It is a Nickel activated heavy immersion Zinc Phosphating system. A single additive package that provides a uniform porous deposit. It is designed for fasteners, nuts, bolts, automotive components, pulleys, hinges, oil field equipment, and other types of assemblies. Z52 produces a high quality, tight coating and meets all automotive and military specifications. Dense coating in the range of 2000-3000 mg/ft2. It meets Class A2 of 1S:3618-1966.