Zinc Phosphates

Zinc phosphate coatings for iron and steel are used as oil based corrosion inhibitors. They are also used as a paint base. Attractive black finishes and a corrosion resistant finish is available when sealed with one of EPI’s E-Tec oil based corrosion inhibitors.

• E-Phos 660 — Microcrystalline zinc phosphate by immersion or spray. A calcium modified formulation which produces a fine-grained crystalline coating on iron and steel. Coating weight of 600 mg./sq. ft. It remains fine grained regardless of the cleaning method used prior to application. It is an excellent paint base and the fine-grained, low-porosity coating reduces paint consumption. Parts have some “bare” rust protection, so they do not have to be painted immediately. Liquid concentrate used at 4 to 6% by volume in water at 130° to 180°F. Meets MIL-P-16232 and AMS 2840G.

• E-Phos 662 — Heavy zinc phosphate for steel with a coating weight of 1,500 to 2,500 mg./sq. ft. Meets Mil-P-16232. The absorptive coating is an excellent base for the retention of oils and EPI’s E-Tec rust preventive coatings. Liquid concentrate used at 3 to 4% by volume in water at 190° to 200°F.

• E-Phos 664 — Low temperature heavy zinc phosphate for steel with a coating weight of 1,500+ mg./sq. ft. Operated as low as 140°F with good iron and sludge control. The oil absorptive coating is an excellent base for the retention of the E-Tec rust preventives. Meets Mil-P-16232. Liquid concentrate used at 2 to 4% by volume in water at 140° to 200°F

• E-Prep-B — Black zinc phosphates are produced on steel by using E-Prep-B as a pre-dip prior to zinc phosphating with E-Phos 660, E-Phos 662 and E-Phos 664.

In addition to manganese phosphate, EPI offers iron phosphate and zinc phosphate finishes.

Any unfinished ferrous metal, black oxide, or phosphate finish is not complete without rust prevention and sealant top coat. EPI offers a wide selection of top quality corrosion inhibitors and rust prevention solutions.