Optimization of the Preparation Parameters of High-Strength Nickel Layers by Electrodeposition on Mild Steel Substrates

Materials

Yan Shi¹  Qing Chang¹  Dongai Wang¹  Bin Liu¹  Meihua Liu¹  Feihui Li² 

[1] Department of Mechanics, Tianjin University of Commerce, Tianjin 300134, China;School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300072, China;

关键词: electroplated nickel;    orthogonal test;    mechanical properties;    residual stress;    watts plating solution;   

DOI  :  10.3390/ma14185461

来源: DOAJ

【 摘 要 】

The electrodeposition process parameters were optimized for the acquisition of high-strength monolithic nickel layers on Q235A substrates based on the Watts nickel plating solution using the DC electrodeposition method. Based on the study of the electrochemical polarization behavior of nickel ions in Watts’ plating solution, 16 experimental protocols were selected according to the orthogonal test method. The residual stress, microhardness, modulus of elasticity, and surface roughness of the nickel plating were tested by X-ray diffractometer, nano-mechanical test system, and surface profilometer, respectively, to investigate the influence of current density, temperature, and PH on the mechanical properties of nickel plating, so as to determine the best process solution for the preparation of high-strength nickel plating. The results of the study show that the mechanical properties of the nickel deposits electrodeposited onto Q235A are optimized when plating at a current density of 3 A/dm², a bath temperature of 45 °C, and a pH of 3.5. The nickel-plated layer has a minimum grain size of 34.8 nm, a microhardness of 3.86 GPa, a modulus of elasticity of 238 GPa, and a surface roughness Ra of 0.182 μm.

【 授权许可】

Unknown