热浸镀锌液中的铝含量对镀层合金化后的耐蚀性有重要影响.用电化学和循环腐蚀试验方法研究了锌液中不同Al含量热镀锌层合金化后的耐蚀性能.结果表明:当锌液中Al含量为0.13％时,镀层具有较高的耐蚀性;随着锌液中Al含量的增加,镀层的阻抗值下降,腐蚀增重量上升,耐蚀性恶化;镀层/钢基体界面处Fe-Al化合物量逐渐上升,镀层中总的Fe含量降低,镀层表面出现红斑的面积逐渐下降;当镀层中含有一定量的Fe元素时,不应以镀层表面出现红斑的时间或面积来评价镀层的耐蚀性能.
参考文献
| [1] | Yoshinari NUNOMURA;Takayuki TAKASUGI .Plastic Deformation and Fracture Behavior of Galvannealed Coating[J].ISIJ International,2003(3):454-460. |
| [2] | Besseyrias A;Dalard F;Rameau J J et al.A study of galvanic corrosion during coulometric dissolution of galvannealed steel[J].Corrosion Science,1995,37(04):587-595. |
| [3] | Besseyrias A;Dalard F;Rameau J J et al.Electrochemical behavior of zinc-iron intermetallic compounds in an aqueous solution containing NaCl and ZnSO4[J].Corrosion Science,1997,39(10-11):1883-1896. |
| [4] | 袁训华,刘昕,陈斌锴,江社明,张启富.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(10):11-15. |
| [5] | E.MCDEVITT .Characterization of the Fe-Al Interfacial Layer in a Commercial Hot-dip Galvanized Coating[J].ISIJ International,1997(8):776-782. |
| [6] | Marder AR. .The metallurgy of zinc-coated steel [Review][J].Progress in materials science,2000(3):191-271. |
| [7] | Queiroz FM;Costa I .Electrochemical, chemical and morphological characterization of galvannealed steel coating[J].Surface & Coatings Technology,2007(16/17):7024-7035. |
| [8] | Bandyopadhyay N;Jha G;Singh AK;Rout TK;Rani N .Corrosion behaviour of galvannealed steel sheet[J].Surface & Coatings Technology,2006(14/15):4312-4319. |
| [9] | 曹楚南.腐蚀电化学原理(第3版)[M].北京:化学工业出版社,2008:127-128. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%