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Date:         Wed, 28 Nov 2007 16:31:50 -0800
Reply-To:     Zoltan Kuthy <zolo@FOXINTERNET.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Zoltan Kuthy <zolo@FOXINTERNET.NET>
Subject:      Re: What is the scientific explanation?
Comments: To: Scott Daniel - Shazam <scottdaniel@turbovans.com>
In-Reply-To:  <000a01c8321d$52b2f780$6701a8c0@TOSHIBALAP>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
              reply-type=original

I know, I can buy sacrificial anode in all kind of sizes at the marine shop. Where would I mount it to to make it effective. There are unused threaded holes on each cylinder heads. Would that work? Zoltan ----- Original Message ----- From: "Scott Daniel - Shazam " <scottdaniel@turbovans.com> To: "'Zoltan Kuthy'" <zolo@FOXINTERNET.NET> Cc: <vanagon@GERRY.VANAGON.COM> Sent: Wednesday, November 28, 2007 4:18 PM Subject: RE: What is the scientific explanation?

Sometimes I put red High Tack gasket sealer on the aluminum fitting before putting the hose on. Insulates them electrically, and it comes apart just fine later. There might even be a dedicated product in the marine industry. And then there's the Sacrificial Anode radiator cap, everybody knows about those, right ? Scott www.turbovans.com

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Zoltan Kuthy Sent: Wednesday, November 28, 2007 3:39 PM To: vanagon@GERRY.VANAGON.COM Subject: Re: What is the scientific explanation?

Chad, You were the only one who could answer it, so far anyway. Now, the question is; what is the remedy? What to do to stop it to happen?

Does it also mean that the rubber has some electrical conductivity? Zoltan ----- Original Message ----- From: Chad Lyles To: Zoltan Kuthy Cc: vanagon@gerry.vanagon.com Sent: Wednesday, November 28, 2007 1:37 PM Subject: Re: What is the scientific explanation?

this is a from of corrosion caused by a current flow generated between two materials with greatly differing electrical potentials. Contrary to popular belief, galvanism does not occur just between two different metals; it can occur between other materials, such as carbon rubber and a metal. Carbon rubber mated against aluminum, for example, is a disastrous combination that will destroy aluminum very quickly. This is often found in carbon rubber hose joined to aluminum or copper pipes and is often referred to as electro-chemical degradation (ECD)

hope this helps answer the question. Chad~

On Nov 28, 2007 12:26 PM, Zoltan Kuthy <zolo@foxinternet.net > wrote:

I have always wondered, why would there be extensive aluminum corrosion built up under rubber hoses on aluminum parts or under the head gasket. I don't see any electrolysis activity going on under such insulating material. I am baffled. Anyone has an acceptable scientific explanation? Or is it something everyone knows except I. Zoltan

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