| 钢铁表面纯锆盐转化膜技术研究现状与进展 |
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| 引用本文： | 曹献龙,孙培入,刘洋,徐光旭,高正源,邓洪达,兰伟.钢铁表面纯锆盐转化膜技术研究现状与进展[J].表面技术,2017,46(8):72-78. |
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| 作者姓名： | 曹献龙 孙培入 刘洋 徐光旭 高正源 邓洪达 兰伟 |
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| 作者单位： | 重庆科技学院冶金与材料工程学院,重庆401331;纳微复合材料与器件重庆市重点实验室,重庆401331;重庆交通大学机电与车辆工程学院,重庆400074;重庆市计量质量检测研究院/国家铝镁合金及制品质量监督检测中心,重庆401121 |
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| 基金项目： | 重庆市科委基础与前沿研究计划项目（CSTC2015JCYJA50003）；重庆市教委科学技术研究项目（KJ1401314、KJ1401310）；院士专家工作站合作项目（CKYS2014Z03）；重庆科技学院重点项目培育基金（CK2014Z22）；重庆市南川区科技计划项目（CX201407）；2015年度重庆科技学院大学生科技创新训练计划项目 |
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| 摘 要： | 锆盐转化膜技术是一种十分重要的环境友好型钢铁表面处理技术,有望完全取代磷酸盐和铬酸盐转化技术。锆盐转化膜的耐蚀性与磷酸盐和铬酸盐转化膜接近,对有机涂层和钢铁基体有着优异的附着力。从纯锆盐转化基本原理、锆盐体系选择、制备方法、转化工艺参数控制、膜层形貌与结构、膜层耐蚀行为、膜层与后续涂层的附着力等方面,对国内外钢铁表面纯锆盐转化膜技术的研究进展和成果进行了综述。纯锆盐转化技术采用的转化液以氟锆酸及其盐为主,制备方法主要是浸渍法。为了获得质量稳定的纯锆盐转化膜,需要控制工艺参数:Zr~(4+)体积分数3%~5%,pH值3.5~4.5,转化时间90 s左右,温度20~35℃。锆盐转化膜一般为100~350 nm厚的双层结构,由纳米颗粒、小结节和聚集体构成,这种结构发挥的锚固作用会显著增加基体与后续涂层的结合强度。但是,锆盐转化成膜机理不够成熟,工艺欠稳定,在实际工业生产应用中仍面临挑战。所以,成膜机制和工艺稳定性的深入探究是未来锆盐转化膜的重点研究方向。
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| 关 键 词： | 锆盐 化学转化 钢铁 耐蚀性 成膜机制 前处理 |
| 收稿时间： | 2017/1/3 0:00:00 |
| 修稿时间： | 2017/8/20 0:00:00 |
Research Status and Progress of Pure Zirconium Salt Conversion Coating Technology Applied on Steel Surface |
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| CAO Xian-long,SUN Pei-ru,LIU Yang,XU Guang-xu,GAO Zheng-yuan,DENG Hong-da and LAN Wei.Research Status and Progress of Pure Zirconium Salt Conversion Coating Technology Applied on Steel Surface[J].Surface Technology,2017,46(8):72-78. |
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| Authors: | CAO Xian-long SUN Pei-ru LIU Yang XU Guang-xu GAO Zheng-yuan DENG Hong-da and LAN Wei |
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| Affiliation: | 1.School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2.Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing 401331, China,1.School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2.Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing 401331, China,1.School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2.Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing 401331, China,1.School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2.Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing 401331, China,1.School of Mechanotronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2.Chongqing Academy of Metrology and Quality Inspection/National Centre for Quality Supervision and Inspection of Aluminum and Magnesium Alloy Products, Chongqing 401121, China,1.School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2.Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing 401331, China and 1.School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2.Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing 401331, China |
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| Abstract: | As one of vital and environment-friendly surface treatment technologies applied on the steel surface,Zirconium salt conversion coating technology is expected to completely replace phosphate and chromate conversion technologies.The zirconium salt conversion coating exhibited high corrosion resistance which was almost comparable with that of conventional phosphate and chromate conversion coatings.In addition,it exhibited excellent adhesion to steel and organic coating.Research progress and achievements on zirconium salt conversion technologies applied on steel surface at home and abroad were reviewed in aspects including basic principle of zirconium salt conversion,selection of zirconium salt,preparation method,conversion process parameter control,coating morphology and structure,coating anti-corrosion behavior and adhesion to subsequent coating.Zirconium conversion film was usually prepared in dipping method and its conversion solution was mainly composed of hexafluorozirconic acid and its salts.In order to obtain high-quality conversion film,process parameters as follows should be controlled:Zr4+] should be 3％ ～5％,pH 3.5～4.5,t≈90 s and temperature 20～35 ℃.Zirconium conversion coating was generally a 100～350 nm thick two-layered structure consisting of nano particles,small nodules and clusters.Anchoring effect of the structure could significantly improve the adhesion between substrate and subsequent coating.However,the zirconium salt conversion technology is still confronted with some challenges in the practical industrial production applications due to its underdeveloped conversion mechanism and unstable conversion process.Therefore,thorough investigation of film-forming mechanism and process stability were the focus of research on zirconium salt conversion film in the future. |
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| Keywords: | zirconium salt chemical conversion steel corrosion resistance film-forming mechanism pretreatment |
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