Effect of Titanium Ions on the Corrosion Resistance of Non - Cyanide Electroplated Cadmium

LUO Mingsheng, CHEN Wei, PAN Zixin, ZHAI Ruisen, WANG Chunxia

doi:10.16577/j.issn.1001-1560.2022.0311

Materials Protection >

2022 , Vol. 55 >Issue 11: 78 - 82

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0311

Effect of Titanium Ions on the Corrosion Resistance of Non - Cyanide Electroplated Cadmium

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(School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China)

Received date: 2022-05-24

Revised date: 2022-06-28

Accepted date: 2022-07-13

Online published: 2023-12-25

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Abstract

For improving the comprehensive performance of the cadmium coating, titanium ions were added into the pure cadmium plating solution, and the electrodeposition method was adopted to prepare the coating to improve the compactness and corrosion resistance of the non - cyanide electroplated cadmium coating. Field emission electron scanning microscope (FESEM) was utilized to observe the surface and cross - sectional microstructure of the coating and analyze the internal stress of the coating. X - ray diffractometer (XRD) was employed to investigate the phase composition and grain size of the coating. Moreover, an electrochemical workstation was used to study the corrosion resistance of the coating. Results showed that after adding titanium ions into the non - cyanide cadmium plating solution, the grain size of the coating decreased from 44.6 nm to 16.5 nm; the self - corrosion potential increased from -0.232 V to 0.089 V; the self - corrosion current density decreased from 3.56 mA/dm2 to 2.58 mA/dm2; within 5 000 s, the hydrogen permeation current density decreased to 8.6 μA/cm2 in case of a pure cadmium coating, while such value was only 3.2 μA/cm2 in case of a cadmium coating containing titanium ions, which indicated a much larger reduction rate. In general, the addition of titanium ions made the crystallization of the coating more detailed, enhanced the corrosion resistance of the coating, and improved the hydrogen - blocking ability of the coating.

Key words： non - cyanide electroplated cadmium; titanium ion; microstructure; grain size; corrosion resistance

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LUO Mingsheng, CHEN Wei, PAN Zixin, ZHAI Ruisen, WANG Chunxia . Effect of Titanium Ions on the Corrosion Resistance of Non - Cyanide Electroplated Cadmium[J]. Materials Protection, 2022 , 55(11) : 78 -82 . DOI: 10.16577/j.issn.1001-1560.2022.0311

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