富镍导电涂层在红壤溶液中的耐腐蚀性能  

Anti-Corrosive Performance of Nickel-Rich Conductive Coatings in Red Soil Solution

作　　者：张心华[1] 郑敏聪[1] 张兵 周仲康[1] 葛红花[3] 廖强强[3] 闫爱军 刘松慧[3] 吴一平[3] 

机构地区：[1]国网安徽省电力公司电力科学研究院,安徽合肥230601 [2]国网陕西省电力公司电力科学研究院,陕西西安710054 [3]上海电力学院上海市电力材料防护与新材料重点实验室,上海200090

出　　处：《材料保护》2016年第7期14-19,5,共6页Materials Protection

基　　金：上海市科委项目(14DZ2261000);国家电网公司科技项目(5226SX13044J)资助

摘　　要：目前,国内鲜见导电涂层在红壤中腐蚀行为的研究报道。在高黏度的丙烯酸树脂涂料中加入溶剂、分散剂、消泡剂、增稠剂、镍粉等,制备了防腐蚀导电涂料,并在Q235钢表面制备导电涂层。通过表面接触电阻分析镍粉含量与涂层导电性的关系。将不同镍粉含量的涂层浸泡在红壤溶液中,采用电化学阻抗谱、Tafel极化曲线和光学显微镜等方法,研究了镍粉含量对导电涂层耐腐蚀性能的影响。向红壤中加入不同浓度Fe_2(SO_4)_3,研究了Fe_2(SO_4)_3含量对导电涂层耐蚀性能的影响。结果表明:镍粉含量越高,涂层的导电性越好,耐腐蚀性越差;红壤溶液中,Fe_2(SO_4)_3的含量越高,涂层的阻抗越小,耐腐蚀性越差,Fe_2(SO_4)_3会加速腐蚀反应的进行。In this paper,the conductive anticorrosion coatings were prepared by adding solvent,dispersanl,defoamer,thickener and nickel powder into the acrylic resin coalings with high viscosity,and then conductive coaling on Q235 steel was formed.The relationship between the mass concentration of nickel powder and the electrical conductivity of the coaling was characterized by surface contact resistance.In addition,the coalings with different mass concentration of nickel powder were immersed in red soil solutions,and the influences of nickel powder on the corrosion resistance of conductive coaling were studied by electrochemical impedance spectroscopy,Tafel polarization curves and light microscopy.By adding different concentration of Fe_2(SO_4),into red soil,the influences of Fe_2(SO_4),content on the corrosion resistance of conductive coating were investigated.Results showed that wifh ihe increase of nickel powder content,the coating had better electrical conductivity and worse corrosion resistance.In red soil solution,as the Fe_2(SO_4)_3content increased,the impedance of coating became smaller,and the corrosion resistance changed worse,which indicated that Fe_2(SO_44)_3 could accelerate the corrosion reaction.

关 键 词：导电涂料 镍粉 导电性 耐蚀性 红壤 FE2(SO4)3 Q235钢 

分 类 号：TG174.4[金属学及工艺—金属表面处理]