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02-23-2012, 08:23 AM
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Join Date: Dec 2006
Location: Coventry. England
Posts: 614
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Crankshaft Flange Protection.
Hi,
Simple question I hope.......... what do the experts recommend to prevent corrosion on the crankshaft flange before fitting the flywheel and prop if anything? I am concerned about the dissimilar metals, alum/steal if any moisture gets between them.
__________________
http://www.aerobuilder.blogspot.com
Steve Arnold
England
In completion stage of Loehle P5151
Built and now Flying G.BVLR Vans RV4
Rebuilt G.BDBD Tailwind
Rebuilt G BVTN Kitfox
Built G CDCD RV9A with WAM120
Riveted wings on Glastar G.LEZZ Now (G. SKUA)
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02-23-2012, 10:13 AM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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If your engine is new/fresh, there should be a nice cadmium plating on it. It should be enough protection. It also gives a galvanic buffer between the steel flange and the aluminum flywheel. For sure don't paint the forward face & pilot.
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Actual repeat offender.
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02-23-2012, 10:47 AM
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Join Date: Oct 2005
Location: Vancouver, WA USA
Posts: 908
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Quote:
Originally Posted by aerhed
If your engine is new/fresh, there should be a nice cadmium plating on it. It should be enough protection. It also gives a galvanic buffer between the steel flange and the aluminum flywheel. For sure don't paint the forward face & pilot.
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Same question I have. My clad plating is worn off and I did find a little corrosion on the flange, I cleaned it up using Corrosion-X, there?s no pitting. How can I protect my flange? |
02-23-2012, 11:12 AM
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Join Date: Jan 2005
Posts: 1,024
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Very, very LIGHT, SEE THROUGH coat of zinc chromate primmer.
Good Luck,
Mahlon
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
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02-23-2012, 11:20 AM
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Join Date: Oct 2005
Location: Vancouver, WA USA
Posts: 908
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Quote:
Originally Posted by mahlon_r
Very, very LIGHT, SEE THROUGH coat of zinc chromate primmer.
Good Luck,
Mahlon
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
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Thank you Sir, will do! |
02-23-2012, 11:52 AM
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Join Date: Dec 2006
Location: Coventry. England
Posts: 614
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Thanks
Its an old engine which I had rebuilt a long time ago. I has been pickled and I did the crankshaft AD today and the inside was fine. A little suface rust on the face of the flange easily cleaned off...................so zink chromate it will be.
Thanks Mahlon
__________________
http://www.aerobuilder.blogspot.com
Steve Arnold
England
In completion stage of Loehle P5151
Built and now Flying G.BVLR Vans RV4
Rebuilt G.BDBD Tailwind
Rebuilt G BVTN Kitfox
Built G CDCD RV9A with WAM120
Riveted wings on Glastar G.LEZZ Now (G. SKUA)
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02-24-2012, 02:15 AM
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Join Date: Dec 2006
Location: Coventry. England
Posts: 614
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Mahlon PM sent
Hi Mahlon can you check your PMS.
__________________
http://www.aerobuilder.blogspot.com
Steve Arnold
England
In completion stage of Loehle P5151
Built and now Flying G.BVLR Vans RV4
Rebuilt G.BDBD Tailwind
Rebuilt G BVTN Kitfox
Built G CDCD RV9A with WAM120
Riveted wings on Glastar G.LEZZ Now (G. SKUA)
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02-24-2012, 10:17 AM
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Join Date: Oct 2005
Location: Vancouver, WA USA
Posts: 908
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Zink phosphate?
Quote:
Originally Posted by mahlon_r
Very, very LIGHT, SEE THROUGH coat of zinc chromate primmer.
Good Luck,
Mahlon
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
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My maintenance shop hear on the field says you can?t get Zink Chromate any more but will sell me Zink phosphate. Will this be ok? |
02-24-2012, 10:31 AM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Quote:
Originally Posted by Russ McCutcheon
My maintenance shop hear on the field says you can?t get Zink Chromate any more but will sell me Zink phosphate. Will this be ok?
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I believe this is the real stuff...
http://www.aircraftspruce.com/catalo...mateprimer.php
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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