热浸镀铝锌镀层在NaCl溶液中腐蚀电化学行为
来源期刊:有色金属科学与工程2011年第3期
论文作者:姚文俐 董速伟 陈金清 陈星斌 刘平
文章页码:13 - 17
关键词:55%Al-Zn-Si镀层; 腐蚀; 电化学方法; 氯化物溶液
Key words:55 %Al-Zn-Si coating; corrosion; electro-chemical methods; chloride solutions
摘 要:利用循环伏安、动电位极化曲线、腐蚀电位及电化学阻抗等电化学分析手段研究了热浸镀55%Al-Zn-Si及Zn镀层在3.5%NaCl腐蚀介质中的腐蚀电化学行为及腐蚀演变规律.研究表明,在腐蚀过程中,55%Al-Zn-Si镀层的耐蚀性能和腐蚀寿命要明显好于同条件下的Zn镀层,主要由于55%Al-Zn-Si镀层表面形成了致密的氧化铝保护层及Al自身的高耐腐蚀属性. 更多还原
Abstract: This paper studies the electrochemical corrosion behavior and mechanism of the commercial 55 % Al-Zn-Si and Zn coatings in 3.5 % NaCl aqueous solutions by cyclic voltammetry,polarization curves,corrosion potential and electrochemical impedance spectroscopy.The results showed that,the hot-dip 55 %Al-Zn-Si coatings exhibit better anti-corrosion performances and longer corrosion life than those of the hot-dip Zn coatings during the same long-tern immersion tests,due to the formation of compact alum.