Heat Treating, Electropolishing & Passivation

Heat Treating

Huron metallurgic heat treating services include controlled atmosphere processing for your hardness requirements. Such elevated temperature quenching ensures minimal material distortion on even the most precise parts. Processing per our customer requirements…


Electrochemical in nature, the electropolishing process uses a combination of rectified current and a blended chemical electrolyte bath to remove flaws from the surface of a metal part. Once the process is completed, the part is run through a series of cleaning and drying steps to remove clinging electrolytes. The resultant surface is clean and bright, free from burrs and excess material.


Passivation is a chemical process that removes free iron and creates a chromium-rich surface on the material. This process improves corrosion resistance on a wide range of metals, including the full range of stainless steels and many other alloys. By dissolving surface metal, passivation removes deeply imbedded contamination, reduces surface area and removes the false or amorphous layer that is produced by grinding, machining, stamping or lapping metal. Less imbedded contamination and less retained surface moisture minimizes the chance for corrosion. As such, medical parts better resist harsh autoclave chemicals and temperatures. Passivation can be performed using either a nitric or more environmentally friendly citric acid bath.