以溶膠-凝膠程序製備無機複合膜於金屬基材之電化學和表面特性分析

The Electrochemistry of Surface ANalysis of Inorganic Coatings Prepared by Sol-Gel Process on the Metal Surface

劉偉仁(Wei-Reng Liou)

指導教授 ： 鍾財王

中原大學/工學院/化學工程研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100178

摘要

為了增加金屬基材之耐腐蝕特性，本實驗以溶膠-凝膠法製備TiO2/SiO2複合無機被覆膜並以旋轉塗佈方式被覆於不銹鋼304基材表面。研究中以TGA、DSC、FT-IR、XRD等分析儀器探討溶膠-凝膠程序之反應情形和不同燒結溫度之樣品結晶性分析；另以偏光顯微鏡和掃描式電子顯微鏡觀察基材表面被覆膜之外觀、結構、覆膜品質之分析；在耐腐蝕性能之測試，以電化學之極化曲線對於不同製備條件之無機複合膜進行測試。研究結果發現當燒結溫度增加，促使聚縮合反應的進行，在IR圖譜可觀測到Si-OH減少，Si-O-Ti增加的趨勢；在XRD中可得知被覆膜經高溫燒結後，無機陶瓷粉末結晶性增加，藉此結晶性結構得以保護基材；在本實驗之操作條件下，被覆膜組成Ti/Si = 1、燒結溫度630℃、燒結時間3h之條件下可製備出耐電化學腐蝕較佳之無機被覆薄膜，所量測之電流密度為0.00039 mA/cm2，而未經被覆膜保護之不銹鋼基材其電流密度為0.023 mA/cm2。由本實驗結果證實以TiO2/SiO2當作被覆膜被覆於不銹鋼304L基材確實對其耐腐蝕特性有所提昇。

關鍵字

電化學 ； 被覆 ； 腐蝕 ； 溶膠-凝膠法

並列摘要

In order to improve the corrosion resistance of metal substrate, the sol-gel process is used to prepare a multi-component inorganic coating of TiO2-SiO2 on the stainless steel 304 substrate by using spin coating. In the experiment, the reaction mechanism of sol-gel process and the crystallizability of samples prepared at different temperatures are analyzed by TGA, DSC, FT-IR, and XRD. The appearance, structure, and the quality of the coating film are observed by Optical Microscope and SEM. In the corrosion test, some parameters, such as the TiO2 concentration, sintering temperature and sintering time are discussed by polarization method. Under the operating conditions of this study, the better anti-corrosion performance of the films are prepared at Ti/Si = 1, sintering temperature = 630℃and sintering time = 3h. And the current density of the coated substrate is 0.00039mA/cm better than that of uncoated (0.023mA/cm). Results indicated that a stainless steel 316L plate coated with TiO2-SiO2 films characterized a better corrosion on stainless steel.

並列關鍵字

Electrochemistry ； Coating ； Corrosion ； Sol-gel process

參考文獻

Atik M., Lima-Neto P. De, Aegerter M. A. and Avaca L.A., “Sol-gel TiO2-SiO2 films as protective coatings against corrosion of 316L stainless in H2SO4 solutions”, Journal of Applied Electrochemistry, 1995, 125, iss 2, 142-148.

Atik M., Lima-Neto P. de, Avaca L.A. and Aegerter M. A., “Sol-gel thin films for corrosion protection”, Ceramics International 21, 1995, 403-406.

Atik M. and Aegerter M.A., “Corrosion resistance sol-gel ZrO2 coatings on stainless steel”, Journal of Non-Crystalline Solids, 147&148, 1992, 813-819.

Atik M. and Zarzycki J., “Protective TiO2-SiO2 coatings on stainless sheets prepared by dip-coating”, Journal of Materials Science Letters, 13, 1994, 1301-1304.

Conde A.R. Di G., Puerta M., Ruiz H. and Olivares J. Lira, “Thick aluminosilicate coatings on carbon steel via sol-gel”, Journal of Non-Crystalline Solids, 147&148, 1992, 467-473.