In this study, Fe-based amorphous coatings were prepared by atmospheric plasma spraying (APS). Then, the coatings were sealed by aluminum phosphate. The phase composition, microstructure, corrosion, and wear resistance of the coatings were investigated. The results indicated that the sealant was penetrated into the coating effectively with the combination of ultrasonic vibration and vacuum heat treatment, which made the air escape from pores and micro-cracks in the coating as much as possible. The sealing treatment could block the diffusion path of the electrolyte through pores to the interior of the coatings. Therefore, the corrosion resistance of the coating was significantly enhanced with a lower corrosion current density and passive current density. Moreover, wear of the coating was mainly caused by delamination. The cracks initiation and propagation were suppressed by the sealing treatment due to the reduction of pores and micro-cracks in the coating. Thus, the delamination of the coatings was relieved and their wear resistance was also improved.

在这项研究中，通过大气等离子喷涂 (APS) 制备了铁基非晶涂层。然后，用磷酸铝密封涂层。研究了涂层的相组成、显微组织、腐蚀和耐磨性。结果表明，超声波振动和真空热处理相结合，使密封剂有效渗透到涂层中，使空气尽可能地从涂层中的孔隙和微裂纹中逸出。密封处理可以阻断电解液通过孔隙到涂层内部的扩散路径。因此，随着腐蚀电流密度和钝化电流密度的降低，涂层的耐腐蚀性能显着提高。此外，涂层的磨损主要是由分层引起的。由于涂层中孔隙和微裂纹的减少，密封处理抑制了裂纹的萌生和扩展。因此，涂层的分层得到缓解，耐磨性也得到提高。