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Galvanic Corrosion Between Inco 625 and K500

Galvanic Corrosion Between Inco 625 and K500

Galvanic Corrosion Between Inco 625 and K500

(OP)
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.

RE: Galvanic Corrosion Between Inco 625 and K500

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

RE: Galvanic Corrosion Between Inco 625 and K500

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

Greg
System 22, Inc.

RE: Galvanic Corrosion Between Inco 625 and K500

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

Steve Jones
Corrosion Management Consultant

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

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