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Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

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

RE: Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

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

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RE: Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

(OP)
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

RE: Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

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.

RE: Corrosion resistant metals/alloys withstanding 1000 hrs of Salt Spray

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

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