超音速火焰喷涂WC-CoCr涂层的腐蚀行为
Corrosion Behavior of WC-CoCr Coatings Prepared by High Velocity Oxygen Fuel Spraying
摘 要
采用超音速火焰(HVOF)喷涂技术在Q235钢上制备了WC-CoCr涂层, 借助X射线衍射仪、扫描电镜、显微硬度计等对涂层的相结构、显微组织和显微硬度进行了分析。以镀铬涂层作为对比材料, 用Parstat 2273型电化学综合测试系统测定涂层在不同环境下的耐腐蚀性。结果表明: 涂层厚度约为180 μm, 含有极少的空隙, 涂层的平均硬度约1 300 HV; 在质量分数为3.5%的NaCl溶液和1 mol/L的HCl溶液中, WC-CoCr涂层的耐腐蚀性明显优于镀铬涂层的耐腐蚀性; 而在1 mol/L的NaOH溶液中, WC-CoCr涂层的耐腐蚀性比镀铬涂层的要差, 这是因为镀铬涂层发生了剧烈的钝化作用。
WC-CoCr涂层
耐腐蚀性
电化学
金属陶瓷
HVOF spraying
WC-CoCr coating
corrosion resistance
electrochemistry
cermet
Abstract
WC-CoCr coatings were fabricated on Q235 steel by high velocity oxygen fuel (HVOF) spraying. The phase composition, microstructure and microhardness of the coatings were analyzed by X-ray diffraction, scanning electron microscope and microhardness tester. Electrochemical tests were carried out to compare the corrosion resistance of HVOF sprayed WC-CoCr coating to that of hard chromium coating via a Parstat 2273 advanced electrochemical system. The results showed that WC-CoCr coating had a thickness of 180 μm with few pores, and the average microhardness of the coating was about 1 300 HV. The corrosion resistance of WC-CoCr coating was better than that of hard chromium coating in 3.5% (mass fraction) NaCl solution and 1 mol/L HCl solution. However, the corrosion resistance of WC-CoCr coating was worse than that of hard chromium coating in 1 mol/L NaOH solution, which was due to the severe passivation of hard chromium coating.
中图分类号 TG174.44
所属栏目 试验与研究
基金项目 中央高校基本科研业务费资助项目(2013B34414); 河海大学大学生创新训练计划项目(2013102941002G)
收稿日期 2014/3/6
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备注乔磊(1993-), 男, 学士。
引用该论文: QIAO Lei,HONG Sheng,JIANG Shao-bo,LI Gang,YE Si-yu,WU Yu-ping. Corrosion Behavior of WC-CoCr Coatings Prepared by High Velocity Oxygen Fuel Spraying[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2014, 50(7): 476～479
乔磊,洪晟,姜少博,李钢,叶思妤,吴玉萍. 超音速火焰喷涂WC-CoCr涂层的腐蚀行为[J]. 理化检验－物理分册, 2014, 50(7): 476～479
被引情况:
【1】师 玮,吴玉萍,孙 昊,江佳阳,陈 洋,胡远远, "超音速火焰喷涂CoCrAlYTa-10%Al2O3涂层的组织与性能",理化检验－物理分册 52, 562-566(2016)
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参考文献
【1】TAN K S, WHARTON J A, WOOD R J K. Solid particle erosion-corrosion behaviour of a novel HVOF nickel aluminium bronze coating for marine applications-correlation between mass loss and electrochemical measurements[J].Wear, 2005, 258:629-640.
【2】SOUZA V A D, NEVILLE A. Aspects of microstructure on the synergy and overall material loss of thermal spray coatings in erosion-corrosion environments[J].Wear, 2007, 263:339-346.
【3】李博宇, 董星龙, 刘园园, 等.等离子喷涂法纳米结构WC-12Co涂层的微型结构与形成机理研究[J].材料工程, 2006 (6):40-45.
【4】马光, 于艳爽, 王国刚, 等.活性燃烧高速燃气喷涂WC-CoCr涂层的微观组织及性能[J].金属热处理, 2008, 33(2):36-40.
【5】王振强.热喷涂WC-Co/Cr与Al2O3/TiO2涂层的盐溶液腐蚀行为研究[D].哈尔滨:哈尔滨工业大学, 2009.
【6】邓春明, 周克崧.Cr对超音速火焰喷涂WC-Co涂层抗中性盐雾腐蚀性能的影响[J].材料开发与应用, 2007, 22(3):33-36.
【7】HONG S, WU Y P, LI G Y, et al. Microstructural characteristics of high-velocity oxygen-fuel (HVOF) sprayed nickel-based alloy coating[J].Journal of Alloys and Compounds, 2013, 581:398-403.
【8】王从曾, 刘会亭.材料性能学[M].北京: 北京工业大学出版社, 2010.
【9】向锦涛.WC/Co基热喷涂粉末与涂层制备及性能研究[D].长沙: 湖南大学, 2012.
【10】任艳萍, 陈锦虹.镀锌层三价铬钝化膜腐蚀行为的研究[J].材料保护, 2007, 40(2):7-10.
【2】SOUZA V A D, NEVILLE A. Aspects of microstructure on the synergy and overall material loss of thermal spray coatings in erosion-corrosion environments[J].Wear, 2007, 263:339-346.
【3】李博宇, 董星龙, 刘园园, 等.等离子喷涂法纳米结构WC-12Co涂层的微型结构与形成机理研究[J].材料工程, 2006 (6):40-45.
【4】马光, 于艳爽, 王国刚, 等.活性燃烧高速燃气喷涂WC-CoCr涂层的微观组织及性能[J].金属热处理, 2008, 33(2):36-40.
【5】王振强.热喷涂WC-Co/Cr与Al2O3/TiO2涂层的盐溶液腐蚀行为研究[D].哈尔滨:哈尔滨工业大学, 2009.
【6】邓春明, 周克崧.Cr对超音速火焰喷涂WC-Co涂层抗中性盐雾腐蚀性能的影响[J].材料开发与应用, 2007, 22(3):33-36.
【7】HONG S, WU Y P, LI G Y, et al. Microstructural characteristics of high-velocity oxygen-fuel (HVOF) sprayed nickel-based alloy coating[J].Journal of Alloys and Compounds, 2013, 581:398-403.
【8】王从曾, 刘会亭.材料性能学[M].北京: 北京工业大学出版社, 2010.
【9】向锦涛.WC/Co基热喷涂粉末与涂层制备及性能研究[D].长沙: 湖南大学, 2012.
【10】任艳萍, 陈锦虹.镀锌层三价铬钝化膜腐蚀行为的研究[J].材料保护, 2007, 40(2):7-10.
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