| Autor: | I. K. Marshakov, N. M. Tutukina, I. D. Zartsyn, V. Kreizer |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Range (particle radiation)
Organic Chemistry Inorganic chemistry Metals and Alloys chemistry.chemical_element Overpotential Chloride Oxygen Copper Surfaces Coatings and Films chemistry.chemical_compound chemistry Materials Chemistry medicine Erosion corrosion of copper water tubes Hydrogen peroxide Dissolution medicine.drug |
| Zdroj: | Protection of Metals. 39:30-33 |
| ISSN: | 0033-1732 |
| DOI: | 10.1023/a:1021935023079 |
| Popis: | The effect of oxygen on the anomalous dissolution of copper in acidic chloride media is studied. An increase in the copper corrosion rate during cathodic polarization in the potential range from –0.4 to –0.7 V is attributed to stirring of the near-electrode layer by evolving hydrogen bubbles. An addition of surface-active tetrabutylammonium iodide shifts the overpotential of hydrogen evolution and eliminates this effect. The copper dissolution rate during cathodic polarization is shown to be directly proportional to the reduction rate of dissolved oxygen. It is shown experimentally that H2O2 does not affect the dissolution rate of copper during cathodic polarization. The latter fact makes it possible to assume that oxygen reduction stages, which involve hydrogen peroxide, do not affect the anomalous dissolution of copper. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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