|||
近年来在《Surface & Coating Technology》、《Transactions of Nonferrous Metals Society of China》和《中国有色金属学报》报道了我们有关镁合金AZ31和Mg-Li-Ca表面Ca改性的四水合磷酸锌(Zn-Ca-P)转化膜的研究。最新的研究结果《镁铝合金磷酸锌钙转化膜耐蚀性》(Corrosion resistance of calcium-modified zinc phosphate conversion coatings on magnesium-aluminium alloys)于2014年8月11日发表在《腐蚀科学》(Corrosion Science)。
(October 31, 2014前可免费下载,链接地址:http://authors.elsevier.com/a/1PhAF,FwiPIZz)
去年5月在2013海峡两岸生医材料应用研讨暨媒合会(台湾高雄)上报道了这一研究结果(请见2013海峡两岸生医材料应用研讨暨媒合会(台湾高雄)总结)。
镁合金基体(合金成分、组织)对转化膜涂层的形成、结构和耐蚀性有重要影响。为了更好地理解磷酸锌钙(Zn-Ca-P)转化膜的成膜机理,我们在挤压态AZ31板、AZ31管和AM30管表面制备了Zn-Ca-P膜。通过合金成分、组织晶粒度、表面膜形貌、粗糙度分析和耐蚀性相关性研究发现,Zn-Ca-P涂层的耐蚀性依赖于基体的成分和组织(晶粒度、金属间化合物),提出了Zn-Ca-P 涂层在AM30表面的成膜机理。
Highlights
•Zn-Ca-P coatings have been prepared on as-extruded AZ31 plates, AZ31 pipes and AM30 pipes.
•The Zn-Ca-P coatings markedly enhance the corrosion resistance.
•The coating formation is affected by microstructure and composition of the substrates.
•The proposed model elucidates the coating formation of AM30 alloy.
图1 AM30表面Zn-Ca-P 涂层的成膜机理
相关研究:
1.Rongchang Zeng*, Zidong Lan, Linghong Kong, Yuanding Huang, Hongzhi Cui. Characterization of calcium-modified zinc phosphate conversion coatings and their influences on corrosion resistance of AZ31 alloy, Surface and Coatings Technology, 205, 2011: 3347-3355.
2. R.C. Zeng*, Xin-Xin Sun, Ying-wei Song, Fen Zhang, Shuo-Qi Li, Hong-Zhi Cui, En-Hou Han, Influence of solution temperature on corrosion resistance of Zn-Ca phosphate conversion coating on biomedical Mg-Li-Ca alloys, Trans. Nonferrous Met. Soc. China, 23(11), 2013: 3293−3299.
3.曾荣昌*、兰自栋. 镀液温度对镁合金AZ31 表面锌钙系磷化膜耐蚀性的影响,中国有色金属学报,20 , 2010: 1461-1466.
Archiver|手机版|科学网 ( 京ICP备07017567号-12 )
GMT+8, 2024-11-23 21:22
Powered by ScienceNet.cn
Copyright © 2007- 中国科学报社