Dissolution of chromium in sulfuric acid
By combining electrochemical corrosion rate measurements and spectrophotometric analysis of the electrolyte it was shown that at room temperature chromium dissolves in deaerated 0.1M Na2SO4 + H2SO4 (pH1) solution as Cr(II) and Cr(III) ions in he ratio Cr(II):Cr(III)≈7:1. This process was stable over...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2002-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2002/0352-51390211777D.pdf |
| _version_ | 1818329851930607616 |
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| author | Dražić Dragutin M. Popić Jovan P. |
| author_facet | Dražić Dragutin M. Popić Jovan P. |
| author_sort | Dražić Dragutin M. |
| collection | DOAJ |
| description | By combining electrochemical corrosion rate measurements and spectrophotometric analysis of the electrolyte it was shown that at room temperature chromium dissolves in deaerated 0.1M Na2SO4 + H2SO4 (pH1) solution as Cr(II) and Cr(III) ions in he ratio Cr(II):Cr(III)≈7:1. This process was stable over 4h without any detectable change. The total corrosion rate of chromium calculated from the analytical data is about 12 times higher, than that determined electrochemically by cathodic Tafel line extrapolation to the corrosion potential. This finding was confirmed by applying the weight-loss method for the determination of the corrosion rate. This enormous difference between these experimentally determined corrosion rates can be explained by the rather fast, "anomalous" dissolution process proposed by Kolotyrkin and coworkers (chemical reaction of Cr with H2O molecules) occurring simultaneously with the electrochemical corrosion process. |
| first_indexed | 2024-12-13T12:54:38Z |
| format | Article |
| id | doaj.art-eff22d63387544e682572a5391f8e166 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-13T12:54:38Z |
| publishDate | 2002-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-eff22d63387544e682572a5391f8e1662022-12-21T23:45:13ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212002-01-01671177778210.2298/JSC0211777D0352-51390211777DDissolution of chromium in sulfuric acidDražić Dragutin M.0Popić Jovan P.1Institute of Chemistry, Technology and Metallurgy - Center for Electrochemistry, BelgradeInstitute of Chemistry, Technology and Metallurgy - Center for Electrochemistry, BelgradeBy combining electrochemical corrosion rate measurements and spectrophotometric analysis of the electrolyte it was shown that at room temperature chromium dissolves in deaerated 0.1M Na2SO4 + H2SO4 (pH1) solution as Cr(II) and Cr(III) ions in he ratio Cr(II):Cr(III)≈7:1. This process was stable over 4h without any detectable change. The total corrosion rate of chromium calculated from the analytical data is about 12 times higher, than that determined electrochemically by cathodic Tafel line extrapolation to the corrosion potential. This finding was confirmed by applying the weight-loss method for the determination of the corrosion rate. This enormous difference between these experimentally determined corrosion rates can be explained by the rather fast, "anomalous" dissolution process proposed by Kolotyrkin and coworkers (chemical reaction of Cr with H2O molecules) occurring simultaneously with the electrochemical corrosion process.http://www.doiserbia.nb.rs/img/doi/0352-5139/2002/0352-51390211777D.pdfchromiumcorrosionacid solutionscorrosion productsanomalous dissolution. |
| spellingShingle | Dražić Dragutin M. Popić Jovan P. Dissolution of chromium in sulfuric acid Journal of the Serbian Chemical Society chromium corrosion acid solutions corrosion products anomalous dissolution. |
| title | Dissolution of chromium in sulfuric acid |
| title_full | Dissolution of chromium in sulfuric acid |
| title_fullStr | Dissolution of chromium in sulfuric acid |
| title_full_unstemmed | Dissolution of chromium in sulfuric acid |
| title_short | Dissolution of chromium in sulfuric acid |
| title_sort | dissolution of chromium in sulfuric acid |
| topic | chromium corrosion acid solutions corrosion products anomalous dissolution. |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2002/0352-51390211777D.pdf |
| work_keys_str_mv | AT drazicdragutinm dissolutionofchromiuminsulfuricacid AT popicjovanp dissolutionofchromiuminsulfuricacid |