Aluminum triphosphate

Aluminum triphosphate (CAS 13939-25-8) is an inorganic aluminum salt; a corrosion-inhibiting pigment and pH buffer in protective coating systems.

Where is Aluminum triphosphate used?

• Anticorrosive primers and industrial coatings: non-toxic corrosion inhibitor
• Steel and aluminum substrates: chromate replacement in compliance-sensitive formulations
• Adhesives and sealants: adhesion to metal surfaces
• Construction materials: substrate protection and durability in cementitious coatings and waterproofing membranes
• Water treatment: buffering agent controlling pH in treatment compounds and mineral-based process chemicals
• It passivates metal substrates and slows electrochemical corrosion without heavy metals such as chromate or zinc phosphate.

Good to know: Performance varies with surface area and purity level for pigment-grade material. Buyers sourcing for coatings applications should confirm compatibility specifications.

Commercial specifications

• Particle size distribution is a key quality parameter
• Compatible with adhesive bases and dry-blended construction formulations