Scholarlink

<p>Aluminum-magnesium (Al–Mg) alloys were potentiostatically electrodeposited on copper using Al anode at 180&#xa0;°C from 62AlCl<sub>3</sub> + 17NaCl + 15KCl + 6MgCl<sub>2</sub> electrolyte. The depositions are categorized into two groups based on current density-time curves and deposit compositions. Group 1 corresponds to overpotentials from − 1.05 to − 1.10&#xa0;V, and Group 2 from − 1.15 to − 1.30&#xa0;V. Morphologies within Group 1 possess almost pure Al and coarsen with overpotential; while those in Group 2 possess Al and Mg, and refine with overpotential. Based on electrochemical, compositional, and spectral analyses, a generic deposition scheme is proposed. Mathematical variables in this scheme are adjusted rendering it suitable for both groups. Sources of Al for deposition are <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_4094_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="52" /> </InlineMediaObject> <EquationSource Format="TEX">\({{\text{Al}}_{2}\text{Cl}}_{7}^{-}\)</EquationSource> </InlineEquation>, and <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_4094_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{AlCl}}_{4}^{-}\)</EquationSource> </InlineEquation>; that of Mg is MgCl<sub>2</sub> (possibly forming complexes in electrolyte). Al anodic dissolution occurs significantly in Group 1. Na(AlCl<sub>4</sub>) formation and Cl<sub>2</sub> evolution occur at anode in Group 2. The proposed scheme is used to devise the following corollaries: (i) Al deposits preferentially in both groups; (ii) Mg deposition is prerequisite for Na(AlCl<sub>4</sub>) formation; (iii) Deposited Mg is curtailed to maximum of ~ 4.02&#xa0;at.% by Na(AlCl<sub>4</sub>); and (iv) A minimum threshold exists for Al/Mg deposit composition ratios. The scheme and corollaries answer questions of practical and fundamental importance.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Electrodeposition of Al–Mg alloys from chloride-based molten salts

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月30日

查看全文
  • Sreesvarna Bhaskaramohan,
  • Manepalli J. N. V. Prasad,
  • G. V. Dattu Jonnalagadda,
  • Sankara Sarma V. Tatiparti

摘要

Aluminum-magnesium (Al–Mg) alloys were potentiostatically electrodeposited on copper using Al anode at 180 °C from 62AlCl3 + 17NaCl + 15KCl + 6MgCl2 electrolyte. The depositions are categorized into two groups based on current density-time curves and deposit compositions. Group 1 corresponds to overpotentials from − 1.05 to − 1.10 V, and Group 2 from − 1.15 to − 1.30 V. Morphologies within Group 1 possess almost pure Al and coarsen with overpotential; while those in Group 2 possess Al and Mg, and refine with overpotential. Based on electrochemical, compositional, and spectral analyses, a generic deposition scheme is proposed. Mathematical variables in this scheme are adjusted rendering it suitable for both groups. Sources of Al for deposition are \({{\text{Al}}_{2}\text{Cl}}_{7}^{-}\) , and \({\text{AlCl}}_{4}^{-}\) ; that of Mg is MgCl2 (possibly forming complexes in electrolyte). Al anodic dissolution occurs significantly in Group 1. Na(AlCl4) formation and Cl2 evolution occur at anode in Group 2. The proposed scheme is used to devise the following corollaries: (i) Al deposits preferentially in both groups; (ii) Mg deposition is prerequisite for Na(AlCl4) formation; (iii) Deposited Mg is curtailed to maximum of ~ 4.02 at.% by Na(AlCl4); and (iv) A minimum threshold exists for Al/Mg deposit composition ratios. The scheme and corollaries answer questions of practical and fundamental importance.