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DIN 51353:2021
Testing of insulating oils - Detection of corrosive sulfur - Silver strip test
The silver strip test specified in this document is used for the determination of corrosive sulphur in electrical insulating oils. For the testing a silver strip is immersed for 18 h at a temperature of 100 °C in a sample of the insulating oil to be tested and afterwards checked for discolouring of the surface.
Deutsches Institut für Normung [din]