郭大伟,袁训华,顾宝珊,张庭君,杜成,江社明,张启富

• 1:钢铁研究总院先进金属材料涂镀国家工程实验室
• 2:新冶高科技集团有限公司

摘要(Abstract)：

通过在热镀锌合金化(GA)钢板上施加10%、20%、30%的单向拉伸应变量,得到了变形量不同的合金化镀层。用动电位极化法和电化学阻抗图谱法测得了不同变形量的合金化镀层在3.5%NaCl溶液中的腐蚀行为,用SEM观察了变形量不同的合金化镀层腐蚀前后的表面形貌。结果表明,合金化镀层的电化学阻抗随拉伸变形量的增大而变小,在拉伸的初始阶段阻抗值下降尤为明显,腐蚀电流是先减小后增大,说明GA镀层的变形量为10%时,镀层电容具有较高的保持电荷的能力。变形后的试样优先在裂纹内部发生点蚀,腐蚀深度和面积随形变量的增加而增大。当变形量达到30%时,镀层表面的裂纹已经增大到不具备优先发生腐蚀的尺寸。

关键词(KeyWords)： 单向拉伸;极化曲线;阻抗谱;表面形貌;GA镀层

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51071052);; 国家“十二五”科技支撑项目(2012BAJ13B03);; 北京市科技计划项目(D07010300700702)

作者(Author): 郭大伟,袁训华,顾宝珊,张庭君,杜成,江社明,张启富

DOI: 10.13289/j.issn.1009-6264.2013.08.021

参考文献(References)：

• [1]袁训华,刘昕,陈斌锴,等.合金化镀层拉伸过程中裂纹产生及扩展的原位观察[J].金属热处理,2010,35(10):11-15.YUAN Xun-hua,LIU Xin,CHEN Bin-kai,et al.In-situ observation for generation and propagation of crack in galvannealed coating during tensileprocess[J].Heat Treatment of Metals,2010,35(10):11-15.
• [2]Lee Kyung-Keun,Lee In-Hwan,Lee Cheul-Ro,et al.In-situ observation in a scanning electron microscope on the exfoliation behavior of galvannealedZn-Fe coating layers[J].Surface and Coatings Technology,2007,201(14):6261-6266.
• [3]Takayuki Takasugi,Junichi Machida.Plastic deformation and fracture behavior of galvannealed coating under compressive stress circumstance[C]//The 7th International Conference on Zinc and Zinc Alloy Coated Steel Sheet,Osaka,Japan,2007:230-235.
• [4]袁训华,张启富,江社明.热镀锌合金化工艺对镀层表面摩擦特性的影响[J].材料热处理学报,2011,32(6):132-137.YUAN Xun-hua,ZHANG Qi-fu,JIANG She-ming.Effect of galvannealing parameters on friction characteristics of galvannealed coatings[J].Transactions of Materials and Heat Treatment,2011,32(6):132-137.
• [5]Luis G Garza,Chester J Van Tyne.The effect ofζ-phase on the frictional Behavior of galvannealed interstitial free sheet steels[C]//The 7thInternational Conference on Zinc and Zinc Alloy Coated Steel Sheet,Osaka,Japan,2007:248-253.
• [6]姜莉莉,李谋成,张文麒,等.纳米晶镀锌层在3.5%NaCl溶液中的腐蚀电化学行为[J].中国腐蚀与防护学报,2008,28(5):303-306.JIANG Li-li,LI Mou-cheng,ZHANG Wen-qi,et al.Electrochemical corrosion behavior of nanocrystalline zinc coatings in 3.5%NaCl solution[J].Journal of Chinese Society for Corrosion and Protection,2008,28(5):303-306.
• [7]曹楚南.腐蚀电化学原理(第3版)[M].北京:化学工业出版社,2008.
• [8]Barranco V,Feliu Jr S,Feliu S.EIS study of the corrosion behavior of zinc-based coatings on steel in quiescent 3%NaCl solution.Part1:directlyexposed coatings[J].Corrosion Science,2004,46(9):2203-2220.
• [9]Sacco E A,Alvarez N B,Culcasi J D,et al.Effect of the plastic deformation on the electrochemical behavior of metal coated steel sheets[J].Surfaceand Coatings Technology,2003,168(2-3):115-122.
• [10]王佳,曹楚南,林海潮,等.孔蚀发展期的电极阻抗频谱特征[J].中国腐蚀与防护学报,1989,9(4):271-278.WANG Jia,CAO Chu-nan,LIN Hai-chao,et al.Features of AC impedance of pitting corroded electrodes during pits propagation[J].Journal ofChinese Society for Corrosion and Protection,1989,9(4):271-278.

文章评论(Comment)：