That is a VERY difficult problem! You'd like the board to be powered during
this test so you can see how well the coating protected it. Well,
condensation looks simple when your looking at a glass of beer, but that's
not a good model for a powered-up circuit board!

I haven't seen attempts to correlate stuff like conformal coat surface
energy vs droplet size, or the multitude of other parameters which this
would have to contend with.

The best study I saw was with coated unpopulated boards using a nice
consistent test pattern. These were mounted on a thermal plate at a
well-controlled temperature while voltage was applied (the patterns were
inter-digitated traces (can't remember if they used vias too, but i think
not). My recollection is that the setup was placed in a large humidity
chamber maintained at 85% RH (can't go much higher and stay in control).

They were able to see differences between the conformal coats they tried.
But this misses out on all of the other factors due to spray application of
a highly variant surface.

Wayne

On Wed, Nov 22, 2017 at 2:46 PM, Richard Kraszewski <
[log in to unmask]> wrote:

> Other than what is written in IPC CC830 for thermal shock  and MIR testing
> , is anyone away of  any  industry standard that addresses the
> functionality of coating  or devices  when exposed to condensation?
>
> I have looked  at the IP Code for water ingress but all of that water
> testing  seems too invasive & harsh for what I am looking for.
>
> https://en.wikipedia.org/wiki/IP_Code
>
> Something in IEC perhaps.
>
> Rich  Kraszewski
> Senior Staff Process Engineer
> Plexus Engineering Solutions
>
>
> * * * * * * * * CONFIDENTIALITY NOTICE * * * * * * * *
>
> This e-mail and any attachments are confidential from Plexus Corp. and may
> contain information which is privileged, confidential, and/or protected by
> non-disclosure agreements.  They are intended solely for the use of the
> named addressee(s).  .  Any unauthorized use or disclosure may be
> unlawful.  If you are not a named addressee, you must not use, disclose,
> retain or reproduce all or any part of the information contained in this
> e-mail or any attachments If you have received this transmission in error,
> please destroy it and notify us immediately by return e-mail or by calling +
> 1 888 208 9005.
>