氧化膜中四方氧化锆对Zr-Sn-Nb合金耐腐蚀性影响的研究(英文)  

Study on Influence of Tetragonal ZrO_2 in Oxide Film on Corrosion Resistance of Zr-Sn-Nb Alloy

作　　者：耿迅[1] 刘庆冬[1] 刘文庆[1] 姚美意[1] 周邦新[1] 

机构地区：[1]上海大学,上海200444

出　　处：《稀有金属材料与工程》2008年第8期1415-1418,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation (50571056);Foundation of Science and Technology Department of Shanghai (04ZR14057) ;shanghai Leading Academic Discipline Project (T0101)

摘　　要：将经过不同条件处理的Zr-Sn-Nb合金样品放在装有0.01mol/L的LiOH溶液、350℃、16.8MPa的高压釜中腐蚀,用椭圆偏振法研究氧化膜中四方氧化锆对Zr-Sn-Nb合金耐腐蚀性的影响。研究发现,经过42和190d腐蚀后,580℃/冷轧/500℃样品中的四方氧化锆比其它样品多,但是腐蚀速率却相反。说明了少量的四方氧化锆是影响Zr-Sn-Nb合金耐腐蚀性的主要因素之一,四方氧化锆的形成提高了合金的耐腐蚀性。Zr-Sn-Nb alloy specimens treated in different ways were exposed to 0.01 mol/L LiOH aqueous solution at 350℃, 16.8 MPa in autoclave. Spectroscopy Ellipsometry （S-E） was applied to investigate the effect of tetragonaI ZrO2 （t-ZrO2） in oxide film on corrosion resistance of Zr-Sn-Nb alloy. It was found that the 580 ℃/C.R/500℃ specimen corroded for 42 days and 190 days have more t-ZrO2 than other two specimens. But it is converses to the corrosion rate. It is suggested that the small amount of t-ZrO2 is a main factor to affect the corrosion resistance ability and the corrosion resistance is improved by the formation of t-ZrO2.

关 键 词：锆合金 氧化膜 耐腐蚀性 椭圆偏振法 

分 类 号：TG146.414[一般工业技术—材料科学与工程]