A number of electrolytes have been studied to obtain a nickel coating on a graphite base of a resistive element with good adhesion, strong glitter, sufficiently wear-resistant and uniform in thickness. The modes of operation of electrolytes have been determined, nickel coatings have been studied for appearance, adhesion and internal stresses. It is established that for the cylindrical shape of the coated product it is necessary to apply coatings with internal compression stresses = 0… (-70) MPa. The scattering capacity and current output for the studied electrolytes were calculated. To achieve uniform coating thickness, it is necessary to use an electrolyte with a scattering capacity close to 70-90%. In the case of sulfuric acid electrolytes, the scattering capacity reaches 20-30%. In this regard, a cylindrical shape of the anode is proposed, which corresponds in shape to the resistor (cathode). This is a so-called artificial method of increasing the scattering capacity, and in the case of deposition from sulfuric acid electrolytes, it is very effective. Based on the laboratory plant, a technology has been developed for the industrial application of a glittery nickel coating on resistive elements of various ratings.
Budaragin et al. (Wed,) studied this question.