Brush-electroplating technology for nanop-articles was applied to repair the rabbet of a certain type of engine compressor blade subjected to wear. Brush-electroplated nanopar-ticle-containing composite coatings with reliable performance were obtained by properly controEing the brush-plating parameters. The bonding strength, microhardness, the amount of hydrogen permeability, wear resistance and contact fatigue life of the com-posite coatings were measured. Results show that brush-electro-plated nano-Al2O3/Ni coating, nano-SiO2/Ni coating and quick nickel coating all have satisfactory performance. Compared with brush-plated quick Ni coating, the microhardness of nano-Al2O3/Ni coating was increased by 25% , and its amount of hydrogen permeability was reduced by 47%. The wear resistance of nano-Al2O3/Ni coating was 2.5 times of that of quick Ni coat-ing, and its contact fatigue life was also increased. Similarly, the microhardness of nano-SiO2/Ni coating was increased by 12%, and its amount of hydrogen permeability was reduced by 41 % as compared with quick Ni coating, while its wear resistance was 2.2 times of that of the quick Ni coating, accompanied by in-creased contact fatigue life as well. At the same time, the pro-cessing efficiency of brush-electroplating for nanoparticles was al-most two times of that for conventional brush-plating quick Ni. The blade repaired by using brush-electroplating of composite nanoparticles had passed long-term test assessment, showing sat-isfactory performance in engineering applications.

介绍了超声波清洗的原理、特点、设备组成及清洗参数的选择,阐述了超声波清洗的主要用途及其在航空维修中的应用。