Phosphoric acid
Phosphoric acid at 75% concentration, also called hydrogen phosphate, is a chemical product primarily used for metal surface treatment. It is used for rust removal, pickling and phosphating. Rust removal corresponds to the elimination of corrosion, and pickling to the creation of a slight roughness on the metal, to create adhesion before painting. Phosphating refers to the operation of treating steel by phosphoric acid bath, for the purpose of passivating the metal. The formation of iron phosphate on the surface creates protection against air and therefore against corrosion. Paint adhesion is improved.
MAIN FUNCTIONS
75% phosphoric acid is a mineral acid used to:
- Descale
- Strip, pickle
- Remove rust from metal parts
- Phosphate metal parts to improve paint adhesion and corrosion resistance
INDUSTRIAL USE
Phosphoric acid is used in phosphating baths for all types of surface treatment. It has a dual action: it removes rust and creates protection against corrosion.
PROFESSIONAL USE
Phosphoric acid is used for rust removal, pickling, preparation before painting, particularly for restoring bodywork on vintage vehicles. It is also used before applying a metal protection solution.
USAGE INSTRUCTIONS
Adjust the product dilution according to the intended use.
For rust removal: dilute 10% phosphoric acid with 90% demineralized water. For phosphating: dilute 20% phosphoric acid with 80% demineralized water heated between 60 and 80°C.
For cleaning metals before painting, use our phosphating degreaser. Thanks to its wetting action, the product acts uniformly, without immersion bath.
It is not recommended to use phosphoric acid on thin sheets or thin steel. Use a rust converter instead.
Also consult the oxalic acid page for metal treatment.
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