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利用超声空化设备,分别在自来水和去离子水介质中针对Q235钢进行表面振动空蚀处理.利用扫描电子显微镜、激光共聚集显微镜、拉曼光谱仪和透射电子显微镜对自来水介质中产生的空蚀坑及坑缘形貌、结构进行了分析.结果表明:Q235钢空蚀呈现典型的彩虹环结构,该结构是由δ-Fe OOH组成的具有不同叠加厚度的纳米薄片.纳米结构生成机制为空化作用引起的空蚀产物喷发堆积.其中,较之去离子水介质,自来水介质中产生的纳米薄片厚度和数量要大得多,表明离子对羟基氧化铁纳米结构的形成有促进作用.
The surface cavitation erosion of Q235 steel was carried out in tap water and deionized water respectively by using ultrasonic cavitation equipment.The cavitation produced in tap water medium by scanning electron microscope, laser confocal microscope, Raman spectroscopy and transmission electron microscopy The results show that the cavitation of Q235 steel shows a typical rainbow-ring structure, which is a nano-flake composed of δ-Fe OOH with different superposition thickness.The mechanism of nanostructure formation is empty In contrast, the thickness and amount of nanoflakes produced in tap water media is much greater than that of deionized water media, suggesting that the formation of iron oxyhydroxide nanostructures is facilitated by the ionization.