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Posted: 2/27/2009 4:27:13 PM EST
Will 40% humidity cause rust if the temp stays constant?
Link Posted: 2/27/2009 4:28:46 PM EST
[Last Edit: 2/27/2009 4:30:08 PM EST by gonzo_beyondo]
Probably not.

ETA: Thats not very humid...
however, some things rust very easy. Some things won't rust in 90% humidity.
Depends what it is, and if it is maintained, as in oiled/preserved.
Link Posted: 2/27/2009 4:28:58 PM EST
Probably but our 5 percent causes a lot of static electricity.
Link Posted: 2/27/2009 4:30:40 PM EST
Depends more on what, exactly.

Metal rusts here in Co, where its very dry. Depends on how well its treated.
Link Posted: 2/27/2009 4:31:42 PM EST
Originally Posted By dragongoddess:
Probably but our 5 percent causes a lot of static electricity.

Your skin must suit your screenname too.
Link Posted: 2/27/2009 4:37:06 PM EST
Most likely....over time

And as the humidity rate goes up, the oxidation goes up.
Link Posted: 2/27/2009 4:50:38 PM EST
With 40% humidity, I doubt you'd ever see rust form on guns that are wiped with a oily rag every few months. In my house, the humidity ranges from 50-60% in the summer to 40-45% in the winter. I always wipe a gun off after I touch it. Some guns don't get wiped off for a year or so if I don't handle them. I have never had rust form on any firearm.
Link Posted: 2/27/2009 4:54:54 PM EST
dew is your biggest enemy. Humidity is relative to temperature. Temp goes down, relative humidity goes up. If air circulation is poor, some thing will change temperature quicker - it will get wet first.

I have heard of rain inside of our shooting trailer - Warm/humid air went in during the day, but the walls/roof hit dew point overnight.
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