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|Ultima descărcare din IBN:|
| SM ISO690:2012|
SIDEL’NIKOVA, Svetlana; IUŞCENCO, Serghei; DIKUSAR, Aleksandr. Morphology, Structure, and Composition of Coatings at Electrodeposition of Black Nickel . In: Surface Engineering and Applied Electrochemistry. 2009, nr. 4(45), pp. 334-341. ISSN 1068-3755.
|Surface Engineering and Applied Electrochemistry|
|Numărul 4(45) / 2009 / ISSN 1068-3755 /ISSNe 1934-8002|
We present the electrolyte composition and the conditions of the electrodeposition with the aim to produce black nickel coatings on the surface of a piece manufactured of steel alloy, including the inner surface of a small diameter hole (3.4–5.0 mm). The method used of the coating production involves the application of two regimes of electrodeposition from one bath containing salts of nickel and zinc, a complexing agent (ammonium thiocyanate), and boric acid. The first regime allows one to produce a fine-grained layer with a high concentration of nickel, and the second one (functional) includes a high concentration of zinc. The produced coatings also contain oxides and sulfides and are amorphous, as the X-ray analysis shows.