采用热浸镀法在一定的助镀条件下制备了不同镁含量的Zn-Al-Mg合金镀层.利用扫描电镜、能谱仪及X射线衍射仪(XRD)分析了镀层的组织结构；采用NaCl溶液全浸试验和电化学试验评价镀层的耐蚀性能.结果表明,在一定范围内,随着镀液中镁含量的增加,镀层组织更加均匀、致密,镀层耐蚀性能也随之提高；当镀液中加入0.7％镁时制备的镀层耐蚀性最好,超过0.7％时镀层的耐蚀性能反而下降.
Zn-Al-Mg alloy coatings with different magnesium contents were prepared by hot dip method.Microstructures and compositions of the coatings were studied by SEM,EDS and XRD.NaCl solution immersion test,electrochemical thermal shock test were used to study the corrosion resistance of the coatings.The results show that the increasing of Mg contents can make the coating morphology more uniform and dense,improve the corrosion resistance in a certain range.Zn-Al-Mg alloy coatings with Zn-5％ Mg-0.7％,showed the best corrosion resistance,the corrosion resistance became worse when the Mg content was beyond 0.7％.
参考文献
| [1] | Shibli SMA;Manu R;Dilimon VS .Effect of nickel-rich barrier layer on improvement of hot-dip zinc coating[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2005(1/4):179-185. |
| [2] | 李艳春,汪红,张丛春,姚锦元,丁桂甫,赵小林.不同基底上Ni微结构镀层结合强度的研究[J].功能材料,2012(21):2954-2957,2961. |
| [3] | Boshkov N;Petrov K;Raichevski G .Corrosion behavior and protective ability of multilayer Galvanic coatings of Zn and Zn-Mn alloys in sulfate containing medium[J].Surface & Coatings Technology,2006(20/21):5995-6001. |
| [4] | 周有福.极好的耐腐蚀Zn-Al-Mg-Si合金热浸镀锌薄钢板[J].武钢技术,2004(02):56-57,61. |
| [5] | 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].Surface & Coatings Technology,2010(7):2578-2584. |
| [6] | 仲海峰,刘邦津,张启富.国外钢板热镀锌技术进展[J].腐蚀与防护,2002(11):474-478. |
| [7] | 许红,冀英杰.热浸镀新型Zn-Al-Mg合金镀层耐蚀性能研究[J].中国科技信息,2011(07):170-171. |
| [8] | Shih HC.;Hsu JW.;Sun CN.;Chung SC. .The lifetime assessment of hot-dip 5% Al-Zn coatings in chloride environments[J].Surface & Coatings Technology,2002(1):70-75. |
| [9] | R.M. Souto;L. Fernandez-Merida;S. Gonzalez;D.J. Scantlebury .Comparative EIS study of different Zn-based intermediate metallic layers in coil-coated steels[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2006(5):1182-1192. |
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