委项目(14DZ2261000) 国家电网公司科技项目(5226SX13044J)~~
【分类号】：TG174.4

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