Electrodeposition of Ni-P Alloy from Electrolyte with Additives of Lactic and Phosphorous Acids

Issue 3(81) 2016
Pages 55-62

A.B. Drovosekov, V.M. Krutskikh, A.D. Aliev

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow

Keywords: electrodeposition, Ni–P alloy

Electrodeposition of Ni–P coatings from electrolytes with additives of lactic and phosphorous acids is researched. It is shown that the formation of Ni–P alloy occurs with high current efficient (up to 87%). Content of phosphorus in Ni–P alloy can be varied widely from 6.1 to 22.2 at. % in dependence on electrolyte pH, Н3РО3 concentration and cathode current density. Increase of phosphorus content in Ni–P alloys alters noticeably their structure, reducing grain size and contributing to the gradual transition from a crystalline state in amorphous.