What is Electropolishing?
Electropolishing is a reverse plating process. Parts are fixtured onto a special rack or basket and then lowered into a specially blended chemical bath . Electrical current is then applied to the part. “Instead of adding to the surface imperfections such as impurities, and burrs, and other defects to be” removed. The process is monitored and refined to remove metal uniformly to customer specifications “allowing great benefit on ultracleaning, microfinishing, and corrosion protection. Electropolishing” processes generally specified to ASTM B912-00.eo.
Who Should be using electropolishing?
When a design requires a metal finish that demands a smoothness that cannot be obtained by “mechanical means, electropolishing is the answer. A surface can generally be improved to” approximately one half of the initial surface measurement . Some surfaces can be obtained that “become non-particulating surfaces, I.e. so smooth, particles cannot be entrapped and adhere to the” metal. The micro inch measurement can be taken to the single digit level.
Many future problems are avoided by the passivation enhancement which is as much as 3000 percent greater than with standard nitric acid passivation for stainless steel material.
The electro-chemical machining capabilities of electropolishing gives the designer the assurance that the tolerances of the final machined part can be accomplished. With thecapability of controlling “surface removal of .0001 inch per surface, most tolerances can be maintained. The deburring of ” machined components is easily accomplished by electropolishing since the protrusions are the first “attacked, they are burnned away to produce a smooth uniform surface.”
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– Improved corrosion resistance and durability – Reduced friction and wear ”
– Easier cleaning, reduced build-up of products on the surface, reduced bacterial growth”
– Reduced radioactive contamination and improved decontamination behaviour
– Prevention of catalytic wall reaction – Reduced pumping times to achieve high vacuum
– Improved high frequency conductivity – Improved adhesion of plating deposits
– Optimum reflectivity Increased ratio of chromium to iron Reduced buffing and gringing costs Stress relieved surface No mess in your workshop!