Dissolution mechanism and partial electrode processes at infralow frequency AC polarization of brasses in chloride media. I. α-brass Cu20Zn
| Autor: | I. K. Marshakov, V. Yu. Kondrashin, O. Yu. Kuksina |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Chemistry
Organic Chemistry Inorganic chemistry Metals and Alloys chemistry.chemical_element Chloride Copper Surfaces Coatings and Films Cathodic protection Anode Brass visual_art Electrode Materials Chemistry medicine visual_art.visual_art_medium Polarization (electrochemistry) Dissolution medicine.drug |
| Zdroj: | Protection of Metals. 43:118-124 |
| ISSN: | 1608-327X 0033-1732 |
| DOI: | 10.1134/s003317320702004x |
| Popis: | Being typical of a steady-state anodic polarization, the uniform dissolution of α-brass Cu20Zn is retained for the anodic half-period in the pulsed mode (f = 0.17 Hz). At such an ac polarization, the dissolution is alternated with the copper deposition in the cathodic half-periods to form a loose fine-grain deposit at the electrode. Under severe hydrodynamic conditions, no copper deposit is formed. With an increase in the current in the cathodic half-periods, the pH of a near-electrode solution layer increases, thus changing the anodic processes. Namely, the oxidation of brass components to soluble chloride complexes gives place to the formation of poorly soluble products. |
| Databáze: | OpenAIRE |
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