Methods and Research Progress in Improving the Characteristic Mesh Structure of Hard Chromium Plating Layer

Abstract

Due to its high hardness and low friction coefficient, hard chromium plating layer is commonly utilized to enhance the wear resistance of mechanical components, thereby prolonging their service life. However, the unique mesh structure of these layers detrimentally impacts air tightness and corrosion resistance, limiting their application scope. In this paper, methodology and current research for improving this mesh structure were comprehensively analyzed and summarized. The mesh structure of the chromium layer, which was affected by factors such as pretreatment, composition of electroplating solution, plating parameters, additives and flexible technology, was reviewed. The application of post-processing methods such as rolling, diamond ultra precision rolling and hole sealing, to improve the mesh structure in solving practical engineering problems was reviewed. The research progress on the preparation of reticulated composite chromium layers using co-deposition technology and the introduction of laser surface texture technology for the design of mesh microstructure of chromium plating layers was reviewed.

Keywords

• chromium plating|mesh|microstructure|composite co-deposition|laser surface texture