2、45 ℃和10 g/L檸檬酸三銨。Ni-Fe-Co合金鍍層的鈷含量隨著鈷離子濃度的增加而線性增加，鍍層均為簡單的面心立方固溶體結構。隨著鍍層中鈷含量的增加，鍍層的耐腐蝕性能和硬度先升高后降低。Ni-Fe-13.51Co（質量分數(shù)）鍍層具有顯著的防腐蝕性能，其電荷轉移電阻為3031 Ω·cm2，腐蝕電流密度為5.754×10-6 A/cm2。"/>

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電沉積Ni-Fe-Co合金鍍層的微觀結構及耐腐蝕性能
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1.廣西大學 資源環(huán)境與材料學院，廣西 南寧 530004;2.廣西大學 化學化工學院，廣西 南寧 530004;3.廣西大學 廣西有色金屬及特色材料加工重點實驗室，廣西 南寧 530004;4.湖南科技大學 機電工程學院，湖南 湘潭 411201

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基金項目:

廣西科技重大專項 (AA18118030 and AA17204100)，湖南省教育廳重點項目（19A177）


Microstructure and Corrosion Resistance of Electrodepos-ited Ni-Fe-Co Alloy Coatings
Author:
Affiliation:

1.School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China;2.School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;3.Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China;4.School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

Fund Project:

Major Science and Technology Projects in Guangxi (AA18118030, AA17204100); Hunan Provincial Natural Science Foundation of China (19A177)

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    摘要:

    在穩(wěn)定的酸性檸檬酸鹽溶液中，在低碳鋼基體上電鍍獲得了Ni-Fe-Co合金鍍層，并研究了電鍍條件和鈷含量對鍍層性能的影響，得到了最佳鍍層工藝參數(shù)。利用掃描電子顯微鏡、能譜儀、電化學阻抗譜、極化曲線和數(shù)字顯微硬度計對合金鍍層進行了研究。結果顯示，合適的工藝參數(shù)是10 A/dm2、45 ℃和10 g/L檸檬酸三銨。Ni-Fe-Co合金鍍層的鈷含量隨著鈷離子濃度的增加而線性增加，鍍層均為簡單的面心立方固溶體結構。隨著鍍層中鈷含量的增加，鍍層的耐腐蝕性能和硬度先升高后降低。Ni-Fe-13.51Co（質量分數(shù)）鍍層具有顯著的防腐蝕性能，其電荷轉移電阻為3031 Ω·cm2，腐蝕電流密度為5.754×10-6 A/cm2。

    Abstract:

    Ni-Fe-Co alloy coatings were obtained on mild steel substrates by electrodeposition from stable acidic citrate solution. The effects of plating conditions and cobalt content on the coating performance were investigated? and the optimal electrodeposition pro-cess parameters were obtained. The alloy coatings were investigated by scanning electron microscope, energy dispersive spectrometer, electrochemical impedance spectrum, polarization curve, and digital microhardness meter. Results show that the suitable processing parameters are 10 A/dm2, 45 °C, and triammonium citrate of 10 g/L. The cobalt content of Ni-Fe-Co alloy coatings is increased linearly with increasing the cobalt ion content. The coatings have simple face-centered cubic solid solution structure. With increasing the cobalt content in the coating, the corrosion resistance and microhardness of coatings are increased firstly and then decreased. The Ni-Fe-13.51Co (wt%) coating exhibits the remarkable corrosion resistance: the charge transfer resistance is 3031 Ω·cm2, and the corrosion current density is 5.754×10-6 A/cm2.

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彭昭瑋,李偉洲,彭成章.電沉積Ni-Fe-Co合金鍍層的微觀結構及耐腐蝕性能[J].稀有金屬材料與工程,2023,52(5):1593~1602.[Peng Zhaowei, Li Weizhou, Peng Chengzhang. Microstructure and Corrosion Resistance of Electrodepos-ited Ni-Fe-Co Alloy Coatings[J]. Rare Metal Materials and Engineering,2023,52(5):1593~1602.]
DOI：10.12442/j. issn.1002-185X.20220624

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  • 收稿日期:2022-07-31
  • 最后修改日期:2022-09-13
  • 錄用日期:2022-09-19
  • 在線發(fā)布日期: 2023-05-31
  • 出版日期: 2023-05-29