Fe-B合金在锌液中冲刷与腐蚀的交互作用
Erosion？？Corrosion Interaction on Fe？？B Alloy in Flowing Liquid Zinc

为研究锌液对热镀锌设备关键部件的冲刷与腐蚀交互作用,设计超强耐锌液腐蚀材料,利用自主研制的锌液腐蚀磨损试验机进行了相应的实验,并采用扫描电镜(SEM)观察了冲刷？哺？蚀试样的界面形貌,以研究Fe？？3？？5B合金在流动锌液中的冲刷与腐蚀交互作用规律。结果表明:流动锌液造成的总冲蚀速率和纯腐蚀率随腐蚀时间延长而下降。在相同时间下,总冲蚀速率远高于纯腐蚀速率,而纯冲刷速率则变化较小;流动锌液的冲刷加速了界面产物的移除,同时腐蚀粗化了界面并强烈促进冲刷,使冲刷与腐蚀产生交互作用;在冲刷？哺？蚀初期,剧烈的腐蚀促进冲刷,但随冲刷？哺？蚀时间的延长,界面前沿的Fe2B对流动锌液的阻挡导致腐蚀强度下降,使交互作用减弱。
The interaction of erosion and corrosion on Fe？？B alloy in flowing liquid zinc is investigated by rotating disk technique in order to design super corrosion resistant material. The results indicate that both the total erosion？？corrosion rate and the pure corrosion rate decline with the test time. The total erosion？？corrosion rate is far greater than the pure corrosion rate within same time, while the pure erosion rate changes slightly with test time. The liquid zinc’s erosion action can accelerate the removal of corrosion products, and in turn the zinc’s corrosion action facilitates erosion by forming loose corrosion layer, thus leading to a strong interaction of erosion and corrosion on the alloy in liquid zinc. The result also indicates that the early violent corrosion facilitates erosion. With the increase of erosion time, the interfacial corrosion becomes weak because of the barrier effect of Fe2B skeleton on liquid zinc diffusion, thus leading to a subdued interaction