Manganese Phosphate Coatings

Calico offers CT-16, a Black Manganese Phosphate coating that is widely popular for its anti-corrosion and outstanding wear resistance properties. Calico's Manganese Phosphate application process, also known as Parkerizing, reduces friction and resists corrosion to ultimately provide a coating solution that protects ferrous metal component surfaces. In contrast to other coatings, Manganese Phosphate can offer continuous protection to parts subject to wear even after the initial break-in period. This is why Manganese Phosphate is tremendously useful for projects that require parts to slide against each other, such as engines and transmissions.

Phosphate produces a fine, dense crystalline coating that can be applied to virtually any ferrous metal component (sub-sea parts, tubular goods, threaded components, valves, fasteners, connectors, etc.). Calico's Manganese Phosphate break-in lubricant coating is especially effective where it is desirable to reduce friction, galling, and scoring on ferrous compounds.

Manganese phosphate is used to improve the functionality of threaded components, valves, fasteners, connectors, engines, gears, etc. providing reduced friction, corrosion resistance and wear resistance.

Meets MIL-DTL-16232H (updated from MIL-DTL-16232G)M


  • Corrosion Protection
  • Reduced Friction
  • Reduced Light Reflection
  • High Hardness
  • Good Appearance
  • Reduced Wear of Sliding Parts
  • Optimum Torque-Tension Requirements
  • Base Coat for Dry Film Lubricants
  • Excellent Anchor Properties
  • Lubrication During Cold Form
Calico Manganese Phosphate Coatings

Calico Manganese Phosphate Coatings

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The Calico Process:

Black Manganese Phosphate is applied via immersion into a concentrated, heated bath. The surface of the metal is chemically converted to an integral protective layer of insoluble phosphate crystals. Some components and/or materials may require blasting with abrasive media to provide uniform coating thickness and appearance.

Steps to Manganese Phosphate:

Step 1: Degreasing/Cleaning
Step 2: Water rinses
Step 3: Surface preparation for treatment
Step 4: Activation
Step 5: Manganese Phosphate
Step 6: Optional oils

Scroll Table For More Info

Commercial Name Substrate(s) Process Temp. Thickness (mil) Color(s)
CT-16 Black Manganese Phosphate Coating Steel 205°(96°C) 0.2 – 0.4 Black & Dark Gray More
CT-17 Black Manganese Phosphate and Oil Coating Steel 205°(96°C) 0.2 – 0.4 Black & Dark Gray More