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RE: Substitute for Wax Maskant in Plating



Dina Li wrote:
Greetings! I'm trying to help the Air Force (AF) find an acceptable
substitute for the use of a protective wax in plating and other
metal finishing  operations.  Specifically, jet engine blade repairs
involve injecting wax into the interior of the blade to protect it
during two operations: 1) while the coating is being removed by
acidic stripping, 2) prior to laser drilling to protect the blade
while air holes are being drilled.  After metal finishing, theAF
typically uses perchloroethylene to remove the wax.  In order to meet
the EO 12856 goals, the AF is actively searching for a substitute for
perc that could remove the wax.

Does anyone know of a substitute for the wax that would be
compatible with a  less toxic/hazardous degreaser? The AF has tested
and evaluated dozens of cleaners already (with no success) and is now
looking more closely at physical cleaning methods.  This issue
applies to many engine parts not just the blades I mentioned above.
I've left a message on the National Metal Finishing Resource Center
already and searched EnviroSense.  Thanks and have a good weekend!


Dina Li
Sr. Pollution Prevention Specialist
Science Applications International Corporation (SAIC)
Pollution Prevention Division (MS-4-3)
11251 Roger Bacon Dr, Reston, VA  20190
(703) 318-4603 fax (703) 736-0826 or (703) 709-1044
dina.w.li@cpmx.saic.com

I don't know of wax substitutes but a company here in Maine that   
manufactures jet engine components, and another that manufactures   
semi-conductors, uses the product listed below to remove plating wax.  It   
is non hazardous and they are very satisfied with it.

Bioact 280
Contact:  Steve Hayes, Petroferm, (904) 277 -5229

They could also investigate the use of CO2 snow, or other CO2 methods.   
 One contact I've talked to is:

Dr. Robert Sherman
Applied Surface Technologies
(908) 464-6675


Brian Kavanah
Maine DEP-SBTAP
Staion 17
Augusta, ME 04333
(207) 287-6188
(207) 287-2814 FAX
brian.w.kavanah@state.me.us
 ----------
From:  Dina Li[SMTP:dli@lan828.ehsg.saic.com]
Sent:  Friday, August 01, 1997 10:02 AM
To:  p2tech@great-lakes.net
Subject:  Substitute for Wax Maskant in Plating

Greetings! I'm trying to help the Air Force (AF) find an acceptable
substitute for the use of a protective wax in plating and other
metal finishing  operations.  Specifically, jet engine blade repairs
involve injecting wax into the interior of the blade to protect it
during two operations: 1) while the coating is being removed by
acidic stripping, 2) prior to laser drilling to protect the blade
while air holes are being drilled.  After metal finishing, theAF
typically uses perchloroethylene to remove the wax.  In order to meet
the EO 12856 goals, the AF is actively searching for a substitute for
perc that could remove the wax.

Does anyone know of a substitute for the wax that would be
compatible with a  less toxic/hazardous degreaser? The AF has tested
and evaluated dozens of cleaners already (with no success) and is now
looking more closely at physical cleaning methods.  This issue
applies to many engine parts not just the blades I mentioned above.
I've left a message on the National Metal Finishing Resource Center
already and searched EnviroSense.  Thanks and have a good weekend!


Dina Li
Sr. Pollution Prevention Specialist
Science Applications International Corporation (SAIC)
Pollution Prevention Division (MS-4-3)
11251 Roger Bacon Dr, Reston, VA  20190
(703) 318-4603 fax (703) 736-0826 or (703) 709-1044
dina.w.li@cpmx.saic.com