The authoritative public forum
  for Metal Finishing since 1989
-----

Alternate finish needed for blued spring clips

I currently have a rust issue with a 0.010" thick cold rolled annealed spring clip. It is natural blued after hardening. These parts are used in a chassis that is installed in a CO environment; not exposed to extreme elements. Our customers have advised these clips are rusting after they have been in the field for a period of time. I am looking for an alternative finish that will prevent this without changing the integrity of the heat treating process. Please advise your recommendation(s). Thanks in advance!

Tory Giammanco
Principal Engr. - Telecom - Rolling Meadows, IL, USA
2003

---

These oxide finishes offer little if any corrosion resistance. You may need to do something more radical like zinc plating them, but since the exposure is mild you could try a water soluble wax or lacquer, or a light oiling of your blued finish first. Your local plating supplies distributor should be able to suggest such a dip.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

---

With Zinc plating you will have to consider hydrogen embrittlement. Wax, oil or simple dip coat paint are easy options. E-coating is another option you can try.

Gurvin Singh
Mohali, Punjab, India
2004