Yes, indeed! How many times have we heard those very same words from vendors all over? Steve C -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord Sent: Tuesday, June 11, 2013 9:02 AM To: [log in to unmask] Subject: Re: [TN] Dewetting on high current connector I feel an indication of a sarcasm? On 11 June 2013 11:35, Mike Fenner <[log in to unmask]> wrote: > Yes, but first they have to say: > > Don't understand this we're not doing anything different No one else > has complained This is the first time we ever had this. > > > Mike > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev > Sent: Tuesday, June 11, 2013 12:29 AM > To: [log in to unmask] > Subject: Re: [TN] Dewetting on high current connector > > What else is "new". :-(. I bet the supplier will say something like > "we can ship you a new batch". > Regards, > > Vladimir > > SENTEC Testing Laboratory Inc. > 11 Canadian Road, Unit 7. > Scarborough, ON M1R 5G1 > Tel: (647) 495-8727 > Cell: (416) 899-1882 > www.sentec.ca > > -----Original Message----- > From: Ed Popielarski <[log in to unmask]> > Sender: TechNet <[log in to unmask]> > Date: Mon, 10 Jun 2013 22:45:18 > To: <[log in to unmask]> > Reply-To: TechNet E-Mail Forum <[log in to unmask]>, > Ed Popielarski > <[log in to unmask]> > Subject: Re: [TN] Dewetting on high current connector > > Inge, > > My customer stopped in to examine the suspect components at my request > today. He agreed that the terminals exhibiting dewetting are high risk > for his application, since it is integral with vehicle safety circuitry. > > It was revealed that the terminals in question were manufactured in > (you guessed it) China and the "good" terminals were domestic US. > > I think at this point we shall put this issue to rest until some > critical action becomes imminent. > > 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=0.0 11188,0.033023&ctz=420&t=m&z=16&iwloc=A > > From: Inge Hernefjord [mailto:[log in to unmask]] > Sent: Monday, June 10, 2013 3:20 PM > To: TechNet E-Mail Forum; Ed Popielarski > Subject: Re: [TN] Dewetting on high current connector > > 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]<mailto:[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<tel:360-675-1322> > Fx: 206-624-0965<tel:206-624-0965> > Cl: 949-581-6601<tel:949-581-6601> > > > https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&s > pn=0.0 11188,0.033023&ctz=420&t=m&z=16&iwloc=A > -----Original Message----- > From: Brian Ellis [mailto:[log in to unmask]<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<tel:360-675-1322> > > Fx: 206-624-0965<tel:206-624-0965> > > Cl: 949-581-6601<tel: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]<mailto:[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]<mailto:[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] > ______________________________________________________________________ > > > > ______________________________________________________________________ > 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. 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