纳米TiO_2颗粒对电沉积Zn-Ni合金镀层组织及其耐蚀性的影响
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摘要
为研究纳米粒子对于Zn-Ni合金镀层质量的影响,以双向脉冲电沉积方法制备了ZnNi-TiO_2复合镀层,主要从微观形貌、成分、厚度和耐蚀性对镀层进行评价。经研究表明,纳米TiO_2颗粒的引入对于所得复合镀层的形貌及成分均有一定的影响,且具有细化晶粒的作用。TiO_2颗粒会占据阴极表面的活性位点,抑制Zn~(2+)和Ni~(2+)的沉积。除此之外,TiO_2颗粒会破坏Zn(OH)_2膜的连续性,在颗粒尺寸较大时破坏性更严重,对于Zn~(2+)沉积的阻碍更为明显。同时,纳米TiO_2颗粒的引入会增加镀层厚度,并提高耐蚀性。
In order to study the effect of nanoparticles on the coating quality of Zn-Ni alloy,Zn-Ni-TiO_2 composite coating was prepared by bidirectional pulse electrodeposition method.The coating was mainly evaluated from macroscopic morphology,composition,thickness,and corrosion resistance.The study showed that the introduction of nano TiO_2 particles had a certain impact on the morphology and composition of the composite coating,and had the effect of grain refinement.TiO_2 particles will occupy the active site on the surface of the cathode and inhibits the deposition of Zn~(2+) and Ni~(2+).In addition,TiO_2 particles destroys the continuity of the Zn(OH)_2 film.And when the particle size is larger,the destructiveness is more serious and the hindrance to Zn~(2+)deposition is more obvious.At the same time,the introduction of nano TiO_2 particles will increase the coating thickness and improve the corrosion resistance.
In order to study the effect of nanoparticles on the coating quality of Zn-Ni alloy,Zn-Ni-TiO_2 composite coating was prepared by bidirectional pulse electrodeposition method.The coating was mainly evaluated from macroscopic morphology,composition,thickness,and corrosion resistance.The study showed that the introduction of nano TiO_2 particles had a certain impact on the morphology and composition of the composite coating,and had the effect of grain refinement.TiO_2 particles will occupy the active site on the surface of the cathode and inhibits the deposition of Zn~(2+) and Ni~(2+).In addition,TiO_2 particles destroys the continuity of the Zn(OH)_2 film.And when the particle size is larger,the destructiveness is more serious and the hindrance to Zn~(2+)deposition is more obvious.At the same time,the introduction of nano TiO_2 particles will increase the coating thickness and improve the corrosion resistance.
引文
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[3]Ghaziof S,Kilmartin P A,Gao W.Electrochemical studies of sol-enhanced Zn-Ni-Al2O3composite and Zn-Ni alloy coatings[J].Journal of Electroanalytical Chemistry,2015(755):63-70.
[4]Ghaziof S,Gao W.Zn-Ni-Al2O3nano-composite coatings prepared by sol-enhanced electroplating[J].Applied Surface Science,2015(351):869-879.
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[7]Blejan D,Bogdan D,Pop M,et al.Structure,morphology and corrosion resistance of Zn-Ni-Ti O2composite coatings[J].Optoelectronics and Advanced Materials-Rapid Communications,2011,5(1):25-29.
[8]Gomes A,Almeida I,Frade T,et al.Stability of Zn-NiTi O2and Zn-Ti O2nanocomposite coatings in near-neutral sulphate solutions[J].Journal of Nanoparticle Research,2012(14):1-13.
[9]沈品华,屠振密.电镀锌及锌合金[M].北京:机械工业出版社,2001.Shen Pinhua,Tu Zhenmi.Electroplating of zinc and zinc alloys[M].Beijing:China Machine Press,2001.(in Chinese).
[10]何欣,湛兰,王云鹏.电流波形对电沉积Zn-Ni合金镀层的影响[J].中国体视学与图像分析,2018,23(4):378-385.He Xin,Zhan Lan,Wang Yunpeng.Effect of current waveform on electrodeposited Zn-Ni alloy coating[J].Chinese Journal of Stereology and Image Analysis,2018,23(4):378-385.(in Chinese)
[11]郭鹤桐,张三元.复合镀层[M].天津:天津大学出版社,1991.Guo Hetong,Zhang Sanyuan.Composite Coating[M].Tianjin:Tianjin University Press,1991.(in Chinese).
[12]Berkh O,Bodnevas A,Zahavi J.Electrodeposited NiP-Si C composite coatings[J].Plating and Surface Finishing,1995(11):62-66.
[13]Sun K H,Hong J Y.Formation of bilayer Ni-Si C composite coatings by electrodeposition[J].Surface and Coatings Technology,1998(108):564-569.
[14]Furukawa N,Hayashi T.Factorsaffecting the formation of Ni-Al2O3and Ni-Zr O2dispersion coatings[J].Journal of the Metal Finishing Society of Japan,1977,28(10):527-533.