Why It Matters
Pre-paint conversion coatings deposit a crystalline phosphate layer for adhesion and corrosion resistance; design calls for phosphoric acid plus zinc/manganese chemistry
Solution Approach
Pre-paint conversion coatings deposit a crystalline phosphate layer for adhesion and corrosion resistance; design calls for phosphoric acid plus zinc/manganese chemistry RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Treatment Workflow
1
System Assessment
Characterize operating conditions—fluid composition, temperature, pressure, flow rates—and benchmark current treatment performance.
2
Chemistry Selection
Match base chemicals to your operating envelope. Factor in compatibility with existing programs, regulatory constraints, and downstream impacts.
3
Dosage & Delivery
Determine optimal treat rates through jar testing or field trials. Configure packaging (drums, totes, ISO tanks) to match consumption and storage logistics.
4
Monitoring & Adjustment
Track KPIs—coupon rates, residuals, separator performance, water quality. Adjust chemistry and dosage as conditions change.
Recommended Chemistries (3)
Phosphoric acid
CAS 7664-38-2
Acids & Salts
Rust removal and phosphate conversion
1805 (Phosphoric acid, solution) · Class Free phosphoric acid is the acid bath that etches the metal and supplies phosphate ion to grow the conversion-coat crystal layer
Melting Point: 42 °C Boiling Point: > 130 °C at 760 mmHg Density: 1.892 at 25 °C
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Zinc Nitrate
CAS 7779-88-6
Specialty Additives
Conditioning
1514 (ZINC NITRATE) · Class Soluble zinc/nitrate source - nitrate is the standard accelerator/oxidizer and zinc the cation in zinc-phosphate conversion baths
Physical Description: Zinc nitrate is a colorless crystalline solid. … Appearance: White powder Melting Point: 36 °C
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Zinc sulfate heptahydrate
CAS 7446-20-0
Acids & Salts
pH Adjustment
Soluble zinc salt that supplies the Zn2+ deposited as zinc-phosphate (hopeite) crystals on steel; functions as the zinc cation source in the bath rather than as a pH adjuster
Melting Point: 100 °C Density: 1.97 g/cm3 Solubility: Solubility in water, g/100ml at 20 °C: 54
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