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A study of Corrosion Protection of Aluminum Metal by Tetraethoxysilane Plasma Polymerized Coatings -Influence of Aluminum Surface Pretreatments-
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作者 Yoshihiro Motnose Tatsuya Yabuki 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第05B期1325-1328,共4页
The corrosion-protective performance of plasma-polymerized (PP) coatings on pretreated aluminum substrates has been investigated by cathodic polarization curve measurement. The surface composition and electronic prope... The corrosion-protective performance of plasma-polymerized (PP) coatings on pretreated aluminum substrates has been investigated by cathodic polarization curve measurement. The surface composition and electronic properties of the pretreated and PP film coated metal surfaces were also characterized by XPS and the temperature-programmed photoelectron emission (TPPE). A PP coating was prepared on the pretreated surfaces by plasma polymerization of a mixture of tetraethoxysilane (TEOS) monomer vapor and oxygen using a 13.56MHz radiofrequency generator. The polarization curve of PP film coated samples was measured in NaCl aqueous solution. The weight loss rate calculated from the value of the corrosion current of the curve was used to estimate the protective performance of the PP film coated samples. Argon plasma treatment of the metal surface gave much better corrosion-protective performance than pretreatments such as oxidation by heating in air and diamond scratching. The XPS analysis indicated that the silicon oxide assigned to SiO2 was formed on the PP film coated surface. The TPPE analysis revealed that the electron emission characteristics for the metal surfaces pretreated only were strongly influenced by the pretreatments, while all the PP film coated samples exhibited nearly the same electron emission trend with a much decreased intensity. 展开更多
关键词 防腐蚀 等离子聚合 四乙氧基甲硅烷 TPPE 极化曲线
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木材表面涂玻璃层方法
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作者 范恩荣 《企业科技与发展》 1996年第12期15-15,共1页
为了改善木材的装饰性能及提高木材硬度和强度,美国华盛顿大学研制成了用溶胶—凝胶法新工艺对木材表面进行玻璃化处理的方法。溶胶—凝胶工艺是现代材料科技领域一项新成就,用它代替传统烧成和熔融工艺可以制备各种新型的材料,用溶胶... 为了改善木材的装饰性能及提高木材硬度和强度,美国华盛顿大学研制成了用溶胶—凝胶法新工艺对木材表面进行玻璃化处理的方法。溶胶—凝胶工艺是现代材料科技领域一项新成就,用它代替传统烧成和熔融工艺可以制备各种新型的材料,用溶胶—凝胶工艺还可以在各种材料(例如金属、陶瓷、玻璃、木材等)上涂膜和涂层。本文介绍是如何在木材表面进行涂玻璃层。 众所周知,普通硅酸盐玻璃主要成份是二氧化硅,尤其是石英玻璃,二氧化硅含量占98%—99%,木材表面涂玻璃层主要是涂石英玻璃。石英玻璃具有一系列的优良性质:高的热稳定性、高的强度、高的熔化温度和软化温度,以及高的耐腐蚀性和耐磨性等。 展开更多
关键词 木材表面 四乙氧基甲硅烷 玻璃层 石英玻璃 玻璃化 木材硬度 溶胶—凝胶工艺 溶胶一凝胶法 酸盐玻璃 溶胶—凝胶法
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Preparation and properties of organic-inorganic modified SiO_2 thin films 被引量:1
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作者 赵贤辉 李长虹 王海 《Journal of Central South University》 SCIE EI CAS 2013年第3期608-614,共7页
Polydimethylsiloxane (PDMS), tetraethoxysilane (TEOS), ethyl alcohol (EtOH) and deionized water were main raw materials to prepare silicone-modified hybrid thin films using sol-gel method. The effect of the cont... Polydimethylsiloxane (PDMS), tetraethoxysilane (TEOS), ethyl alcohol (EtOH) and deionized water were main raw materials to prepare silicone-modified hybrid thin films using sol-gel method. The effect of the contents of H2O and PDMS on thin films was studied. When the volume ratio of H20 to TEOS is 0.5, the optimum quality of thin films is obtained. And the gelation time is affected slightly by H20 content. Uniform thin films are obtained when the volume ratio of PDMS to TEOS is 0.2. Yet, the sol would be inactive in 6 d. Various properties of thin films were studied, including hardness, adhesive quality, hydrophobic property, corrosion protection property, and abrasion resistance. Test results show that the pencil hardness is generally 3-6 H, and adhesive quality achieves the highest standard of 0. When the sintering temperature is below 400℃, the contact angle is about 95° and hydrophobic films are obtained. The abrasion resistance of thin films is better than that of aluminum alloy when the sintering temperature is higher than 300℃. And the excellent corrosion protective effect is obtained by single-layer coating when the sintering temperature is higher than 400℃. 展开更多
关键词 sol-gel method hybrid thin film HARDNESS adhesive quality hydrophobic property CORROSION
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