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Groups > aus.electronics > #35792
| From | Xeno <xenolith@optusnet.com.au> |
|---|---|
| Newsgroups | aus.electronics, aus.cars, alt.home.repair, uk.d-i-y |
| Subject | Re: DIY Electronic Vehicle Rust Prevention |
| Date | 2024-03-06 12:03 +1100 |
| Message-ID | <l4ptmcFjg5iU2@mid.individual.net> (permalink) |
| References | (6 earlier) <op.2jpnut1nnuhhzz@pvr2.lan> <DHZCN.61731$mMj7.23640@fx01.iad> <65dd0b36@news.ausics.net> <YpFFN.64912$mMj7.38353@fx01.iad> <l4phgdFhr6kU1@mid.individual.net> |
Cross-posted to 4 groups.
On 6/3/2024 8:35 am, Daryl wrote:
> On 6/3/2024 12:49 am, Bud Frede wrote:
>> not@telling.you.invalid (Computer Nerd Kev) writes:
>>
>>> In aus.electronics Bud Frede <frede@mouse-potato.com> wrote:
>>>> chop <chop654@gmail.com> writes:
>>>>> On Sun, 25 Feb 2024 23:36:42 +1100, Computer Nerd Kev
>>>>> <not@telling.you.invalid> wrote:
>>>>> I sure wouldn't pay hundreds
>>>>>> for one, but if the root of the thing is just applying simple
>>>>>> electrical signals to the paint surface, it's an easy thing to test
>>>>>> a DIY equivalent on some bits of scrap. Some of the patents contain
>>>>>> useful details.
>>>>>>
>>>>>> But if there are actual records of people doing such tests and
>>>>>> showing that it's all lies, which I can see myself (not just hear
>>>>>> rumor of), then I wouldn't.
>>>>
>>>> A friend of mine tested this in the lab when I was in college. The
>>>> devices don't work. They've been around for decades and they've never
>>>> worked.
>>>>
>>>> He wrote a paper on it for the class he was in, but I don't think it
>>>> was
>>>> ever published since it just debunked some junk science and didn't
>>>> actually represent any new and valuable research in terms of chemistry.
>>>
>>> That's a shame, it would have been interesting to compare his
>>> device and test rig with the successful Canadian lab tests:
>>> https://www.autosaverobd.com/wp-content/uploads/2023/02/ITS-REPORT-015-05015-4-_3-15-2007_.pdf
>>> https://www.finalcoat.com/assets/lab_tests/CC_Tech.pdf
>>>
>>> And "Final Coat" have had their device's experimental results
>>> published in scientific papers (the same testing that the Canadian
>>> regulator also accepted):
>>> https://www.finalcoat.com/news.html
>>>
>>> But details of a test done without any financial motivation for its
>>> success would be very interesting.
>>
>> I took a quick look at the ITS report pdf. It says the test was done by
>> immersing the panel in a saline solution.
>>
>> My friend was able to get some painted panels from an engineer who
>> worked at Ford and was interested in the test. He then hooked up one of
>> the devices (he borrowed it from someone who owned one) and sprayed the
>> panels with a periodic spray of saline solution. I think the full test
>> ran for 6 months.
>>
>> The idea behind the spray was that it would more closely approximate
>> normal usage on a car, and not marine usage, where things like
>> sacrificial anodes for corrosion protection are common.
>>
>> The painted panels started corroding within a couple of months and were
>> pretty damaged by the end of the test. A lot of the corrosion started at
>> the edges where the metal was bare, but there was corrosion that started
>> in the middle of the panels as well. I figured that the edge corrosion
>> would be similar to what would happen to a surface with a scratch in the
>> paint.
>>
>> He did have some panels in another enclosure that were not connected to
>> one of the devices. There wasn't much, if any difference between the
>> sets of panels. They all rusted.
>>
>> The test was done in the late '80s, so I'd expect that coatings
>> technology has greatly improved since then, plus I know that at least
>> some (all?) of the car makers now use galvanized steel for body
>> parts. There's possibly less need for one of these devices now than
>> there was.
>>
>> I'm not telling anyone what to buy or not buy, but I know that for
>> myself I wouldn't spend the money on these gadgets. I'd rather put that
>> money into washing my car to try to clean the salt off.
>>
>> I think my friend wound up having more fun building the test rigs than
>> anything else. Running the tests themselves was about as fun as watching
>> grass grow. :-)
>>
>> BTW, I'm not disputing the electrochemistry that's the basis of these
>> devices. I'm just not convinced that it applies to these devices in the
>> real world on cars being driven on roads, particularly in areas where
>> they're exposed to salt.
>>
>
> Another aspect to these devices is their power consumption, to work they
> would need to be on 24/7, if a vehicle was parked for long periods of
> time I'd expect that its battery would be drained fairly quickly even
> more so on modern cars that already have power hungry devices such as
> security systems consuming power all the time.
All the *power hungry devices* on modern cars should go into *sleep
mode* when the car is turned off, locked and unattended. In sleep mode,
vehicle subsystems are switched off or to an inactive state to prevent
any parasitic draw on the battery. If the vehicle is inactive for,
typically, 2 weeks and/or the battery falls below 9.5 Volts, the vehicle
shifts into *deep sleep mode*. For some vehicles (Ford), the only way to
exit deep sleep mode is to start the engine with the key, remote start
being disabled. Darren's Ranger will have this facility.
> To prevent battery drain the devices would need to be turned off when
> the car wasn't running which must reduce the possibility of it working
> even further.
All done *automatically* Daryl. The system controlling parasitic draws
has been in cars for, quite literally, *decades*. Please try to keep up.
--
Xeno
Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)
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