将Q235钢分别在Zn-6%(质量分数,下同)Al和Zn-6%Al-3%Mg合金锌浴中浸镀不同的时间,使用扫描电子显微镜(SEM)、能谱分析仪(EDS)以及X射线衍射仪(XRD)对样品合金镀层显微进行观察,分析镀层层合金层的相组成及生长过程,研究Mg对合金层生长的作用.通过研究发现,在Zn-6%Al和Zn-6%Al-3%Mg合金镀层中合金界面层组成主要是Fe-Al-Zn化合物,Fe-Al-Zn合金界面层阻碍了脆性Fe-Zn层的形成.Mg加入Zn-6% Al锌池中后促进了界面反应,缩短了合金层出现所需时间,并使合金层的生长更加致密均匀,稳定合金层使其不被液相侵蚀破坏而溶解.Mg的加入阻碍了扩散通道随着时间延长逐渐向两扩散组元成分点连线移动的趋势,减少了锌液进入合金层,稳定了合金层.Zn-6%Al-3%Mg镀层合金层随着时间延长而增厚,合金层的生长呈抛物线规律,主要受扩散反应控制.
参考文献
[1] | 李智,苏旭平,贺跃辉,谭铮,尹付成.Zn/Fe及Zn/Fe-Si固态扩散偶中金属间化合物的生长[J].中国有色金属学报,2008(09):1639-1644. |
[2] | 魏世丞,朱晓飞,魏绪钧.添加铝和钛对热镀锌层的影响[J].有色金属,2003(03):23-24,45. |
[3] | 杨栋,陈建设,韩庆,刘奎仁.钢丝热镀Zn-Al-Mg合金层及其电化学腐蚀行为[J].材料保护,2008(11):1-4. |
[4] | 魏云鹤,主沉浮,于萍,郭晓玉,任君合,张长桥,孙瑛.暂态线性极化技术研究Galfan与Galvalume的耐蚀性能[J].材料工程,2003(07):17-19. |
[5] | S. Schuerz;G.H. Luckeneder;M. Fleischanderl;P. Mack;H. Gsaller;A.C. Kneissl;G. Mori .Chemistry of corrosion products on Zn-Al-Mg alloy coated steel[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2010(10):3271-3279. |
[6] | KOMATSU A;TSUJIMURA T;WATANABE K et al.Hot-dip Zn-Al-Mg coated steel sheet excellent in corrosion resistance and surface appearance and process for the production thereof[P].USA Patent:US6235410B1,1999 |
[7] | MORIMOTO Y;HONDA K;NISHIMURA K et al.Excellent corrosion-resistant Zn-Al-Mg-Si alloy hot-dip galvanized steel sheet Super Dyma[J].Nippon Steel Tech,2006,87:24-26. |
[8] | TANO K;HIGUCHI S .Development and properties of zinc-aluminum alloy coated steel sheet with high corrosion resistance(Super Zinc)[J].Nippon Steel Tech,1985,25:29-37. |
[9] | H.Shindo;K.Nishimura .Developments and Properties of Zn-Mg Galvanized Steel Sheet "DYMAZINC" Having Excellent Corrosion Resistance[J].NIPPON STEEL TECHNICAL REPORT,1999(79):63-67. |
[10] | 孔纲,刘仁彬,车淳山,卢锦堂.锌浴温度对0.49%Si活性钢热浸镀锌层组织的影响[J].材料工程,2011(01):81-86. |
[11] | DUTTA M;HALDER A K.SINGH S B Morphology and properties of hot dip Zn-Mg and Zn-Mg-Al alloy coatings on steel sheet[J]. |
[12] | SUGIMARU S;TANKA S .Zinc alloy coated steel wire with high corrosion resistance[J].NIPPON STEEL TECHNICAL REPORT,2007,96(07):34-38. |
[13] | BRUYCKER E D .Zn-Al-Mg alloy coatings:thermodynamic analysis and microstructure-related properties[D].Belgium:Gent University,2005. |
[14] | SCHUERZ S;FLEISCHANDERL M;LUCKENEDER G H .Corrosion behavior of Zn-Al-Mg coated steel sheet in sodium chloride-containing environment[J].Corrosion Science,2009,51:2355-2363. |
[15] | Y.MORIMOTO .Characterization of the Fe-Al Inhibition Layer Formed in the Initial Stages of Hot-dip Galvannealing[J].ISIJ International,1997(9):906-913. |
[16] | 庞建超,马瑞娜,温鸣,曹晓明.钢丝单镀Galfan合金耐蚀性能研究[J].河北工业大学学报,2006(01):76-80. |
[17] | 宋人英;王兴杰;唐宝骧.RE对锌基合金镀层耐腐蚀性能的影响[J].中国稀土学报,1991(04):315-318. |
[18] | Tzimas E.;Papadimitriou G. .Cracking mechanisms in high temperature hot-dip galvanized coatings[J].Surface & Coatings Technology,2001(1/3):176-185. |
[19] | MANDAL G K;BALASUBRAMANIAM R;MEHROTRA S P .Theoretical investigation of the interfacial reaction during hot-dip galvanizing of steel[J].The Minerals Metals&Materials Society and ASM International,2009,40A:637-645. |
[20] | L. CHEN;R. FOURMENTIN;J.R. Mc DERMID .Morphology and Kinetics of Interfacial Layer Formation during Continuous Hot-Dip Galvanizing and Galvannealing[J].Metallurgical and materials transactions. A, physical metallurgy and materials science,2008(9):2128-2142. |
[21] | TANG N-Y;ADAMS G R.The Physical Metallurgy of Zinc Coated Steel[M].Warrendale PA:TMS,1994:41-45. |
[22] | 苏旭平,李智,尹付成,贺跃辉,潘世文.热浸镀中硅反应性研究[J].金属学报,2008(06):718-722. |
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%