Azure Phosphoric Acid Descaler Rust Remover 30% Safe On Metal Surfaces – 25L


Out of stock

 Phosphoric Acid Descaler Rust Remover 30% Safe On Metal Surfaces – 25L


  • This phosphoric acid removes RUST.
  • Safe on metal surfaces including stainless steel and will not cause “flash rusting” when used for etching concrete.
  • Phosphoric acid may be used to remove rust by direct application to rusted iron, steel tools, or other surfaces.
  • The phosphoric acid changes the reddish-brown iron oxide.
  • Multiple applications of phosphoric acid may be required to remove all rust.
  • Other applications:
  • Among many applications, phosphoric acid is used:
  • As a solution for anodizing
  • As an external standard for phosphorus-31 Nuclear magnetic resonance (NMR).
  • As a buffer agent in biology and chemistry; For example, a buffer for high-performance liquid chromatography.
  • As a chemical oxidizing agent for activated carbon production, as used in the Wentworth Process.[15]
  • As the electrolyte in phosphoric acid fuel cells.
  • With distilled water (2–3 drops per gallon) as an electrolyte in oxyhydrogen generators.
  • As a catalyst in the hydration of alkenes to produce alcohols, predominantly ethanol.
  • As an electrolyte in copper electropolishing for burr removal and circuit board planarization.
  • As a flux by hobbyists (such as model railroaders) as an aid to soldering.
  • In compound semiconductor processing, phosphoric acid is a common wet etching agent: for example, in combination with hydrogen peroxide and water it is used to etch InGaAs selective to InP.[16]
  • Heated in microfabrication to etch silicon nitride (Si3N4). It is highly selective in etching Si3N4 instead of SiO2, silicon dioxide.[17]
  • As a cleaner by construction trades to remove mineral deposits, cementitious smears, and hard water stains.
  • As a chelant in some household cleaners aimed at similar cleaning tasks.
  • In hydroponics pH solutions to lower the pH of nutrient solutions. While other types of acids can be used, phosphorus is a nutrient used by plants, especially during flowering, making phosphoric acid particularly desirable.
  • As a pH adjuster in cosmetics and skin-care products.[18]
  • As a dispersing agent in detergents and leather treatment.
  • As an additive to stabilize acidic aqueous solutions within a wanted and specified pH range.
  • As a sanitizing agent in the dairy, food, and brewing industries


Direction for use – 

  • Always dilute product with water before use.
  • Dilute with up to 5 parts water depending on the degree of scale to be removed.
  • Rinse thoroughly with clean water after descaling is complete.

Out of stock

SKU: VC-1VC260-25

Additional information

Weight25 kg
Size (L)


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