Phosphating is a conversion coating that is done by the process of immersion into phosphoric acid and phosphate salts to initiate a chemical reaction. The result of this reaction is the forming of a layer consisting of crystalline phosphates (phosphate crystals) on the substrate. Phosphate is most commonly applied to steel substrates, but can also be applied to aluminum, iron, tin, and other ferrous alloys as well. Paramount Metal Finishing is capable of both manganese and zinc phosphating by immersion and offer some of the largest tanks in the industry, measuring 12 by 5 feet for both manganese and zinc applications.

Phosphating coatings have a unique set of properties which make it fitting for many applications in the military, industrial, and automotive markets. While both types (Manganese and Zinc) offer good corrosion resistance and increased durability, manganese also provides optimal wear and friction reduction for moving parts, where zinc is more commonly used as a base for paint or lubricants. However, in order to achieve desirable corrosion resistance for both manganese and zinc applications, alloys must subsequently be oiled or painted.

Paramount Metal current offer Phosphate coatings to TT-C-490 and MIL-DTL-16232 Type M and Type Z.

Please contact our sales team for more information regarding our phosphating capabilities.