电流密度对ZL108钨酸钠改性微弧氧化膜特性影响
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摘要
在不同电流密度下制备了ZL108 Na2WO4改性微弧氧化膜,研究了电流密度对Na2WO4改性微弧氧化膜特性的影响。利用扫描电镜(SEM)观察氧化膜表面形貌,能谱仪(EDS)、X射线衍射仪(XRD)以及X射线光电子能谱(XPS)分别测试了氧化膜截面元素分布、相组成以及W的化合价,极化曲线测试了耐蚀性。结果表明,随电流密度增大,微弧氧化膜由致密变为多孔,微孔数量增加、尺寸变大,膜层增厚。膜层中W、O含量增加,Al含量下降。微弧氧化膜由γ-Al2O3、Al和Si 3个相组成,W元素在膜中主要以WO3形式存在。微弧氧化膜的耐蚀性随电流密度增加而提高。
In order to investigate the effect of current density on characteristics of sodium tungstate modified microarc oxidation( MAO) coatings on ZL108 alloy,which was treated by using MAO in sodium tungstate electrolyte with different current density. Surface morphology,distribution of elements,valence of tungsten and phase component of the MAO coatings were analyzed by SEM,EDS analysis,XPS and XRD,respectively. The corrosion resistance of the MAO coatings was measured by polarization curve. The results show that diameter and amount of pores and thickness of the MAO coatings increases with increasing current density. The content of oxygen and tungsten element in the MAO coatings increase,and the content of aluminum declines with the increasing of current density. The MAO coatings are composed of γ-Al2O3,Al and Si phases. The tungsten exists in the micro-arc coatings as WO3. The corrosion resistance of the MAO coatings increase with the increasing of current density.
In order to investigate the effect of current density on characteristics of sodium tungstate modified microarc oxidation( MAO) coatings on ZL108 alloy,which was treated by using MAO in sodium tungstate electrolyte with different current density. Surface morphology,distribution of elements,valence of tungsten and phase component of the MAO coatings were analyzed by SEM,EDS analysis,XPS and XRD,respectively. The corrosion resistance of the MAO coatings was measured by polarization curve. The results show that diameter and amount of pores and thickness of the MAO coatings increases with increasing current density. The content of oxygen and tungsten element in the MAO coatings increase,and the content of aluminum declines with the increasing of current density. The MAO coatings are composed of γ-Al2O3,Al and Si phases. The tungsten exists in the micro-arc coatings as WO3. The corrosion resistance of the MAO coatings increase with the increasing of current density.
引文
[1]蒋百灵,张先锋,朱静.铝、镁合金微弧氧化技术研究现状和产业化前景[J].金属热处理,2004,29(1):23-29.JIANG Bai-ling,ZHANG Xian-feng,ZHU Jing.Study situation and industrial prospect on micro-Arc oxidation of aluminum and magnesium alloys[J].Heat Treatment of Metals,2004,29(1):23-29.
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[10]Chun-Chieh Tseng,Jeou-Long Lee,Tzu-Hsuan Kuo,et al.The influence of sodium tungstate concentration and anodizing conditions on microarc oxidation(MAO)coatings for aluminum alloy[J].Surface&Coatings Technology,2012,206(16):3437-3443.
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[12]李光岩,王从曾,张连宝.添加Na2WO4对镁合金微弧氧化陶瓷层成分及结构的影响[J].金属热处理,2007,32(4):58-60.LI Guang-yan,WANG Cong-zeng,ZHANG Lian-bao.Influence of addition Na2WO4on the phase constituent and structure of magnesium alloy microarc oxidated ceramic layer[J].Heat Treatment of Metals,2007,32(4):58-60.
[13]郑宏晔,王永康,曹立,等.Na2WO4对铝合金表面微弧氧化陶瓷层性能的影响[J].浙江大学学报:工学版,2005,39(5):742-745.ZHENG Hong-ye,WANG Yong-kang,CAO Li,et al.Effect of Na2WO4on properties of micro-arc oxidation ceramic coatings on aluminum alloy[J].Journal of Zhejiang University:Engineering Science,2005,39(5):742-745.
[14]颜家振,张月,刘阳思,等.掺钨VO2薄膜制备及其热致相变特性研究[J].稀有金属材料与工程,2008,37(9):1648-1650.YAN Jia-zhen,ZHANG Yue,LIU Yang-si,et al.Preparation of W doped VO2films and study on its thermochromic properties[J].Rare Metal Materials and Engineering,2008,37(9):1648-1650.
[15]王晓光,江月山,杨乃恒,等.氧化钨薄膜着退色机制的XPS和XRD[J].东北大学学报:自然科学版,1997,18(3):321-324.WANG Xiao-guang,JIANG Yue-shan,YANG Nai-heng,et al.Study of the electrochromics mechanism of WOx film by XPS and XRD techniques[J].Journal of Northeastern University:Natural Science,1997,18(3):321-324.
[16]王平,王春华,杨军,等.封孔处理对ZL108铸铝微弧氧化膜性能的影响[J].材料保护,2011,44(10):51-52.WANG Ping,WANG Chun-hua,YANG Jun,et al.Effect of sealing treatment on properties of micro-arc oxidation film of ZL108 cast aluminum substrate[J].Materials Protection,2011,44(10):51-52.
[2]Van T B,Brown S D,Wirtz G P.Mechanism of anodic spark deposition[J].American Ceramic Society Bulletin,1977,56(6):563-565.
[3]Wirtz G P,Brown S D,Kriven W M.Ceramic coating by anodic spark deposition[J].Materials and Manufacturing Processes,1991,6(1):87-92.
[4]Xue W,Deng Z,Lai Y,et al.Analysis of phase distribution for ceramic coatings formed by microarc oxidation on aluminum alloy[J].Journal of the American Ceramic Society,1998,81(5):1365-1368.
[5]蒋百灵,白力静,蒋永锋.铝合金微弧氧化陶瓷层组织结构与性能的研究[J].中国机械工程,2001,12(3):331-333.JIANG Bai-ling,BAI Li-jing,JIANG Yong-feng.Study on microstructures and properties of aluminum alloy microarc oxidation coating[J].China Mechanical Engineering,2001,12(3):331-333.
[6]熊仁章,盛磊,杨生荣,等.添加剂对铝合金微弧氧化陶瓷涂层结构和耐磨性能的影响[J].兵器材料科学与工程,2002,26(25):29-33.XIONG Ren-zhang,SHENG Lei,YANG Sheng-rong,et al.Effects of additives on microstructures and wear resistance of ceramic coatings produced by micro-arc oxidation on Al-alloy surface[J].Ordnance Material Science and Engineering,2002,26(25):29-33.
[7]王平,郭小阳,黄有为.Na2WO4浓度ZAlSi12Cu2Mg1微弧氧化陶瓷膜特性的影响[J].稀有金属材料材料与工程,2012,41(S2):545-548.WANG Ping,GUO Xiao-yang,HUANG You-wei.Effects of of Na2WO4on the characteristics of ceramic film formed on ZAlSi12Cu2Mg1 alloy by microarc oxidation[J].Rare Metal Materials and Engineering,2012,41(S2):545-548.
[8]ZHENG H Y,WANG Y K,LI B S,et al.The effects of Na2WO4concentration on the properties of microarc oxidation coatings on aluminum alloy[J].Materials Letters,2005,59(2/3):139-142.
[9]DING Jun,LIANG Jun,HU Li-tian,et al.Effects of sodium tungstate on characteristics of microarc oxidation coatings formed on magnesium alloy in silicate-KOH electrolyte[J].Transactions of Nonferrous Metals Ssociety of China,2007,17(2):244-249.
[10]Chun-Chieh Tseng,Jeou-Long Lee,Tzu-Hsuan Kuo,et al.The influence of sodium tungstate concentration and anodizing conditions on microarc oxidation(MAO)coatings for aluminum alloy[J].Surface&Coatings Technology,2012,206(16):3437-3443.
[11]蒋百灵,赵仁兵,梁戈,等.Na2WO4对铝合金微弧氧化陶瓷层形成过程及耐磨性的影响[J].材料导报,2006,20(9):155-157.JIANG Bai-ling,ZHAO Ren-bing,LIANG Ge,et al.Effect of Na2WO4on properties of micro-arc oxidation(MAO)ceramic coatings and wear resistance of aluminum alloy[J].Materials Review,2006,20(9):155-157.
[12]李光岩,王从曾,张连宝.添加Na2WO4对镁合金微弧氧化陶瓷层成分及结构的影响[J].金属热处理,2007,32(4):58-60.LI Guang-yan,WANG Cong-zeng,ZHANG Lian-bao.Influence of addition Na2WO4on the phase constituent and structure of magnesium alloy microarc oxidated ceramic layer[J].Heat Treatment of Metals,2007,32(4):58-60.
[13]郑宏晔,王永康,曹立,等.Na2WO4对铝合金表面微弧氧化陶瓷层性能的影响[J].浙江大学学报:工学版,2005,39(5):742-745.ZHENG Hong-ye,WANG Yong-kang,CAO Li,et al.Effect of Na2WO4on properties of micro-arc oxidation ceramic coatings on aluminum alloy[J].Journal of Zhejiang University:Engineering Science,2005,39(5):742-745.
[14]颜家振,张月,刘阳思,等.掺钨VO2薄膜制备及其热致相变特性研究[J].稀有金属材料与工程,2008,37(9):1648-1650.YAN Jia-zhen,ZHANG Yue,LIU Yang-si,et al.Preparation of W doped VO2films and study on its thermochromic properties[J].Rare Metal Materials and Engineering,2008,37(9):1648-1650.
[15]王晓光,江月山,杨乃恒,等.氧化钨薄膜着退色机制的XPS和XRD[J].东北大学学报:自然科学版,1997,18(3):321-324.WANG Xiao-guang,JIANG Yue-shan,YANG Nai-heng,et al.Study of the electrochromics mechanism of WOx film by XPS and XRD techniques[J].Journal of Northeastern University:Natural Science,1997,18(3):321-324.
[16]王平,王春华,杨军,等.封孔处理对ZL108铸铝微弧氧化膜性能的影响[J].材料保护,2011,44(10):51-52.WANG Ping,WANG Chun-hua,YANG Jun,et al.Effect of sealing treatment on properties of micro-arc oxidation film of ZL108 cast aluminum substrate[J].Materials Protection,2011,44(10):51-52.