Abstract
The essay is about studies of the electrochemical reduction of nickel ions from a glycine electrolyte by the method of recording cyclic and linear potentiodynamic polarization curves. The effect of the concentration of the main components, potential sweep and temperature on the electrodeposition process of nickel has been studied. It has been found that at the beginning of the process the electrodeposition of the nickel ions from glycine electrolyte is controlled by electrochemical polarization, which turns into concentration polarization
Highlights
Nickel is one of the most used metals in the galvanic deposition process because of its high corrosion resistance and hardness
The results showed that the presence of glycine in the electrolyte reduces the corrosion resistance of the deposited nickel coatings
Glycine (H2N-CH2-COOH) is usually considered as a dipole ion, the structure of which protonates or deprotonates depending on the pH of the solution [13] and the equilibrium between them is shown in equation (1)
Summary
Nickel is one of the most used metals in the galvanic deposition process (electroplating) because of its high corrosion resistance and hardness It is used in a wide-ranging applications – in mechanical engineering, aerospace industry and electronics [1, 2]. The authors of [7] investigated the reduction of nickel ions from Watt's electrolyte and came to the conclusion that the process occurs in three stages: 1 – chemical reaction preceding the electrochemical reaction, 2 – beginning of the surface reactions with adsorption of intermediate products and 3 – diffusion of electroactive substances to the electrode. The effect of nickel concentration, potential sweep rate and temperature on the reduction process of nickel ions from glycine electrolytes has been investigated
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