Comments to
- M.M. Attar, J.D. Scantlebury
- Polyaniline as a possible inhibitor for the corrosion of mild steel
J. Corr. Sci. Eng., Vol 1, paper 8
To: Corrosion Special Interest List @LISTSERV.RL.AC.UK>
From: "Dr. Bernhard Wessling" @zipperling.do.eunet.de>
Subject: Re: what is passivity? (2)
Hello, Professor Antonijevic,
At 09:44 17.02.98 GMT+01, you wrote:
>
> Dear dr Wessling,
> I have one question for you. Is " your" corrosion potential
> polyaniline+steel system potential?
>
> Best regards
>
>
>=====================================================================
>
>Professor Dr Milan M. Antonijevic
Yes. The determination of the "corrosion" potential is very much dependant
upon the measuring configuration. If you arrange for a very precise
measurement, with very low current density involved (mikro-amps/cm², and
tenth of mikro-amps), than you will not measure a potential very much
different from the normal steel potential. However, if you measure in the
milli-amp range, the polyaniline-caoted steel will show a much higher potential.
Moreover, if you measure the Volta potential, you can easily see the
shifted potential in the range of +300 to +500 mV (vs. H2-electrode) under
the polyaniline/top coat coating system.
Dr. Bernhard Wessling
ORMECON CHEMIE GmbH & Co., KG a subsidiary of Zipperling Kessler & Co.
Ferdinand-Harten-Str. 7
D-22949 Ammersbek
Germany
