ULTRA-ALKALINE CORROSION RESISTANCE COATINGS VIA ELECTROPHORETIC SOL-GEL PROCESSING

通过电泳溶胶-凝胶工艺制备超碱性耐腐蚀涂层

• 批准号: 09650774
• 负责人: HIRAI Shinji
• 金额: $ 2.18万
• 依托单位: DEPARTMENT OF MATERIALS SCIENCE AND ENGINEERING MURORAN INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650774/
• 关键词: Sol-gel Process; Alkaline Corrosion Resistance; Aluminum anodic oxide film; Zirconium Oxide; UV-irradiation; Electrophoretic deposition; Thick coatings; Ambient Temperature; コーティングプロセス; Sol-gel Process; Alkaline Corrosion Resistance; Aluminum anodic oxide film; Zirconium Oxide; UV-irradiation; Electrophoretic deposition; Thick coatings; Ambient Temperature; コーティングプロセス

Instead of conventional sol-gel process in which the heat treatment is performed for forming dense composite film after the dipping-withdrawing of substrate into the sol solution, a new sol-gel process incorporated with an ultraviolet(UV) -irradiation at an ambient temperature have been attempted to improve the alkaline corrosion resistance of aluminum. The sol-gel film prepared by UV -irradiation at an ambient temperature indicated the alkaline corrosion resistance superior in the range of 2.4 times to 2.6 times to that of the conventional composite film heated at 573K.The improvement of alkaline corrosion resistance was responsible for the densification of coating layer due to the elimination of residual organics induced by photo-exixitation. The high alkaline corrosion resistance of the irradiated film may be attributed to the formation of dense coating layer and the self repairing action caused by a repetition for preparation and dissolution of the reactant in the penetrating path of NaOH solution into the composite film. Next, the preparation of thick coating film by the sol-gel electrophoretic deposition method have been investigated. The thickness of coating layer was observed to increased with increasing applied voltage and time. The coating layer produced were thicker and more dense than those obtained in dip-coating.

与代替传统的溶胶 - 凝胶过程，在将基板浸入底物中后，将热处理进行热处理以形成密集的复合膜，而是在环境温度下与紫外线（UV） - iRrAdiation一起掺入的新的SOL-GEL工艺已尝试改善铝的碱性耐铝的耐氧腐蚀性。紫外线在环境温度下制备的溶胶 - 凝胶膜在2.4倍至2.6倍的范围内表明，碱性耐药性高于573K加热的常规复合膜的耐药性。碱性腐蚀耐药性的改善负责导致造影层的密度造成的涂层层，这是由于剩余有机化所导致的造影有机化所引起的，造成了造影有机化。辐照膜的高碱性腐蚀耐药性可能归因于密集涂层的形成以及由反应物在NaOH溶液中渗透到复合膜中的反应物的重复和溶解引起的自修理动作。接下来，已经研究了通过Sol-Gel电泳沉积法制备厚涂层膜。观察到涂料层的厚度随着施加的电压和时间的增加而增加。产生的涂层比浸入涂层中获得的涂层更厚，更密集。