How to make the metal surface smooth

1. The following methods can be used to smooth the metal surface: electrophoresis, micro-arc oxidation, electroplating, wire drawing, sand blasting and polishing. (Limited to space, only from the principle analysis, not involving specific process flow)

2. Metal surface treatment methods include anodic oxidation, electrophoresis, micro-arc oxidation, electroplating, powder spraying, wire drawing, sand blasting, polishing and etching.

Third, the principle analysis

Anodizing: mainly anodizing of aluminum, using electrochemical principle to form a layer of Al2O3 (alumina) film on the surface of aluminum and aluminum alloy. This oxide film has special characteristics such as protection, decoration, insulation and wear resistance.

Electrophoresis: used for stainless steel, aluminum alloy, etc. It can make the product present various colors, keep metallic luster, enhance the surface performance at the same time, and has good anticorrosion performance.

Micro-arc oxidation: the process of applying high voltage in electrolyte solution (usually weak alkaline solution) to form ceramic surface film is the result of the synergistic effect of physical discharge and electrochemical oxidation. Features: ceramic texture, dull appearance, no high-gloss products, delicate feel, anti-fingerprint; Various substrates: aluminum, titanium, zinc, zirconium, magnesium, niobium and their alloys; Simple pretreatment, excellent corrosion resistance, weather resistance and good heat dissipation.

Electroplating: it is the process of attaching a metal film to the metal surface by electrolysis, which can prevent corrosion, improve wear resistance, conductivity, reflectivity and aesthetics.

Powder spraying: powder coating is sprayed on the surface of the workpiece by powder spraying equipment (electrostatic plastic spraying machine), and under the action of static electricity, powder will be uniformly adsorbed on the surface of the workpiece to form a powder coating; Powder coatings are baked, leveled and cured at high temperature to become final coatings with different effects (different kinds of effects of powder coatings).

Wire drawing: it is a surface treatment method that forms lines on the surface of workpiece by grinding products and plays a decorative role. ? Wire drawing treatment can make the metal surface obtain non-mirror metallic luster, and at the same time, wire drawing treatment can also eliminate subtle defects on the metal surface.

Sandblasting: It is a process that compressed air is used as the power to form a high-speed jet beam, and materials are sprayed to the surface of the workpiece to be processed at high speed, so that the appearance or shape of the outer surface of the workpiece surface changes and a certain cleanliness and different roughness are obtained. Features: It can clean the tiny burrs on the surface of the workpiece, make the surface of the workpiece smoother, eliminate the harm of burrs and improve the quality of the workpiece.

Polishing: modifying the surface of the workpiece by using flexible polishing tools and abrasive particles or other polishing media. Improve the dimensional accuracy or geometric accuracy of the workpiece, get smooth surface or mirror luster, and eliminate luster at the same time.

Etching: etching, also called photochemical etching, refers to removing the protective film of the area to be etched after exposure and development, and contacting with chemical solution during etching to achieve the effect of dissolution and corrosion, forming concave-convex or hollow molding.