Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels
Nowadays, choosing a corrosion inhibitor is not only based on efficiency, but must also consider the toxicity of the compound, the impact on the environment, and, obviously, the regulations in the field. In the last two decades, a special class of substances has begun to be studied, namely polyoxome...
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MDPI AG
2023-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/24/7600 |
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| author | Gabriela Elena Badea Alexandrina Fodor Anda Ioana Grațiela Petrehele Ioana Maior Monica Toderaș Claudia Mona Morgovan |
| author_facet | Gabriela Elena Badea Alexandrina Fodor Anda Ioana Grațiela Petrehele Ioana Maior Monica Toderaș Claudia Mona Morgovan |
| author_sort | Gabriela Elena Badea |
| collection | DOAJ |
| description | Nowadays, choosing a corrosion inhibitor is not only based on efficiency, but must also consider the toxicity of the compound, the impact on the environment, and, obviously, the regulations in the field. In the last two decades, a special class of substances has begun to be studied, namely polyoxometalates (POMs). Their electronic properties and redox characteristics make the polyoxometalates potential candidates to be used in many electrochemical processes, and as potential corrosion inhibitors. Electrochemical methods such as a Tafel extrapolation plot, chronopotentiometry, or gravimetry have been used to establish the capacity of corrosion inhibition of S235 and SS304 steels in the presence of phosphovanadomolibdate acid (@PMoV) and phosphovanadotungstate acid (@PWV) in 0.5 M sulphuric acid solution. The inhibition efficiency for S235 steel is about 90.6% for @PMoV, and 69.5% for @PWV after 24 h of immersion. In the case of SS304 steel, polyoxometalates have similar effects: the inhibition degree, as a function of Flade potential, is 4.66 for @PMoV; better than 3.26 for @PWV, with both proving the passivant effect. |
| first_indexed | 2024-03-08T20:33:37Z |
| format | Article |
| id | doaj.art-25fd2868def244c7ba0224b836c6a8be |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-08T20:33:37Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-25fd2868def244c7ba0224b836c6a8be2023-12-22T14:22:47ZengMDPI AGMaterials1996-19442023-12-011624760010.3390/ma16247600Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for SteelsGabriela Elena Badea0Alexandrina Fodor1Anda Ioana Grațiela Petrehele2Ioana Maior3Monica Toderaș4Claudia Mona Morgovan5Department of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, RomaniaDepartment of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, RomaniaDepartment of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, RomaniaDepartment of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 313 Splaiul Independentei, 060042 Bucharest, RomaniaDepartment of Physics, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, RomaniaDepartment of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, RomaniaNowadays, choosing a corrosion inhibitor is not only based on efficiency, but must also consider the toxicity of the compound, the impact on the environment, and, obviously, the regulations in the field. In the last two decades, a special class of substances has begun to be studied, namely polyoxometalates (POMs). Their electronic properties and redox characteristics make the polyoxometalates potential candidates to be used in many electrochemical processes, and as potential corrosion inhibitors. Electrochemical methods such as a Tafel extrapolation plot, chronopotentiometry, or gravimetry have been used to establish the capacity of corrosion inhibition of S235 and SS304 steels in the presence of phosphovanadomolibdate acid (@PMoV) and phosphovanadotungstate acid (@PWV) in 0.5 M sulphuric acid solution. The inhibition efficiency for S235 steel is about 90.6% for @PMoV, and 69.5% for @PWV after 24 h of immersion. In the case of SS304 steel, polyoxometalates have similar effects: the inhibition degree, as a function of Flade potential, is 4.66 for @PMoV; better than 3.26 for @PWV, with both proving the passivant effect.https://www.mdpi.com/1996-1944/16/24/7600S235 steelSS304 steelcorrosion inhibitorpassivationpolyoxometalates |
| spellingShingle | Gabriela Elena Badea Alexandrina Fodor Anda Ioana Grațiela Petrehele Ioana Maior Monica Toderaș Claudia Mona Morgovan Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels Materials S235 steel SS304 steel corrosion inhibitor passivation polyoxometalates |
| title | Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels |
| title_full | Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels |
| title_fullStr | Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels |
| title_full_unstemmed | Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels |
| title_short | Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels |
| title_sort | evaluation of phosphopolyoxometalates with mixed addenda mo w v as corrosion inhibitors for steels |
| topic | S235 steel SS304 steel corrosion inhibitor passivation polyoxometalates |
| url | https://www.mdpi.com/1996-1944/16/24/7600 |
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