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Best metal paint against rust and corrosion?

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Best metal paint against rust and corrosion?

Old 05-16-2018, 05:20 PM
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Default Best metal paint against rust and corrosion?

I'm replacing some 4x4 metal columns on my back patio. The ones I'm taking out were almost completely rusted at the base.
I was wondering if is there any type of paint I can spray on the base to try to prevent this from happening again.

Th bottom 2 or 3 inches of each column will be covered by concrete and then pavers.

Any recommendation?
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Old 05-16-2018, 06:07 PM
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Can’t you get galvanized 4x4’s? What thickness?you could always move up a few gauges increasing the time till it rust through.
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Old 05-16-2018, 06:11 PM
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Por 15

https://www.por15.com
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Old 05-16-2018, 07:07 PM
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I have used por15 with both good and bad results. Need to clean and sand blast the column, prime, and paint. Then good results.
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Old 05-16-2018, 07:14 PM
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If it's hidden I would look at rubberized undercoating. Or 2 part epoxy paint, downside to the epoxy is it cost $100 gallon
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Old 05-16-2018, 07:19 PM
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You need to isolate the concrete from the steel. Mastic, waterproofing...something to keep the moisture and concrete from touching the steel. Paint alone will do nothing. Ideally set a base plate flush with the concrete and then weld the column
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Old 05-16-2018, 07:24 PM
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Originally Posted by duke460 View Post
I have used por15 with both good and bad results. Need to clean and sand blast the column, prime, and paint. Then good results.
When I used POR-15 I thought the instructions stated to remove the flaking rust but leave the light surface rust. My POR-15 application worked wonders. Had to actually chisel it off one spot a year later to make a repair.
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Old 05-16-2018, 10:25 PM
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Originally Posted by AIKO AIKO View Post
Originally Posted by duke460 View Post
I have used por15 with both good and bad results. Need to clean and sand blast the column, prime, and paint. Then good results.
Horrible choice for new non rusted metal, it’s called POR (Paint Over Rust) for a reason.

Originally Posted by Jimm View Post

When I used POR-15 I thought the instructions stated to remove the flaking rust but leave the light surface rust. My POR-15 application worked wonders. Had to actually chisel it off one spot a year later to make a repair.

Yup, if used correctly, in the right application. It’s a bitch to remove. And if it is used, make sure the top coat is applied for anything in the sun all the time.

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Old 05-17-2018, 12:03 AM
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blast, acid and rinse, then cold galv spray from rustoleum if you dont mind powder grey
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Old 05-17-2018, 01:28 AM
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Another for the Rustoleum spray. lasts for years, then repeat when needed.
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Old 05-17-2018, 02:33 AM
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2 part zinc epoxy
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Old 05-17-2018, 06:04 PM
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Galvalume? Think I spelled it right.
Progressive Epoxy.com should get you there.
I have not used this product but have bought from Pr. Ex. and liked what I got.
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Old 05-17-2018, 06:30 PM
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Make sure no water can get trapped on the inside
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Old 05-17-2018, 09:22 PM
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RUST BULLET!!!

https://www.rustbullet.com/rust-bullet-for-marine

NOT cheap but worth every cent.

And yes, I have used it for years and years.
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