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 0.1 M Na2SO4 + H2SO4 (pH 1) solution as Cr(II) and Cr(III) ions in he ratio Cr(II) : Cr(III) @ 7 : 1. This process was sta...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2002-11-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/HtDocs/SHD/Vol67/No11/V67-No11-09.pdf |
| _version_ | 1811299078886129664 |
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| author | J. P. POPIC D. M. DRAZIC |
| author_facet | J. P. POPIC D. M. DRAZIC |
| author_sort | J. P. POPIC |
| 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 0.1 M Na2SO4 + H2SO4 (pH 1) solution as Cr(II) and Cr(III) ions in he ratio Cr(II) : Cr(III) @ 7 : 1. This process was stable over 4 h 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 | 2024-04-13T06:29:52Z |
| format | Article |
| id | doaj.art-1986ddee253543f58250b95fab3d171c |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-04-13T06:29:52Z |
| publishDate | 2002-11-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-1986ddee253543f58250b95fab3d171c2022-12-22T02:58:11ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392002-11-016711777782Dissolution of chromium in sulfuric acidJ. P. POPICD. M. DRAZICBy combining electrochemical corrosion rate measurements and spectrophotometric analysis of the electrolyte it was shown that at room temperature chromium dissolves in deaerated 0.1 M Na2SO4 + H2SO4 (pH 1) solution as Cr(II) and Cr(III) ions in he ratio Cr(II) : Cr(III) @ 7 : 1. This process was stable over 4 h 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.shd.org.yu/HtDocs/SHD/Vol67/No11/V67-No11-09.pdfchromiumcorrosionacid solutionscorrosion productsanomalous dissolution |
| spellingShingle | J. P. POPIC D. M. DRAZIC 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.shd.org.yu/HtDocs/SHD/Vol67/No11/V67-No11-09.pdf |
| work_keys_str_mv | AT jppopic dissolutionofchromiuminsulfuricacid AT dmdrazic dissolutionofchromiuminsulfuricacid |