Simulate Industrial Atmospheric Corrosion to Validate Product Reliability

Sulfur dioxide (SO2) is one of the most common corrosive gases in industrial atmospheres and polluted environments — combined with humidity, it forms sulfurous and sulfuric acid on metal and electronic surfaces, causing corrosion, contact failure, and material degradation. SO2 is often just one of several toxic gases (including H2S, Cl2, and NO2) used together in mixed gas corrosion testing to more realistically simulate real-world industrial atmospheres.

LIB SO2 and mixed gas corrosion testing solutions help manufacturers evaluate how metals, electrical contacts, connectors, and coated components perform under corrosive gas exposure — from connectors and PCBs to metal fittings and industrial equipment — reproducing precise gas concentration, temperature, and humidity conditions to identify corrosion risks before products reach the market.

With accurate gas generation and monitoring technology, customizable test parameters, and complete after-sales support, LIB helps manufacturers worldwide improve product reliability and meet international corrosion testing standards.

SO₂ Gas Corrosion Testing Methods

SO₂ Gas Corrosion Test (Test Kd)

SO₂ gas corrosion testing evaluates the corrosion resistance of electrical contacts, connectors, and electronic components when exposed to sulfur dioxide under controlled humidity conditions.

The test chamber controls:

· SO₂ concentration

· Temperature

· Relative humidity

· Exposure duration

Common standards:

· IEC 60068-2-42 (Test Kd)

Continuous SO₂ Corrosion Test

Continuous SO₂ corrosion testing exposes materials, metal samples, and coated specimens to a constant sulfur dioxide atmosphere for an extended period.

Unlike contact corrosion testing, this method focuses on long-term corrosion behavior and material resistance under sulfur dioxide environments.

Common standards:

· ISO 6988

· ASTM G87

Mixed Flowing Gas (MFG) Corrosion Test

Mixed Flowing Gas corrosion testing evaluates product reliability under low concentrations of multiple corrosive gases commonly found in industrial and indoor environments.

The test combines sulfur-containing and other corrosive gases, such as:

· SO₂

· H₂S

· NO₂

· Cl₂

to simulate complex atmospheric pollution conditions.

Common standards:

· ASTM B845

· EIA-364

· IEC 60068 series

Industrial Atmosphere Corrosion Test

Industrial atmosphere corrosion testing simulates real-world corrosive environments where products are exposed to sulfur dioxide, humidity, temperature variations, and atmospheric pollutants.

Applicable standards:

· ISO 6988

· IEC 60068 series

SO2 Gas Corrosion Testing Equipment Selection Guide

Choosing the correct gas corrosion test chamber depends on: Required gas type and concentration, temperature and humidity requirements, single-gas or mixed-gas testing, sample size, test standard, industry application, and test duration.

LIB provides different gas corrosion simulation chambers to meet various testing requirements.

Key Technical Specifications

Frequently Asked Questions

What equipment is used for SO2 gas corrosion testing? 

SO2 gas corrosion testing is usually performed using a dedicated SO2 gas corrosion test chamber, which precisely controls gas concentration, temperature, and humidity. LIB provides single-gas and mixed-gas corrosion chambers for different testing requirements.

What is the difference between SO2 testing and mixed flowing gas (MFG) testing? 

SO2 testing exposes samples to a single corrosive gas to evaluate a specific corrosion mechanism. Mixed flowing gas testing combines several corrosive gases, such as SO2, H2S, Cl2, and NO2, to more closely simulate complex real-world industrial and urban pollution environments.

Can one chamber perform both SO2 and other gas corrosion tests? 

Yes. LIB mixed flowing gas chambers can perform combined multi-gas corrosion testing, including SO2. However, applications requiring only single-gas SO2 exposure typically use a dedicated SO2 chamber for simpler and more cost-effective testing.

What industries need SO2 gas corrosion testing? 

SO2 gas corrosion testing is widely used in:

· Electronics and telecommunications

· Automotive

· Metal finishing and coatings

· Industrial equipment

· Power and energy

· Aerospace

What warranty and service does LIB provide? 

LIB provides:

· 3-year warranty

· Lifetime maintenance support

· Technical assistance

· Engineering consultation

Need a SO2 Gas Corrosion Testing Solution?

Whether you need SO2 gas corrosion testing, mixed flowing gas testing, or a customized industrial atmosphere corrosion simulation, LIB can provide the right solution.

Our engineers can recommend the most suitable test equipment based on your product requirements, industry standards, and testing objectives.

Contact LIB today to discuss your gas corrosion testing requirements.