Hi Gregg,
With the right removal station, Paralene is actually quite easy to remove.
I've used the station from CCRCO:
http://www.ccrco.com/ccr_bro.pdf
Paralene ranks right up there with acrylic coatings as to ease of removal
with this station. In my experience Silicones and fresh Urethanes are the
toughest, because the removal media just wants to bounce off instead of
cutting and removing the coating.
Paralene is probably the most difficult to apply, and as you probably
already know it takes very expensive and specialized equipment to apply this
coating. There are just a handful of equipment vendors out there. Most
places that I have worked at usually sub'd this out to a service house that
specializes in this coating. There was only one employer that I worked for
that had enough of a customer demand for paralene that justified having the
equipment in-house.
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gregg Owens
Sent: Tuesday, November 22, 2011 1:36 PM
To: [log in to unmask]
Subject: Re: [TN] Spaceflight (NASA) Approved CC
Rigo:
Thanks for the information. We do rework so that will be an issue. Is there
a one-part CC which you have used?
Gregg
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Garcia, Rigo
(GSFC-300.0)[MANTECH SRS TECHNOLOGIES]
Sent: Tuesday, November 22, 2011 10:35 AM
To: [log in to unmask]
Subject: Re: [TN] Spaceflight (NASA) Approved CC
Hi Gregg,
The preferred conformal coating material we use at NASA GSFC is Arathane
5750 A/B. Paraxylene is used on occasion but needs to be applied by vacuum
deposition. Paraxylene provides a thinner, more uniform coverage than
Arathane but is very difficult to remove if part replacement, rework, or
repair is needed.
Rigo
Sr. Quality Assurance Engineer
Workmanship Standards, Code 300
NASA, Goddard Space Flight Center
Greenbelt, MD 20771
Phone. (301) 286-6129
Fax. (301) 286-6576
________________________________________
From: Gregg Owens
[mailto:[log in to unmask]]<mailto:[mailto:[log in to unmask]]>
Sent: Wednesday, November 16, 2011 1:09 PM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: [TN] Spaceflight (NASA) Approved CC
Dear TechNetters:
I have returned to SpaceX and have been posed a question which some of you
should have quick answers for (obviously not a Doug "It depends" question).
What are the NASA approved conformal coatings for spaceflight? I was hoping
to find a list in the NASA-STDs but didn't find a list. Replies are most
appreciated.
Thanks,
Gregg Owens
SpaceX
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