工程科学学报2016，Vol.38Issue(8)：1132-1138,7.DOI:10.13374/j.issn2095-9389.2016.08.012
冷却速度对Zn--5 Al--0.1 RE--x Si合金显微组织及耐蚀性能的影响
Effect of cooling rate on the microstructure and corrosion properties of Zn--5Al--0. 1RE--xSi alloys
摘要
Abstract
The effects of cooling rate and Si on the microstructure and corrosion property of the Zn-5Al-0. 1RE alloy were studied by scanning electron microscopy-energy dispersive spectrometry, X-ray diffraction, neutral salt spray test and polarization curves. The results show that Zn-5Al-0. 1RE-xSi alloys are composed of primaryȠ-Zn phase and Ƞ-Zn+α-Al eutectic structure, and the former is uniformly distributed on the adjacent Ƞ-Zn+α-Al eutectic cells. The reduction of cooling rate and the addition of Si make the grain size increase and the boundary area per unit alloy area decrease;at the same time, the corrosion resistance is improved. The corrosion resistance of the Zn-5Al-0. 1RE-xSi alloys is dependent on their solidification structure and the relative amount of corrosion products including Zn5 ( OH) 8 Cl2·H2 O and ZnO.关键词
锌铝合金/冷却速度/微观结构/耐蚀性能/硅/热浸镀锌Key words
zinc aluminum alloys/cooling rate/microstructure/corrosion resistance/silicon/hot dip galvanizing分类
矿业与冶金引用本文复制引用
涂浩,魏大圣,周圣洁,刘亚,吴长军,苏旭平,王建华..冷却速度对Zn--5 Al--0.1 RE--x Si合金显微组织及耐蚀性能的影响[J].工程科学学报,2016,38(8):1132-1138,7.基金项目
国家自然科学基金资助项目(51271040,51201023) （51271040,51201023）
