Morphology and Properties of Dip-coated Silicon Dioxide Ceramic Films
ZHOU Qi1, WAN Wen-lu1, ZHANG Chun-li2, HE Chun-lin3
1. School of Environment and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China;
2. Science School, Tibet University, Lhasa 850000, China;
3. Liaoning Provincial Key Laboratory of Advanced Materials, Shenyang University, Shenyang 110044, China
Abstract：A dipping technology was used to prepare thin silica ceramic film on a composite nickel-plated A3 iron substrate.The microstructures of ceramic membrane was observed by SEM.The corrosion resistance properties and the wear-resistance properties were performed by electronical impedance spectroscopy and the flat surface abrasion machine,respectively.The results show that the surface morphology of silicon oxide ceramic coating sintered at 500℃ is similar to micro-crack chromium and the surface morphology of those sintered at 400℃ is similar to micro-porous chrome.Ceramic coatings are amorphous SiO2 after sintered at 400℃ and 500℃. The corrosion process of silica sol gel film with high impedance in 3.5% (mass fraction) NaCl solution is controlled by diffusion procedure, which can obviously inhibit the corrosion of nickel deposit on A3 iron substrate, and that with low impedance is controlled by electrochemical step. The wear-resistance of films after dip-coating is significantly better than that of eletroplating nickel. Silica sol-gel coating can reduce its porosity. The wear-resistance of composited plating nickel on iron substrate are improved by the silica sol-gel coatings.
 SANDRINE D, GEORGES M, RICARDO P N, et al. Silica-based coating for corrosion protection of electrogalvanized steel[J].Surface and Coatings Technology, 2005,194(2-3):363-371.
 MAKOTO T. Crack formation, exfoliation, and ridge formation in 500℃ annealed sol-gel silica coating on stainless steel SUS304:Part I. Microscopic observations and elemental analyses[J]. Ceramics International, 2009, 35(5):1731-1746.
 MAKOTO T. Crack formation, exfoliation, and ridge formation in 500℃ annealed sol-gel Silica coatings on stainless steel SUS304: Part II spectroscopic and mechanical analyses and insights into mechanisms coating characteristics[J]. Ceramics International, 2009, 35(5): 1747-1755.
 ABDEL S H,BUTT D P. Environmentally compliant silica conversion coatings prepared by sol-gel method for aluminum alloys[J].Surface and Coatings Technology, 2006,201(1-2): 401-407.
 FARZAD M, SABOUR R A, SHAHRABI T. Effect of heat treatment on corrosion properties of mixed sol gel silica-titania (7-3) coating[J]. Journal of Non-Crystalline Solids,2011,357(3):1141-1146.
 IQBAL A S, TAKESHI F, MASAHIDE S, et al. Control of the photocatalytic activity of TiO2 nanoparticles by silica coating with polydiethoxysiloxane[J]. Dyes and Pigments, 2008, 76(3):754-759.
 HASSANNEJAD H, SHAHRABI T,MALEKMOHAMMADI F. Effect of cerium doping on corrosion resistance of amorphous silica-titanium sol-gel coating[J]. Current Applied Physics, 2010, 10 (4):1022-1028.
 朱立群,丁学谊,刘孟兰,等.化学镀Ni-P合金层表面涂覆溶胶-凝胶的研究[J].中国表面工程, 1999, (1):29-31.ZHU Li-qun, DING Xue-yi, LIU Meng-lan,et al. A study on Ni-P electroless plating layer with sol-gel coating[J]. China Surface Engineering, 1999, (1):29-31.
 朱立群,刘慧丛,吴俊.化学镀镍层封孔新工艺的研究[J].电镀与涂饰,2002,21(3):29-33.ZHU Li-qun, LIU Hui-cong, WU Jun. Study of a new process for blocking of electroless nickel deposits[J]. Electroplating & Finishing, 2002,21(3):29-33.
 侯峰,徐宏,关凯书,等. 化学镀镍磷合金表面涂覆SiO2溶胶-凝胶封孔技术研究[J]. 表面技术, 2004, 33(2):26-28. HOU Feng, XU Hong, GUAN Kai-shu, et al. Research on pore sealing of electroless Ni-P plating alloy covered with SiO2 sol-gel[J]. Surface Technology,2004, 33 (2):26-28.
 赵秦生,李中军,刘长让. 溶胶-凝胶法制备多孔SiO2超细粉体[J]. 中南工业大学学报, 1998,29(2):131-134. ZHAO Qin-sheng, LI Zhong-jun, LIU Chang-rang. Preparation of porous SiO2 ultrafine powders by sol-gel process[J]. Journal of Central South University of Technology,1998,29(2):131-134.
 杨儒,张广延,李敏,等. 超临界干燥制备纳米SiO2粉体及其性质[J]. 硅酸盐学报,2005, 33(3):281-286. YANG Ru, ZHANG Guang-yan, LI Min, et al. Preparation and properties of nano-SiO2 powder by supercritical drying[J]. Journal of the Chinese Ceramic Society, 2005, 33(3):281-286.