组分调制Ni/Cr多层膜合金化制备Ni-Cr合金覆盖层的耐腐蚀特性
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摘要
利用双槽电沉积法制备组分调制Ni/Cr多层膜,探讨了Ni/Cr多层膜的合金化特性。借助SEM和EDS对Ni-Cr合金覆盖层的表面形貌、微观结构以及化学组成进行了表征。结果表明,减小周期厚度,提高热处理温度,延长保温时间有助于提高多层膜的合金化程度。经高温处理后,Ni-Cr合金覆盖层化学组分均一,与理论值基本吻合;其微观形貌由原来的结节状或颗粒状结构转变为块状结构,并且未产生热应力开裂等现象。与相同厚度的镍镀层和铬镀层比较,Ni-Cr合金覆盖层具有更好的耐腐蚀性能。
Ni-Cr alloy coatings were prepared via a two-step process, namely Ni/Cr multilayered films of thickness modulation were firstly prepared by dual bath technique, which then subjected to alloying treatment at proper elevated temperature. The microstructure and chemical composition of Ni-Cr alloy coatings were characterized by means of SEM and EDS. The results show that with the decreasing period of modulation as well as the increasing heat-treatment temperature and time, the alloying process for Ni/Cr multilayered films could be expediently realized. After high temperature treatment, the chemical composition of the Ni-Cr alloy coatings is homogeneous on average, which is basically consistent with the theoretical value. Of which the surface morphology changes from the original nodular-or granular-like structure to block-like structure, while no thermal stress cracking is observed. Besides, their corrosion resistance was evaluated in comparison with nickel coating and chromium coating of the same thickness. It is found that the Ni-Cr alloy coatings have better corrosion resistance.
Ni-Cr alloy coatings were prepared via a two-step process, namely Ni/Cr multilayered films of thickness modulation were firstly prepared by dual bath technique, which then subjected to alloying treatment at proper elevated temperature. The microstructure and chemical composition of Ni-Cr alloy coatings were characterized by means of SEM and EDS. The results show that with the decreasing period of modulation as well as the increasing heat-treatment temperature and time, the alloying process for Ni/Cr multilayered films could be expediently realized. After high temperature treatment, the chemical composition of the Ni-Cr alloy coatings is homogeneous on average, which is basically consistent with the theoretical value. Of which the surface morphology changes from the original nodular-or granular-like structure to block-like structure, while no thermal stress cracking is observed. Besides, their corrosion resistance was evaluated in comparison with nickel coating and chromium coating of the same thickness. It is found that the Ni-Cr alloy coatings have better corrosion resistance.
引文
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[2]Wang C,Ju S H,Xun S L,et al.Progress in research on nickelbased corrosion resistant alloys[J].Mater.Rev.,2009,23(3):71(王成,巨少华,荀淑玲等.镍基耐蚀合金研究进展[J].材料导报,2009,23(3):71)
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[5]Li X F,Yang Z Y,Qin H,et al.High temperature corrosion behavior of a new-type high-Cr-content coating exposured to H2S-cotaining environment[J].Chin.J.Rare Met.,2001,25:440(李学锋,杨中元,秦颢等.新型高铬镍基合金涂层在H2S气氛中抗高温腐蚀性能的研究[J].稀有金属,2001,25:440)
[6]Chen L,Gong Z Q,Huang Z J,et al.Study of nickel-chromium electrodeposit[J].Electroplat.Finish.,1998,17(4):4(陈磊,龚竹青,黄志杰等.电沉积镍铬合金的研究[J].电镀与涂饰,1998,17(4):4)
[7]Song Y B,Chin D T.Current efficiency and polarization behavior of trivalent chromium electrodeposition process[J].Electrochim.Acta,2002,48:349
[8]Protsenko V S,Danilov F I,Gordiienko V O,et al.Electrodeposition of hard nanocrystalline chrome from aqueous sulfate trivalent chromium bath[J].Thin Solid Films,2011,520:380
[9]Zeng Z X,Zhang Y X,Zhao W J,et al.Role of complexing ligands in trivalent chromium electrodeposition[J].Surf.Coat.Technol.,2011,205:4771
[10]Duan D L,Li S,Ding X J,et al.Preparation of Ni-Cr alloy foams by electrodeposition technique[J].Mater.Sci.Technol.,2008,24:461
[11]Sun J,Du D X,Lv H F,et al.Microstructure and corrosion resistance of pulse electrodeposited Ni-Cr coatings[J].Surf.Eng.,2015,31:406
[12]Imanieh I,Yousefi E,Dolati A,et al.Experiments design for hardness optimization of the Ni-Cr alloy electrodeposited by pulse plating[J].Acta Metall.Sin.(Engl.Lett.),2013,26:558
[13]Lin K L,Hsu C J,Hsu I M,et al.Electroplating of Ni-Cr on steel with pulse plating[J].J.Mater.Eng.Perform.,1992,1:359
[14]Zhou Y B,Zhao G G,Zhang H J.Fabrication and wear properties of co-deposited Ni-Cr nanocomposite coatings[J].Trans.Nonferrous Met.Soc.China,2010,20:104
[15]Zhang H,Liu L W,Bai J S,et al.Corrosion behavior and microstructure of electrodeposited nano-layered Ni-Cr coatings[J].Thin Solid Films,2015,595:36
[16]Du D X,Sun J,Lv H F,et al.Microstructure and corrosion-resistance performance of Ni-Cr alloy coatings by direct current and pulse current electrodeposition[J].Rare Met.Mater.Eng.,2016,45:2046(杜登学,孙健,吕鸿飞等.直流与脉冲电沉积Ni-Cr合金镀层的结构及耐蚀性[J].稀有金属材料与工程,2016,45:2046)
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[20]Zhu X Y,Liu X J,Zeng F,et al.Microstructure and nanoindentation hardness of Ag/Fe multilayers[J].Trans.Nonferrous Met.Soc.China,2010,20:110
[21]Etminanfar M R,Sohi M H.Corrosion resistance of multilayer coatings of nanolayered Cr/Ni electrodeposited from Cr(III)-Ni(II)bath[J].Thin Solid Films,2012,520:5322
[22]Fei J Y,Wilcox G D.Electrodeposition of zinc-nickel compositionally modulated multilayer coatings and their corrosion behaviours[J].Surf.Coat.Technol.,2006,200:3533
[23]Luo L L,Li X,Fei J Y.Magnetic properties of Ni-Fe alloy coatings prepared by alloying Ni/Fe multilayer films[J].Surf.Eng.,2015,31:679
[24]Luo L L,Fei J Y,Wang L,et al.Alloying of compositionally modulated Cu/Ni multilayer films and corrosion performance of Cu-Ni alloy coatings[J].J.Chin.Soc.Corros.Prot.,2014,34:523(骆立立,费敬银,王磊等.组分调制Cu/Ni多层膜的合金化及其合金化镀层的耐蚀特性[J].中国腐蚀与防护学报,2014,34:523)
[25]Ali J A,Ambrose J R.The relationship between copper component dissolution kinetics and the corrosion behaviour of Monel-400 alloy in de-aerated NaCl solutions[J].Corros.Sci.,1992,33:1147
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