Re: Cleaning a board slightly oxydized ??

[Chuck Guzis via cctalk]

On 07/31/2017 10:18 AM, Al Kossow via cctalk wrote:

> has anyone ever determined what the real active ingredient is in that
> stuff?
The MSDS is an exemplar for industrial obfuscation:

http://www.techni-tool.com/site/MSDS/218CH052.pdf

Composition?  It's all proprietary, so we can't tell you.
Toxicology?  We haven't tested it, but there's toxicological data for
some of the components--but we won't tell you what those are.

If your kid drinks this stuff, give him lots of water and don't bug us.

--Chuck

RE: Cleaning a board slightly oxydized ??

[Dave Wade via cctalk]

> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of william
> degnan via cctalk
> Sent: 31 July 2017 17:54
> To: Warner Losh <i...@bsdimp.com>; General Discussion: On-Topic and Off-
> Topic Posts <cctalk@classiccmp.org>
> Subject: Re: Cleaning a board slightly oxydized ??
> 
> On Mon, Jul 31, 2017 at 12:24 PM, Warner Losh via cctalk <
> cctalk@classiccmp.org> wrote:
> 
> > On Mon, Jul 31, 2017 at 10:22 AM, Jon Elson via cctalk <
> > cctalk@classiccmp.org> wrote:
> >
> > > On 07/31/2017 03:13 AM, Alexandre Souza via cctalk wrote:
> > >
> > >> AFAIK, common household and vinegar and citric acid are the same
> thing.
> > >> Can
> > >> you elaborate, please? O_O
> > >>
> > >>
> > >> Vinegar is Acetic acid, Citric acid is Citric acid, a different
> > >> chemical
> > > compound.
> > >
> >
> > And there's often impurities in household vinegar, so you have to be a
> > little careful which ones you use for cleaning. Balsamic Vinegar, not
> > a good choice :). Though most of the white vinegars or concentrated
> > vinegars work well enough for cleaning.
> >

In Spain they sell cleaning vinegar, I think for removing limescale so perhaps 
not very free of contaminants...

Dave



> > Warner
> >
> 
> 
> DE-Oxit?

Re: Cleaning a board slightly oxydized ??

[Al Kossow via cctalk]

On 7/31/17 9:53 AM, william degnan via cctalk wrote:

> DE-Oxit?
> 
over an entire board?
seems like a really expensive solution to a simple problem
has anyone ever determined what the real active ingredient is in that stuff?

Re: Cleaning a board slightly oxydized ??

[Chuck Guzis via cctalk]

On 07/31/2017 09:24 AM, Warner Losh via cctalk wrote:

> And there's often impurities in household vinegar, so you have to be
> a little careful which ones you use for cleaning. Balsamic Vinegar,
> not a good choice :). Though most of the white vinegars or
> concentrated vinegars work well enough for cleaning.

The stuff for cleaning (and making pickles) is usually identified as
"Distilled White Vinegar".

Citric acid, unlike acetic acid, occurs as a white crystalline powder,
which makes it convenient to store.   Just dissolve in the appropriate
volume of water for use (cleaning lime scale or making lemonade).

--Chuck

Re: Cleaning a board slightly oxydized ??

[william degnan via cctalk]

On Mon, Jul 31, 2017 at 12:24 PM, Warner Losh via cctalk <
cctalk@classiccmp.org> wrote:

> On Mon, Jul 31, 2017 at 10:22 AM, Jon Elson via cctalk <
> cctalk@classiccmp.org> wrote:
>
> > On 07/31/2017 03:13 AM, Alexandre Souza via cctalk wrote:
> >
> >> AFAIK, common household and vinegar and citric acid are the same thing.
> >> Can
> >> you elaborate, please? O_O
> >>
> >>
> >> Vinegar is Acetic acid, Citric acid is Citric acid, a different chemical
> > compound.
> >
>
> And there's often impurities in household vinegar, so you have to be a
> little careful which ones you use for cleaning. Balsamic Vinegar, not a
> good choice :). Though most of the white vinegars or concentrated vinegars
> work well enough for cleaning.
>
> Warner
>


DE-Oxit?

Re: Cleaning a board slightly oxydized ??

[Warner Losh via cctalk]

On Mon, Jul 31, 2017 at 10:22 AM, Jon Elson via cctalk <
cctalk@classiccmp.org> wrote:

> On 07/31/2017 03:13 AM, Alexandre Souza via cctalk wrote:
>
>> AFAIK, common household and vinegar and citric acid are the same thing.
>> Can
>> you elaborate, please? O_O
>>
>>
>> Vinegar is Acetic acid, Citric acid is Citric acid, a different chemical
> compound.
>

And there's often impurities in household vinegar, so you have to be a
little careful which ones you use for cleaning. Balsamic Vinegar, not a
good choice :). Though most of the white vinegars or concentrated vinegars
work well enough for cleaning.

Warner

Re: Cleaning a board slightly oxydized ??

[Alexandre Souza via cctalk]

AFAIK, common household and vinegar and citric acid are the same thing. Can
you elaborate, please? O_O

2017-07-31 5:01 GMT-03:00 Christian Corti :

> On Sun, 30 Jul 2017, Alexandre Souza wrote:
>
>> Light green? Was it battery electrolyte? Wash it with vinegar (yes,
>> vinegar) and after, wash with a good detergent and warm water.
>>
>
> No, *not* vinegar. Use citric acid. You don't want to force the formation
> of copper acetate.
>
> Christian
>

Re: Cleaning a board slightly oxydized ??

[Christian Corti via cctalk]

On Sun, 30 Jul 2017, Alexandre Souza wrote:

Light green? Was it battery electrolyte? Wash it with vinegar (yes,
vinegar) and after, wash with a good detergent and warm water.


No, *not* vinegar. Use citric acid. You don't want to force the formation 
of copper acetate.


Christian

Re: Cleaning a board slightly oxydized ??

[Alexandre Souza via cctalk]

Light green? Was it battery electrolyte? Wash it with vinegar (yes,
vinegar) and after, wash with a good detergent and warm water.
I did a video of the washing part, saving a macintosh.
https://www.youtube.com/watch?v=ez5IbF39SRY
(in portuguese, since I'm Brazilian :) But you can watch it and understand
the workings :oD )

2017-07-30 16:25 GMT-03:00 GerardCJAT via cctech :

> What is the best way to clean a ( populated ) board lightly oxydized  ,
> that shows light green copper oxyde spots ( only on the components side ) ??
>
> Toothbrush +  ??
>

Cleaning a board slightly oxydized ??

[GerardCJAT via cctalk]

What is the best way to clean a ( populated ) board lightly oxydized  , that 
shows light green copper oxyde spots ( only on the components side ) ??

Toothbrush +  ??