[Diy_efi] info

[Bill Shaw]

We're talking about rinsing the board in water,  not putting it in a bath
for a month.  Sheesh,  it's a shame how this list has deveolved into endless
pissing contests and hair splitting. Back in the old days before the DIY-WB
fiasco made the list implode there was real, serious efi content here.  Now
it's just mostly this kind of junk.

Bill

> From: "Mike" <niche at iinet.net.au>
> Reply-To: diy_efi at diy-efi.org
> Date: Mon, 31 Oct 2005 12:02:03 +0800
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] info
> 
> At 05:13 AM 10/31/05, you wrote:
>> Actually,  they call water the 'universal solvent' for a reason.  I'd start
>> there,  and if it appears there is some residue the water can't get I might
>> try more agressive solvents.
> 
> mmmm, not really - Water is a fairly good ionic solvent but suffers
> from the H to OH equilibria, in that its neutrality is probabilisitc,
> when it gets to actually dissolve anything and is either acidic or caustic
> as a consequence and has repercussions on that basis. Vis a vis
> using water as engine coolant where electrolytic damage is so prevalent,
> the H to OH equilibrium seems to win out regardless of what chemicals
> are added. That green inhibitor needs frequent changing, what I've
> settled on is a tannin type pill which coats the alloy with a protective
> layer and seems to work effectively for long periods. The only downside
> is a little brown sludge if instructions/amounts not precisely adhered to.
> 
> Electronic components are not generally designed for immersion
> in water, sure some can tolerate water for cleaning - but for electronics
> Isopropanol is more generally accepted as the universal cleaner
> and might be interpreted as the universal solvent for pollutants
> affecting electronic repair and service. Its also ionic and boards
> shouldnt be left in it for long otherwise there electrolytic effects.
> The good thing about it is - its so volatile and drys off in a few
> mere seconds on some occasions, plenty of ventilation is essential
> as it is combustible and although it smells (ok) I wouldnt breath
> the stuff at all if I could help it.
> 
> Interesting your comment re "aggressive" bringing a human emotive
> issue to one of chemical compatibility. What I mean to say is there
> are so many products and processes that have only a compatibility
> issue not one which is either passive or aggressive
> and to use those terms seems discontinuous with solvents. Sure,
> the appearance is either one is more or less aggressive than another
> but it comes down to a sheer compatibility only in the long run.
> 
> Also water is (AFAIK) only ionic whereas Isopropanol is ionic and
> covalent in terms of its capacity to dissolve most pollutants which
> can affect electronics, the Isopropanol is designed around for that purpose.
> 
> Rgds
> 
> Mike
> 
> 
> 
> 
> 
> 
>> Again,  just mho.
>> 
>> Bill
>> 
>>> From: "Mike" <niche at iinet.net.au>
>>> 
>>> At 08:31 AM 10/29/05, you wrote:
>>>> I'd remove it from the case,  wash down the PCB and case good with clear
>>>> clean water,  then blow it with compressed air and let it dry for a few
>>>> days.
>>>> Once I was sure it was complete dry I'd reassemble it and try running it.
>>>> What id there to loose?
>>> 
>>> Best solvent to remove other things is Isopropyl alcohol (Isopropanol),
>>> let dry normally - dont use compressed air, there is potential for localised
>>> static damage,
>>> 
>>> Rgds
>>> 
>>> Mike
>>> 
>>> 
>>> 
>>> 
>>> 
>>>> Just MHO :-)
>>>> 
>>>> Bill
>>>> 
>>>> From: "Lee M. Lemoine" <llemoine at gmail.com>
>>>> 
>>>>> John, if antifreeze can damage paint, think about
>>>>> what it may do
>>>>> to a PCB.
>>>>> You could spend a lot of time replacing parts, and
>>>>> still have an
>>>>> unreliable
>>>>> ECU. Wrecking yard option sounds good. Make sure it
>>>>> comes from a
>>>>> car
>>>>> without a leaky heater core.
>>>>> 
>>>>> Geoff H
>>>> 
>>>>> 
>>>> _______________________________________________
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>>>> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>>> 
>>> 
>>> Regards from
>>> 
>>> 
>>> Mike
>>> Perth, Western Australia
>>> VL Commodore Fuse Rail that wont warp or melt !
>>> Twin tyres for most sedans, trikes and motorcycle sidecars
>>> http://niche.iinet.net.au
>>> _______________________________________________
>>> Diy_efi mailing list
>>> Diy_efi at diy-efi.org
>>> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>> 
>> _______________________________________________
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> 
> 
> Regards from
> 
> 
> Mike
> Perth, Western Australia
> VL Commodore Fuse Rail that wont warp or melt !
> Twin tyres for most sedans, trikes and motorcycle sidecars
> http://niche.iinet.net.au
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/diy_efi