---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Sun 07/13/14: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:28 AM - Rusty RV-8 Steel Parts (Matt Dralle) 2. 01:27 PM - Re: Rusty RV-8 Steel Parts (vanremog@aol.com) 3. 04:02 PM - Re: Rusty RV-8 Steel Parts (HCRV6@comcast.net) ________________________________ Message 1 _____________________________________ Time: 11:28:27 AM PST US From: Matt Dralle Subject: RV-List: Rusty RV-8 Steel Parts I sent this email to Van's today. Something to watch out for... >Date: Sun, 13 Jul 2014 11:23:02 -0700 >To: support@vansaircraft.com >From: Matt Dralle >Subject: Rusty RV-8 Steel Parts > > >Dear Van's, > >I am stripping all of the steel parts on my RV-8 to have them re-powder coated in a textured black to match the rest of my interior. While stripping, I have noticed a couple of things regarding factory powder coating. Perhaps the most disturbing was the high build up rust under parts in certain areas, primarily the ones made from the 4130 plate (see attached pictures). This will eventually cause the powder to flake off. > >The other issue is the distinct lack of surface prep on all steel parts! On every single steel part that I have stripped, there is no surface preparation such as scuffing and/or phosphating. All of my steel parts will be undergoing these steps prior to powder coating for the absolute best possible protection from future rust break through. Additionally, the adhesion of the powder coat is significantly better with these additional surface preparations. The cost differential is minimal, since high-end coaters usually do these steps by default. > >Many builders faced with changing the color of their steel parts will simply choose to paint or powder coat over the top of the factory powder coating. This will eventually lead to a less-than-satisfactory result for the reasons outlined above. > >FYI. > >- >Matt Dralle - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 180+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode Matt's Livermore Airport Live ATC Stream! Check out the live ATC stream directly from my hangar at the Livermore Airport. Includes both Tower and Ground transmissions. Archives too! For entertainment purposes only. http://klvk.matronics.com ________________________________ Message 2 _____________________________________ Time: 01:27:41 PM PST US Subject: Re: RV-List: Rusty RV-8 Steel Parts From: vanremog@aol.com Go back and look at the archives. I warned about this very issue when Van' s first began this "new" process and no one was interested. The only prope r way to protect steel parts from corrosion by painting (not plating) is b y blasting the surface rust free, applying a well bonded (clean with tooth) , tight (epoxy) sacrificial (chromate) layer and, if you like, a well bonde d (within the required time to crosslink) a good top coat. This has been we ll established. Powder coating is decorative, not protective. -GV -----Original Message----- From: Matt Dralle Sent: Sun, Jul 13, 2014 11:31 am Subject: RV-List: Rusty RV-8 Steel Parts I sent this email to Van's today. Something to watch out for... >Date: Sun, 13 Jul 2014 11:23:02 -0700 >To: support@vansaircraft.com >From: Matt Dralle >Subject: Rusty RV-8 Steel Parts > > >Dear Van's, > >I am stripping all of the steel parts on my RV-8 to have them re-powder co ated in a textured black to match the rest of my interior. While stripping, I h ave noticed a couple of things regarding factory powder coating. Perhaps the m ost disturbing was the high build up rust under parts in certain areas, primari ly the ones made from the 4130 plate (see attached pictures). This will event ually cause the powder to flake off. > >The other issue is the distinct lack of surface prep on all steel parts! On every single steel part that I have stripped, there is no surface preparati on such as scuffing and/or phosphating. All of my steel parts will be undergo ing these steps prior to powder coating for the absolute best possible protecti on from future rust break through. Additionally, the adhesion of the powder c oat is significantly better with these additional surface preparations. The co st differential is minimal, since high-end coaters usually do these steps by default. > >Many builders faced with changing the color of their steel parts will simp ly choose to paint or powder coat over the top of the factory powder coating. This will eventually lead to a less-than-satisfactory result for the reasons out lined above. > >FYI. > >- >Matt Dralle - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 180+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mo de Matt's Livermore Airport Live ATC Stream! Check out the live ATC stream directly from my hangar at the Livermore Airport. Includes both Tower and Ground transmissions. Archives too! For entertainment purposes only. http://klvk.matronics.com ________________________________ Message 3 _____________________________________ Time: 04:02:29 PM PST US From: HCRV6@comcast.net Subject: Re: RV-List: Rusty RV-8 Steel Parts I had the same problem back in 2002 and 2003 with the canopy frame for my RV-6, which at that time was the only powder coated part I received. after that I ordered the engine mount bare and painted it myself. Sound like not much has changed with Van's powder coating supplier. Harry Crosby ----- Original Message ----- From: "Dralle, Matt" Sent: Sunday, July 13, 2014 11:27:09 AM Subject: RV-List: Rusty RV-8 Steel Parts I sent this email to Van's today. Something to watch out for... >Date: Sun, 13 Jul 2014 11:23:02 -0700 >To: support@vansaircraft.com >From: Matt Dralle >Subject: Rusty RV-8 Steel Parts > > >Dear Van's, > >I am stripping all of the steel parts on my RV-8 to have them re-powder coated in a textured black to match the rest of my interior. While stripping, I have noticed a couple of things regarding factory powder coating. Perhaps the most disturbing was the high build up rust under parts in certain areas, primarily the ones made from the 4130 plate (see attached pictures). This will eventually cause the powder to flake off. > >The other issue is the distinct lack of surface prep on all steel parts! On every single steel part that I have stripped, there is no surface preparation such as scuffing and/or phosphating. All of my steel parts will be undergoing these steps prior to powder coating for the absolute best possible protection from future rust break through. Additionally, the adhesion of the powder coat is significantly better with these additional surface preparations. The cost differential is minimal, since high-end coaters usually do these steps by default. > >Many builders faced with changing the color of their steel parts will simply choose to paint or powder coat over the top of the factory powder coating. This will eventually lead to a less-than-satisfactory result for the reasons outlined above. > >FYI. > >- >Matt Dralle - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 180+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode Matt's Livermore Airport Live ATC Stream! Check out the live ATC stream directly from my hangar at the Livermore Airport. Includes both Tower and Ground transmissions. Archives too! 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