表面技术2018，Vol.47Issue(2)：182-188,7.DOI:10.16490/j.cnki.issn.1001-3660.2018.02.029
新型电弧喷涂用Zn-Cu-Ti线材及其金属涂层性能研究
Properties of Zn-Cu-Ti Wires and Their Metal Coating for New Arc Spraying
倪雅 1吴国光 2闫远方 1周春侠2
作者信息
- 1. 中国矿业大学化工学院,江苏徐州221000
- 2. 江苏中矿大正表面工程技术有限公司,江苏徐州221000
- 折叠
摘要
Abstract
The work aims to develop an electric arc spraying alloy wire of steel structure requiring no maintenance or less maintenance during service period.Optimum formula of the new Zn-Cu-Ti alloy wire was determined based upon binary phase diagram and exploratory experiment.Corrosion resistance of the coating was studied by performing salt spray test and electrochemical experiment.Surface morphology of the original and corroded metallic coating was observed with SEM.Chemical composition of the coating surfaces under different corrosion conditions was characterized with XRD.The coating surfaces were completely passivated after immersion in 3.5％NaCl corrosion solution for 10 days,and effects of corrosion solution on the coatings tended to be stable.Corrosion rate began to decrease as salt spray test lasted 1080 h,and reduced to the lowest rate,0.044 g/(m2·h) at 2160 h.Due to negative corrosion potential of the new Zn-Cu-Ti coating,a passive film might take shape and protect the substrate as a result of oxidizing reaction in a short time.The XRD spectra of the corroded coating showed that Zn oxides were present at 2θ=36.4°,39.1° and 54.1°.Main oxides included Zn(OH)2 and Zn(OH)8Cl2·H2O,and peak intensity of each element gradually decreased as corrosion time prolonged.The metallic coating made from new Zn-Cu-Ti alloy wire exhibits excellent corrosion resistance.关键词
Zn-Cu-Ti/合金线材/金属涂层/防腐/电化学/表征Key words
Zn-Cu-Ti/alloy wire/metallic coating/anti-corrosion/electrochemistry/characterization分类
矿业与冶金引用本文复制引用
倪雅,吴国光,闫远方,周春侠..新型电弧喷涂用Zn-Cu-Ti线材及其金属涂层性能研究[J].表面技术,2018,47(2):182-188,7.
