SSC-010/ SSC-016/ SSC-020
LIB Industry
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Built around a corrosion-resistant glass-fiber-reinforced-plastic workroom and an A3 steel exterior with electrostatic coating, the chamber withstands continuous exposure to SO₂ gas, salt fog, and high humidity without structural degradation. Internal volumes range from roughly 780 L to 1800 L across the SSC-010, SSC-016, and SSC-020 configurations, giving labs flexibility from small-batch component testing to full-assembly evaluation. A programmable color touchscreen controller stores up to 120 programs with 100 steps each, and supports Ethernet/USB connectivity for remote monitoring and unattended long-duration cycles.
Working Principle and Advantages of the ASTM G85 SO₂ Gas Cyclic Corrosion Fog Spray Chamber
1. Coordinated Salt Fog and SO₂ Delivery: An adjustable spray tower with quartz nozzles distributes salt fog evenly at 1–2 ml/80 cm²·h, while a dedicated SO₂ injection and exhaust system maintains gas concentration within tolerance and neutralizes emissions through an NaOH scrubber tank before release.
2. Precision Environmental Control: PT100 Class A temperature sensors and stainless-steel surface-evaporation humidifiers work with the PID controller to keep conditions stable across the full test volume, while a centrifugal fan ensures even air and gas circulation so every sample sees consistent exposure.
3. Sealed, Corrosion-Resistant Construction: Pneumatic double-sealed doors prevent gas and fog leakage during multi-day cycles, and the fiberglass-reinforced interior resists chemical attack from acidic condensate, meaning the equipment itself doesn't become a source of test variability.
4. Layered Safety Protection: Dry-combustion protection, over-temperature and over-current shutdown, water-shortage sensing, and a fail-safe electromagnetic door lock protect both operators and samples during extended, unattended corrosion runs.
5. Flexible Sample Fixturing: A standard rack of 8 round bars and 7 V-shaped grooves accommodates parts of varying geometry, with custom holders available for irregular components, connectors, or coated panels.
Performance Specifications of the ASTM G85 SO₂ Gas Cyclic Corrosion Fog Spray Chamber
Model | SSC-010 | SSC-016 | SSC-020 | |
Internal dimensions (mm) | 800*1450*680 | 1000*1600*800 | 1000*2000*900 | |
Overall dimensions (mm) | 1400*2500*1720 | 1600*2650*1840 | 1600*3050*1940 | |
Interior Volume (L) | 780 | 1280 | 1800 | |
Temperature Range | +10 ℃ ～ +90 ℃ | |||
Temperature Fluctuation | ± 0.5 ℃ | |||
Temperature Deviation | ± 2.0 ℃ | |||
Humidity Range | 30% ~ 98% RH | |||
Humidity Deviation | + 2%, - 3% | |||
Salt Fog Deposition | 1～2ml / 80cm2 · h | |||
SO2 Gas Control | Control and display volume of SO2 gas | |||
Cooling | Cooling system | Mechanical compression refrigeration system | ||
Refrigerating unit | French TECUMSEH compressor | |||
Refrigerant | R404A | |||
Heating Element | Nichrome heater | |||
Humidity | Humidifier | External isolation, stainless steel surface evaporation humidifier | ||
Water Supply System | Water purification system | |||
Air Preheating | Saturated air barrel (31Liter) | |||
Spraying System | Atomizer tower and Spray nozzles | |||
Salt Fog Collected | Fog collector and fog measure cylinder | |||
Sealing | Pneumatic seal | |||
Controller | Programmable color LCD touch screen controller, Ethernet connection, PC Link, USB | |||
Ethernet connection, PC Link | ||||
Sensor | Temperature Sensor | PT100Ω / MV A-class | ||
Humidity Sensor | Dry and wet bulb sensor | |||
External Water Solution Tank(mm) | 340*230*230(18L) | |||
View Window Size(mm) | 800*300 | |||
Air Circulation | Centrifugal wind fan | |||
SO2 Exhaust Device | NAOH tank | |||
Safety Device | Humidifier Dry-combustion Protection; Over-temperature Protection; Over-current Protection; Water Shortage Protection; Earth leakage Protection | |||
Standards and Typical Test Values of the ASTM G85 SO₂ Gas Cyclic Corrosion Fog Spray Chamber
Beyond ASTM G85 and B117, this chamber also supports a range of SO₂-specific and cyclic corrosion test standards, including GM9540P-style cyclic corrosion testing, SAE J2334-related SO₂ variants, ISO 6988, ISO 3231, DIN 50018, JIS Z2382, and GB/T 10125. In these standards, SO₂ concentration is typically kept around 25 ppm, with each cycle running 1–8 hours of gas exposure. This is usually followed by 8–16 hours of humid soak at 40 °C and 95–100% RH, then a period of drying at room or elevated temperature. A full test can run anywhere from 8 cycles to 21 days or longer.
Video of the ASTM G85 SO₂ Gas Cyclic Corrosion Fog Spray Chamber
FAQs on the ASTM G85 SO₂ Gas Cyclic Corrosion Fog Spray Chamber
Q1: Can the equipment run SO₂ testing and neutral salt spray testing without reconfiguration?
Yes. The controller allows operators to switch between SO₂ cyclic programs and standard salt fog programs (e.g., ASTM B117) within the same chamber, since gas injection and salt fog delivery are independently controlled.
Q2: How is residual SO₂ gas handled after each cycle?
Exhaust gas passes through an NaOH neutralization tank before venting, keeping emissions within safe laboratory limits and protecting downstream ductwork from corrosion.
Q3: What is the typical lead time for a custom internal volume or viewing window?
Standard SSC-010/016/020 configurations ship on regular lead times. Custom volumes or optical viewing windows typically add 7–12 days to production, and we coordinate closely to minimize delays.
