Ospho?

[Mr.Glock]

It came about in 1947, been around awhile.

Any of you ever use it? I have used it all my life. Grandpa kept it around when we would fabricate /paint old Dozers, Tractors, Trailers and when we would re paint our drilling rigs.
It chemically changes rust “iron oxide to an inert “iron phosphate” stops the rust in its tracks and seals it in a layer of zink phosphate. No need to primer, just paint. I treat the Fire Hydrants I strip down. It makes paint adhere tough. Caution: It is caustic as hell, where long sleeves and runner gloves!



Finished my gate and install, and photos of the raw gate and after treatment. I used it a lot on the farm repairing calcium chloride filled tractor rims.

 

[Okie4570]

I've never tried it just because where I was using there was glass and seals (vehicles) involved and just used POR15. Looks like it works well though.

 

[PanhandleGlocker]

I might have to try that on a pipe fence I’m building!

 

[Dr_Mitch]

Looks like an awesome product, thanks for posting! Never heard of this before.

 

[Bocephus123]

It came about in 1947, been around awhile.

Any of you ever use it? I have used it all my life. Grandpa kept it around when we would fabricate /paint old Dozers, Tractors, Trailers and when we would re paint our drilling rigs.
It chemically changes rust “iron oxide to an inert “iron phosphate” stops the rust in its tracks and seals it in a layer of zink phosphate. No need to primer, just paint. I treat the Fire Hydrants I strip down. It makes paint adhere tough. Caution: It is caustic as hell, where long sleeves and runner gloves!

View attachment 419911

Finished my gate and install, and photos of the raw gate and after treatment. I used it a lot on the farm repairing calcium chloride filled tractor rims.




View attachment 419905View attachment 419906View attachment 419907View attachment 419908View attachment 419909

yep used it before

 

[Mr.Glock]

I might have to try that on a pipe fence I’m building!

Good thick rubber glove and some small rags make short work on pipe and cable. A little bit goes a long ways. I don’t know how it does it, but it makes paint stick, hard and lasts longer too.

Sounds like some miracle ****!! Huh? I will never paint bare/rusty metal with out it. I have also seen some art work welding clear coated over it and it makes for some cool ass Art with it clear coated!


You get it dripped or over sprayed on you, you will feel it. I hate spray bottle in any wind. But long sleeves suffice well.

 

[SlugSlinger]

Phosphoric acid. Used it several times.

 

[Oklahomabassin]

I've never tried it just because where I was using there was glass and seals (vehicles) involved and just used POR15. Looks like it works well though.

Do you put this directly on rust?

 

[Okie4570]

Do you put this directly on rust?

Wire wheel the flaky rust off and then make sure it's degreased and then brush or spray on. POR15 makes a degreaser/etcher to use to degrease. IIRC the degreaser can't be solvent based before applying the POR15

 

[Camo]

Yes I have a gallon out in my shop. Been using it for years.