几种合金涂层在变电站土壤中的腐蚀行为研究  

Investigation of Corrosion Behaviors of Different Alloy Coatings in the Soil of Transformer Substation

作　　者：徐松[1] 冯兵[1] 何铁祥[1] 胡波涛[1] 吴欣强[2] 

机构地区：[1]国网湖南省电力公司电力科学研究院,长沙410007 [2]中国科学院金属研究所,沈阳110016

出　　处：《装备环境工程》2015年第4期54-59,共6页Equipment Environmental Engineering

基　　金：国家电网公司科技项目(KG12K16004)~~

摘　　要：目的研究Al,Al Si,Ni Al,316L不锈钢四种合金涂层在变电站土壤及其溶液中的腐蚀行为。方法采用高速电弧喷涂方法在Q235钢表面上分别制备纯Al,Al Si,Ni Al,316L不锈钢合金涂层,通过对四种涂层钢在湖南220 k V毛家塘变电站中进行埋样和土壤溶液里的电化学实验,研究四种涂层在变电站土壤及其溶液中的耐蚀性能,并利用扫描电子显微镜(SEM)和X射线电子能谱(EDS)对埋样的腐蚀产物进行观察和分析。结果 Al Si涂层具有最好的耐土壤腐蚀性,其次是Ni Al涂层和316L不锈钢涂层,而纯铝涂层长时间埋地容易鼓泡,耐土壤腐蚀性不佳。结论四种合金涂层显著提高了Q235钢的耐蚀性,可用于接地网材料防腐。Objective To investigate the corrosion behaviors of four alloy coatings （A1, A1Si, NiA1, 316L） samples in the soil and soil solution of transformer substation. Methods Pure A1 coating, A1Si alloy coating, NiA1 alloy coating and 316L stainless steel coating were prepared on the surface of Q235 steel by high-speed arc spraying technology. The corrosion resistance of the four sprayed alloy coatings in the soil and soil solution of the Maojiatang 220kV transformer substation in Hunan was studied by buried specimens and electrochemical test. The corrosion products of the buried specimens were observed and analyzed by scanning electron microscopy （SEM）and electron diffraction spectra （EDS）. Results The results showed that A1Si coating had the best corrosion resistance among the four sprayed alloy coatings, followed by NiA1 and stainless steel coating, and the A1 coating was easily bouffant after buried for a long time in the underground, so that the corrosion resistance was not good. significantly improved by the four sprayed alloy coatings, grounding grid materials Conclusion The corrosion and the coated steel could resistance of steel Q235 was be applied in protection of

关 键 词：合金涂层 土壤腐蚀 电化学腐蚀 高速电弧喷涂 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术] TG172.3[金属学及工艺—金属表面处理]