Well, Ed, did you get a backlash or do we continue troubleshooting?

Inge


On 10 June 2013 18:53, Ed Popielarski <[log in to unmask]> wrote:

> Brian,
>
> There is no data yet on operational affects.
>
> I was hoping someone would have seen this before and did a study on the
> impact, and/or, an opinion.
>
> Thanks for sharing "It could worry me...". My gut tells me this is
> probably a bad situation, but just how bad is yet to be quantified.
>
> Ed Popielarski
> Engineering Manager
>
>
>                                970 NE 21st Ct.
>                               Oak Harbor, Wa. 98277
>
>                               Ph: 360-675-1322
>                               Fx: 206-624-0965
>                               Cl: 949-581-6601
>
>
> https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
>
> -----Original Message-----
> From: Brian Ellis [mailto:[log in to unmask]]
> Sent: Thursday, June 06, 2013 11:01 PM
> To: TechNet E-Mail Forum; Ed Popielarski
> Subject: Re: [TN] Dewetting on high current connector
>
> OK, what causes dewetting? It is caused by tinning a surface which is
> inherently solderable, but has myriad unsolderable points of small
> diameter. The commonest causes are the implantation of abrasive particles
> in the base metal, co-deposition of organics in a badly controlled plating
> process, gaps caused by epitaxial plating, selective oxidation.
>
> It could worry me, if the contacts in question overheated; have you
> measured a significant temp difference between a dewetting and a
> non-dewetting contacts at full current?
>
> Brian
>
> On 06.06.2013 21:59, Ed Popielarski wrote:
> > Greetings fellow 'netters,
> >
> > I have discovered a dewetting condition on high current blade
> connector(s) which causes me to raise an eyebrow. I can't find any
> scholarly articles discussing the long term effect such an irregular
> surface at the material contact interface (photo located at
> http://stevezeva.homestead.com/Terminal_de-wetting.JPG ) will have on
> connection integrity at high current. This is an extreme environment
> automotive application with MTBF expectations in excess of 10 years.
> >
> > Any guidance and/or professional opinions would be greatly appreciated.
> >
> > As always, thanks to Steve G. for sharing his webspace with us!
> >
> > Ed Popielarski
> > Engineering Manager
> >
> > [Description: FullLogo]
> >                                 970 NE 21st Ct.
> >                                Oak Harbor, Wa. 98277
> >
> >                                Ph: 360-675-1322
> >                                Fx: 206-624-0965
> >                                Cl: 949-581-6601
> >
> > https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&s
> > pn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
> >
> >
> > ______________________________________________________________________
> > This email has been scanned by the Symantec Email Security.cloud service.
> > For more information please contact helpdesk at x2960 or
> > [log in to unmask]
> > ______________________________________________________________________
> >
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________