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February 2001

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Subject:
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Sat, 17 Feb 2001 12:34:40 +0200
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Phil

Phil

Generally speaking, the only components that cannot be water washed are
LCD displays. However, relays and other wound components must be
selected as water-washable. Open ones are out, just as much as they
would be with organic solvents. Al-elcons should be sealed types, ditto
PS caps.

No problems with most thermal compounds.

You may have a problem if your closed loop is just DI: this will not
remove the surfactants and other organics, just the ionics. As these
accumulate, expect foaming and deposits on the boards.

Brian
Phil Nutting wrote:
>
> Hi all,
>
> I don't remember if I posted this question in the past months, but I'll
> repost to get a fresh answer.
>
> Are there any components (pth) that can't be washed in an aqueous system?
> Over the years we've had problems with electrolytics, polystyrene bodied
> caps and small board mount relays.
>
> Does anyone have experience with thermal compound or other thermal
> management materials in aqueous clean?
>
> Oh ya, the system I just installed is a closed loop DI water wash with no
> chemicals.
>
> Phil Nutting
> Manufacturing Engineer
> Kaiser Systems, Inc.
> High Voltage Power Supplies That Work(tm)
> 126 Sohier Road
> Beverly, MA 01915
> ph: 978-922-9300
> fx: 978-922-8374
> [log in to unmask]
>
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