Manganese phosphate coating improves wear resistance, lubricity, break-in protection, and corrosion resistance for steel and iron components.
Functional Protection for Steel & Iron 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.
Applications for Steel & Iron Components
- Gears
- Fasteners
- Threaded components
- Valves
- Engine components
- Sliding and rotating parts
- High-load metal components
- Other industrial parts
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.
- 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 lubricating oil treatment
- MIL-DTL-16232, Type M, Class 3 — Manganese phosphate with no supplementary treatment
- MIL-DTL-16232, Type M, Class 4 — Manganese phosphate chemically converted with an inorganic salt; supplementary treatment or dyeing may be specified
- 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
Additional Specifications
- AAM MS-4035
- Ford WSD-M3P33-A2
- GM GMW15821
- Dana ES-PS-0506
- Dana ES-PS-0507
- Dana ES00010387
All specifications are reviewed against the latest customer drawing, purchase order, revision level, required coating weight, post-treatment requirement, and testing expectations before production. We support specification review for automotive, industrial, OEM, military, and defense applications.
Quality-Focused Processing
Manganese phosphate is a functional surface treatment designed to support part performance, wear resistance, lubrication, and corrosion protection.
Our process includes:
- Customer print and specification review
- Controlled processing and process monitoring
- Coating weight control and verification
- Oil bath or preservative post-treatment requirements
- Lot traceability and 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.
Key Benefits of Manganese Phosphate Coating
- Enhances corrosion resistance
- Reduces friction and wear on moving components
- Improves durability and break-in performance
- Creates a uniform coating with a fine grain structure suitable for precision and close-tolerance components
Production Capabilities for Manganese Phosphate Coating
- Standard baskets 24 x 34 x 28
- Rotators 25L x 24D
- Pin Racks
- Clutch Plate Racks
- 450 Gal Tanks
- Automated processing line with capacity up to 750 lbs per load
Custom Racking Available
Custom racking can be developed to support unique part geometry, handling requirements, and production needs.
Have a Manganese Phosphate Coating Project to Review?
Whether you are developing a new component or evaluating an existing coating process, our team can review your part requirements, specifications, and production needs.