Performance Evaluation of Materials under Corrosive Conditions Using Sulfur Dioxide Environment Test Chamber (LISUN SQ-010)

Abstract
The Sulfur Dioxide Environment Test Chamber is a specialized corrosion test apparatus designed to simulate the effects of sulfur dioxide (SO2) exposure under controlled environmental conditions. This paper investigates the application of the LISUN SQ-010 Sulfur Dioxide Test Chamber in evaluating the corrosion resistance of materials and protective coatings. The equipment enables accelerated corrosion testing by exposing samples to SO2 gas at specific temperature and humidity settings, replicating real-world deterioration in a shorter timeframe. The study outlines the structure, working principle, applications, and test results using various metal specimens and coated surfaces.

Introduction
In industrial environments, sulfur dioxide is a common corrosive pollutant emitted from combustion processes, especially in urban and heavy industrial areas. The Sulfur Dioxide Environment Test Chamber is vital for assessing the resistance of materials and coatings under such aggressive conditions. This paper explores how the LISUN SQ-010 Sulfur Dioxide Environment Test Chamber facilitates controlled, repeatable testing, enabling accurate predictions of material longevity and coating performance.

Overview of Sulfur Dioxide Environment Test Chamber
The Sulfur Dioxide Environment Test Chamber is engineered to perform corrosion tests by introducing a defined concentration of SO2 gas into a sealed chamber. The LISUN SQ-010 Sulfur Dioxide Environment Test Chamber is a notable model, recognized for its precision control and reliability in laboratory settings.

Specifications of LISUN SQ-010 Sulfur Dioxide Test Chamber:

Parameter	Specification
Model	LISUN SQ-010
Test Volume	108 liters
Temperature Range	Ambient +5°C to 50°C
Humidity Range	85% to 95% RH
SO2 Gas Concentration	0.1% to 0.5% by volume
Interior Material	PVC with anti-corrosive coating
Chamber Construction	Double-layer insulated structure
Control System	Programmable PLC controller

Control System
Programmable PLC controller
Working Principle The test chamber introduces SO2 gas into a humidified and temperature-controlled environment. The exposure cycle subjects test samples to conditions that promote chemical reactions typical of real-world exposure. Over time, corrosion byproducts form on the specimen’s surface, allowing visual, mass loss, and mechanical property evaluations.

Application Areas Sulfur Dioxide Environment Test Chambers are widely used in the following areas:
• Testing corrosion resistance of automotive components.
• Evaluation of protective coatings on metal substrates.
• Comparative analysis of anti-corrosive coating processes.
• Reliability testing for electronic components and PCBs.
• Research and development of corrosion-resistant materials.

Methodology Samples of various metal types (mild steel, stainless steel, copper, and aluminum) and coated variants were prepared and exposed to the SO2 environment. The tests were conducted under identical conditions: temperature of 40°C, 90% RH, and 0.3% SO2 concentration for durations of 24, 48, and 72 hours.

Test Results Summary:

Material Type	Coating	Exposure Time	Corrosion Rate (mg/cm^2/day)	Visual Appearance
Mild Steel	None	24 hrs	12.5	Heavy rust, blistering
Mild Steel	Zinc Plated	48 hrs	4.2	Minor discoloration
Stainless Steel 304	None	72 hrs	0.8	Slight tarnishing
Copper	None	24 hrs	6.3	Verdigris formation
Aluminum	Anodized	48 hrs	2.1	Surface whitening

Discussion
The data highlights the effectiveness of protective coatings in minimizing SO2-induced corrosion. Zinc-plated mild steel and anodized aluminum exhibited significantly lower corrosion rates compared to uncoated counterparts. Stainless steel maintained high resistance throughout the test durations, supporting its suitability for harsh environments. The LISUN SQ-010’s capability to maintain stable environmental conditions was essential in obtaining reliable, reproducible results.
Advantages of LISUN SQ-010 Sulfur Dioxide Environment Test Chamber
• Accurate simulation of SO2 corrosion environments.
• Programmable control for repeatable test cycles.
• Durable and corrosion-resistant construction.
• Compact design suitable for laboratory use.
• Compliance with international testing standards such as ISO 6988 and DIN 50018.

Conclusion
The Sulfur Dioxide Environment Test Chamber, specifically the LISUN SQ-010 Sulfur Dioxide Environment Test Chamber, provides a robust solution for evaluating material performance under SO2 exposure. This tool supports quality control, material research, and process development across industries that demand corrosion resistance. Future studies can expand on multi-gas testing and long-term durability projections to further refine the correlation between accelerated test results and real-world performance.

Tags：SQ-010