Electrical insulating materials at high atmospheric humidity and under the influence of electric stress may cause corrosion of metal parts in contact with them. Electrolytic corrosion is usually determined with insulating materials in contact with copper
IEC 60426:1973 history
2007IEC 60426:2007 Electrical insulating materials - Determination of electrolytic corrosion caused by insulating materials - Test methods
1973IEC 60426:1973 Test methods for determining electrolytic corrosion with insulating materials