Re: [SergentEng] We got trouble in River City.
Stuck couplers after periods of storage isn't un-prototypical :-)toggle quoted messageShow quoted text
Actually I have had the same problem with newly assembled couplers;
assemble them, break them in (all works fine), come back a few
days later and they are stuck requiring a strong magnet or the flick
(sometimes very hard) of the finger to loosen them. I am at a bit of
a loss to explain why, except that it's winter and quite cold here.
As to the white powder, that indeed is oxidisation, aka rust. The castings are made of Zinc, and the oxide of Zinc is a white powder.
Why you should be getting oxidation that bad I don't know. I wonder if
there could be an impurity in the metal. The only other thing I can
think of is electrolysis (two different metals in contact with each
other can cause corrosion, the casting being Zinc and the metal ball
being Stainless steel?) but I can't imagine it would become that bad
and I think moisture has to be present too for electrolysis to happen.
I think I have some research and reading to do.
Best to you all,
On 29/06/2015 07:35, Mike Van Hove mvanhove@... [SergentEng] wrote: