It is a polishing method that utilizes the phenomenon that the metal to be polished in the electropolishing solution is dissolved preferentially and a smooth and brilliant surface is obtained by passing electricity to the metal to be polished in the electropolishing solution, and no oil or abrasive material is used and no physical force is applied to the stainless steel surface.
The purpose of this process is to improve the cleanability and smoothness of large panels and to remove the fine particles generated by the machining process.
It is suitable for clear target surfaces such as deburring.
For improving the functionality of stainless steel
Abel’s original electropolishing “Bell-Clean”.
We have established a series of “Bell-Clean” clean technologies for electropolishing to meet the stringent requirements of industrial equipment used in the pharmaceutical, semiconductor, food, and energy industries in particular.
Characteristics of electropolishing
1: Improved corrosion resistance (high corrosion resistance by chromium-rich surface)
Electropolishing concentrates chromium on the surface of stainless steel and improves its corrosion resistance.
As can be seen in the figure below, the concentration of chromium on the surface of the poles increased as a result of concentration analysis by Auger electron spectroscopy (AES). The corrosion loss is reduced to 1/4 in the ferric chloride corrosion test (JIS G0578), indicating that the corrosion resistance of the alloy is four times greater than that of the conventional alloy.
2: Improved smoothness and gloss
The removal of microbumps and bumps produces beautiful luster and smoothness.
While the electropolishing solution has low electrical resistance and conducts electricity well, this mucus layer has high electrical resistance and flows much better than the one shown on the right (A) than the one shown on (B). This action selectively dissolves the stainless steel convexity where the current flows better, and the surface is smoothed with time.
Convex parts of stainless steel are preferentially dissolved and the surface is smoothed with time.
Electropolishing is carried out at the same time as the smoothing process.
By removing the unevenness of less than 1/100 microns, the diffuse reflection of light on the metal surface is reduced and a brighter surface is obtained.
3 : Cleanability
The Bell-Clean treatment restores the function of the surface of stainless steel that has been degraded by mechanical polishing and machining, and a clean finish. The “Bell-Clean treatment” dissolves a certain amount of these impurities from the surface and therefore removes them.
Therefore, the surface of the stainless steel is cleaned and its functions (loss of corrosion resistance), which were reduced by mechanical polishing, are restored.
After the treatment, the presence or absence of residue is checked by wiping test.
4: Decontamination (reduction in adhesion of contaminants (impurities) from the outside)
Contaminants are removed from stainless steel by mechanical polishing, etc., and the surface is smoothed and microbumps are removed, resulting in a significant improvement in decontamination.
Stainless steel surface is cleaned
Reduce adhesion of contaminants from the outside
When contaminants are attached, it is effective for decontamination treatment afterwards.
Decontamination maintenance is greatly reduced
With the demand for clean energy, nuclear power generation is playing an increasingly important role.
Electropolishing, which improves corrosion resistance and decontamination performance, is used to reduce the thickness of stainless steel products used in nuclear power equipment and to shorten the periodical inspection time.
Electropolishing of stainless steel panels in the awning process of nuclear power equipment
→ Decontamination improvement
Over 5 years of experience
Delivered to three western Japan electric power companies
Dozens of cases, including scheduled ones (as of January 2010)
We have a proven track record of improving quality compared to other companies’ electropolishing
5: Removal of fine burrs
Removal of fine burrs generated by etching and punching processes is possible.
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