Dave,
We have tested the 3V chromium Iridite:
* EMC and safety (for functional compliance with conduction and surface
resistance requirements),
* Coating adherence and 48 hours in salt cabin for environmental
withstanding.
All test passed successfully, so from our point of view the 3VC and 6VC
are equivalent.
However, it seems that the long term reliability of the 3VC is lesser
than the 6VC, because the 6VC has self-heeling property which the 3VC
lacks.
Phil,
As of the marking - I simply stated in the drawing "Iridite by3V
Chromium", and audited my supplier that he understands the requirement
and can perform it. And yes, of course - I kept full traceability of the
paper work from our order through the metal shop to the coating shop.
Ofer Cohen
Quality Manager
Seabridge - a Siemens company
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Tuesday, August 23, 2005 22:24
To: [log in to unmask]
Subject: Re: [LF] Specifying RoHS compliant Irradite
Dave,
So far I am going on the assumption that non-RoHS compliant Irradite and
RoHS compliant Irradite both perform equally for the purpose of the
plating. In our case it looks good and reduces pitting and corrosion in
the aluminum. I don't have much (read any) testing budget, so I'm sort
at the mercy of the platers. Hence, the reason I want a way to "hold
them to their word" at least in print.
Phil
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of David D. Hillman
Sent: Tuesday, August 23, 2005 4:14 PM
To: [log in to unmask]
Subject: Re: [LF] Specifying RoHS compliant Irradite
Hi Phil! As your "cynical brother in soldering" I have a question - " Do
you know that the RoHS compliant Irradite meets the same functional
requirements as the noncompliant Irradite?" Did you conduct any testing
or
are you using supplier data?
Dave Hillman
Rockwell Collins
[log in to unmask]
Phil Nutting
<PNutting@KAISERS
YSTEMS.COM>
To
Sent by: Leadfree [log in to unmask]
<[log in to unmask]
cc
>
Subject
[LF] Specifying RoHS compliant
08/23/2005 02:46 Irradite
PM
Please respond to
"(Leadfree
Electronics
Assembly Forum)"
<[log in to unmask]
>; Please respond
to
Phil Nutting
<PNutting@KAISERS
YSTEMS.COM>
This may be outside our groups purview, but I'll ask it anyway.
For our aluminum chassis sheet metal we have historically used Yellow
Irradiate. The information I'm getting for making this RoHS compliant
is to make sure the plating vendor used trivalent chromium rather than
hexavalent chromium for either clear or yellow irradiate.
It is also my understanding that there are similar "rules" for zinc
plating.
The real question is, how do I specify this on my assembly drawings and
purchase orders?
Am I going to get a true RoHS compliant plating? I can't be the only
person with this issue!
I'm sure I can go into did the plater have a dedicated RoHS plating
tank, is he telling me he complies but in reality he just lies?
Hey, I'm a cynic.
Phil Nutting
Design for Manufacturing Engineer
Kaiser Systems, Inc.
126 Sohier Road
Beverly, MA 01915
voice: 978-922-9300 x1310
fax: 978-922-8374
e-mail: [log in to unmask] <mailto:[log in to unmask]>
www.kaisersystems.com <http://www.kaisersystems.com/>
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