In-situ hydrothermal crystallization Mg(OH)2 films on magnesium alloy AZ91 and their corrosion resistance properties
In-situ hydrothermal crystallization Mg(OH)2 films on magnesium alloy AZ91 and their corrosion resistance properties
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DOI：
10.1016/j.matchemphys.2013.09.005
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发表时间：
2013-12-16
影响因子：
4.6
通讯作者：
Zhang, Milin
中科院分区：
文献类型：
--
作者：
Feng, Jing;Chen, Yan;Zhang, Milin
采用原位水热法在镁合金 AZ91 基体上制备了 Mg(OH)(2) 薄膜。 AZ91合金基体在合成过程中既充当Mg2+离子源又充当Mg(OH)(2)薄膜的支撑体。研究了pH值和水热处理时间对Mg(OH)(2)薄膜形貌和耐蚀性能的影响。所得Mg(OH)(2)薄膜均匀致密。由于原位生长过程，薄膜与基底之间的粘附力很强，这增强了它们的实际应用潜力。动电位极化测量表明，在pH 10、3 h时获得的Mg(OH)(2)薄膜在-0.7097 V时腐蚀电位增加最高，i(corr)最低，这表明它是所有获得的薄膜中提高AZ91耐腐蚀性能最有效的薄膜。 (C) 2013 Elsevier B.V. 保留所有权利。
Mg(OH)(2) films have been fabricated on magnesium alloy AZ91 substrates by an in-situ hydrothermal method. AZ91 alloy substrates act as both the source of Mg2+ ion and the support for the Mg(OH)(2) film in synthetic process. The effect of pH value and hydrothermal treatment time on the morphologies and corrosion resisting properties of Mg(OH)(2) film is studied. The obtained Mg(OH)(2) films are uniform and compact. The adhesion between the films and the substrate is strong due to the in-situ growth process, which enhances their potential for practical applications. Potentiodynamic polarization measurements showed that the Mg(OH)(2) films obtained at pH 10, 3 h exhibits the highest increase in corrosion potential at -0.7097 V and lowest i(corr), which suggests that it is the best effective film in improving the corrosion resistance of AZ91in all obtained films. (C) 2013 Elsevier B.V. All rights reserved.