Thank you Bhanu.  This looks to be for stripping paint from planes were
damage to components would not be an issue.  I have to think that to pump
in enough ultrasonic energy to be effective against a conformal coating,
that you would kill most electronic components.

*Douglas Pauls *| Principal Materials and Process Engr | Advanced
Operations Engineering

*COLLINS AEROSPACE*

400 Collins Road NE, MS 108-101, Cedar Rapids, IA  52498  USA

*Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773

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On Wed, May 29, 2019 at 9:06 AM Bhanu Sood <[log in to unmask]> wrote:

> For your reading pleasure, some US Air Force patent applications on the
> topic of ultrasonic removal of coatings and paints:
>
> US4858264A
> Ultrasonic assisted protective coating removal
> Abstract
> A paint or other protective coating removal arrangement involving the use
> of reciprocal motion ultrasonic frequency mechanical energy applied to the
> coating by a variety of tool and abrasive substrate members in the company
> of surface preparation agents such as coolant, heating, softening, and/or
> abrasive agents. The invention is particularly applicable and disclosed in
> terms of protective coating removal from aircraft, such as is often
> necessary for replacement or in the reutilization of aircraft with
> different identification markings. The coating removal arrangement is
> environmentally and human operator safe in comparison with presently used
> coating removal arrangements such as abrasive blasting and chemical solvent
> removal.
>
> US4836858A
> Ultrasonic assisted paint removal method
> Abstract
> A paint or other protective coating removal method involving the use of
> reciprocal motion ultrasonic frequency mechanical energy applied to the
> coating by a variety of tool and abrasive substrate members in the company
> of surface preparation agents such as coolant, heating, softening, and/or
> abrasive agents. The invention is particularly applicable and disclosed in
> terms of, protective coating removal from aircraft such as is often
> necessary for replacement or in the reutilization of aircraft with
> different identification markings. The coating removal method is
> environmentally and human operator safe in comparison with presently used
> coating removal methods such as abrasive blasting and chemical solvent
> removal.
>
> A quick search shows that a similar technique is used for plaque removal by
> dentists and for stain removal in garments.
>
>
> On Wed, May 29, 2019 at 8:55 AM Douglas Pauls <
> [log in to unmask]> wrote:
>
> > Good morning all,
> > I had an odd question that came in recently about the use of ultrasonics
> to
> > strip conformal coating?  I have never heard of such.  Does anyone have
> any
> > experience with this?
> >
> > *Douglas Pauls *| Principal Materials and Process Engr | Advanced
> > Operations Engineering
> >
> > *COLLINS AEROSPACE*
> >
> > 400 Collins Road NE, MS 108-101, Cedar Rapids, IA  52498  USA
> >
> > *Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773
> >
> > [log in to unmask]
> >
> > [log in to unmask] for all Export Compliant Items
> >
>