Galvanic Worries?
Galvanic Worries?
(OP)
I'm planning on through bolting some stainless chain to some plain steel pipe bollards outside. There will be some stainless parts, washers and shouldered eye-bolts (probably 304) in direct contact with the steel pipe. The whole pipe setup will also be concrete filled.
Will the pipe tend to corrode where the stainless is in contact? We are also hanging some signs onto the stainless chain with brass S-hooks. Will those also corrode?
This is in the Tampa area, close to the coast, so will have humid, possibly salty air. We'd like these things to last 20+ years if possible. Not so worried about the sign hook, those will need replaced due to simple damage before corroding, but I'd hate for the bollards to look like crap after a few years.
Will the pipe tend to corrode where the stainless is in contact? We are also hanging some signs onto the stainless chain with brass S-hooks. Will those also corrode?
This is in the Tampa area, close to the coast, so will have humid, possibly salty air. We'd like these things to last 20+ years if possible. Not so worried about the sign hook, those will need replaced due to simple damage before corroding, but I'd hate for the bollards to look like crap after a few years.





RE: Galvanic Worries?
If this is near the water (can you see it from there?) 304 will not cut it for long term service.
Do you really care what it looks like? If it bleeds rust is it OK? If so then all galvanized steel might be a better bet. Just let it rust. If you make it heavy enough it will last.
Often ballards that you see are plastic or stainless caps over filled steel pipe. This keeps the total cost down. If you make stainless caps do not make the tops flat. They need to be domed enought for water to run off and for birds to not like to land on them.
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RE: Galvanic Worries?
RE: Galvanic Worries?
RE: Galvanic Worries?
RE: Galvanic Worries?
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
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RE: Galvanic Worries?
On the outside, a shouldered lifting eye-bolt will be threaded onto the exposed stainless rod. The paint will help on the outside, but I thought another non-metallic washer could be used between the eye-bolt and CS pipe.
RE: Galvanic Worries?
Do you really want to use threads? Do these need to be removable?
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Galvanic Worries?
RE: Galvanic Worries?