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IEC 60068-2-43 2nd Edition, May 1, 2003
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Environmental testing – Part 2-43: Tests – Test Kd: Hydrogen sulphide test for contacts and connections
Additional Comments: BILINGUAL * SEE ALSO IEC 60068 SET
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Scope and object

This test:

– is intended to provide accelerated means to assess the effects of the tarnishing of silver and silver alloys used for contacts and connections;

– is particularly suitable for giving information on a comparative basis;

– is not suitable as a general corrosion test, i.e. it may not predict the behaviour of contacts and connections in industrial atmospheres.

NOTE In view of the limited information to be obtained from accelerated corrosion tests, particular attention should be paid to the guidance on this test given in IEC 60068-2-46. Reference should also be made to IEC 60355.

The object of this test is:

a) to determine the influence of atmospheres containing hydrogen sulphide on the contact properties of contacts made of:

– silver or silver alloy;

– silver protected with another layer;

– other metals covered with silver or silver alloy.

b) to check solderless connections made of the same material as in item a) with regard to their tightness or effectiveness.

In all tests, the major criterion of performance will be the change in contact resistance caused by exposure to the test atmosphere containing hydrogen sulphide.