DIN EN 1965-2:2011-07

This European Standard describes a method to determine the ability of an adhesive to corrode a brass substrate under the influence of an applied voltage and high humidity. The temperature, humidity, ageing period and applied voltage are chosen to ensure the maximum differentiation between the corrosivity of different adhesives and are not intended to represent any particular service condition. Two brass electrodes are held in contact with a flat sample of the cured adhesive. This assembly is placed in an environment with a relative humidity of 92 % at 42 °C and a direct current voltage of 100 V is applied for four days. Following this the brass surface is examined and the extent of the tarnishing and/or corrosion assessed on the basis of discolouration. The test standard is directed at the manufacturers and users of structural adhesives and test laboratories. The Committee responsible for this standard is NA 062-04-55 AA "Prüfung von Konstruktionsklebstoffen, -klebverbindungen und Kernverbunden" ("Testing of structural adhesives, structural adhesive bondings and sandwiches") at DIN.