International Standards Corrosion Effect on Copper:
VDA 675-241 - a.o.
The test method for the corrosion effect of elastomers on copper provides information on whether the vulcanizate is uncrosslinked or undercrosslinked and/or contains free sulfur.
In this process, the elastomer is stored with an electrolyte copper sheet under a defined load for a specified time at a specified temperature on a glass plate in a heating cabinet.
The analysis is based on the fact that copper reacts with elemental sulfur to form black copper sulfide CuS. The intensity of the black coloration provides a quick qualitative indication of the free sulfur content.
The evaluation is carried out according to a scale that classifies the corrosion phenomena.
