Return-Path: Received: from arl-img-4.compuserve.com ([149.174.217.134]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with ESMTP id AAA28875 for ; Wed, 16 Sep 1998 15:57:35 -0400 Received: (from root@localhost) by arl-img-4.compuserve.com (8.8.6/8.8.6/2.14) id PAA02904 for lancair.list@olsusa.com; Wed, 16 Sep 1998 15:57:26 -0400 (EDT) Date: Wed, 16 Sep 1998 15:56:53 -0400 From: "Lynda K. Frantz" Subject: Anodize and Alodine Sender: "Lynda K. Frantz" To: "INTERNET:lancair.list@olsusa.com" Message-ID: <199809161557_MC2-59A9-704@compuserve.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Disposition: inline X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> If you read my previous post closely you will note two terms anozize and alodine. Not sure I'm spelling either correctly. Anyway Anodize infact puts a good scratch resistant coating on the AL in any one of many colors but usually black. Thus will not need to be painted. This process is in my opinion beyond the capability of a small shop and has to be farmed out and typically results in a minimum fee of $45 here locally even for the smallest part. Alodine on the other hand imparts a gold or clear coating on the AL but is not scratch resistant at all. But it does provide an excellent base for paint primers like DP50 to stick to. In areas where scratching is not a factor alodine alone is an excellent corosion resistor and much lighter than paint. The neat thing about alodyning is that you can easily do it yourself. Many auto paint shops carry the AL cleaner and the chemical that imparts the alodine to the AL. All you need is a dip tank to hold the acid (ie. PPG Chroamicoat 103) which is basically chromic acid. When the AL turns a slight gold color you have inparted a very thin but corosion proof coating to the AL. Don't drink the acid or dump it down the drain when done! Alodining or Anodyzing both make AL corosion resistant and are much lighter than any paint process I know of. Most of the AL parts on my Lancair are alodined and some are black anodyzed and a few are alodined and painted where scratch resistance or cosmetic appeal is a requirement. Jim Lancair Network News