超声处理对汽车用Al2O3/Ni-W-Fe-P化学镀层结构和腐蚀性能的影响  

Effect of Ultrasonic Treatment on the Structure and Corrosion of AlO/Ni-W-Fe-P Coating for Car

作　　者：李明刚[1] 骞大闯[2] 安晓东 Li Minggang;Qian Dazhong;An Xiaodong(Henan Vocational College of Mechanical and Electrical Engineering,College of Automotive Engineering,Zhengzhou 451191,China;Henan Vocational College of Mechanical and Electrical Engineering,School of New Energy Vehicles,Zhengzhou 451191,China;Zhengzhou Institute of Aviation Industry Management,Department of Vehicle Engineering,Zhengzhou 451191,China)

机构地区：[1]河南机电职业学院汽车工程学院,郑州451191 [2]河南机电职业学院意昂新能源汽车学院,郑州451191 [3]郑州航空工业管理学院车辆工程系,郑州451191

出　　处：《真空科学与技术学报》2020年第10期902-906,共5页Chinese Journal of Vacuum Science and Technology

基　　金：河南省高校重点项目计划(项目编号:20A460024)。

摘　　要：分别在液压管表面制备了Ni-W-Fe-P与Al2O3/Ni-W-Fe-P颗粒两种镀层,研究超声处理与机械搅拌两种方式下镀液分散效果,分析超声处理对其结构和腐蚀性能的影响。研究结果表明:Ni-W-Fe-P镀层组织具有明显的非晶态特点,都呈现紧密相连的连续胞状分布特征。加入Al2O3颗粒后形成的镀层内产生了许多弥散态分布的细小球形颗粒,形成了致密的镀层组织。加入Al2O3颗粒后可以使镀层硬度获得大幅提升,孔隙率得到下降。经过机械搅拌与超声处理处理后得到的镀层腐蚀速率发生了明显减小,添加Al2O3颗粒对基体起到良好保护作用。超声处理Al2O3/Ni-W-Fe-P镀层进行腐蚀后许多凸起的组织结构开始消失,跟基体形成紧密结合状态。The surfaces of Q195 steel,an advanced material in chemical/auto/aerospace industries,were modified with Al2O3-doped,Ni-based W-Fe-P coatings deposited by electroless plating.The influence of the ultrasonic churning and addition of Al2O3powderto the chemical solutions on the microstructures and corrosion/erosion behavior was investigated with X-ray diffraction,scanning electron microscopy and energy dispersive spectroscopy.The results show that the Al2O3-adition and ultrasonic churning had a major impact.For instance,the amorphous Al2O3-doped Ni-W-Fe-P coatings,comprising randomly distributed Al2O3 spheres,significantly improved the corrosion/erosion resistance,increased the compactness/hardness/interfacial-adhesion and decreased the porosity and surface roughness.Moreover,ultrasonic churning outperforms mechanical churning of chemical solutions because of stronger interfacial adhesion,faster surface reaction and better protection of Q195 substrate in electroless plating.

关 键 词：Ni-W-Fe-P化学镀层 AL2O3颗粒 超声处理 微观组织 腐蚀性能 

分 类 号：TG146[一般工业技术—材料科学与工程]