Passivation and electrolytic polishing solutions
Achieve a mirror finish and enhanced corrosion resistance with our electropolishing services. Our process ensures precision, improved sanitation and superior aesthetics.
Surface Finishing
Passivation and electrolytic polishing services
Both electrolytic polishing and passivation are effective methods of improving the corrosion resistance and surface finish of metals. Electropolishing removes a thin layer of metal, leaving a smooth and reflective surface, while passivation forms a protective oxide layer on the surface to improve surface roughness and corrosion resistance.
Surface Finishing
Passivation and electrolytic polishing of CNC machined stainless steel parts
The principle of stainless steel passivation Passivation is to make the metal surface into a state that is not easy to be oxidized, slowing down the rate of metal corrosion of a method. Metal corrosion products in the role of the medium to generate a dense structure, the formation of a thin film, tightly covered in the metal surface, changing the surface state of the metal, so that the metal electrode potential greatly jumped, become corrosion of the passivity, and show the corrosion resistance of precious metals, this layer of film is called passivation film.
Surface Finishing
Roughness change of stainless steel electrolytic polishing
Before electropolishing: roughness distribution in 1.0-3.0um. After electropolishing: roughness distribution within 0.3um. The size of electrolytic polishing will only be reduced, and the range of reduction is uncertain. The size of products with better roughness will be thrown off within 10um, and those with larger roughness will be thrown off dozens of um.
Advantage
⑴The color inside and outside is consistent, the luster is long-lasting, and the recesses that cannot be polished by mechanical polishing can be smoothed.
⑵High production efficiency and low cost.
⑶ Increase the corrosion resistance of the workpiece surface.
Stainless steel passivation and electrolytic polishing capabilities
| stype | Nitric acid passivation、Citric acid passivation | Electrolyte polishing |
| base material | Stainless steel series | 300 series stainless steel |
| standard | ASTN A967 | GB/T 20016 |
| Maximum machining size（cm) | 100*45*80 | 100*45*80 |
| Unit Max Weight（kg) | 80 | 50 |
| colour | natural color | gloss white |
| test method | Boiling water test, wet cloth test, temperature experiment, the water immersion test, salt spray test, humid copper sulfate test experiment | dimensional gauging，Appearance instrumentation |
