Functional Protection for Steel Components

Custom Coating offers manganese phosphate conversion coating with oil bath post-treatment for steel and iron components requiring improved wear resistance, lubricity, break-in protection, anti-galling performance, and corrosion support.

Manganese phosphate is a proven functional coating designed to improve the quality and longevity of heavy-duty metal parts. It is ideal for threaded components, valves, fasteners, connectors, engine components, gears, and other parts exposed to sliding, rotating, or high-load contact conditions.

The coating creates a crystalline surface with excellent adherence to steel and iron, helping retain oil for added lubricity and protection. When paired with our oil bath post-treatment, manganese phosphate supports smoother component break-in while helping resist excessive friction, corrosion, and surface wear during handling, storage, and service.

Specifications and Standards

Custom Coating can process manganese phosphate work to applicable customer, print, and purchase order requirements, including specifications commonly associated with manganese phosphate and phosphate conversion coatings such as:

  • MIL-DTL-16232, Type M, Class 1 — Manganese phosphate with supplementary preservative treatment or coating as specified
  • MIL-DTL-16232, Type M, Class 2 — Manganese phosphate with supplementary oil or preservative treatment
  • MIL-DTL-16232, Type M, Class 3 — Manganese phosphate with no supplementary treatment
  • SAE AMS 2481 — Phosphate treatment, anti-chafing, for ferrous alloys
  • MIL-STD-171, Finish 5.3.1 series — Manganese phosphate finishes as referenced by military finishing requirements
  • ASTM B117 — Salt spray testing when required by customer specification
  • ASTM B767 — Coating weight or mass-per-unit-area measurement guidance when applicable
  • Customer-specific automotive, industrial, defense, and OEM phosphate coating requirements

All specifications are reviewed against the latest customer drawing, purchase order, revision level, required coating weight, post-treatment requirement, and testing expectations before production.

Quality-Focused Processing

Custom Coating understands that manganese phosphate is not just a black finish. It is a functional surface treatment tied directly to part performance.

Our team focuses on:

  • Customer print and specification review
  • Controlled processing
  • Coating weight requirements
  • Oil bath or preservative post-treatment requirements
  • Lot traceability
  • Production consistency
  • Customer documentation and quality support

As an ISO 9001:2015 certified coating supplier, Custom Coating supports customers who need dependable processing, responsive communication, and practical production support.

Bonderite M-MN Lubrite 2 Capacities

  • Standard baskets 24 x 34 x 28
  • Rotators 25L x 24D
  • Pin Racks
  • Clutch Plate Racks
  • 450 Gal Tanks
  • Automated line with capacity of 750 lbs per load

Our team can make custom racking at customer request!

Advantages

  • Enhances corrosion resistant
  • Limits wear on moving parts by reducing friction
  • Improves durability and break-in time-period
  • Provides a more uniform coating with smaller grain size for high precision and close tolerance components
Manganese Phosphate Conversion Coatings

Specifications

  • AAM MS-4035
  • Dana ES-PS-0506
  • Dana ES-PS-0507
  • Dana ES00010387
  • Ford WSD-M3P33-A2
  • GM GMW15821
Custom Coating Inc. FAQs

Contact Our Team

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