Wonder rust remover on steel beams

[SNIPER 3000]

Anyone used Wonder rust remover on steel beams? I am planning to use it on my steel structure, not a lot of information on it and i have asked builders who used it on roofs. Was wondering what the learned guys think about it, Rory, rspann all the structural guys share your experiences. Basically is it safe to use on steel structures mainly the post?
Thanks.

[rspann]

Buff it and use red oxide. No need for wonder.

[pugboy]

wonder is phosphric acid which eats the metal oxide/rust as well as etches the raw steel surface slightly to give a little surface prep protection
its good for light surface rust as it will eat it off

if the rust is deeply embedded it will form a black layer over the embedded rust
however I have found that eventually the rust under may come alive later even if primed and painted.

Better to use angle grinder and grind off deep rust and paint with the wonder then wash off
because it also sometimes leaves a crusty residue which can flake off with the primer/paint

if you wash it off after it letting it act for a few hours the surface will be kinda matt and primer adheres well.

[Eagle View Enterprises]

I always use it. Put in a spray bottle and spray it on. Let dry as it forms an oxidized primed surface. then i paint red oxide. Been doing it for years now.

[adnj]

+1 on answers above. It will not harm a steel beam.

[De Dragon]

Use a spray bottle or can (depending on the amount of steel that you have to treat) let it dry, rub/brush off the oxide formed, and paint with red/gray oxide.

[matix]

Anyone used Wonder rust remover on steel beams? I am planning to use it on my steel structure, not a lot of information on it and i have asked builders who used it on roofs. Was wondering what the learned guys think about it, Rory, rspann all the structural guys share your experiences. Basically is it safe to use on steel structures mainly the post?
Thanks.

What’s the condition of the steel beams? I just buff the beams, wipe with gas and prime.

[ADONI]

OP, I also use Rustoleum Rusty Metal Primer. It seems to hold real good to rusty metal thus far.

[SNIPER 3000]

Anyone used Wonder rust remover on steel beams? I am planning to use it on my steel structure, not a lot of information on it and i have asked builders who used it on roofs. Was wondering what the learned guys think about it, Rory, rspann all the structural guys share your experiences. Basically is it safe to use on steel structures mainly the post?
Thanks.

What’s the condition of the steel beams? I just buff the beams, wipe with gas and prime.

Its surface rust, in pretty good condition. Was going to use it as a precaution.

[SNIPER 3000]

OP, I also use Rustoleum Rusty Metal Primer. It seems to hold real good to rusty metal thus far.

Will look into it. thanks.

[SNIPER 3000]

Buff it and use red oxide. No need for wonder.

Its painted with grey primer, has some small rust on the surface. Too much to buff, the building is up just wanted to add some sort of protector on the steel before painting again.

[SNIPER 3000]

Use a spray bottle or can (depending on the amount of steel that you have to treat) let it dry, rub/brush off the oxide formed, and paint with red/gray oxide.

I always use it. Put in a spray bottle and spray it on. Let dry as it forms an oxidized primed surface. then i paint red oxide. Been doing it for years now.

Yes will try this method, might have to wash the beams down before spraying the wonder.

[rspann]

Wonder leaves a phosphate coating if left to dry. A sort of whitish powdery coating. You can just paint it back with some more grey oxide if you choose. A very good rust treatment is magic rust seal. Most hardwares has it ,the dealer is on O'Meara rd opposite ACL. It dries as a black primer ,in half an hour. Just wipe it on the beams with a cloth or brush ,it will treat the rust, then paint with zinc chromate red or grey.

[4kin4kar]

Pressure was the beams first.... Remember to wear eye protection.

[De Dragon]

Wonder leaves a phosphate coating if left to dry. A sort of whitish powdery coating. You can just paint it back with some more grey oxide if you choose. A very good rust treatment is magic rust seal. Most hardwares has it ,the dealer is on O'Meara rd opposite ACL. It dries as a black primer ,in half an hour. Just wipe it on the beams with a cloth or brush ,it will treat the rust, then paint with zinc chromate red or grey.

Any idea of the prices? Those small spray bottles in hardwares/tile places are around $75.
I'm looking for like 5 gallons.

[rspann]

The dealer is on O'Meara rd, but I can't remember the name. Probably someone who is in that area can help.

[RedVEVO]

Just use a steel brush , remove the rust then red oxide .

[SNIPER 3000]

Wonder leaves a phosphate coating if left to dry. A sort of whitish powdery coating. You can just paint it back with some more grey oxide if you choose. A very good rust treatment is magic rust seal. Most hardwares has it ,the dealer is on O'Meara rd opposite ACL. It dries as a black primer ,in half an hour. Just wipe it on the beams with a cloth or brush ,it will treat the rust, then paint with zinc chromate red or grey.

Any idea of the prices? Those small spray bottles in hardwares/tile places are around $75.
I'm looking for like 5 gallons.

Much more expensive than wonder, the magic rust is around 500tt a gallon, more or less depends where you go.

[AbuUwais]

I always use it. Put in a spray bottle and spray it on. Let dry as it forms an oxidized primed surface. then i paint red oxide. Been doing it for years now.

Does the whitish and black foam residue from wonder plus rust remover prevent paint adhesion? If yes, whats the best way to remove, wiping, brushing off, washing?

I used it on a piece of new c channel with some mill scale left after wire brushing and sanding , no rust was really there but i wanted the chemical coat as a primer before i put grey oxide.

[Dave]

Any paint remover/metal cleaner must be removed throughly before any paint is applied.

[Ben_spanna]

whatever you use to clean the metal, ensure that after cleaning that you clean it thoroughly and allow ample time to dry with the least amount of residue possible then, coat with Red oxide or universal metal primer, or if you an afford then go for a 2 part epoxy metal primer......

[AbuUwais]

I cleaned the steel with wire brush and sandpaper
Then applied wonder plus
The next day i checked it and it had a black coating (which i expected) but it was rough and uneven like foam but hard and crispy like a crust and can come off, some parts easy to scrape with finger nails and other spots not so easy. The whitish residue can wash off its not difficult to remove. I tried scrubbing with a scrubbing brush but not much help.
I dont think this black crust shud get coated with grey oxide primer because im sure it'll just flake off with gentle rubs nocks or grasping firmly with hands.

Any idea what to do about this crust and how to remove?

Below it is a dull light grey finish on the bare steel.

[pugboy]

steel brush should take it off