corroded coupon
At LCS Laboratory, we specialize in testing acidic and alkaline liquids to evaluate their corrosion rates on metal surfaces. This service is critical for classifying substances under the Globally Harmonized System (GHS) for corrosive liquids, as well as complying with Canada’s Transportation of Dangerous Goods (TDG) regulations.
Purpose of Corrosion Testing
Corrosive liquids can pose significant risks to equipment, containers, and the environment during storage and transport. Determining the rate of metal corrosion helps identify whether a liquid qualifies as “Corrosive to Metals,” ensuring compliance with regulatory requirements and enabling informed decisions for safe handling, transportation, and storage.
Technical Details of the Testing Procedure
Our corrosion testing adheres to the stringent requirements of ASTM G31-72, enhanced with additional GHS-specific protocols:
- Temperature Conditions: The test is performed at 55°C, replicating the maximum temperature that cargo tanks might experience under direct sunlight.
- Test Coupons:
- Reactor 1 (Steel): Three C-1020 steel coupons are tested in distinct positions:
- Fully immersed in the liquid.
- Partially immersed and exposed to air.
- Suspended in air without liquid contact.
- Reactor 2 (Aluminium): Three AL 7075-T6 aluminium coupons are tested in the same configurations.
- Reactor 1 (Steel): Three C-1020 steel coupons are tested in distinct positions:
- Test Duration: This is a 7-day test unless any coupon fully disintegrates earlier, at which point testing is stopped.
- Corrosion Measurements:
- Uniform Corrosion: Reported as the thinning rate in millimetres per year (mm/year) or microns per 7 days
- Pitting Corrosion: Evaluated and reported as the depth of the deepest cavity formed on the coupons.
If any coupon shows a corrosion rate exceeding 6.25 mm/year, the liquid is classified as “Corrosive to Metals.”
Benefits of Our Testing Services
- Regulatory Compliance: Ensure your materials meet GHS and TDG classification standards for safe transportation.
- Comprehensive Analysis: Gain detailed insights into uniform and pitting corrosion, enhancing material safety and container compatibility.
- Reliability: Our testing protocols ensure accuracy, delivering results you can trust for risk assessment and compliance reporting.
- Cost Transparency: Access competitive pricing with a detailed breakdown in our pricing list.
Contact Us
For more information or to request corrosion testing services, email us. Our team is here to support your compliance needs and answer any questions about our extensive range of Dangerous Goods classification tests.
