Finishing Talk Forums - The Online Surface Finishing Community - Duplex Seal http://www.finishingtalk.com/community/topic248$2.html The most recent posts in Duplex Seal. Fri, 17 Jul 2009 04:40:52 +0000 PunBB Re: Duplex Seal http://www.finishingtalk.com/community/post2481.html#p2481 <p>Hi</p><p>About the dichromate seal, you should be able to find&#xa0;chrome in your EDX analysis after the sealing and it will show up kind of yellowish.</p><p>Sunny regards</p><p>Anne</p><p><a href="http://www.anodizingworld.com">www.anodizingworld.com</a></p><p>&#xa0;</p> info@finishingtalk.com (AluConsult) Fri, 17 Jul 2009 04:40:52 +0000 http://www.finishingtalk.com/community/post2481.html#p2481 Re: Duplex Seal http://www.finishingtalk.com/community/post2269.html#p2269 <p>How can one verify that Na-or-K-dichromate sealing has been done on an aluminum die casting?&#xa0; I have analyzed the surface using EDS and no chromium is detected.&#xa0; The nickel from the nickel acetate shows up.&#xa0; Can EDS analysis typically detect chromium on a dichromate sealed anodize?</p> info@finishingtalk.com (Metalman) Fri, 01 May 2009 17:42:27 +0000 http://www.finishingtalk.com/community/post2269.html#p2269 Re: Duplex Seal http://www.finishingtalk.com/community/post2062.html#p2062 <p>Anodize hydrates faster and more thoroughly at temperatures near boiling but nickel acetate seals have problems with the stability of the dispersant and smutting at these temperatures.&#xa0; Using both therefore offers better sealing faster, the best of both methods.&#xa0; Kinda like having your cake and eating it too.</p> info@finishingtalk.com (LeoH) Mon, 02 Feb 2009 10:05:45 +0000 http://www.finishingtalk.com/community/post2062.html#p2062 Re: Duplex Seal http://www.finishingtalk.com/community/post2051.html#p2051 <p>I've never heard of or used this process before, so I'm curious about it.&#xa0; I'm assuming that the nickel acetate seal is a mid-temp seal, followed by a high-temp DI seal.&#xa0; Would it be possible to increase the temp in the nickel acetate to the same temperature of the DI seal and achieve the same result but in only 1 tank/step?</p> info@finishingtalk.com (DustinGebhardt) Sat, 31 Jan 2009 22:09:12 +0000 http://www.finishingtalk.com/community/post2051.html#p2051 Re: Duplex Seal http://www.finishingtalk.com/community/post2050.html#p2050 <p>A duplex seal is a nickel acetate seal followed by a hot water seal.&#xa0; It gives a better seal in less time.</p> info@finishingtalk.com (LeoH) Sat, 31 Jan 2009 10:34:26 +0000 http://www.finishingtalk.com/community/post2050.html#p2050 Duplex Seal http://www.finishingtalk.com/community/post470.html#p470 Can anyone tell me about Duplex Seal? I work for a manufacturing company that requests on thier drawings that the Sulfuric Anodizing to have a Duplex seal. Does anyone have any information on this seal? Is there a Mil spec or equivalent for it? Thanks for any help. info@finishingtalk.com (sstjacque) Tue, 23 Jan 2007 19:07:20 +0000 http://www.finishingtalk.com/community/post470.html#p470