Physicochemical Model of Selection of Complex Compounds for Electroless Metal Plating

A physicochemical model of the choice of a ligand for the electroless deposition of metal–phosphorus alloys is proposed based on determining the conditions for electrochemical reactions that cause the formation of the alloy and minimizing possible side reactions that impede the quality of the deposi...

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Bibliographic Details
Published in:Theoretical foundations of chemical engineering 2020-05, Vol.54 (3), p.474-481
Main Authors: Vinokurov, E. G., Mukhametova, G. M., Burukhina, T. F., Skopintsev, V. D., Meshalkin, V. P.
Format: Article
Language:English
Subjects:
Chemical reactions
Chemistry
Chemistry and Materials Science
Complex compounds
Coordination compounds
Electroless nickel plating
Industrial Chemistry/Chemical Engineering
Ligands
Stability
Stability constants
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Summary:A physicochemical model of the choice of a ligand for the electroless deposition of metal–phosphorus alloys is proposed based on determining the conditions for electrochemical reactions that cause the formation of the alloy and minimizing possible side reactions that impede the quality of the deposition process. Based on the physicochemical model, the optimal range of values of the stability constants and pH was determined for electroless nickel plating. It is shown that, for the pH range 7–9, which corresponds to the maximum deposition rates, stability constants take values from 5 to 10; carrying out the process in more alkaline solutions requires the use of more stable complexes. The predictive ability of the model is confirmed by experimental studies of the process of electroless nickel plating from solutions of various ligand compositions.
ISSN:0040-5795
1608-3431
DOI:10.1134/S0040579520030136