What you are seeing is probably not oxidation but sulfidation. Trace
quantities of SO2 or H2S in the air will cause this. Other than the
aesthetic view, light sulfidation is harmless and reasonable flux
activity should be sufficient to handle it. The best way of prevention
is controlled atmosphere storage.

Brian

"Karnwal, Pankaj" wrote:
>
> Dear all
>
> hello
>
> We are facing a problem that the leads of components getting
> tarnished(oxidized) in store only those which are the silver plated like BNC
> connectors , bridge rectifiers, LED's etc. all are through hole type. The
> humidity  Laval varies 43 to 47 % .Is this is sufficient, Pls. suggest the
> special storage for these components .Is this problem  comes  by defaults ?
>  and any method about the oxidized once re - using  ?. Thanks in advance for
> your any response.
>
> With regards
> Pankaj Karnwal
> Quality  Assurance
> BESL     NOIDA
> PH .91-120-4420394-5 EXTN.211
> e mail : <mailto:[log in to unmask]>
> Barco, innovators in image processing
>
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