Alkaline Cleaners
The Essential First Step for Powder Coating Excellence
Before powder coating, the substrate must be completely free of oils, greases, and contaminants. Alkaline cleaners, typically formulated with sodium or potassium hydroxide and surfactants, are highly effective at removing organic soils such as cutting fluids, stamping oils, and coolants. This critical step ensures proper adhesion, long-term coating performance, and enhanced corrosion resistance.
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How It Works
- Chemical Action: Alkaline solutions saponify oils and emulsify contaminants, lifting them from the surface.
- Surfactants: Keep soils dispersed in the bath, preventing redeposition.
- Process Integration: Often paired with rinsing and sometimes electro-cleaning for thorough preparation.
Typical Multi-Stage Process
- Alkaline Wash: Spray or immersion in heated alkaline solution (pH 9–10) for 90 seconds to 5 minutes.
- Rinses: Multiple water rinses remove loosened soils and alkaline residues.
- Conversion Coating: Acid-based (iron phosphate) or advanced (zirconium) layer for paint bonding.
- Final Rinses: Often with RO/DI water to eliminate mineral deposits and chemical carryover.
Benefits for Powder Coating
- Improved Adhesion
- Enhanced Corrosion Resistance
- Surface Uniformity
Key Considerations
- Process Control: Maintain proper concentration and temperature for consistent results.
- Thorough Rinsing: Prevent alkaline residues from interfering with conversion coatings or powder adhesion.
- Compatibility: Choose cleaners suited to substrate type and subsequent pretreatment steps.
Why PSI Makes the Difference
- Your Trusted Knowledge Source – Expert guidance for process selection and compliance
- Save Valuable Time – Streamlined implementation and technical support
- Reduce Costs – Lower waste treatment and energy consumption
- Empower Better Outcomes – Achieve consistent, high-quality finishes
- Your Single Source – Chemicals, equipment, and expertise in one place
How It Works
- Chemical Action: Alkaline solutions saponify oils and emulsify contaminants, lifting them from the surface.
- Surfactants: Keep soils dispersed in the bath, preventing redeposition.
- Process Integration: Often paired with rinsing and sometimes electro-cleaning for thorough preparation.
Typical Multi-Stage Process
- Alkaline Wash: Spray or immersion in heated alkaline solution (pH 9–10) for 90 seconds to 5 minutes.
- Rinses: Multiple water rinses remove loosened soils and alkaline residues.
- Conversion Coating: Acid-based (iron phosphate) or advanced (zirconium) layer for paint bonding.
- Final Rinses: Often with RO/DI water to eliminate mineral deposits and chemical carryover.
Benefits for Powder Coating
- Improved Adhesion
- Enhanced Corrosion Resistance
- Surface Uniformity
Key Considerations
- Process Control: Maintain proper concentration and temperature for consistent results.
- Thorough Rinsing: Prevent alkaline residues from interfering with conversion coatings or powder adhesion.
- Compatibility: Choose cleaners suited to substrate type and subsequent pretreatment steps.
Why PSI Makes the Difference
- Your Trusted Knowledge Source – Expert guidance for process selection and compliance
- Save Valuable Time – Streamlined implementation and technical support
- Reduce Costs – Lower waste treatment and energy consumption
- Empower Better Outcomes – Achieve consistent, high-quality finishes
- Your Single Source – Chemicals, equipment, and expertise in one place
