Electropolishing removes metal instead of adding anything to it. The part hangs in an electrolyte bath as the anode, current flows, and the high points of the surface dissolve faster than the valleys. What comes out is smoother, brighter and cleaner than it went in, with a chromium-rich surface that resists corrosion better than a mechanically polished one — and the process reaches inside bores, corners and weld roots that a polishing wheel never touches.
What gets electropolished
- Hygienic and pharmaceutical parts — vessels, fittings, manifolds and frames that have to be cleaned and stay clean.
- Food and beverage tube and fittings, where a smooth bore matters more than a bright outside.
- Architectural fittings, handrails and hardware in stainless steel that need an even, deep lustre.
- Welded assemblies after fabrication — the bath removes heat tint and embedded iron in the same pass.
Why electropolish rather than buff
A buffing wheel drags a thin layer of metal over the surface and leaves grit, smeared metal and micro-burrs behind. Electropolishing takes that layer away. There is nothing embedded, no directional grain and fewer sites for bacteria or corrosion to start. Complex shapes come out uniform because the bath does not care about geometry, and fine edges are deburred at the same time.
It is also a good final step after our own welding and fabrication: the assembly is cleaned, passivated and brightened in one process instead of three.
From your part to a finished surface
- Send the part or the drawing with the material grade — austenitic stainless grades respond best, and we say so up front if a grade will not.
- We agree the finish level and any areas to be masked, and confirm racking points so contact marks land where they will not show.
- The surface is cleaned, racked, electropolished, rinsed and dried, then inspected against the agreed sample.
- Parts are packed with interleaving — or move on to PVD, marking or assembly without leaving Hidayath.