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effet pile

English translation: contact e.m.f.

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16:55 Sep 21, 2007
French to English translations [PRO]
Science - Electronics / Elect Eng / Car manufacture
French term or phrase: effet pile
I am not sure of the exact term/word for this in English. I know that it relates to electrolysis, but am not sure if it is exactly the same. The context is:

"La corrosion se produit par effet pile avec le caoutchouc"

I could use "electrolysis" except that there is another sentence "et évitent l’effet pile (électrolyse)" and so, I can't use the term twice. Unless I just put "electrochemical reaction" or similar?

Any suggestions would be very much appreciated.

Thank you.
Sarah Truesdale
New Zealand
Local time: 19:48
English translation:contact e.m.f.
Explanation:
(electromotive force)

From my notes:
Effet pile Also Effet de pile électrolytique. Contact e.m.f. [Chambers]

What you get when that bit of silver foil stuck to a chocolate comes into contact with that filling in your back tooth.

Chambers says nothing about teeth, but does say this:

contact e.m.f. - (Elec. Eng.) That which arises at the contact of dissimilar metals at the same temperature, or the same metal at different temperatures.

Don't see how it can apply to rubber, though.

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Note added at 7 hrs (2007-09-21 23:56:04 GMT)
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I know you're not supposed to bundle silver tableware together with rubber bands, because the rubber corrodes the silver. That may well be the same phenomenon, even if the def. above speaks only of metals.

I think you can also say "contact potential" or "contact potential difference".

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Note added at 7 hrs (2007-09-22 00:00:27 GMT)
--------------------------------------------------

Contact potential difference
An electrostatic potential that exists between samples of two dissimilar electrically conductive materials (metals or semiconductors with different electron work functions) that have been brought into thermal equilibrium with each other, usually through a physical contact. Although normally measured between two surfaces which are not in contact, this potential is called the contact potential difference.
http://www.answers.com/topic/contact-potential-difference?ca...


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Note added at 7 hrs (2007-09-22 00:04:36 GMT)
--------------------------------------------------

As I understand both, electrolysis is the reverse. In "effet pile", the contact of the metals generates a few microvolts. In electrolysis, metals are immersed in a metal salt solution and a powerful electric charge is applied between them, causing ions from the salt bath to be deposited on the metal, or causing the metal to corrode as its ions get hitched to the solution.
Selected response from:

xxxBourth
Local time: 09:48
Grading comment
4 KudoZ points were awarded for this answer

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Summary of answers provided
3contact e.m.f.xxxBourth


Discussion entries: 3





  

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6 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5
contact e.m.f.


Explanation:
(electromotive force)

From my notes:
Effet pile Also Effet de pile électrolytique. Contact e.m.f. [Chambers]

What you get when that bit of silver foil stuck to a chocolate comes into contact with that filling in your back tooth.

Chambers says nothing about teeth, but does say this:

contact e.m.f. - (Elec. Eng.) That which arises at the contact of dissimilar metals at the same temperature, or the same metal at different temperatures.

Don't see how it can apply to rubber, though.

--------------------------------------------------
Note added at 7 hrs (2007-09-21 23:56:04 GMT)
--------------------------------------------------

I know you're not supposed to bundle silver tableware together with rubber bands, because the rubber corrodes the silver. That may well be the same phenomenon, even if the def. above speaks only of metals.

I think you can also say "contact potential" or "contact potential difference".

--------------------------------------------------
Note added at 7 hrs (2007-09-22 00:00:27 GMT)
--------------------------------------------------

Contact potential difference
An electrostatic potential that exists between samples of two dissimilar electrically conductive materials (metals or semiconductors with different electron work functions) that have been brought into thermal equilibrium with each other, usually through a physical contact. Although normally measured between two surfaces which are not in contact, this potential is called the contact potential difference.
http://www.answers.com/topic/contact-potential-difference?ca...


--------------------------------------------------
Note added at 7 hrs (2007-09-22 00:04:36 GMT)
--------------------------------------------------

As I understand both, electrolysis is the reverse. In "effet pile", the contact of the metals generates a few microvolts. In electrolysis, metals are immersed in a metal salt solution and a powerful electric charge is applied between them, causing ions from the salt bath to be deposited on the metal, or causing the metal to corrode as its ions get hitched to the solution.

xxxBourth
Local time: 09:48
Native speaker of: Native in EnglishEnglish
PRO pts in category: 447
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