Effect of electrolysis conditions on the morphology and crystal orientation of zinc electrodeposit

Hiroaki Nakano, Kuniyasu Araga, Masatoshi Iwai, Junzi Kawahuku

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The effect of electrolysis condition on the morphology and crystal orientation of zinc electrodeposit was investigated by using the polycrystal commercial low carbon Al-killed steel sheet as a base material and the sulfate bath under the current density of 50-200A/dm 2, flow rate of 1-2m/s and bath temperature of 50-70°C. Under the conditions where overvoltage of electrodeposit is high, such as high current density, low flow rate and low temperature, heteroepitaxy of steel/zinc decreases, so that zinc crystals become fine and random in size and growth direction. Under the high overvoltage conditions, orientation indexes of (0002) Zn and (101̄3) Zn decrease but those of (101̄1) Zn and (101̄0) Zn increase. When zinc electrodeposits grow heteroepitaxially, (0002) Zn and (101̄3) Zn planes are preferred. From these results, zinc electrodeposits are thought to progress as follows : At initial stage of plating, zinc electrodeposits grow heteroepitaxially at preferred orientations of (0002) Zn and (101̄3) Zn. Then, random growth of zinc begins partly on the (0002) Zn and (10̄1̄0) Zn and finally random growth of (101̄1) Zn and (101̄0) Zn occurs partly on the (0002) Zn and (101̄3) Zn.

Original languageEnglish
Pages (from-to)13-18
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume83
Issue number12
Publication statusPublished - 1997
Externally publishedYes

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electrolysis
Electrolysis
Crystal orientation
Zinc
zinc
crystals
overvoltage
Current density
Zinc plating
Flow rate
baths
flow velocity
steels
current density
Steel
Polycrystals
Steel sheet
Epitaxial growth
Sulfates
polycrystals

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

Cite this

Effect of electrolysis conditions on the morphology and crystal orientation of zinc electrodeposit. / Nakano, Hiroaki; Araga, Kuniyasu; Iwai, Masatoshi; Kawahuku, Junzi.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 83, No. 12, 1997, p. 13-18.

Research output: Contribution to journalArticle

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