Dissimilar Metal Corrosion Protection
08-23-2006, 12:32 AM,
#1
Dissimilar Metal Corrosion Protection

Hello Group,

Is there a coating solution in order to avoid dissimilar metal corrosion between stainless steel and hard anodize aluminum?

I would like to coat stainless steel nuts with a "non-metallic product" to isolate it from being in contact with aluminum alloy.

I do not have the possibility of simply using plastic washers...

I will appreciate any of your suggestion?

Would Endura coating serie 300 with Teflon seal work for example?

Thank you for your help,

Cheers,

Charles
Reply
08-23-2006, 06:11 PM,
#2
RE: Dissimilar Metal Corrosion Protection
Hi BELLAMARE

Welcome to the Surface Engineering Forum.

Electrical isolation is important here and the type of product you mentioned could be worth trying. My concern would be with isolating the threaded area of the nut. Is the stud or bolt of the same material and is that also going to be isolated?
Reply
08-23-2006, 06:55 PM,
#3
RE: Dissimilar Metal Corrosion Protection
Hi Gordon,

Yes, the bolt will be of same material than the nut. The bolt's head of the nut would be insulated from the aluminum by some kind of plastic/fiberglass washer.

I am worried about the aluminum pitting underneath the nut as the structure is exposed to sea-water...

Reply
08-23-2006, 11:46 PM,
#4
RE: Dissimilar Metal Corrosion Protection
At least electrically isolating nut and bolt from the aluminium should stop any bimetallic corrosion adding to the potential of crevice corrosion around the covered and non-covered areas. I think using anodised aluminium may also help. At this point I'm thinking It would be good to have an expert in corrosion science join the forum Ashamed0002anybody out there? Happy0193
Reply
11-13-2007, 10:41 PM,
#5
RE: Dissimilar Metal Corrosion Protection
BELLAMARE Wrote:Hello Group,

Is there a coating solution in order to avoid dissimilar metal corrosion between stainless steel and hard anodize aluminum?

I would like to coat stainless steel nuts with a "non-metallic product" to isolate it from being in contact with aluminum alloy.

I do not have the possibility of simply using plastic washers...

I will appreciate any of your suggestion?

Would Endura coating serie 300 with Teflon seal work for example?

Thank you for your help,

Cheers,

Charles

A product called ECK® is a patented coating for preventing dissimilar metal corrosion. https://www.vannay.com
Reply




Possibly Related Threads…
Thread Author Replies Views Last Post
Lightning Aluminum Foil wrapping as corrosion protection instead of coating LouisRichter 2 5,514 09-22-2017, 11:07 AM
Last Post: madan.pal
  Corrosion protection plasmajet1990 1 2,424 09-25-2015, 10:52 AM
Last Post: Joris Kraak
  Corrosion protection of pumps shantanu 5 5,721 08-01-2012, 06:37 PM
Last Post: k09
  Hot corrosion/erosion of metal Operator Mike 7 11,280 08-08-2009, 07:29 PM
Last Post: Gordon
  Corrosion Protection Chris Wheatley 5 6,719 06-04-2009, 07:16 PM
Last Post: djewell
  Copper protection against high temperature corrosion hgjor 1 6,495 05-10-2008, 02:07 PM
Last Post: Gordon
  corrosion protection of potable water pipelines basakglkn 1 5,277 11-29-2007, 06:47 PM
Last Post: Gordon
  Corrosion protection Yanni 1 5,007 12-05-2006, 06:03 PM
Last Post: Gordon



Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd