Centrifugal Disc Polishing Machine Supplier Introduces What Is Electrochemical Polishing

Polishing refers to the processing method of reducing the surface roughness of a workpiece by mechanical, chemical or electrochemical action to obtain a bright and smooth surface. Polishing does not improve the dimensional accuracy or geometric accuracy of the workpiece, but rather for the purpose of obtaining a smooth surface or specular gloss, and sometimes to eliminate gloss.During mechanical polishing, the high-speed rotating polishing wheel (circumferential speed of 20 m / sec or more) is pressed against the workpiece, so that the abrasive produces rolling and micro-cutting on the surface of the workpiece, thereby obtaining a bright processed surface, and the surface roughness is generally Ra0. 63 to 0.01 μm; when a non-greasy matting finish is used, the shiny surface can be matted to improve the appearance. When mass producing bearing steel balls, the method of barrel polishing is often used.Chemical polishing is the smoothing of the metal surface by regular dissolution. In the chemical polishing process, the passivation oxide film and the oxide film are continuously formed on the surface of the steel parts, and the former is stronger than the latter. Due to the microscopic inconsistency of the surface of the part, the microscopic convex portion of the surface is preferentially dissolved, and the dissolution rate is greater than the dissolution rate of the concave portion; and the dissolution of the film and the formation of the film are always performed simultaneously, but the rate is different, resulting in the surface of the steel part. The roughness is leveled to obtain a smooth, shiny surface. Polishing can fill surface pores, scratches and other surface defects, thereby increasing fatigue resistance and corrosion resistance.Electrochemical polishing is also called electropolishing. The electropolishing is to use the workpiece to be thrown as the anode and the insoluble metal as the cathode. The two poles are simultaneously immersed in the electrolytic cell, and the selective anode is dissolved by the direct current, so that the surface brightness of the workpiece is increased to achieve the mirror effect.The above information was compiled and distributed by the Centrifugal Disc Polishing Machine supplier.

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