| 摘要: |
| 热喷涂金属涂层是当前海洋环境下钢结构件防腐的首选方法，利用电弧喷涂技术在新型海洋工程结构用钢（Q345B钢）表面制备了Zn-55%Al伪合金热喷涂涂层，并与纯Zn涂层和纯Al涂层的耐蚀性进行了对比。结果表明：纯Zn涂层能提供较好的电化学阴极保护作用，但电化学性能欠佳；纯Al涂层表现出优良的电化学性能，但腐蚀后期产生点蚀；Zn-55%Al伪合金涂层具有更优越的耐蚀性和腐蚀防护性能。 |
| 关键词: 电弧喷涂涂层 极化测试 电化学阻抗频谱 耐蚀性 |
| DOI： |
| 分类号: |
| 基金项目:常州市工业科技成果转化及产业化计划项目(CC20100004) |
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| Corrosion Behavior of Zn-55%Al Coating Sprayed on Marine Steel Compared with Pure Zn and Pure Al Coatings |
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ZHANG Wu-wen, MA Ai-bin, JIANG Jing-hua, LU Fu-min, SONG Dan
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a. College of Mechanics and Materials b. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing 210098
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| Abstract: |
| Thermal spray metal coating is the preferred method for protecting steel structures in marine environment. In this work, the Zn-55%Al pseudoalloy coating was sprayed by arc spraying technology on a new marine structural steel (Q345B), and corrosion behaviour of the coating was investigated and compared with that of the pure Zn and pure Al coatings. The results show that, the pure Zn coating could provide electrochemical cathodic protection but poor electrochemical performance; the pure Al coating exhibited excellent electrochemical performance but showed pitting corrosion; compared to these, the Zn-55%Al pseudoalloy coating exhibited the higher corrosion resistance and a good corrosion protection. |
| Key words: electric arc spray coatings polarization tests electrochemical impedance spectrum corrosion resistance |
