电沉积制备Fe3O4涂层的工艺研究
Study on Preparation Process of Fe3O4 Coating Prepared by Electrodeposition
DOI: 10.12677/MS.2020.1011112, PDF,    科研立项经费支持
作者: 郑明珉, 刘艳红*, 王晓婧：国家电投集团科学技术研究院有限公司，北京；张安磊, 王 鹰, 张迎春：北京科技大学，北京
关键词: Fe3O4涂层；电沉积；电化学腐蚀；流动加速腐蚀；Fe3O4 Coating； Electrodeposition； Electrochemical Corrosion； Flow Accelerated Corrosion
摘要: 核电厂二回路管道是处于一个水流或水汽两相流通的环境中，常发生的流动加速腐蚀(flow accelerated corrosion, FAC)现象会使管壁变薄，严重时管道破裂。因此，保护二回路管道防止FAC现象的发生，对于核电站经济效益的提升和电站的稳定运行具有重要意义。本项目研究了在二回路管道碳钢基底上电镀Fe3O4涂层的工艺参数对镀层性能的影响；在1~3 mA/cm2电沉积电流密度条件下制备了Fe3O4涂层，结果发现，当电流密度为2 mA/cm2时涂层最厚；腐蚀电流密度Jcorr随着电流密度增加而减小；模拟FAC腐蚀测试分析表明，当电流密度为1.5 mA/cm2，电镀温度为80℃，电镀时间为5 min时，而且镀液不搅拌的条件下制备的涂层失重率最低。通过微观形貌分析，涂层具备良好的完整性和均匀性，因而该条件下制备的涂层有更好的耐水腐蚀性能。
Abstract: The secondary loop piping of nuclear power plant is in an environment of water or water vapor two-phase. The resulting of the flow accelerated corrosion (FAC) phenomenon which often occurs makes the pipe wall thinner, and the pipeline ruptures in severe cases. Therefore, the protection of the secondary loop piping and preventing the occurrence of the FAC phenomenon are of great significance to the economic benefit and the stable operation of the power plant. This project studied the effect of the process parameters of electroplating Fe3O4 coating on the carbon steel substrate of the secondary loop piping on the performance of the coating; the Fe3O4 coating was prepared under the electrodeposition current density of 1 - 3mA/cm2, and it was found that the coating was thickest at 2 mA/cm2; the corrosion current density Jcorr decreased with the increase of current density. The simulated FAC corrosion test analysis shows the weight loss rate of the coating prepared with no stirring of the plating solution is the lowest, when the current density is 1.5 mA/cm2, the electroplating temperature is 80℃, and the electroplating time is 5 min. Through microscopic morphology analysis, the coating has good integrity and uniformity, so the coating prepared under this condition has better water corrosion resistance.
文章引用：郑明珉, 刘艳红, 张安磊, 王鹰, 张迎春, 王晓婧. 电沉积制备Fe3O4涂层的工艺研究[J]. 材料科学, 2020, 10(11): 927-941. https://doi.org/10.12677/MS.2020.1011112

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