In message <[email protected]>, dated Fri, 16 Jun 2006, Peter Tarver <[email protected]> writes
>It is not the pop rivet, per se, that conducts the fault current, but >the joined metal sheets. The pop rivet simply maintains intimate >contact between two conductive materials. The same is generally true >of screws. After a year or so in a polluted atmosphere, the aluminium sheets won't be in good contact any more. > >Rivets can be quite reliable and have been used in electrical equipment >for many moons. Aluminium pop-rivets have a steel pin inside, which, in a salty atmosphere, can make them corrode rather swiftly due to electrochemical effects. Chromate-passivated pins used to be available, which were better, but they've fallen under the RoHS Directive in Europe. I don't know whether there is any replacement. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
