Chemija / Chemistry
 ISSN 0235-7216 ISSN 2424-4538 (online) |
2010 m. Nr. 1 Structural study of Ag layers deposited from solution of silver sulphite complexes
When silver coating deposition proceeds via the discharge of silver sulphite complexes, this coating is of a rather good quality. The application of cathodic current pulses was found to increase the degree of microcrystallinity of Ag layers. This fact can be illustrated, particularly, by a decrease of the dimensions of Ag crystallites from 0.7–5 μm at a constant current to 0.1–0.5 μm at a pulse current, i. e. approximately tenfold. Unfortunately, the problem of porosity of Ag coatings electrodeposited from sulphite solutions remains unsolved. The porosity of these coatings makes 1–3% of its surface. Keywords: silver, sulphite solutions, SEM, X-ray microanalyzer, porosity |
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