Bi对锌液与X80钢表面润湿性的影响  

Effect of Bi on surface wettability of molten zinc and X80 steel

作　　者：李杭州 彭浩平[1,2,3] 许守武 邓嵩[1] 涂浩[2,3] 雷云 苏旭平[2,3] Li Hangzhou;Peng Haoping;Xu Shouwu;Deng Song;Tu Hao;Lei Yun;Su Xuping(Jiangsu Key Laboratory of Oil&Gas Storage and Transportation Technology,Changzhou University,Changzhou Jiangsu 213164,China;Jiangsu Key Laboratory of Material Surface Science and Technology,Changzhou University,Changzhou Jiangsu 213164,China;Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou University,Changzhou Jiangsu 213164,China)

机构地区：[1]常州大学江苏省油气储运技术重点实验室,江苏常州213164 [2]常州大学江苏省材料表面科学与技术重点实验室,江苏常州213164 [3]常州大学江苏省光伏科学与工程协同创新中心,江苏常州213164

出　　处：《金属热处理》2023年第2期23-29,共7页Heat Treatment of Metals

基　　金：国家自然科学基金(51971039,51671037);江苏省高等学校自然科学研究项目(19KJA530001)。

摘　　要：通过改良静滴法研究Zn-xBi(x=0.5,1.0,1.5,2.0)合金熔体在450℃下与不同基板的润湿行为,对润湿反应之后的表面张力进行计算,并使用扫描电镜能谱仪(SEM-EDS)分析润湿试验后的试样表面及截面的微观形貌和组织结构。结果表明,在450℃下,Zn-Bi合金表面张力随Bi含量增加呈现先减小再增大的规律。Zn-1.0Bi合金熔体与X80钢的接触角最小,表明添加1.0%Bi(质量分数)后的锌液润湿性最好。Zn-Bi合金熔体中Bi的含量对界面反应强度和界面结构产生影响,进而减小表面张力和接触角。润湿初期Bi元素的快速吸附降低锌液表面张力,使接触角减小。中期由界面反应强度控制,此时形成前驱膜且其促进锌合金熔体在钢基板的流动,从而改善润湿性。Wetting behavior of Zn-xBi alloy melts(x=0.5, 1.0, 1.5, 2.0) with different substrates at 450 ℃ was studied by improved sessile drop method, and the surface tensions after wetting reaction were calculated. The morphology and structure of the surface and cross-section of the specimens after the wetting reaction were analyzed by means of scanning electron microscope-energy dispersive spectrometer(SEM-EDS). The results show that the surface tension of Zn-Bi alloy melts at 450 ℃ decreases first and then increases with the increase of Bi content. The contact angle between the Zn-1.0Bi alloy melt and X80 steel is the smallest, indicating that the wettability of molten zinc is the best after adding 1.0%Bi(mass fraction). The content of Bi in the Zn-Bi alloy melt affects the interfacial reaction intensity and interface structure, thereby reducing the surface tension and contact angle. The rapid adsorption of Bi element at the initial stage of wetting reduces the surface tension of molten zinc and reduces the contact angle. In the middle stage, it is controlled by the interfacial reaction intensity, which forms a precursor film and promotes the flow of zinc alloy melt on the steel substrate, thereby improving the wettability.

关 键 词：X80钢 热浸镀锌 BI 表面张力 润湿性 前驱膜 

分 类 号：TG172[金属学及工艺—金属表面处理]