Previous in Forum: Who is Sarah Boone   Next in Forum: Nova Interview With Andy Knoll on the Origins of Life
Close
Close
Close
5 comments
Rate Comments: Nested
Participant

Join Date: Mar 2009
Posts: 3

CR4 next to Stainless - will galvanic corrosion occur?

03/12/2009 5:48 AM

We potentially have an issue with some mild steel station benches that we are refurbishing for a customer. The legs are rusting under the plastic surface coating.

As this seems the only place any corrosion occurs we were considering replacing the bottom half of the legs with stainless prior to the new surface finish- but will this cause galvanic corrosion?

Our other alternative is to replace the legs with mild and galv the whole thing, although this will be much more costly- and the client will have a bench that lasts much longer than he maybe wants (his business relies on them having to be replaced periodically, so the product could be 'too good' if that makes sense.)

Any help would be greatly appreciated.

Simon :)

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Power-User

Join Date: Jul 2008
Posts: 183
Good Answers: 4
#1

Re: CR4 next to Stainless - will galvanic corrosion occur?

03/12/2009 6:58 AM

Oak doesn't rust, considered a hardwood?

Register to Reply
Participant

Join Date: Mar 2009
Posts: 3
#2
In reply to #1

Re: CR4 next to Stainless - will galvanic corrosion occur?

03/12/2009 7:02 AM

Its a refurb project on customers benches, which are CR4. They're for the passenger transport industry and are to be refurb'd to 'as new' condition.

Register to Reply
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#3
In reply to #2

Re: CR4 next to Stainless - will galvanic corrosion occur?

03/12/2009 7:31 PM

"As new condition" doesn't allow materials substitutions.

Can you get a waiver?

Are you going to weld, screw, clamp, glue the bottom legs?

Register to Reply
Participant

Join Date: Mar 2009
Posts: 3
#4

Re: CR4 next to Stainless - will galvanic corrosion occur?

03/13/2009 4:05 AM

'As New' being cosmetic condition.

Whilst I can cut away the rusted parts of the legs and replace with cr4 tube as original, it seems sensible to try and address the issue so it doen's happen again.

Register to Reply
Anonymous Poster
#5
In reply to #4

Re: CR4 next to Stainless - will galvanic corrosion occur?

03/13/2009 7:45 AM

CR4 should be a 4% Cr steel , a low alloy steel. This tpe of steel, depending on the exposure (marine atmosphere, industrial...) is subject to corrosion. If you upgrade to a Stainless Steel you should avoid any corrosion but you've to select the corret type of SS based on the atmospheric conditions. If you think to join SS to CR4 galvanic corrosion could be a problem..

S

corrosion prevention & control

Register to Reply
Register to Reply 5 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); BiomedWV (1); lyn (1); RRH (2)

Previous in Forum: Who is Sarah Boone   Next in Forum: Nova Interview With Andy Knoll on the Origins of Life

Advertisement