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首页> 外文期刊>Journal of Materials Engineering and Performance >In Situ Apparatus to Study Gas–Metal Reactions and Wettability at High Temperatures for Hot-Dip Galvanizing Applications
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In Situ Apparatus to Study Gas–Metal Reactions and Wettability at High Temperatures for Hot-Dip Galvanizing Applications

机译：原位设备在高温下研究气金属反应和润湿性，用于热浸镀锌应用

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摘要

The understanding of gas–metal reactions and related surface wettability at high temperatures is often limited due to the lack of in situ surface characterization. Ex situ transfers at low temperature between annealing furnace, wettability device, and analytical tools induce noticeable changes of surface composition distinct from the reality of the phenomena.Therefore, a high temperature wettability device was designed in order to allow in situ sample surface characterization by x-rays photoelectron spectroscopy after gas/metal and liquid metal/solid metal surface reactions. Such airless characterization rules out any contamination and oxidation of surfaces and reveals their real composition after heat treatment and chemical reaction. The device consists of two connected reactors, respectively, dedicated to annealing treatments and wettability measurements. Heat treatments are performed in an infrared lamp furnace in a well-controlled atmosphere conditions designed to reproduce gas–metal reactions occurring during the industrial recrystallization annealing of steels. Wetting experiments are carried out in dispensed drop configuration with the precise control of the deposited droplets kinetic energies. The spreading of drops is followed by a high-speed CCD video camera at 500-2000 frames/s in order to reach information at very low contact time. First trials have started to simulate phenomena occurring during recrystallization annealing and hot-dip galvanizing on polished pure Fe and FeAl8?wt.% samples. The results demonstrate real surface chemistry of steel samples after annealing when they are put in contact with liquid zinc alloy bath during hot-dip galvanizing. The wetting results are compared to literature data and coupled with the characterization of interfacial layers by FEG-Auger. It is fair to conclude that the results show the real interest of such in situ experimental setup for interfacial chemistry studies.
机译：由于缺乏原位表面表征，在高温下对气金属反应和相关表面润湿性的理解通常受到限制。在退火炉，润湿性装置和分析工具之间的低温下的原位转移，以及分析工具的显着变化与现实现实的表面组成不同。因此，设计了高温润湿性装置，以便允许X原位样本表面表征 - 燃气/金属和液态金属/固体金属表面反应后的光电子光谱。这些无气特性规定了表面的任何污染和氧化，并在热处理和化学反应后揭示了它们的真实组合物。该装置分别由两个连接的反应器组成，专用于退火处理和润湿性测量。在良好控制的气氛条件下，在红外灯炉中进行热处理，该气氛条件旨在再现在钢的工业重结晶退火期间发生的气体金属反应。在分配的下降配置中进行润湿实验，其精确控制沉积的液滴动力学。下降的扩展之后是500-2000帧/秒的高速CCD摄像机，以便在非常低的接触时间内达到信息。第一次试验已经开始模拟在重结晶退火和抛光纯FE和FEAL8的热浸镀锌期间发生的现象。％样品。结果表明，在热浸镀锌期间与液态锌合金浴液接触后退火后钢样品的真实表面化学。将润湿结果与文献数据进行比较，并通过Feg-uper结合界面层的表征。结论结果表明，该结果对界面化学研究的原位实验性能进行了真正的兴趣。

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