Especially software vendors.
Brian
On 11.06.2013 16:16, Steven Creswick wrote:
> 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
>>>
>>>
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