Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

[hnaziri]

Are there any stainless steels or corrosion resistant metals/alloys that withstand 1000 hours of salt spray testing?

 

[CoryPad]

What is your definition of withstand? There are coatings available for carbon steel that allow it to complete 1000 hours of ASTM B 117 testing with no visible red rust. If this meets your needs, please reply and I can provide more information.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[hnaziri]

Thanks Cory, but I'm looking for the stainless steels or nonferrous alloys that would complete 1000 hours of ASTM B 117 or B 368 without any visible corrosion or pits.

Regards,

Hamid

 

[CoryPad]

Titanium alloys are essentially immune to salt spray, so I would consider them.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[EdStainless]

It depends on what you mean by resistant.
On clean, bold, fine finished samples, 316L does not stain.
But if there is any wet/dry cycling or crevices then all bets are off.
I am looking for a NASA paper where they sprayed stainless samples with acidified salt water twice/day and then let them dry. The samples had crevices and were out doors, but there was a roof over them.
The best I remember the 304, 316, 317 and 2205 all rust stained. The 304 and 316 actually pitted through.
Only the superferritic Sea-Cure and superaustenitic AL-6XN survived unscathed.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm