Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Wed, 10 Sep 2003 02:14:50 -0400 Message-ID: X-Original-Return-Path: Received: from vineyard.net ([204.17.195.90] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2574377 for lml@lancaironline.net; Tue, 09 Sep 2003 23:36:19 -0400 Received: from localhost (loopback [127.0.0.1]) by vineyard.net (Postfix) with ESMTP id 41A24915C4 for ; Tue, 9 Sep 2003 23:36:19 -0400 (EDT) Received: from vineyard.net ([127.0.0.1]) by localhost (king1.vineyard.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 93341-06 for ; Tue, 9 Sep 2003 23:36:19 -0400 (EDT) Received: from direct (fsy5.vineyard.net [66.101.65.5]) by vineyard.net (Postfix) with SMTP id 6A1119158C for ; Tue, 9 Sep 2003 23:36:18 -0400 (EDT) X-Original-Message-ID: <000f01c3774d$244b2f00$05416542@direct> From: "Ted Stanley" X-Original-To: "Mail List Lancair" Subject: Re: bonding aluminum to aluminum X-Original-Date: Tue, 9 Sep 2003 23:28:50 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Virus-Scanned: by AMaViS at Vineyard.NET Jim Hergert mentioned that aluminum "oxidizes very fast so you need to bond it within 2 or 3 days to get full strength". Jim, perhaps you made a typo. I presume you meant to say that aluminum should be bonded within 2 or 3 HOURS of being etched. In addition bond failure can occur when parts are etched but not primed due to corrosion attacking the highly active etched surfaces resulting in subsequent peel failure. I quite agree that a properly placed mechanical fastener can greatly reduce the chance of a disbond due to peel failure. Ted Stanley