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Based on cyanide-free electroplating technology for hard gold plating, with ethanol as an anti-solvent for precipitation of sodium gold sulfite (Na3Au(SO3)2), a process was developed for preparing Na3Au(SO3)2, consisting of non-aqua regia gold dissolution and sodium sulfite complexation and precipitation with ethanol. Then, a cyanide-free formula for hard gold electroplating with good comprehensive performance was optimized. With the sodium gold sulfite-sodium sulfite-EDTA-2Na as the plating system, the effects of different additives on bath and plating properties were investigated, and the metal turnovers (MTO) of the bath was also verified. The results show that an addition of sodium dihydrogen phosphate can increase the limiting current density but greatly reduce the electroplating efficiency; while an addition of ethylenediamine can obviously improve the deposition rate, and the obtained plating remains bright at the current density of 3 mA/cm2. In an experiment by employing the proposed electroplating technology with two addititives, a plating was prepared with a microhardness of 100HV-140HV, presenting dense structure with low porosity. The current efficiency of electroplating was above 98%and the MTO of bath exceeded 6. The bath system exhibited weak cathodic reaction.

, authors=Hengxing ZHANG1, 2, authorsList=Hengxing ZHANG, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314908042924224654, articleId=1314908040948707468, tenantId=1146029695717560320, journalId=1235980550691926019, language=CN, title=无氰电镀用亚硫酸金钠溶液及硬金镀层制备, columnId=1236276110049202322, journalTitle=矿冶工程杂志, columnName=材料, runingTitle=null, highlight=null, articleAbstract=

在硬金镀层无氰电镀技术基础上,基于乙醇可以反溶剂沉淀出亚硫酸金钠Na3Au(SO3)2,开发了非正王水溶金-Na2SO3络合-乙醇反溶剂沉淀制备Na3Au(SO3)2工艺和综合性能良好的无氰电镀硬金配方。基于亚硫酸金钠-亚硫酸钠-EDTA-2Na体系研究了不同添加剂对镀液和镀层的影响,并对镀液生命周期进行验证。结果表明:加入磷酸二氢钠能提高极限电流密度,但电镀效率显著降低;加入乙二胺能明显提高沉积速度,电流密度3 mA/cm2时,镀层质量仍为光亮。在试验范围内,所得镀层硬度100HV~140HV,镀层致密、孔隙度较低;电镀电流效率不低于98%,镀液生命周期达到6以上,镀液体系阴极副反应较少。

, authors=张恒星1, 2, authorsList=张恒星, authorCompany=null, correspAuthors=null, authorNote=

张恒星(1991-),男,河南郸城人,硕士,工程师,主要研究方向为有色金属冶炼和贵金属材料。E-mail:

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2.福建紫金贵金属材料有限公司,福建 上杭 364200, bio={"content":"

张恒星(1991-),男,河南郸城人,硕士,工程师,主要研究方向为有色金属冶炼和贵金属材料。E-mail:

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张恒星(1991-),男,河南郸城人,硕士,工程师,主要研究方向为有色金属冶炼和贵金属材料。E-mail:

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无氰电镀用亚硫酸金钠溶液及硬金镀层制备
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张恒星 1, 2
矿冶工程杂志 | 材料 2026,46(2): 210-214
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矿冶工程杂志 |材料 2026 , 46 (2) : 210 -214
无氰电镀用亚硫酸金钠溶液及硬金镀层制备
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张恒星(1991-),男,河南郸城人,硕士,工程师,主要研究方向为有色金属冶炼和贵金属材料。E-mail:

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张恒星(1991-),男,河南郸城人,硕士,工程师,主要研究方向为有色金属冶炼和贵金属材料。E-mail:

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张恒星1, 2
作者信息
  • 1.昆明理工大学,云南 昆明 650031
  • 2.福建紫金贵金属材料有限公司,福建 上杭 364200
作者简介:

张恒星(1991-),男,河南郸城人,硕士,工程师,主要研究方向为有色金属冶炼和贵金属材料。E-mail:

Preparation of Sodium Gold Sulfite for Cyanide Free Electroplating and Hard Gold Plating
Hengxing ZHANG1, 2
Affiliations
  • 1.Kunming University of Science and Technology, Kunming 650031, Yunnan, China
  • 2.Fujian Zijin Precious Metal Materials Co., Ltd., Shanghang 364200, Fujian, China
doi: 10.3969/j.issn.0253-6099.2026.02.035
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在硬金镀层无氰电镀技术基础上,基于乙醇可以反溶剂沉淀出亚硫酸金钠Na3Au(SO3)2,开发了非正王水溶金-Na2SO3络合-乙醇反溶剂沉淀制备Na3Au(SO3)2工艺和综合性能良好的无氰电镀硬金配方。基于亚硫酸金钠-亚硫酸钠-EDTA-2Na体系研究了不同添加剂对镀液和镀层的影响,并对镀液生命周期进行验证。结果表明:加入磷酸二氢钠能提高极限电流密度,但电镀效率显著降低;加入乙二胺能明显提高沉积速度,电流密度3 mA/cm2时,镀层质量仍为光亮。在试验范围内,所得镀层硬度100HV~140HV,镀层致密、孔隙度较低;电镀电流效率不低于98%,镀液生命周期达到6以上,镀液体系阴极副反应较少。

镀金  /  无氰电镀  /  亚硫酸金钠  /  硬金镀层  /  添加剂  /  生命周期

Based on cyanide-free electroplating technology for hard gold plating, with ethanol as an anti-solvent for precipitation of sodium gold sulfite (Na3Au(SO3)2), a process was developed for preparing Na3Au(SO3)2, consisting of non-aqua regia gold dissolution and sodium sulfite complexation and precipitation with ethanol. Then, a cyanide-free formula for hard gold electroplating with good comprehensive performance was optimized. With the sodium gold sulfite-sodium sulfite-EDTA-2Na as the plating system, the effects of different additives on bath and plating properties were investigated, and the metal turnovers (MTO) of the bath was also verified. The results show that an addition of sodium dihydrogen phosphate can increase the limiting current density but greatly reduce the electroplating efficiency; while an addition of ethylenediamine can obviously improve the deposition rate, and the obtained plating remains bright at the current density of 3 mA/cm2. In an experiment by employing the proposed electroplating technology with two addititives, a plating was prepared with a microhardness of 100HV-140HV, presenting dense structure with low porosity. The current efficiency of electroplating was above 98%and the MTO of bath exceeded 6. The bath system exhibited weak cathodic reaction.

gold-plating  /  cyanide-free electroplating  /  sodium gold sulfite  /  hard gold planting  /  additive  /  MTO
张恒星. 无氰电镀用亚硫酸金钠溶液及硬金镀层制备. 矿冶工程杂志, 2026 , 46 (2) : 210 -214 . DOI: 10.3969/j.issn.0253-6099.2026.02.035
Hengxing ZHANG. Preparation of Sodium Gold Sulfite for Cyanide Free Electroplating and Hard Gold Plating[J]. Mining and Metallurgical Engineering, 2026 , 46 (2) : 210 -214 . DOI: 10.3969/j.issn.0253-6099.2026.02.035

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doi: 10.3969/j.issn.0253-6099.2026.02.035
  • 接收时间:2025-10-20
  • 首发时间:2026-10-08
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  • 收稿日期:2025-10-20
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    1.昆明理工大学,云南 昆明 650031
    2.福建紫金贵金属材料有限公司,福建 上杭 364200
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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