ジンケート浴からの Zn-Ni 合金電析挙動に及ぼす光沢剤と浴温の相乗作用

Translated title of the contribution: Synergistic Effect of Brightener and Solution Temperature on the Electrodeposition Behavior of Zn-Ni Alloy from Alkaline Zincate Solution

Sung Hwa Bae, Satoshi Oue, Yu Ki Taninouchi, Injoon Son, Hiroaki Nakano

Research output: Contribution to journalArticlepeer-review

Abstract

Zn–Ni alloys were electrodeposited on a Cu electrode at 10–5000 A·m−2, 5 × 104 C·m−2, and 293, 313 and 333 K in unagitated zincate solutions containing the reaction product of epichlorohydrin and imidazole (IME) as a brightener. The synergistic effect of IEM and solution temperature on the deposition behavior of Zn–Ni alloy was investigated. The transition current density, at which the deposition behavior shifted from the normal type to anomalous ones, decreased with IME at 293 K, but didn’t change regardless of IME addition at 313 and 333 K. The suppression effect of IME on the Zn and Ni depositions during alloy deposition was observed at 293 K, while at 313 and 333 K, the suppression effect was decreased on the Zn deposition but was maintained on the Ni deposition. Therefore, Ni content in deposits significantly decreased with IME as temperature increased. The current efficiency for Zn deposition significantly decreased with IME at 293 K, while the degree of decrease was small at 313 and 333 K. The content of C in deposits was highest at 293 K, and decreased with increasing solution temperature, indicating that the adsorption ability of IME on the cathode decreases with increasing temperature. As a result, the suppression effect of IME on the Zn deposition seems to decrease with increasing temperature. The gloss of deposited films was highest at 293 K. This is attributed to adsorption ability of IME being large at 293 K and deposited films with fine crystals becoming smooth.

Translated title of the contributionSynergistic Effect of Brightener and Solution Temperature on the Electrodeposition Behavior of Zn-Ni Alloy from Alkaline Zincate Solution
Original languageJapanese
Pages (from-to)268-281
Number of pages14
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume108
Issue number4
DOIs
Publication statusPublished - 2022

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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