Metal prep
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Laughing Gas
Joined: Dec 2010
Posts: 924
Likes: 1
Metal prep
Hey guys! I haven't posted in a while. But im getting ready grind down some rust spot I have on my floor boards. I'm gonna treat them with por15 and was wondering what could I prep the metal with.
Any suggestions would be great!
Any suggestions would be great!
Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
Likes: 237
From: NE Ohio
If you don't want to mess around, use straight muriatic acid, it will dissolve the rust and give nice shiny metal.
You have about 24 hours before it flash rusts again.
you also can use phosphoric acid which will convert any rust left over to iron oxide.
Use a respirator/safety glasses and chemical resistant rubber gloves and rinse well..
If it's pitted pretty well and grinding/sanding will take too much material off to get to those areas, use a combination.
Muriatic >rinse> phosphoric >rinse >seal
I used muriatic on my drivers doors last summer and rattle can'd it. It still looks good enough.
I used a chemical resistant spray bottle, sprayed the acid on, rinsed it with plenty of water, let it dry and rattled primer/paint on it.
I don't recommend windy days if outside and not in any part of a driveway you care about. It will eat pavement and probably etch concrete.
Since it's floorboards you most likely won't have to worry about that though, as you'll be sponging up the excess.
Keep the other door open to allow airflow thru even though you'll be wearing a respirator you don't want the acid fumes hanging around.
You have about 24 hours before it flash rusts again.
you also can use phosphoric acid which will convert any rust left over to iron oxide.
Use a respirator/safety glasses and chemical resistant rubber gloves and rinse well..
If it's pitted pretty well and grinding/sanding will take too much material off to get to those areas, use a combination.
Muriatic >rinse> phosphoric >rinse >seal
I used muriatic on my drivers doors last summer and rattle can'd it. It still looks good enough.
I used a chemical resistant spray bottle, sprayed the acid on, rinsed it with plenty of water, let it dry and rattled primer/paint on it.
I don't recommend windy days if outside and not in any part of a driveway you care about. It will eat pavement and probably etch concrete.
Since it's floorboards you most likely won't have to worry about that though, as you'll be sponging up the excess.
Keep the other door open to allow airflow thru even though you'll be wearing a respirator you don't want the acid fumes hanging around.
Tuned
Joined: Apr 2008
Posts: 331
Likes: 9
Fleet Mechanic
Joined: Jul 2003
Posts: 1,844
Likes: 129
From: Atlantic Canada
I've been using Ospho lately and have been pretty happy with it.
Ospho Rust Treatment - Since 1947
Once it dries I just over it with a rust paint.
Ospho Rust Treatment - Since 1947
Once it dries I just over it with a rust paint.
Tuned
Joined: Apr 2008
Posts: 331
Likes: 9
On my research the POR15 required metal etching to adhere to clean metal surfaces - could you post an update on how well it holds up at a later date?
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sancochojoe
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