What happened here?

https://ibb.co/JpGyTwH

This is a Rhodium connector. Pulled the plug out to rewire and this looks like brown dust in one side of the plug. Rust?

tom201506-05-2021 7:45pm

brunomarcs Details Discussions Posts This discussion Message User 308 posts 06-05-2021 at 09:28pm Copy Comment URL Report Comment Edit Delete rust on a rhodium plug is a bad thing. Surely it didn't get wet!
ozzy Details Discussions Posts This discussion Message User 7,648 posts 06-05-2021 at 09:40pm Copy Comment URL Report Comment Edit Delete It looks to me to be copper. ozzy
russ69 Details Discussions Posts This discussion Message User 3,579 posts 06-05-2021 at 10:26pm Copy Comment URL Report Comment Edit Delete Yup, the copper underplate.
oldhvymec Details Discussions Posts This discussion 5,101 posts 06-05-2021 at 10:55pm Copy Comment URL Report Comment Edit Delete It looks like the copper is coming off the parent metal on the left and the rhodium clad is holding up on the SAME parent metal on the right. Brass, iron, nickel they electro plate it with what ever YOU’LL buy.. Just a cheap knock off, with a bad plating job. NO they both didn’t start out rhodium plated, just the one on the right.. Regards
tom2015 OP Details Discussions Posts This discussion Message User 105 posts 06-05-2021 at 11:12pm Copy Comment URL Report Comment Edit Delete The Viborg connectors are Rhodium over copper. (Cerious Matrix). It probably is the copper, strange how it was able to pulverize like that from underneath the Rhodium coating.