Manganese Phosphate Coating

Available Across the United States

Also known as Parco Lubrite and Parkerizing, manganese phosphate coatings are formed via immersion in a dilute phosphoric acid solution and are dark gray in appearance. When completed, these coatings prevent galling and improve break-in properties. 

Keystone Corporation’s manganese phosphate coatings are used for a variety of applications, inclusing the production of bearings, bushings, fasteners and other industrial products.

Various Applications for this Coating

Due to its properties, manganese phosphate coatings excel in a wide variety of applications including:

  • Serving as a uniform base for paint adhesion
  • Good non-metallic crystalline coating, ideal for absorbing oil or wax to enhance corrosion protection.
  • Excellent for protecting parts from corrosion or wear
  • Helps metal-to-rubber adhesion

Specifications for Manganese Phosphate Coatings

Keystone Corporation’s manganese phosphate coatings meet numerous commercial and government standards, including the following: 

  • AMS 2481
  • MIL-DTL-16232
  • MIL-P-16232
  • MIL-STD-171 5.3.1
  • TT-C-490
  • Commercial and customer generated specifications


For more than 90 years, Keystone Corporation has assisted customers in completing orders ranging from a few specialized pieces to high volume applications. All finishes are available for both rack and barrel plating applications. We maintain superior quality control through the entire finishing process, ensuring top quality manganese phosphate coating at an affordable cost for any project. Our experienced staff will provide technical assistance as well as Certificates of Compliance to commercial, government, AMS, ASTM, and MIL specifications. Meeting your manufacturing needs is our top priority at Keystone Corporation. Contact us today to receive a personalized quotation based on your specific requirements.

Service Areas:

  • Binghamton, NY
  • Buffalo, NY
  • Chicago, IL
  • Erie, PA
  • Rochester, NY
  • Syracuse, NY
  • And more!

Plated metal parts

 Phosphate Coating


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