Phosphating · Process-engineered chemistry

UNIKOAT LT700Zinc Phosphate Room Temp

40–60% Energy Savings vs. Heated Process

7–15 g/m²Ambient TempNo HeatingEnergy Saving

01 / Product brief

40–60% Energy Savings vs. Heated Process

Room-temperature zinc phosphating producing medium-to-heavy coatings of 7–15 g/m² at 25–35°C without bath heating. Extended process time compensates for the lower reaction rate at ambient temperature, delivering coating weight and corrosion performance comparable to heated processes on ferrous substrates.

Eliminates steam or electric bath heating — reducing energy consumption 40–60% versus hot-process zinc phosphating on equivalent coating weight. The heavier 7–15 g/m² coat also provides greater standalone corrosion protection for outdoor storage.

02 / Performance

Key process advantages

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

017–15 g/m²

No bath heating required

Eliminates steam or electric heating infrastructure

02Ambient Temp

40–60% lower energy cost

Significant operational savings on heavy-coat applications

03No Heating

7–15 g/m² heavy coat

Superior standalone corrosion protection for outdoor storage

03 / Technical data

Recommended operating window

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

[Zn₃(PO₄)₂ · AMBIENT · 7–15 g/m²]

Steel · Ferrous Metals · Heavy Engineering · Structural Steel

ParameterConventional zinc phosphateUNIKOAT LT700
Operating temperature75–90°C35–45°C
Coating weight300–700 mg/ft²150–500 mg/ft² adjustable
Crystal structureCoarseFine & compact
Sludge formationHighLow
Energy consumptionHighVery low
Water evaporationHighMinimal

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) at room temperature without heating — produces heavy coatings for outdoor corrosion protection.

  1. 01

    Alkaline degreasing

    Remove oil, grease and shop contaminants

  2. 02

    Water rinse

    Remove cleaner residues

  3. 03

    Pickling, if required

    Remove rust, mill scale and oxides

  4. 04

    Water rinse

    Remove acid residues

  5. 05

    UNIKOAT LT 700

    Form the crystalline zinc phosphate coating

  6. 06

    Water rinse

    Remove unreacted phosphating chemicals

  7. 07

    Passivation / final rinse

    Improve corrosion resistance

  8. 08

    Drying

    Remove retained moisture

  9. 09

    Rust preventive oil or paint

    Apply the final protection system

05 / Applications

Specified for real production demands

Typical applications and substrate conditions for UNIKOAT LT700.

Application 01

Energy-cost-sensitive lines eliminating steam or electric bath heating

  • Steel
Application 02

Heavy engineering and structural steel components

  • Ferrous Metals
Application 03

South India facilities where ambient temperature is naturally elevated

  • Heavy Engineering
Application 04

Batch job-shop operations without heating infrastructure

  • Structural Steel

Technical support

Validate UNIKOAT LT700 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.