真空蒸发制备带钢锌镁合金镀层的防腐蚀机制
Anti-corrosion Mechanism of Zn-Mg Alloy Coating on Steel Prepared by Vacuum Evaporation
摘 要
采用真空热蒸发在镀锌钢板表面镀镁, 并由快速退火形成锌镁合金镀层。采用电化学试验研究镀锌镁合金钢板的腐蚀过程, 并推断其防腐蚀机理。结果表明, 在腐蚀初期, 锌镁合金表面形成一层致密层, 该层成分主要为致密且抗腐蚀性强的氢氧化镁、氢氧化锌和氧化镁。当致密层溶解后, 依靠锌层作为阳极对钢铁进行保护。
防腐蚀
快速退火
电化学
真空蒸发
Zn-Mg alloy
anti-corrosion
fast annealing
electrochemistry
vacuum evaporation
Abstract
Vacuum evaporation and short-term thermal treatment were used to prepare Mg layer on galvanized steel. Using electrochemical analysis, the corrosion process was studied and the anti-corrosion mechanism was also discussed. The results show that a dense layer forms on the top of zinc layer at the first stage of corrosion. The dense layer consists of magnesium hydroxide, zinc hydroxide and magnesium oxide, and is compact, insoluble and consequently well corrosion resistant. After the dense layer decomposes, the zinc layer as an anode protects steel.
中图分类号 TG178
所属栏目 试验研究
基金项目 国家自然科学基金(50871129)
收稿日期 2012/8/29
修改稿日期
网络出版日期
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备注沈杰,副教授,
引用该论文: MAO Xin-guang,MA Jin,SHEN Jie. Anti-corrosion Mechanism of Zn-Mg Alloy Coating on Steel Prepared by Vacuum Evaporation[J]. Corrosion & Protection, 2013, 34(7): 557
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参考文献
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【3】Short N R,Zhou S,Dennis J K. Electrochemical studies on the corrosion of a range of zinc alloy coated steel in alkaline solutions[J]. Surface and Coatings Technology,1998,79(123):218-224.
【4】Nishimura K,Shindo H,Nomura H,et al. Corrosion resistance of hot dip Zn-Mg Galvanized steel sheet[J]. Tetsu to Hagane,2003,89(1):174-179.
【5】Schuhmacher B,Schwerdt C,Seyfert U,et al. Innovative steel strip coatings by means of PVD in a continuous pilot line:process technology and coating development[J]. Surface and Coatings Technology,2003,84(163/164):703-709.
【6】Schwerdt C,Riemer M,Koehler S,et al. Application related properties of novel Zn-Mg coated steel sheet[J]. Stahl and Eisen,2004,124(9):69-74.
【7】福居康,松野雅典,田中宏,等. 高耐腐蚀性Zn-Mg系电镀钢板及其制造方法:中国,1135537A[P].1996.
【8】Nakano H,Oue S,Kobayashi S,et al. Mg-contained Zn electroplating from aqueous solution containing quaternary ammonium salt[J]. Tetsu to Hagane,2004,90(10):801-806.
【9】Morishita M,Koyama K,Mori Y. Inhibition of anodic dissolution of zinc-plated steel by electrodeposition of magnesium from a molten salt[J]. ISIJ International,1997,37(1):55-58.
【10】杨立红,方园,卢金雄. 钢铁工业表面产品与技术面临的挑战与对策[J]. 钢铁,2008,43(8):1-6.
【11】Proseka T,Nazarova A,Bexellb U,et al. Corrosion mechanism of model zinc-magnesium alloys in atmospheric conditions[J]. Corrosion Science,2008,50(8):2216-2231.
【12】Hausbrand R,Stratmann M,Rohwerder M. Corrosion of zinc-magnesium coatings:Mechanism of paint delamination[J]. Corrosion Science,2009,51(17):2107-2114.
【13】Udhayan R,Bhatt D P. On the corrosion behaviour of magnesium and its alloys using electrochemical techniques[J]. Journal of Power Sources,1996,63(1):103-107.
【14】颜飞,杨立红,陈圣,等. 真空镀锌镁合金镀层微观结构表征[J]. 宝钢技术,2010,28(5): 42-46.
【15】马进,贾晓明,沈杰. 钢板锌镁镀层制备及退火工艺对锌镁合金化的影响[J]. 真空科学与技术学报,2012,32(4):332-336.
【16】Makar G L,Kruger J. Corrosion of magnesium[J]. International Materials Reviews,1993,38(3):138-153.
【17】Fournier V,Marcus P,Olefjord I. Oxidation of magnesium[J]. Surface and Interface Analysis,2002,34(1):494-497.
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