Which Is Better, Passivation or Electropolishing?

Electropolishing and passivation are very different processes, and to decide which is better for your needs, you should know what these differences are.

Passivation is a chemical process that eliminates free iron and ferrous contaminants that are embedded in stainless steel parts during manufacturing, returning those parts to their original corrosion specifications. Electropolishing is an electrochemical process that treats a wide variety of alloys, including stainless steels, aluminum, copper, brass, titanium, Nitinol and many others, including specialty alloys.

Electropolishing is the more aggressive of the two operations, as it dissolves a uniform layer of surface material from a metal part. This eliminates not only embedded contaminants, but imperfections like mirco cracks and pits that become initiation sites for corrosion. This process makes electropolished parts as much as 30 times more corrosion resistant than passivated parts. Electropolishing also removes oxide scale and heat tint created by manufacturing, which passivation does not. Ultimately, electropolishing is a more comprehensive, versatile and effective process.

Contact us to learn more about electropolishing and passivation

quote
Request a QuoteDiscover the Able Electropolishing Difference »
sample
Try Electropolishing for FreeSend Us Your Part to Process for Free »

Electropolishing Blog

Electropolishing for Finishing Rescue Device Parts

When a marine and rescue hardware manufacturer started developing parts for rescue harnesses in 2018, they knew they needed to find a metal finishing partner with uncompromising standards and no tolerance for error: lives, literally, hang on the line.

Electropolishing for Food Processing Blades

From exposure to salt and acids and near constant moisture, industrial food processing blades must stand up to a wide variety of potentially corrosive ingredients without losing their edge. Such blades must also meet strict requirements regarding quality and cleanliness…

Grow Your Reach, Shrink Lead Time with Trusted Supplier Network

The process of finishing critical metal parts for our clients in industries that include aerospace, medical device design, semiconductor manufacturing, pharmaceutical production – and many others – is incredibly precise. Success can be measured in ten-thousandths of an inch.

What Can and Can’t Be Passivated?

Passivation is a widely used chemical finishing process to remove contaminants and improve the corrosion resistance of metal parts, including stainless steel and alloys like Nitinol and titanium. While passivation can be effective for many parts, for certain parts and…