The copper strip corrosion test evaluates the corrosive tendency of certain petroleum products toward copper under controlled test conditions. It is especially useful as a quality-control indicator for sulfur-containing or reactive components.
What the result tells you
After exposure, the copper strip is compared with standardized corrosion classifications. A darker or tarnished strip does not automatically mean the same chemical cause in every sample; interpretation must follow the applicable method and product specification.
Good laboratory practice
- Use a clean, correctly prepared copper strip.
- Avoid contamination during handling.
- Control the test temperature and exposure time.
- Record the rating together with the sample and method revision.