Return-Path: Received: from smtp02.infoave.net ([165.166.0.27]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Mon, 11 Sep 2000 18:39:07 -0400 Received: from john ("port 1380"@[207.144.78.33]) by SMTP00.InfoAve.Net (PMDF V5.2-33 #45322) with SMTP id <01JU22883X8U95NLMD@SMTP00.InfoAve.Net> for lancair.list@olsusa.com; Mon, 11 Sep 2000 18:45:34 EDT Date: Fri, 08 Sep 2000 17:24:41 -0400 From: John Cooper Subject: Alodine vs anodize vs powder coating To: lancair.list@olsusa.com Message-id: <3.0.5.32.20000908172441.00838100@mail.citcom.net> X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> AFAIK, paint will not adhere to anodized aluminum. Try it on your home window frames and see. I had all small aluminum parts (which would not be painted) anodized, but the ones that would be painted, I alodined then zinc-chromated. On the smaller push-pull tubes, I ginned up an appropriate-sized bore brush on the end of some heavy-wall .375 O.D. aluminum tube about 6' long. I then chucked up the tube in my 3/8" electric drill [be sure to use a G.F.C.I. electric outlet] and broke the glaze on the I.D. of the tubes. Then I etched and alodyned in the usual manner. On the larger I.D. tubes, I used an automotive brake cylinder hone. It worked well as long as I lubricated it with water during the honing process. Be sure not to take a lot of metal off! Also, I found that the alodine finish came out much more even when I constantly rubbed the workpiece with a cotton ball. Otherwise, it came out mottled. Oh yeah, one other tip. Prior to etching, be sure to wet-sand the workpiece with 320 grit wet-or-dry sandpaper until water does not bead up on it. Then etch, then flood with water for at least five minutes to remove all traces of acid. (The purists out there can use litmus paper to verify this.) Then Alodine. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>