Morphology, Structure, and Composition of Coatings at Electrodeposition of Black Nickel
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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.
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Surface Engineering and Applied Electrochemistry
Numărul 4(45) / 2009 / ISSN 1068-3755 /ISSNe 1934-8002

Morphology, Structure, and Composition of Coatings at Electrodeposition of Black Nickel

Pag. 334-341

Sidel’nikova Svetlana, Iuşcenco Serghei, Dikusar Aleksandr
 
Institute of Applied Physics, Academy of Sciences of Moldova
 
Disponibil în IBN: 10 decembrie 2013


Rezumat

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.