Effect of weather on 304 S/S
Effect of weather on 304 S/S
(OP)
How long will 304 S/S last in an outdoors environment? Where could I find info on this? Would a mil-spec define information like this?
Thanks
Dale
Thanks
Dale
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
Effect of weather on 304 S/S
|
RE: Effect of weather on 304 S/S
304 SS will tarnish and stain in many enviroments especially if near the coast or a heavy industrial area. Chlorides are its worst enemy and can damage highly strained parts.
304 SS will last forever if you are say 20 miles from the sea shore but will require a little care to maintain a good polished finish.
I personally don't know of a mil spec that covers this. There are specifications on treatments for SS to prevent corrosion which inturn will help prevent tarnishing or staining. Don't take this as the last word.
RE: Effect of weather on 304 S/S
RE: Effect of weather on 304 S/S
Mil (federal) spec for stainless steels passivation is QQ-P-35
RE: Effect of weather on 304 S/S
Thanks
Dale
RE: Effect of weather on 304 S/S
http://assist.daps.dla.mil/quicksearch/quicksearch_query.cfm
RE: Effect of weather on 304 S/S
RE: Effect of weather on 304 S/S
Use 2B, bright annealed, or a rolled-on finish and you will avoid that superficial rust. I solved this problem with rusting gasoline pumps this way and they all use it now.
Go to Allegheny Ludlum and ask for lustrite finish. It looks like brushed but it is put on by steel rolls. Or ask for AK Steel's equivalent. Any service center can obtain it also. All the major appliance and food equipment guys use this finish. It was pioneered by J&L Steel in the early '90s under the tradename Koolline. That company is now being bought by Allegheny.
If you can't switch materials, you can get a little improvement from passivating the surface after polishing.
RE: Effect of weather on 304 S/S
mcguire mentioned Allegheny Ludlum in the previous post. Their data sheet on 304 series stainless steels talks about this. Their home page is http://www.alleghenyludlum.com/
Good luck,
-MC
RE: Effect of weather on 304 S/S
RE: Effect of weather on 304 S/S
Thanks
Dale
RE: Effect of weather on 304 S/S
Also use it on my boat on all metals.
http://www.sheilashineinc.com/index.htm
On caveat with SS signs or anything portable made from SS is they are prime targets for thieves according to a friend who is in the scrap business.
It pays to bookmark.
RE: Effect of weather on 304 S/S
RE: Effect of weather on 304 S/S
If I wish to make this 304ss to intergranular corrode under this "normal" condition, what is the least thing that I need to do.
RE: Effect of weather on 304 S/S
Hmm, Streets/New York"--I'm thinkin' pizza!
Salvatio,
As stated in the post by Davefitz, it's Cl, Cl and Cl, at least at "room temp".