Exploring the Power of H2S SO2 Corrosion Noxious Gas Test Chamber

In today's industries-from automotive electronics to aerospace components-ensuring product durability under corrosive atmospheric conditions is critical. Traditional corrosion testing often focuses on salt spray or humidity exposure, but real-world environments contain far more complex and aggressive gases. This is where the LIB H₂S SO₂ Noxious Gas Corrosion Test Chamber becomes essential.

LIB Industry provides a reliable and fully programmable solution for simulating mixed-gas corrosion environments, reproducing real-world damage caused by sulfur dioxide (SO₂), hydrogen sulfide (H₂S), and other reactive gases. Designed for both research laboratories and production QA centers, this chamber delivers precise temperature, humidity, and gas concentration control-all within international testing standards.

What Is H₂S SO₂ Corrosion Noxious Gas Testing?

H₂S and SO₂ corrosion testing is a method used to evaluate a product's resistance to toxic gases commonly found in industrial, automotive, and urban environments. These gases, when combined with humidity and temperature variations, can accelerate corrosion in metals, coatings, connectors, and circuit boards.

The testing process simulates how materials degrade when exposed to polluted air or exhaust emissions. Through controlled concentration levels-typically 25 ± 5 ppm of SO₂-and stable environmental parameters (15 °C ~ 80 °C temperature, 30 % ~ 98 % RH humidity), engineers can predict a product's lifespan and corrosion rate.

Testing in accordance with IEC 60068-2-42 and other related standards ensures globally comparable results, providing strong validation before product certification or release. This procedure is essential for verifying product reliability in fields such as electronics, aerospace, automotive, and coatings.

Strengths of LIB H₂S SO₂ Corrosion Noxious Gas Test Chamber

Precise Control & Repeatability
LIB's chamber maintains temperature within ± 0.5 °C, humidity within ± 1 % RH, and SO₂ concentration at 25 ± 5 ppm. A PT100 Class A platinum resistance sensor (accuracy 0.001 °C) ensures consistent readings, while centrifugal air circulation maintains uniform gas distribution throughout the workspace.

Robust Environmental Range

Durable Materials & Safety Design
The interior is constructed from SUS304 stainless steel, while polyurethane foam insulation prevents heat loss. The chamber's electromagnetic lock and silicone sealing system ensure airtight safety. Built-in protections include over-temperature, over-current, high-pressure, and water-shortage safeguards-ensuring safe, uninterrupted operation.

User-Friendly Interface
A programmable color LCD touchscreen controller supports Ethernet connection and USB data transfer. Users can configure test profiles, monitor parameters in real time, and export test reports directly-streamlining compliance documentation.

Energy Efficiency & Low Maintenance
The silent-discharge gas generator and external stainless-steel humidifier improve operational stability while minimizing energy use. Components are designed for easy maintenance, ensuring long-term reliability with minimal downtime.

LIB Noxious Gas Chamber Advantages in Accurate Multi-Gas Simulation

The LIB Mixed Flow Noxious Gas Test Chamber provides a precise and controllable environment for single-gas or multi-gas corrosion testing, supporting SO₂, H₂S, NO₂, and NH₃ exposure individually or in customized combinations. This flexibility allows engineers to simulate complex, real-world atmospheric corrosion effects that occur in automotive, aerospace, and electronic industries.

Each gas concentration can be finely adjusted -
SO₂: 1–35 ppm, H₂S: 10–30 ppm, NO₂: 10–100 ppm, and NH₃: 1000–2000 ppm,
with an error margin below 10 %. The chamber maintains a stable temperature range of +15 °C ~ +80 °C and humidity range of 30 % ~ 98 % RH, perfectly aligned with IEC 60068-2-42 and related international corrosion test standards.

To ensure consistent precision, the system integrates a PID-controlled PT100 Class A sensor (accuracy ± 0.001 °C) and a dry-wet bulb humidity sensor, guaranteeing temperature fluctuation within ± 0.5 °C and humidity deviation within ± 2 % RH. The French TECUMSEH compressor and Nichrome heater jointly deliver stable thermal cycles for long-term exposure.

Safety is reinforced by a dual-tank exhaust system:

Tank 1 (NaOH solution) neutralizes and absorbs acidic gases such as SO₂, H₂S, and NO₂.

Tank 2 (dilute H₂SO₄ solution) absorbs alkaline gases like NH₃, keeping the workplace clean and compliant with EU safety limits (≤ 50 ppm).

The controller features a programmable color touch screen with Ethernet and USB ports for real-time monitoring, data export, and remote operation. The electromagnetic safety lock ensures a gas-tight seal during operation and can only be unlocked from the controller to prevent accidental opening.

Applications include:

Electronic connectors and circuit boards: Detecting early-stage corrosion and conductivity loss caused by mixed pollutants.

Automotive and aerospace components: Evaluating coating performance, seal integrity, and long-term material fatigue under mixed-gas stress.

Paints, plating, and protective films: Testing resistance to industrial or urban air pollution with precise multi-gas exposure.

With its high-accuracy sensors, dual exhaust treatment, and customizable test profiles, the LIB Mixed Flow Noxious Gas Chamber delivers an industry-leading combination of accuracy, safety, and environmental responsibility, ensuring reproducible results and full compliance with global testing standards.

FAQs on LIB Noxious Gas Chamber

Q1: May I ask how the SO₂ Noxious Gas Corrosion Test Chamber prevents gas leakage? Is there any alarm or warning system?
Since sulfur dioxide is a toxic gas, preventing leakage is critical. The chamber uses a dual-side concave-convex sealing door design to ensure airtightness. Each unit undergoes a strict factory pressure test-3 kg of air is injected into the sealed chamber, and any moisture leakage indicates a failed seal. Therefore, the equipment itself does not include an alarm or warning system. However, for enhanced safety, it is recommended to install the chamber inside an independent, sealed laboratory room if conditions allow.

Q2: May I ask, during the exhaust process of the SO₂ Noxious Gas Corrosion Test Chamber, how can we ensure that all gas is completely discharged? Will any gas be left behind?
In accordance with EU safety standards (≤ 50 ppm), the chamber is equipped with an SO₂ sensor that continuously monitors residual gas concentration in real time. The exhaust process typically takes around 30 minutes to ensure complete gas removal. Additionally, the built-in 10 % sodium hydroxide (NaOH) tank neutralizes and absorbs the discharged gas, minimizing residue and ensuring operational safety.

Q3: May I ask what is the service life of the SO₂ Noxious Gas Corrosion Test Chamber, and what regular maintenance is required?
The chamber is designed for a service life of up to 15 years, maintaining stable and reliable performance under long-term use. To ensure measurement accuracy and safety, the SO₂ probe should be calibrated annually by a certified third party, and both the ozone generator and probe should be replaced every three years. Following these maintenance guidelines allows the chamber to continuously provide precise and consistent testing conditions.

Q4: May I ask what are the maintenance costs for the SO₂ Noxious Gas Corrosion Test Chamber, and can LIB provide related services?
Routine maintenance mainly includes:

• Annual calibration of the SO₂ probe (can be sent back to LIB for service).
• Sensor replacement every three years to maintain accuracy.
• NaOH solution replacement every six months to ensure proper gas absorption.

LIB offers complete calibration, replacement, and technical support services to ensure your system operates safely and efficiently for years.

Q5: May I ask whether it is possible to equip an independent gas treatment device? Is this device corrosion-resistant and CE compliant?
Yes. The SO₂ chamber includes a standard 10 % sodium hydroxide absorption unit for gas neutralization. This treatment system is corrosion-resistant, designed in-house by LIB, and fully CE-compliant, meeting international safety and environmental protection standards.

Contact LIB Industry today to learn how our H₂S SO₂ Noxious Gas Corrosion Test Chamber can enhance your lab's testing precision, ensure international compliance, and reduce operational risk-all with world-class after-sales support and ISO 17025-certified calibration services.