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Phosphate Coatings

Phosphating is one of the most functional non-metallic treatments to prevent galling and for break-in lubrication. Phosphate treatments are usually applied to carbon steel, cast iron, and low-alloy steel. Phosphate treatments are formed during a process of chemical conversion. Steel or iron parts are placed in phosphoric acid allowing an acid and metal reaction to occur.

Both manganese and zinc phosphate coatings may be referred to by trade names as “Parkerizing” and “Parco Lubrite.” Both versions have multiple applications in military, firearms, aerospace, and oil and gas industries among others.


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Advanced Technical Finishing