tag:blogger.com,1999:blog-4339813531032979196.post1196005901894177021..comments2024-02-28T07:32:59.864+00:00Comments on HydraRaptor: Fretting corrosionnopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-4339813531032979196.post-71504589898612219892018-01-27T18:26:16.011+00:002018-01-27T18:26:16.011+00:00sorry. yes, delay is a much better word for it tha...sorry. yes, delay is a much better word for it than prevent. nothing stops the failure of a movable contact over a long enough time if there is thermal expansion and vibration.. <br />a bandaid is a bandaid. only a cure is a cure. strain relief is a really good bandaid. gold is also good. <br /><br />in the humid environment where i live, i must periodically remove pcmcia cards with gold plated contacts and push them back in to re-establish reliable contact. on the stepper motor conx (also gold plated) i had to cure the problem- they are now soldered...lol<br />but nothing lasts forever... so cure may not be the best word. the intended meaning is that the element retain integrity long enough to not be the cause of death. <br /><br />garcadhttps://www.blogger.com/profile/11892814788792651844noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-90283856746057131742018-01-20T19:09:30.203+00:002018-01-20T19:09:30.203+00:00no, oil or greases will not prevent fretting corro...no, oil or greases will not prevent fretting corrosion, these "may" delay the failure caused by fretting corrosion.. but if the mated terminal contacts are moving relative to each other .. it will eventually fail. Also, some lubricants make good terminal contact lubes and some DO NOT ... some turn to insulative crud with time/temp ... some cause floating of contacts ... and many do not reduce fretting ... there are purpose made contact lube products for reducing fretting corrosion, but it is really easier, probably cheaper, and certainly more reliable to just strain relive the wiring.<br /><br />(FYI - 30+ years engineering electrical connector solutions for computer & automotive applications)foxkart61https://www.blogger.com/profile/16600639367685956253noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-2034903667766107542018-01-20T19:01:41.810+00:002018-01-20T19:01:41.810+00:00Motion at the mated terminals contact point, cause...Motion at the mated terminals contact point, causes failure eventually in ALL applications! With gold plating first that contact motion wears through the gold, then fretting corrosion starts to occur (gold doesn't oxidize, therefore it can not fret, but it can wear through). Bottomline: <br />> ANY CONTACT MOTION is VERY BAD<br />> Reasonably priced connectors (push-on with/without latch) DO NOT prevent contact motion induced by wire motion<br />> ALL Moving Wiring must be secured, strain relieved before the connectorfoxkart61https://www.blogger.com/profile/16600639367685956253noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-88728318224361297402017-12-23T14:09:31.298+00:002017-12-23T14:09:31.298+00:00a drop of light machine oil will prevent corrosion...a drop of light machine oil will prevent corrosion also<br />grease is commonly applied to any aluminum conx - this is especially formulated for aluminum <br />https://www.homedepot.com/p/Ideal-NOALOX-4-oz-Anti-Oxidant-Compound-30-026/202276208<br /><br />garcadhttps://www.blogger.com/profile/11892814788792651844noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-75094018289627347152017-12-03T11:19:37.151+00:002017-12-03T11:19:37.151+00:00It should be noted that the failure mode in the vi...It should be noted that the failure mode in the video is limited to non-noble contact platings like tin.<br /><br />Gold-plated contacts are not nearly as affected - you'd have to wear through the gold layer for anything bad to happen.CCTSMhttps://www.blogger.com/profile/15270141746665301031noreply@blogger.com