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Co-Cu合金电镀工艺研究及其后续尖晶石涂层的制备探索
Alternative TitlePreparation of Cu-Co Spinel Coatings on 430 Stainless Steel by Electro-deposition and Post-oxidation
张雪; 曾潮流
2018
Source Publication腐蚀科学与防护技术
ISSN1002-6495
Volume30.0Issue:1.0Pages:1-7
Abstract以柠檬酸盐为络合剂在铁素体不锈钢表面电镀Cu-Co合金,重点研究镀液pH值和沉积电位对电镀过程和镀层微观结构的影响。结果表明,在pH值为46镀液中Cu2+与柠檬酸盐几乎完全络合,而Co2+则以简单离子存在,络合Cu2+与简单Co2+的沉积电位相近,可实现Cu-Co合金共沉积。当pH值为4时镀层成分稳定性较佳。在pH值为4、沉积电位为-0.9-1.1 VSCE时,随着电位值的增大镀层中Co/Cu(原子分数)相应增加。当沉积电位为-1 VSCE时,镀层中Co/Cu约为2。在800℃预氧化2 h后镀层转变为均匀致密、与基体之间结合良好的Cu-Co尖晶石涂层。涂层由三层结构组成:外层为一薄层Cu O;中间为一层较厚的Cu0.92Co2.08O4尖晶石;内层为连续的Co3O4。
Other AbstractCu-Co alloy coatings can be prepared on ferritic stainless steel by electro-deposition in Co- and Cu-sulfate bath with citrate as complex agent. The effect of pH value of the electrolyte and the electrodeposition potential on the deposition process and microstructure of the coatings was investigat- ed. In a range of pH value 4-6, Cu2+ can coordinate with citrate almost completely, while Co2. remains to exist as simple ions. Since the deposition potential of the complexing Cu2+ is similar to that of the simple Co2+, co-deposition of Cu-Co alloy can be realized in the electrolyte with pH value within the above range. Coatings with a more stable chemical composition are obtained at pH value of 4. At pH=4 and deposition potential of-0.9--1.1 VscE, the Co/Cu (atomic fraction) increases with the increasing deposition potential. An optimal composition with Co/Cu of about 2 is acquired at pH=4 and deposition potential of-1 VscE. Af- ter oxidation at 800℃ in air for 2 h, the Co-Cu alloy coating was converted into an adherent and compact three-layered scale composed of an external thinner CuO layer, a middle thicker Cu092Co20804 layer and an inner Co2O, layer.
Keyword尖晶石涂层 Cu-Co合金 电镀 pH值 沉积电位
Indexed ByCSCD
Language中文
CSCD IDCSCD:6162579
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155147
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
张雪,曾潮流. Co-Cu合金电镀工艺研究及其后续尖晶石涂层的制备探索[J]. 腐蚀科学与防护技术,2018,30.0(1.0):1-7.
APA 张雪,&曾潮流.(2018).Co-Cu合金电镀工艺研究及其后续尖晶石涂层的制备探索.腐蚀科学与防护技术,30.0(1.0),1-7.
MLA 张雪,et al."Co-Cu合金电镀工艺研究及其后续尖晶石涂层的制备探索".腐蚀科学与防护技术 30.0.1.0(2018):1-7.
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