Salt spray machine
The salt spray machine—also known as a salt fog tester—simulates aggressive corrosive environments (sea air, acid rain) to rapidly assess the durability of surface treatments on metals, plastics, and composites. It accelerates real-world corrosion to help R&D and quality assurance teams validate material formulations, optimize processes, and ensure product longevity.
Applicable Standards
• ISO 9227 – Salt Spray Testing Method
• ASTM B117 – Standard Practice for Operating Salt Spray (Fog) Apparatus
• JIS Z 2371 – Salt Spray Corrosion Testing
• GB/T 10125 – Salt Spray Test Method
Technical Specifications
• Chamber Internal Size: 600×450×400 mm (W×D×H)
• External Dimensions: 1 070×600×1 180 mm (W×D×H)
• Salt Solution: 500 g NaCl in 9.5 L deionized water
• Temperature Control:
– Test Chamber: 35 °C ±1 °C (≤±0.5 °C fluctuation; ≤2 °C uniformity)
– Solution Tank: 47 °C ±1 °C
– Vaporizer/Heater: 63 °C ±1 °C
• Spray Rate: 1–2 mL/80 cm²·h (adjustable)
• Compressed Air: 0.3–0.6 MPa, filtered and dried
• Power Supply: 220 V±10%, 50 Hz, 2 kW
• Protection Rating: IP54 (optional IP65)
Key Components
• Chamber & Lid: Corrosion-resistant PP or stainless steel with smooth interior for easy cleaning.
• Viewing Window: ≥8 mm tempered glass for safe observation under high humidity.
• Heating Elements: U-shaped pure titanium tubes, acid & alkali resistant for long service life.
• Nozzles: Precision glass or ceramic spray nozzles for fine, uniform fog.
• Agitation: Magnetic or mechanical stirrer in solution tank to keep the salt mix homogeneous.
• Temperature Control: PID controller with PT100 platinum sensor for precise regulation.
• User Interface: Color touch-screen PLC allows programmable test cycles, time, and logging.
• Water-Level Safety: Electrode or optical sensors to auto-stop when water is low, preventing dry heating.
• Spray Tower: Multi-stage dispersion ensures 360° conical fog distribution.
• Exhaust & Filtration: Activated carbon filter or condensers to treat exhaust, meeting environmental standards.
Features & Functions
• Test Modes: Continuous salt spray, cyclic (salt spray/dry/condensation), custom programmable cycles.
• Data Logging: USB port for exporting temperature, humidity, spray rate, and runtime logs.
• Self-Diagnostics: Automatic calibration of temperature/humidity sensors and nozzle flow checks.
• Protections: Over-temperature, water shortage, air pressure anomaly, and leakage detection.
• Easy Maintenance: Hinged chamber, quick-release nozzles, and heating elements for fast service.
• Consumable Savings: Optional internal water recirculation to minimize salt solution waste.
• Low Noise: Sound-damped enclosure, operating noise ≤65 dB(A).
Operating Procedure
Prepare and fill salt solution; start agitation.
Program test cycle (temperature, spray rate, duration, cycle pattern).
Preheat until stable, then initiate spray and timer.
Monitor specimens periodically; record corrosion grades per relevant standard.
After test completion, stop spray and heating; ventilate chamber to ambient temperature.
Drain and clean chamber, nozzles, and plumbing; perform routine maintenance.
Typical Applications
• Electronics: PCBs, connectors, and moisture-sensitive components.
• Coatings & Chemicals: Paints, powder coatings, anodized surfaces.
• Hardware & Machinery: Fasteners, valves, pumps, and metal parts.
• Automotive: Body panels, lighting fixtures, underbody protection.
• Aerospace: Alloy parts, coating integrity for aircraft hardware.
• Research & Education: Material science studies, metallurgical labs, teaching demos.
Selection & After-Sales Service
• Choose chamber size and test modes based on sample dimensions and standards.
• Decide on cyclic testing, humidity control, or advanced data acquisition modules.
• Certifications available: CE, RoHS, UL, GB.
• Warranty & Support: One-year full warranty; lifetime technical support and spare parts supply.
• Training & Consulting: Free remote setup guidance, on-site commissioning, and test protocol development.
Salt spray testing is an essential tool for product qualification, failure analysis, and material development. Our salt spray machine delivers precision, reliability, and flexibility to meet diverse corrosion-testing needs across industries.