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About This Item
Full Description
This standard determines the ability of insulating materials to produce electrolytic corrosion
on metals being in contact with them under the influence of electric stress, high humidity and
elevated temperature.
The effect of electrolytic corrosion is assessed in one test by using consecutively two
methods:
- visual semi-quantitative method consisting in comparing visually the corrosion appearing
on the anode and cathode metal strips, with those given in the reference figures.
This method consists of the direct visual assessment of the degree of corrosion of two
copper strips, acting as anode and cathode respectively, placed in contact with the tested
insulating material under a d.c. potential difference at specified environmental conditions.
The degree of corrosion is assessed by visually comparing the corrosion marks on the
anode and cathode metal strips with those shown in the reference figures;
- quantitative method, which involves the tensile strength measurement, carried out on the
same anode and cathode metal strips after visual inspection.
An additional quantitative test method for determining electrolytic corrosion, which involves
tensile strength measurement of copper wire, is described in the informative Annex C.