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Lab Methods

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Copper Corrosion

  • Method ASTM D130
  • Repeatability None Established
  • Reproducibility None Established
  • Blending non-linear
  • Additive Correction Yes

Presence of free and corrosive Sulphur in jet fuel, gasoline and kerosene is determined by the copper strip method. This is more of a pass fail test versus an actual quantification of the sulfur. Mercaptans and H2S are the leading causes of failure.

The method is performed by placing a freshly polished copper strip into a test tube containing the sample to be analyzed. It is then sealed in a bomb and placed in a heated bath for 2 to 3 hours. The temperatures vary depending upon upon the product (Gasoline 122°f and Jet fuel 212°f). Once the time has passed the strip is removed from the tube and the corrosion is compared to a classification chart. There are twelve classifications within the rating system of the copper strip. It ranges from 1A to 4C.