Moeller’s Zinc Phosphate Primer Spray is a self-etching phosphate primer that is chromate free. It chemically bonds with aluminum and steel to form a corrosion-resistant base coat. It exceeds 800 hours of the 5% salt spray corrosion test and is ideal for spot repair of damaged coatings. Best of all, Moeller’s Zinc Phosphate Primer performs just as well as the zinc chromate of old, so it makes an excellent and safe alternative.