Effect of Benzotriazole on the Hydrogen Absorption by Iron
| Autor: | M. H. Abd Elhamid, Badr G. Ateya, Howard W. Pickering |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Benzotriazole
Hydrogen Renewable Energy Sustainability and the Environment Inorganic chemistry chemistry.chemical_element Sulfuric acid Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Crystallography Corrosion inhibitor chemistry Transition metal Thiourea Sodium sulfate Materials Chemistry Electrochemistry Hydrogen embrittlement |
| Zdroj: | Journal of The Electrochemical Society. 144:L58-L61 |
| ISSN: | 1945-7111 0013-4651 |
| Popis: | The results presented show that benzotriazole (BTA) inhibits the absorption of hydrogen into iron which is cathodically polarized in an acid (pH {approx_equal} 1.7) sulfate solution. Analysis of the results indicates that BTA inhibits also the hydrogen evolution reaction, although it does not change its mechanism, which is shown to be proton discharge-Tafel recombination. However, BTA shifts the position of the equilibrium, H{sub ads} {r_equilibrium} H{sub abs}, toward the left side and hence leads to a decrease in the concentration of H{sub abs} within the lattice. The extent of this decrease depends on the BTA concentration, e.g., about fivefold at 1 mM and tenfold at 10 mM BTA. This effect is opposite to that reported for inhibitors such as thiourea which inhibits the hydrogen evolution reaction and yet promotes hydrogen permeation. |
| Databáze: | OpenAIRE |
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