International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 60426:2007
Title Electrical insulating materials - Determination of electrolytic corrosion caused by insulating materials - Test methods
Project Number 17181
Abstract/Scope 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. The main changes with respect to the previous edition are listed below: - experience has indicated the need for improved description of the experimental method. It describes a revised procedure for the visual and tensile strength test method that overcomes the limitations of the first edition; - one older method of the first edition has partly been maintained in the informative annex.


Current Stage code 6060
Current Stage code date 2007-02-27
Current Stage code deadline 2007-11-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 112
Reference Document IEC 60426:2007 (EQV)
ICS 17.220.99 - Other standards related to electricity and magnetism
29.035.01 - Insulating materials in general
Keywords Corrosion; Electrolytic; Insulation; Test
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2007-02-27 2007-11-01 export to doc file  EN  DE
5099 2007-02-01 2007-04-01  
5060 2007-01-18 2007-02-01 export to doc file  EN
5020 2006-11-03 2007-01-12  
4099 2006-07-28 2006-11-30  
5060 2006-05-30 2006-06-12 export to doc file  EN
5020 2005-12-23 2006-05-26  

Implementation Dates

date of Ratification (DOR) (1) 2007-02-01
date of Availability (DAV) (2) 2007-02-27
date of Announcement (DOA) (3) 2007-05-01
date of Publication (DOP) (4) 2007-11-01
date of Withdrawal (DOW) (5) 2010-02-01


Superseded by  
Normative reference (6) EN 60068-3-4:2002
EN 60454-2:2007

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.