Josh;
The off gassing from a battery is primarily: 1) Water vapor as the water evaporates with heat. This happens even when not charging (to a very small degree) on days when the relative humidity in the air is low. But then low relative humidity is a pretty rare event in the air around a boat that is in the water. In most flooded batteries this water vapor is condensed in the caps and drips back into the cells. 2) Hydrogen gas that is released when the SO4 part of the sulfuric acid bonds to the lead plates as a result of high temperatures while charging or as the plates sulfate during longer periods of storage. 3) Hydrogen and oxygen gas from electrolysis at higher charge rates. Electrolysis isn't usually much of a factor at normal charge rates. Rick Brass From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Josh Muckley via CnC-List Sent: Thursday, February 26, 2015 10:38 AM To: C&C List; dwight Subject: Re: Stus-List Batteries -- Flooded, Sealed or AGM? Dwight, I think the theory is that the same electroisys that is breaking the molecular bond in the water is breaking the bonds in the sufuric acid resulting in corrosive sulfer gas. Josh On Feb 26, 2015 7:49 AM, "dwight veinot via CnC-List" <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > wrote: Jake Not sure you can attribute that corrosion to off-gassing from your batteries...what gases do you think cause this corrosion? Off gassing from batteries under charging conditions usually means hydrogen gas... Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS d.ve...@bellaliant.net <mailto:d.ve...@bellaliant.net> On Thu, Feb 26, 2015 at 7:51 AM, Jake Brodersen via CnC-List <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > wrote: Edd, I prefer AGM. No noxious gases to be vented into the cabin. I have a lot of corrosion on my electrical panel that I directly attribute to being bathed in off-gassing from old batteries. Plus, they're safer from an explosion perspective, as well as if you ever end up inverted for a short period of time. Jake Jake Brodersen "Midnight Mistress" C&C 35 Mk-III Hampton VA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com <mailto:cnc-list-boun...@cnc-list.com> ] On Behalf Of Edd Schillay via CnC-List Sent: Wednesday, February 25, 2015 11:17 AM To: <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > Subject: Stus-List Batteries -- Flooded, Sealed or AGM? Listers, As you know, I'm redoing the electrical systems on the Enterprise (thanks to all for diagrams and advice). So now comes the question of what type of battery to use in my house bank - Flooded, Sealed or AGM? What do you have on your C&C and why do you prefer it? And, if you have flooded, how often do you top them off with distilled water? The countdown has begun! http://enterpriseb.blogspot.com/2015/02/launch-of-enterprise-countdown.html All the best, Edd Edd M. Schillay Starship Enterprise C&C 37+ | Sail No: NCC-1701-B City Island, NY Starship Enterprise's Captain's Log <http://enterpriseb.blogspot.com/> _______________________________________________ Email address: CnC-List@cnc-list.com <mailto:CnC-List@cnc-list.com> To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ Email address: CnC-List@cnc-list.com <mailto:CnC-List@cnc-list.com> To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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