DIY Rust Remover Formula

Evapo-Rust Patent #03510432A NONCORROSIVE RUST REMOVER Albert T. Squire

Quote Example 1:

Water 4000 gm. Ammonium citrate 200 gm. Sodium phosphate 40 gm. Sulfuric acid 17 ml. Surfactant (SLS) sodium lauryl sulfate, etc Preservative Agent (sodium benzoate, etc) as anti-mold

No acid huh?

If the PH is less than 7, it is acidic.