INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Corrosion between SS316 and Duplex 32205

Corrosion between SS316 and Duplex 32205

(OP)
Dear All,

I am trying to find the Galvanic potential of the duplex 32205 respect SS316L. Anyone can help to find it?
We need to know if would be corrosion if duplex 32205 and SS316L are in contact and we have to justify.

Thanks.

RE: Corrosion between SS316 and Duplex 32205

The passive potentials are nearly identical, the 316 will go active more easily.
So the result is if you start to have some corrosion the 316 will see an accelerated rate.
Are they being welded or is this a mechanical joint?
How safe is the 316?
If the system would last for decades in all 316 then adding in some 2205 will not hurt anything.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Corrosion between SS316 and Duplex 32205

(OP)
Thanks for your answer EdStainless.

This will be a mechanical Joint. It is to plug (316) a tube (duplex). Do you know where can I find a table for Galvanic potential where appears the duplex 32205?

Regards.

RE: Corrosion between SS316 and Duplex 32205

Beware of crevice corrosion of the 316 plug at the interfacing surface. You may wish to seal weld.

RE: Corrosion between SS316 and Duplex 32205

I hope that these are either mechanically expanded plugs (Pop-a-plug) or welded.
A driven tapered plug is a very bad idea.
And yes, if there is any risk of crevice corrosion the 316 plugs will corrode and fail.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Corrosion between SS316 and Duplex 32205

(OP)
The plug we usually use are rubber expanding plug done at SS316 but in this case we are not sure use SS316 plug with duplex tube.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close