I second Glenn’s recommendation and description.  Evapo-Rust is proven, using a compound of phosphoric acid, the chemical used in industry to remove oxidation from steel and prep it for coating(s).

73s,

Bill
AI5RP / KJ5BNE/AE
- - - - - - - - - - - - - - - - - - - - - - 
Bill Blodgett
Arlington, Texas


On Oct 28, 2024, at 8:27 PM, Glenn Little WB4UIV <[email protected]> wrote:

Any acid will remove more than rust.
Evapo-o-Rust will only remove iron oxide, it will not attack the steel below the rust and it is non toxic.
It will remove gun blueing as it is an oxide.
I have used a lot of it and it works very well.
If you soak a rusted toll in it you will probably wind up with black residue that washes off.
This is the carbon that was in the rust.
This is a solution that falls into the too good to be true category.

Glenn
WB4UIV

On 10/28/2024 5:53 PM, sbjohnston--- via Milsurplus wrote:
Several people have told me they use citric acid (purchased as a powder and dissolved in water) to remove rust.  These restorations involve tools and parts being soaked in the citric acid solution for some hours (overnight perhaps).  

The photo and video results have looked quite good.  I imagine the odor is low or pleasant and the toxicity is nil.   Cost seems low too:




Steve WD8DAS  

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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            [email protected]    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
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