mikesndbs Posted July 31, 2014 Share Posted July 31, 2014 Hi I am really upset about this. Some years back my Wrenn ringfield motor magnets were dreadfully weak and at that time it was suggested I buy Super Neo magnets for them. I did this and found them very good if a little too strong to be handled. On the back of this success I replaced most of my Hornby X03/4 motor magnets and Train EMU/DMU motor bogie magnets. I went to run my Wrenn 8F tonight but it just stuck fast. On inspection I discovered that all the silver plating of its magnet had come off! See pic. I have emailed http://www.superneomagnets.co.uk/ but the mail bounced back. Really gutted about this and scared it will now happen to all the magnets. Anyone else had this, what are the options for stable magnets for these old motors? Thanks Pic never attached. Link to post Share on other sites More sharing options...
JeremyC Posted July 31, 2014 Share Posted July 31, 2014 Have you tried the phone number given on the website? [in case you're wondering it's an Edinburgh number] Jeremy Link to post Share on other sites More sharing options...
mikesndbs Posted July 31, 2014 Author Share Posted July 31, 2014 Hi, Jeremy, no bit late just now. I'll give it a go tomorrow. Link to post Share on other sites More sharing options...
mikesndbs Posted August 1, 2014 Author Share Posted August 1, 2014 Hi, just had a reply from Super Neo, having also used their on line contact form. Can't say fairer than this and I am pleased he has not seen this problem before! Neodimium is extremely susceptible to attracting moisture / dampness and will rust.Under such conditions it may be possible that the protective plating could peel.It may be that the plating on this magnet was chipped or cracked and moisture has crept in.Will send replacement Ringfield Magnet tomorrow.RegardsAllister. Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted August 1, 2014 Share Posted August 1, 2014 Interesting. Electroplatings are rarely 'perfect' in terms of achieving a complete barrier on the plated object, unless made under very carefully controlled conditions. Suggests to me that storage in low relative humidity might be a good plan to minimise the chance of occurence of this type of problem. Link to post Share on other sites More sharing options...
naugytrax Posted August 1, 2014 Share Posted August 1, 2014 I don't believe that the "silver plating" is important to the magnetic properties. I think it's just there to protect the magnet during handling, and once the magnet is installed it doesn't matter if the coating flakes off. The wife uses little Neo magnets, with various ornaments glued on, to fix notes and such to the referigerator. These are always coming to me for repair because the glue pulls the coating off so the ornament is detached. I just scrape off what's left of the silvery film and glue directly to the magnetic material. After repair, they work fine. Link to post Share on other sites More sharing options...
Il Grifone Posted August 1, 2014 Share Posted August 1, 2014 The plating is probably only to make it look 'pretty' (you can get them gold plated) - I would happily scrape it off and refit the magnet - possibly with a coat of black paint. Link to post Share on other sites More sharing options...
Fat Controller Posted August 1, 2014 Share Posted August 1, 2014 You've probably done so, but it might just be worth checking around the chassis to see if there are any stray bits of plating lurking around the place. Link to post Share on other sites More sharing options...
mikesndbs Posted August 1, 2014 Author Share Posted August 1, 2014 Hi, thanks for all the replies and suggestions The company is sending me a new magnet free of charge as they say the original must have had a defect in it. Very happy with that as it was around 2003 that I purchased them. The flakes of plating originally caused the motor to lock solid, I have removed what I can but will check again once the new one arrives. I like the idea of black paint! Link to post Share on other sites More sharing options...
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