ECSS-Q-ST-70-20C – Determination of the susceptibility of silver-plated copper wire and cable to “red-plague” corrosion

Scope

This Standard gives details of an accelerated screening test method and acceptance criteria to determine the suitability of silver­plated wire and cable materials for use on spacecraft and associated equipment. The test method, which also determines the suitability of the associated fabrication processes, is based on the work of Anthony and Brown (1965). They established that “red­plague” originates at breaks in the silver­plating of copper wire strands in the presence of moisture and oxygen. The environmental test system artificially promotes “red­plague” corrosion under controlled laboratory conditions as a result of galvanic corrosion of the copper conductor core.

This standard may be tailored for the specific characteristics and constraints of a space project in conformance with ECSS-S-ST-00.

Attachments:

Md5 checksum .doc file = 83696E21411C878E7DEB02223B821D0C
Md5 checksum .pdf file = 79B7A3EF50408056C8644906844D1B56


This Standard cancels and replaces ECSS-Q-70-20A (19 December 2000).