对电弧喷涂 Zn-Al-Si 合金涂层进行热等静压(HIP)处理，通过电化学测试、盐水(3.5%NaCl，质量分数)全浸实验、扫描电镜观察和能谱分析，研究热等静压处理对电弧喷涂Zn-Al-Si合金涂层耐蚀性能的影响。结果表明：300℃、1 h、150 MPa HIP处理能大幅降低电弧喷涂Zn-Al-Si合金涂层的腐蚀电流，促进钝化现象的产生，提高耐腐蚀性能和防护寿命。HIP处理改善了涂层表面不平整结构、促进了表面元素分布；基本消除了涂层孔隙结构，孔隙率降低了87.15%，避免闭塞电池腐蚀的发生和涂层内部孔隙拓展延伸。经 HIP 处理后，涂层元素的均匀分布、平整的表面结构和致密的内部组织是降低腐蚀电流及产生钝化现象的主要原因。
The influence of hot isostatic pressing (HIP) on the corrosion resistance of arc spraying Zn-Al-Si alloy coating was studied by electrochemical test, salt solution (3.5%NaCl, mass fraction) immersion test, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results indicate that when the alloy is HIP-processed at 150 MPa and 300℃for 1 h, the corrosion current of arc spraying Zn-Al-Si coating is greatly reduced, the passivation phenomenon is promoted, and the corrosion resistance and protective life are improved. HIP treatment flats the surface, improves the element distribution, greatly eliminates the pore structure. The porosity is decreased by 87.15%, occluded cell corrosion and pore extension are avoided. Uniform element distribution, flat surface structure and dense internal tissue are the main reasons to cause the reduction of corrosion current and passivation phenomenon.
参考文献
| [1] | 王麟;陶诗君;萧以德;萧弘烨伍建华 .热喷涂鋅-铝合金涂层对钢结构防护性能研究[J].公路交通科技,2010,9(27):25-30. |
| [2] | 陈琳,张三平,周学杰.降低热喷涂涂层孔隙率的工艺技术[J].上海金属,2004(04):41-43. |
| [3] | 李言涛,姜信德,侯保荣.喷涂锌铝（ZAZA）覆盖层在海洋环境中的腐蚀[J].腐蚀与防护,2010(08):591-594. |
| [4] | 李春玲 .Zn-Al伪合金涂层的制备及耐海洋腐蚀性能研究[D].中国石油大学(华东),2010. |
| [5] | MATEOS J;CUETOS J M;VIJANDE R et al.Tribological properties of plasma sprayed and laser remelted 75/25Cr 3 C 2/NiCr coatings[J].Tribology International,2001,34:345-351. |
| [6] | Liscano S;Gil L;Staia MH .Correlation between microstructural characteristics and the abrasion wear resistance of sealed thermal-sprayed coatings[J].Surface & Coatings Technology,2005(5/6):1310-1314. |
| [7] | 于惠博,孙宏飞,武彬,刘美淋.降低涂层孔隙率的研究进展[J].材料导报,2007(01):68-71. |
| [8] | ALLAN M L;BERNDT C C .Plasma sprayed Ni-Al coatings for safe ending heat exchanger tubes DE-AC02-98CHl0886[R].Washington,D.C,1998. |
| [9] | 张羽廷 .热等静压处理对铀表面铝(钛)镀层及界面特性的影响[D].绵阳:中国工程物理研究院,2010. |
| [10] | 王庆富,张羽廷,谢东华,张鹏程,刘婷婷.热等静压处理对铀表面铝镀层耐腐蚀性能的影响[J].稀有金属材料与工程,2011(09):1671-1675. |
| [11] | ZHENG Liyun,XIONG Weihao,YAN Xianmei,LI Guo'an.Microstructure and mechanical properties of hot isostatically pressed cermets with TiN coatings[J].稀有金属(英文版),2006(06):643-648. |
| [12] | Aminul Islam;Zoheir N. Farhat .The influence of porosity and hot isostatic pressing treatment on wear characteristics of cast and P/M aluminum alloys[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2011(9/10):1594-1601. |
| [13] | 周庆生;李俊兰;阚月琴;陈增泉.热喷涂涂层的形成过程和涂层结构的特性[J].机械科学与技术,1990(04):38-41. |
| [14] | 张鉴清.电化学测试技术[M].北京:化学工业出版社,2011:160. |
| [15] | Hernandez M;Genesca J;Uruchurtu J;Galliano F;Landolt D .Effect of an inhibitive pigment zinc-aluminum-phosphate (ZAP) on the corrosion mechanisms of steel in waterborne coatings[J].Progress in Organic Coatings: An International Review Journal,2006(2/3):199-206. |
| [16] | LIU Yan,ZHU Zi-xin,CHEN Yong-xiong,XU Bin-shi,Ma Shi-ning,LI Zhuo-xin.Electrochemical corrosion behavior of arc sprayed Zn-Al coatings[J].中国有色金属学会会刊（英文版）,2004(z1):443-445. |
| [17] | A. P. Yadav;H. Katayama;K. Noda;H. Masuda;A. Nishikata;T. Tsuru .Effect of Al on the galvanic ability of Zn-Al coating under thin layer of electrolyte[J].Electrochimica Acta,2007(7):2411-2422. |
| [18] | Peng DQ.;Bai XD.;Chen XW.;Zhou QG.;Liu XY.;Yu RH. .Comparison of electrochemical behavior of zirconium and zircaloy-4 implanted with Y and Ce ions[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2004(1/4):259-271. |
| [19] | 韩树民,郑炀曾,于升学,徐军明.锌铝铬膜的防腐性能与机理[J].中国有色金属学报,2002(03):619-623. |
| [20] | 杨振波,杨忠林,郭万生,宋广成.鳞片状富锌涂层耐蚀机理的研究[J].中国涂料,2006(01):19-21. |
| [21] | 蒋穹,缪强,姚正军,魏小昕.水性Al-Zn-Si合金涂层微观组织及腐蚀性能研究[J].中国腐蚀与防护学报,2012(04):311-316. |
| [22] | 刘安强,肖葵,董超芳,王恩清,魏丹,高瑾,李晓刚.电弧喷涂锌铝伪合金涂层的耐中性盐雾腐蚀性能[J].材料保护,2011(12):12-15. |
| [23] | 刘幼平 .蚀孔、缝隙及裂缝内闭塞电池腐蚀行为及其控制方法.Ⅰ:闭塞电池腐蚀理论研究方法及微区环境效应[J].腐蚀与防护,1995,16(03):110-114. |
| [24] | 曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,1985:323. |
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