机械镀锌中超声功率对镀层耐腐蚀性能的影响

目的探究超声波功率对镀层耐腐蚀性的影响规律。方法将超声波功率分为50,70,90,110W 4个等级,利用湿法超声机械镀锌设备制备4种镀层。用多功能扫描电子显微镜观察镀锌层的微观表面形貌,并分析镀锌层厚度,测试镀锌层的耐腐蚀性能以及镀层与基体的附着强度。结果功率为50W时获得的镀层厚度最大,表面质量、耐腐蚀性能最差;功率为110W时获得镀层表面质量、耐腐蚀性能最好。结论随功率的增大,镀层表面质量明显提高,镀层耐腐蚀性有逐渐增加的趋势。

Effect of Ultrasonic Power in Mechanical Galvanizing on the Corrosion Resistance of the Coating

Objective To explore the influencing law of the ultrasonic power on the corrosion resistance of the coating. Methods Under the four levels of ultrasonic power(50, 70, 90, 110 W),four kinds of mechanical zinc-coatings were prepared by Wet ultrasound mechanical galvanizing equipment. The surface topography of the coatings was observed and studied by SEM. The coatings thickness was measured, the corrosion resistance was determined and the bonding strength between the coating and the substrate was studied. Results When the ultrasonic power was 50 W, the corrosion resistance and surface quality of the zinc-coating were worse than those of others. While the corrosion resistance and surface quality of the zinc-coating were the best when the ultrasonic power was 110 W. Conclusion The surface quality of the coating was significantly improved and the corrosion resistance of the coating showed an increasing trend with increasing power.