Multi-Stage Systems
Multi-Tank Ultrasonic Cleaning Machine - Clean, Rinse and Dry in One Line
A configurable 2-8+ stage system combining rough wash, fine wash, rinsing, treatment and drying around the required cleanliness target.
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LENJEX Solution Center
Passivation & Surface Treatment
Cleaning can be followed by passivation or surface treatment to restore the protective layer of stainless and other metals.
Overview
Where passivation fits
Treatment follows a clean surface.
Machining and handling can disturb the protective chromium-rich layer of stainless steel. Passivation, applied after a clean surface, removes free iron and contaminants and restores corrosion resistance. It is a chemical treatment with controlled time, temperature and rinsing.
A multi-tank ultrasonic system can sequence cleaning, treatment and rinsing, often following rust and oxide removal.
Process Considerations
Treatment decisions
Cleaning is a prerequisite.
Passivation only works on a surface free of oil, grease and particles.
- Ultrasonic degreasing
- Particle removal
- Rinsing
Passivation chemistry and method are chosen for the alloy and specification.
- Citric or nitric treatment
- Alloy-specific process
- Controlled time
Complete rinsing removes treatment chemistry before inspection.
- Multi-stage rinse
- Water quality
- Neutralization
Corrosion testing or inspection and complete drying confirm the result.
- Corrosion test
- Surface inspection
- Drying
Recommended Route
A treatment route
Sequenced after cleaning.
- CleanUltrasonic clean and degrease
- TreatApply passivation chemistry
- RinseRinse thoroughly and neutralize
- DryDry the treated surface
- VerifyVerify corrosion resistance
Related Systems
Equipment for treatment
Multi-stage tanks.
Multi-Tank & Automatic Cleaning Systems
Clean-Rinse-Dry Multi-Stage Ultrasonic System
Compact multi-stage ultrasonic wash, rinse and drying system
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Ultrasonic Components
Immersible Ultrasonic Vibration Plate (Submersible Transducer Pack)
A sealed 600-1200 W stainless transducer module for adding ultrasonic power to existing tanks, custom vessels and multi-stage systems.
View configurationSolution Questions
Planning the application
Yes. Oil, grease and particles must be removed for passivation to be effective; ultrasonic cleaning is a common first stage.
Citric or nitric treatments are common, selected for the alloy and specification; time and temperature are controlled.
Yes. A multi-tank system sequences cleaning, treatment, rinsing and drying in one layout.
Related Solutions
Explore related cleaning problems
Cleaning Solution
Rust & Oxidation Removal
Ultrasonic cleaning removes rust, scale and oxide films using controlled chemistry and cavitation, then rinses and protects the surface.
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Cleaning Solution
Rinsing & Drying Solutions
Rinsing removes detergent and particles, and drying prevents water marks and corrosion, especially in cavities and blind holes.
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Cleaning Solution
Water-Based Ultrasonic Cleaning
Water-based ultrasonic cleaning uses alkaline, neutral or acidic detergents to remove oil, particles and oxides with controlled chemistry.
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