Zirconium Oxide Coating on Anodized Aluminum by the Sol‐Gel Process Combined with Ultraviolet Irradiation at Ambient Temperature
Zirconium Oxide Coating on Anodized Aluminum by the Sol‐Gel Process Combined with Ultraviolet Irradiation at Ambient Temperature
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常温下溶胶-凝胶工艺结合紫外线照射在阳极氧化铝上形成氧化锆涂层
DOI：
10.1111/j.1151-2916.1999.tb02033.x
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
A. Nukui
中科院分区：
文献类型：
--
作者：
S. Hirai;K. Shimakage;Motoi Sekiguchi;K. Wada;A. Nukui
传统的溶胶-凝胶工艺中，在将基材浸入溶胶中/从溶胶中取出后，使用热处理来形成致密的复合膜，人们尝试了一种在环境温度下结合紫外线（UV）照射的新溶胶-凝胶工艺来提高铝的耐碱性腐蚀性能。在环境温度下通过紫外线照射制备的溶胶-凝胶薄膜表明，其耐碱性腐蚀性能优于在573 K下加热的传统复合薄膜的2.4倍至2.6倍。由于光激发引起的残留有机物的消除而导致涂层致密化，这是耐碱性腐蚀性能提高的原因。辐照膜的高耐碱腐蚀性可能归因于致密涂层的形成以及NaOH溶液渗透到复合膜中反应物的重复制备和溶解而引起的自修复作用。
Instead of the conventional sol-gel process in which heat treatment is used to form a dense composite film after dipping/withdrawing a substrate into/from the sol, a new sol-gel process incorporating ultraviolet (UV) irradiation at ambient temperature has been attempted to improve the alkaline corrosion resistance of aluminum. A sol-gel film prepared by UV irradiation at ambient temperature indicated that alkaline corrosion resistance is superior in the range of 2.4 times to 2.6 times that of the conventional composite film heated at 573 K. The densification of the coating layer due to the elimination of residual organics induced by photoexcitation was responsible for the improvement in alkaline corrosion resistance. The high alkaline corrosion resistance of the irradiated film may be attributed to the formation of a dense coating layer and the self-repairing action caused by repetition for preparation and dissolution of the reactant in the penetrating path of NaOH solution into the composite film.