The effect of the epsilon-caprolactam concentration on the electrodeposition of nickel-polymer coatings

It is shown that an increase in epsilon -caprolactam concentration in sulfa te nickel-plating baths enhances its adsorption on Ni cathode, which is fol lowed by the formation of its complexes with nickel ions in the solution. T he first process decelerates the electrode reaction, and the second one fac ilitates it. In the interval of the maximum deceleration of the process, ni ckel-polymer coatings with the greatest content of epsilon -caprolactam and the highest surface conductivity, substantially exceeding that of pure met al, are formed.