Electrochemistry of active chromium. Part III. Effects of temperature
It was shown that the temperature in the range 20 65 ºC has considerable effects on the electrochemical anodic dissolution of chromium in the active potential range as well as on the electrochemical hydrogen evolution reactions on bare and oxide covered chromium surfaces. Also, the chemical dissolu...
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Serbian Chemical Society
2003-11-01
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doaj-f704490b20c948198cfad175ae4670582020-11-24T21:02:11ZengSerbian Chemical Society Journal of the Serbian Chemical Society0352-51392003-11-016811871881Electrochemistry of active chromium. Part III. Effects of temperatureJ. P. POPICD. M. DRAZICIt was shown that the temperature in the range 20 65 ºC has considerable effects on the electrochemical anodic dissolution of chromium in the active potential range as well as on the electrochemical hydrogen evolution reactions on bare and oxide covered chromium surfaces. Also, the chemical dissolution of chromium is strongly affected. The apparent energy of activation for anodic dissolution is 63.1 kJ mol-1, for hydrogen evolution on a bare Cr surface 19.5 kJ mol-1, for the same reaction on an oxide covered surface 44.0 kJ mol-1 and for the chemical (anomalous) dissolution 66.9 kJ mol-1. The temperature dependences of the total corrosion rate, and the electrochemical corrosion rate alone, are presented in polynomial forms with the appropriate constants obtained by the best fit of the experimental data. For the hydrogen evolution reaction on both bare and oxide covered chromium, the Volmer-Heyrovsky reaction mechanism with the second step as rate determining was proposed.http://www.shd.org.yu/HtDocs/SHD/Vol68/No11/V68-No11-11.pdfchromiumanodic dissolutionanomalous dissolutionhydrogen evolutionsulfuric acideffect of temperatureenergy of activation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
J. P. POPIC D. M. DRAZIC |
spellingShingle |
J. P. POPIC D. M. DRAZIC Electrochemistry of active chromium. Part III. Effects of temperature Journal of the Serbian Chemical Society chromium anodic dissolution anomalous dissolution hydrogen evolution sulfuric acid effect of temperature energy of activation |
author_facet |
J. P. POPIC D. M. DRAZIC |
author_sort |
J. P. POPIC |
title |
Electrochemistry of active chromium. Part III. Effects of temperature |
title_short |
Electrochemistry of active chromium. Part III. Effects of temperature |
title_full |
Electrochemistry of active chromium. Part III. Effects of temperature |
title_fullStr |
Electrochemistry of active chromium. Part III. Effects of temperature |
title_full_unstemmed |
Electrochemistry of active chromium. Part III. Effects of temperature |
title_sort |
electrochemistry of active chromium. part iii. effects of temperature |
publisher |
Serbian Chemical Society |
series |
Journal of the Serbian Chemical Society |
issn |
0352-5139 |
publishDate |
2003-11-01 |
description |
It was shown that the temperature in the range 20 65 ºC has considerable effects on the electrochemical anodic dissolution of chromium in the active potential range as well as on the electrochemical hydrogen evolution reactions on bare and oxide covered chromium surfaces. Also, the chemical dissolution of chromium is strongly affected. The apparent energy of activation for anodic dissolution is 63.1 kJ mol-1, for hydrogen evolution on a bare Cr surface 19.5 kJ mol-1, for the same reaction on an oxide covered surface 44.0 kJ mol-1 and for the chemical (anomalous) dissolution 66.9 kJ mol-1. The temperature dependences of the total corrosion rate, and the electrochemical corrosion rate alone, are presented in polynomial forms with the appropriate constants obtained by the best fit of the experimental data. For the hydrogen evolution reaction on both bare and oxide covered chromium, the Volmer-Heyrovsky reaction mechanism with the second step as rate determining was proposed. |
topic |
chromium anodic dissolution anomalous dissolution hydrogen evolution sulfuric acid effect of temperature energy of activation |
url |
http://www.shd.org.yu/HtDocs/SHD/Vol68/No11/V68-No11-11.pdf |
work_keys_str_mv |
AT jppopic electrochemistryofactivechromiumpartiiieffectsoftemperature AT dmdrazic electrochemistryofactivechromiumpartiiieffectsoftemperature |
_version_ |
1716776271367634944 |