以溶膠-凝膠程序製備無機複合膜之抗高溫氧化及防蝕性質研究

Investigation of the Sol-Gel Inorganic Films for Oxidation Resistance and Corrosion Protection

楊淑梅(Shu-Mei Yang)

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/cycu200100254

摘要

本研究主要是利用溶膠-凝膠程序以浸漬方式製備TiO2-SiO2無機複合膜，起始溶液為Ti(OC2H5)4及Si(OC2H5)4（TEOS）之金屬烷氧化物。藉由改變Ti(OC2H5)4的添加量，以製備不同組成的被覆溶液。經由DSC、TGA與FTIR分析以了解不同溫度的溶凝膠之熱行為及官能基消長情形，並藉由SEM觀察被覆膜外觀特性與均質程度之差異。由高溫氧化測試，發現TiO2- SiO2膜確實具有良好的抗氧化性，而未被覆基材經XRD分析發現，會在基材表面產生Cr2O3 和Fe2O3 的氧化物。在硫酸腐蝕測試中發現，被覆膜的抗腐蝕性會因為其製備條件不同而有所差異，如不同組成的TiO2- SiO2膜、不同燒結溫度及時間。藉由不同操作條件下所製備之被覆基材的腐蝕測試後，發現當TiO2/SiO2莫耳比為0.55，於750℃，3hr燒結所製備之被覆膜具有最佳的抗腐蝕性。

關鍵字

二氧化矽 ； 二氧化鈦 ； 氧化 ； 腐蝕 ； 溶膠-凝膠程

並列摘要

The TiO2-SiO2 films were prepared on a stainless steel by dip- coating from the titania and silica alkoxide solutions. The different coating solutions were prepared by changing the amount of Ti(OC2H5) 4 . To determine the thermal properties and mechanism of the sol-gel process at different temperatures, DSC, TGA and FTIR were used. The coating surface was analized by SEM to determine the features and homogeneity of the films. After the high temperature oxidation, the TiO2-SiO2 films show good oxidation resistance. However, the Cr2O3 and Fe2O3 were formed on the surface of the uncoated samples. The corrosion resistance of the films depend on different composes, sintered temperatures and times was observed in the corrosion tests. Under the operating conditions of this study, the better corrosion resistance film was prepared at TiO2/SiO2 for 0.55 , sintered temperature at 750℃for 3h. The TiO2-SiO2 films coated on stainless steel 304 result in a good resistant oxidation or corrosion.

並列關鍵字

TiO2 ； SiO2 ； corrosion ； oxiation ； sol-gel process

參考文獻

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