Widely used as a corrosion-resistant coating agent in metal surface treatments, especially in primers and anti-rust paints. Enhances adhesion between metal substrates and paint layers, improving durability of protective coatings. Commonly found in industrial coatings for automotive, aerospace, and marine applications due to its ability to form stable, insoluble phosphate layers on metal surfaces. Also utilized in ceramic and glass manufacturing as a stabilizing agent, contributing to thermal and chemical resistance. Its low solubility and strong binding properties make it suitable for pigment formulations in high-performance coatings.