Galvanic Corrosion Between Inco 625 and K500 1

[FastenerDude]

Will galvanic corrosion occur between Inco 625 and K500 material? I have a customer who wants to buy a Inco 625 Socket Head Cap Screw along with a K500 lockwasher. The environment will be subsea. I offered a K500 lockwasher b/c you can get a "true" lockwasher in this material where as with Inco 625, you are basically getting a flat washer that is split.

Greg
System 22, Inc.

 

[EdStainless]

What are they screwed into?
If it is less corrosion resistant then either then there is no issue.
I doubt that there will be problems, though in the past I strongly favored using K500 for washer and bolt.

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Plymouth Tube

 

[FastenerDude]

The screws will be installed into a fabricated part made completely out of Inconel 625.

Greg
System 22, Inc.

 

[SJones]

If the parts receive cathodic protection, the issue goes away.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.