Your browser is out of date.

You are currently using Internet Explorer 7/8/9, which is not supported by our site. For the best experience, please use one of the latest browsers.

Passivating 300 Series & 400 Series Stainless Steel

300 and 400 series stainless steel alloys are frequently used due to their strength, relatively low weight relative to other materials, and exceptional corrosion resistance. However, the corrosion resistance of stainless steel can be reduced during the manufacturing process; grease, oil, iron particles, and other contaminants can be left behind, which can compromise the chromium oxide layer that forms naturally on the surface of stainless steel when exposed to air. 

Request A Quote
Aerospace electropolished and passivated parts


The solution is passivation, which helps the protective oxide layer form faster and makes it thicker.  And unlike electropolishing, passivation:

  • Does not use electricity as part of the process
  • Doesn’t alter the appearance of the material
  • Doesn’t change the appearance of the steel

300 Series Stainless Steel Passivation

We can provide passivation services for a range of grades of 300 series stainless steel, including:

  • 301
  • 302
  • 303
  • 304
  • 304/L
  • 304/304L Prodec
  • 304/H
  • 305
  • 316
  • 316/L
  • 316/316L Prodec
  • 317/L
  • 317LMN
  • 321
  • 321/321H
  • 347
  • 347/347H
  • 304 Sintered
  • 309/309S
  • 310/S
  • 310H
  • 318 (2205 Duplex)
  • 330 (cast)
Request a Quote
passivated metal parts

400 Series Stainless Steel Passivation

We also provide quality passivation services for the full range of the 400 series of stainless steel, including:

  • 403
  • 405
  • 409
  • 410
  • 410S
  • 410HT
  • 416
  • 416HT
  • 420422
  • 430
  • 440C

Why Choose Electro-Max, Inc.?

We can provide passivation services on stainless steel materials and products of any shape, and in exceptionally large sizes. For more detailed information, check out the benefits of passivation, passivating other metals & metal alloys, the passivation industries served, and learn more about what is passivation. For any questions you may have, contact us today!

Contact Us
Industries Served for Electropolishing & Passivation Services

Electro-Max, Inc. is your go-to for all electropolishing services in a variety of industries! Certain industries need high levels of durability and corrosion resistance in their finished parts. Turn to Electro-Max, Inc. for first-class electropolishing and passivation services.

Do you have questions?
Ask an expert today.

Give us a call or fill out the form below and one of our team members will be in touch as soon as possible.
*marks required fields

Or Give Us a Call
(847) 683-4100

Max Size: Up to 3 files, totaling 10 MB