Phosphating · Process-engineered chemistry

UNI-MANGANESE PHOSManganese Phosphate

Oil-Retaining Formula for Anti-Galling Protection

5–30 g/m²80–98°COil RetainingAnti-Galling

01 / Product brief

Oil-Retaining Formula for Anti-Galling Protection

Heavy crystalline manganese phosphating chemistry producing coatings of 5–30 g/m² on ferrous metals at 80–98°C. Yields a dense dark grey-to-black crystal structure with exceptional lubricity and wear resistance. Oil-retaining crystal morphology provides sustained break-in lubrication on sliding and rotating components.

10–30 g/m² coating weight absorbs and retains mineral or synthetic oil between crystal facets, creating a lubricated surface that withstands initial contact pressures during break-in — resisting galling and seizing on precision-fit ferrous surfaces.

02 / Performance

Key process advantages

Product-specific outcomes for production quality, operating control and line performance.

015–30 g/m²

Oil-retaining crystal

Absorbs mineral or synthetic oil for break-in lubrication

0280–98°C

Anti-galling performance

Prevents seizing on precision-fit ferrous surfaces

03Oil Retaining

Heavy 5–30 g/m² coat

Exceptional wear resistance for rotating components

03 / Technical data

Recommended operating window

Final operating conditions should be validated against substrate condition, line configuration and the specified finishing system.

[Mn₃(PO₄)₂ · 80–98°C]

Steel · Ferrous Metals · Gears · Shafts · Railway Components

ParameterRecommended value
Operating Temp80–98°C
Coating Weight5–30 g/m²
pH Range2.5–3.0
Free Acid5–8 points
Total Acid20–28 points

Values are typical guidance. MacroCoats process engineers establish the final bath specification after line trials.

04 / Process position

Where it works in the line

Applied at Stage 5 (Phosphate) in the 9-stage process — creates oil-retaining coating for lubrication and anti-galling on high-contact surfaces.

  1. 01

    Degrease

    Process stage

  2. 02

    Rinse

    Process stage

  3. 03

    De-rust

    Process stage

  4. 04

    Rinse

    Process stage

  5. 05

    Condition

    Process stage

  6. 06

    Phosphate

    Applied at Stage 5 (Phosphate) in the 9-stage process — creates oil-retaining coating for lubrication and anti-galling on high-contact surfaces.

  7. 07

    Passivate

    Process stage

  8. 08

    Rinse

    Process stage

  9. 09

    Dry

    Process stage

05 / Applications

Specified for real production demands

Typical applications and substrate conditions for UNI-MANGANESE PHOS.

Application 01

Gearbox gears, shafts, and synchroniser rings

  • Steel
Application 02

Railway wagon axles, couplings, and bogies

  • Ferrous Metals
Application 03

Military small arms and firearm components

  • Gears
Application 04

Heavy engineering wear surfaces and guides

  • Shafts
Application 05

Engine components — anti-galling on initial start-up

  • Railway Components

Technical support

Validate UNI-MANGANESE PHOS on your line.

Share your substrate, current bath, throughput and finishing system. Our process team will recommend a practical trial window.

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Let's optimise your surface treatment process.

Whether you're scaling a phosphating line, addressing inconsistency across plants, or moving to chromium-free systems — our team is ready to engineer chemistry around your process.