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Article #435Re: Semi [OT]: What is the black deposit on the underside of wet lead acid battery vent caps?
From: Rheilly Phoull
Date: Mon, 27 Jun 2011 11:09
Date: Mon, 27 Jun 2011 11:09
32 lines
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2819 bytes
On 6/27/2011 5:15 PM, Dennis wrote: > "Rheilly Phoull"<rheilly@bigslong.com> wrote in message > news:MqmdnVeUp46ZqpXTnZ2dnUVZ_vKdnZ2d@westnet.com.au... >> On 6/27/2011 2:42 PM, Dennis wrote: >>> Does anyone know what the black smudgy deposit is that forms on the >>> underside of wet cell lead acid automotive batteries is? >>> >>> It looks a little like soot and is easily wiped away. >>> >>> I've heard it can suggest the battery is failing. Is there any substance >>> to >>> this or is it just an anecdotal red herring? >>> >>> Cheers >>> D. >>> >>> >> The technical term is "Krud" :-) >> Might be worn off the casing ?? >> > > I nearly used the common trade term of "black shit", "krud" is more > professional. > > It could be from the casing but I wouldn't think so as it's to be deposited > on the bottoms of the vent plugs as if carried there by the electrolyte > "bubbles" during charging. > > Ahhh ! THAT Krud ! Didn't come up in the original post :-)
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X-Google-Thread: a5a6238865,9fd0da4172ca4fb2 X-Google-Attributes: gida5a6238865,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!border3.nntp.dca.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.westnet.com.au!news.westnet.com.au.POSTED!not-for-mail NNTP-Posting-Date: Mon, 27 Jun 2011 06:09:44 -0500 Date: Mon, 27 Jun 2011 19:09:27 +0800 From: Rheilly Phoull <rheilly@bigslong.com> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.18) Gecko/20110616 Lightning/1.0b2 Thunderbird/3.1.11 MIME-Version: 1.0 Newsgroups: sci.electronics.design,aus.electronics Subject: Re: Semi [OT]: What is the black deposit on the underside of wet lead acid battery vent caps? References: <o7-dnSpXZMnau5XTnZ2dnUVZ_o6dnZ2d@westnet.com.au> <MqmdnVeUp46ZqpXTnZ2dnUVZ_vKdnZ2d@westnet.com.au> <9qKdna9ky4-x15XTnZ2dnUVZ_s6dnZ2d@westnet.com.au> In-Reply-To: <9qKdna9ky4-x15XTnZ2dnUVZ_s6dnZ2d@westnet.com.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: <iP6dnRyxD99k-ZXTnZ2dnUVZ_judnZ2d@westnet.com.au> Lines: 32 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 58.7.232.79 X-Trace: sv3-N2UtfAXeqP4LT1e7om/r8CpUsiDgghHCP2lQ1NLXqRpHWHAJYmBYU/y7UIWIQNSzlsEw4jQ8Yhyk6s5!cdT/B+LxuQIsFOOFbn5WsNNQyTy3iNMSOCSCLiVl71wholI4rRi6mTEuRXAiovhZhSv90im/zJaw!tGlmjgdSQZTdI2eFIQ== X-Complaints-To: abuse@westnet.com.au X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 2411