rust converter

surfinkombi66 · Post by **surfinkombi66** » Sun Dec 04, 2005 8:38 am

has anyone actually used the phosphuric acid "rust eater" stuff on a vw and had good results. I have no sandblasting resources aroudn the base I just got stationed at and I need some rust removal. I was just wondering if anyone has used it.

thanks

josh

Plastermaster · Post by **Plastermaster** » Sun Dec 04, 2005 9:47 am

I have experimented with it and it does prevent rust. I like the idea because it doesn't hide anything should there be a failure as with a thick coating of some other barrier type coating. I would check up on it occasionally and if you see any rust, just treat that area again. The samples I did never developed any rust.

Ron

Volcano · Post by **Volcano** » Mon Dec 05, 2005 3:24 am

I've been using "Ospho" for over 30 years.When used correctly it's great stuff.It's not a finishing product.It should be covered.You can't paint over rust without killing it or removing it somehow.Ospho only works on rust.It should be left to dry overnight.I usually clean the surface with alcohol before painting with primer.Play with it a little until you get the hang of it. Good luck

raygreenwood · Post by **raygreenwood** » Mon Dec 05, 2005 6:34 am

Volcano is dead on. There are some niceties to be observed in its use. It should not be used on thick crusty rust. That should be removed down to just light surface rust and pits with rust in them. The chemical must be able to penetrate what rust there is. The converted rust ...which turns to like ...and don't quote me on the exact chemical..but its like iron phosphate.....this makes a great primer for paint. But it must be painted. Generally I wire wheel everything, then I strip crusty rust with Muriatic acid. This totally removes all rust. Then let it lightly re-rust...hen spray on ospho, let it dry overnight and then soak it again. Then...as volcano noted...its good to clean away any un-reacted residue with either alcohol or a fast evaporating chemical solvent like berrymans b-12.

A very good technique for prevention on a previously rusted surface...like suspension components (but not on machined surface areas that have critical measurements)...is to take those parts down to very clean metal with acid. Then spritz with water...let these evenly surface rust for a couple days. Then treat with ospho for perfect, even rust conversion..then clean...then paint. Ray

surfinkombi66 · Post by **surfinkombi66** » Wed Dec 07, 2005 7:11 pm

thanks alot guys. where can i find this muriatic acid at?

wildthings · Post by **wildthings** » Wed Dec 07, 2005 7:59 pm

It can be found at most any building supply place for about $4 a gallon. They sell it for cleaning bricks, concrete, etc.

SBNova · Post by **SBNova** » Mon Jan 16, 2006 11:07 am

Ive used Ospho for years myself. Recently while working on my bug I had a small dish of Ospho left over. I figured I would throw in a handfull of pan and fender bolts and washers. I left them in for about a week (accidentaly) and the washers from my fenders were down to paper thin!! They sure werent rusty though!! I love Ospho but would advise against long term soaking anything important.

MNAirHead · Post by **MNAirHead** » Wed Apr 26, 2006 12:17 am

where do we buy Ospho

62splitben · Post by **62splitben** » Fri Apr 28, 2006 3:08 pm

POR 15 PRODUCT ARE VERY GOOD DID MY VAN IN METAL READY ,ITS NOT IN PAINT YET BUT BEEN BARE FOR 3 MONTHS RUST HASNT COME BACK YET

MedicTed · Post by **MedicTed** » Sat Apr 29, 2006 6:31 am

I used Eastwood's Rust Converter and then Encapsilator. It worked great.

Plastermaster · Post by **Plastermaster** » Mon May 01, 2006 6:49 am

MNAirHead wrote:where do we buy Ospho

Go to the hdwr store and look for Jasco Metal Etch in the paint dept. there are other brands as well. What you are looking for chemicaly is Phsphoric acid. Some of the products also have a rust inhibiter. For more info so a search for "Phosphoric"

Ron

gil · Post by **gil** » Tue Feb 13, 2007 8:43 am

hey there
i am using as anti rust :phosphoric acid as it is
i am using it with a brush locally or for bolts and nuts in a can for over night:simple and great results
i am buying at my....pharmacist for a few bucks in a glass bottle!!!!
gil