The present paper considers the electrodeposition of CoRe alloys from a citrate and a citrate-pyrophosphate electrolyte. It has been shown that coatings containing up to 67 at.% Re are deposited from a citrate electrolyte with a current efficiency of 20–40%, and that the use of a citrate-pyrophosphate electrolyte allows the current efficiency for the alloy to be increased, but the coating contains a smaller amount of rhenium – 13.5 аt.%. The corrosion tests carried out in solutions of 3.5% NaCl and 1 M KOH show that the optimal deposition current density in a citrate electrolyte is 30–40 mА·сm⁻², at which the most fine-crystalline coatings is formed, which has a corrosion resistance of 3.0 and 1.6 kΩ·сm² for corrosive solutions. The coating deposited from a citrate-pyrophosphate electrolyte is an interstitial solid solution of rhenium in cobalt, which allows a high corrosive resistance to be achieved, with the high cobalt content giving soft magnetic properties to alloys. The CoRe alloys show electrocatalytic activity in the hydrogen evolution reaction and allow one to reduce by an order of magnitude the exchange current density and by 220 mV the hydrogen overpotential relative to cobalt.

本文考虑了柠檬酸和柠檬酸焦磷酸盐电解质对CoRe合金的电沉积。研究表明，从柠檬酸盐电解质中沉积的Re含量高达67 at。％的涂层，电流效率为20–40％，并且使用柠檬酸盐-焦磷酸盐电解质可以提高合金的电流效率，但涂层中的smaller含量较少，为13.5％。在3.5％NaCl和1 M KOH溶液中进行的腐蚀测试表明，柠檬酸盐电解质中的最佳沉积电流密度为30–40mА·сm ^-2，在该电流下形成最细的结晶涂层，该涂层具有3.0和1.6千欧姆的耐腐蚀性·сm ²用于腐蚀性溶液。由柠檬酸盐-焦磷酸盐电解质沉积的涂层是rh在钴中的间隙固溶体，可实现高耐腐蚀性，而高钴含量可为合金提供软磁性能。CoRe合金在氢气析出反应中显示出电催化活性，可将交换电流密度降低一个数量级，并将相对于钴的氢气超电势降低220 mV。