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Coatings 2019, 9(3), 174;

Physical and Electrochemical Performances of Cold Sprayed Pb Electrodes

Science and Technology on Marine Corrosion and Protection Laboratory, Luoyang Ship Material Research Institute, Qingdao 266237, China
Qingdao No. 9 High School (Qingdao Foreign Language School), Qingdao 266000, China
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
Author to whom correspondence should be addressed.
Received: 16 February 2019 / Revised: 1 March 2019 / Accepted: 4 March 2019 / Published: 6 March 2019
(This article belongs to the Special Issue Cold Spraying: Recent Trends and Future Views)
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Titanium-based PbO2 electrodes are widely used for chemical industries, such as electrodialysis, electrolysis, and electrodepositing, to improve the mechanical and life cycle properties of Pb metal electrodes. However, PbO2 electrodes are usually electrodeposited onto rigid metals due to its soft characteristic, which results in severe passivation problems requiring thin thickness and high porosity. It is of great importance to develop a rigid Pb metal electrode system since thermal spraying and welding methods fail to manufacture such a promising electrode. In the present work, the cold spraying method was used to deposit a pure Pb metal coating with thickness of above 500 μm on Q235 steel substrate. The coating has good physical performances, the porosity is less than 1%, and the bonding strength ranges from 6.25 to 7.75 MPa. The cross-sectional morphology suggests that no through-thickness pores exist in the coating. The oxygen evolution potential is larger than 1.5 V vs. SCE, which is similar to the potential of the titanium-based PbO2 electrode. Dynamic polarization curves and cyclic voltammetry curves of coated sample in sodium sulfate solution indicate that cold sprayed Pb coating is a good electrode for electrochemical reduction reactions. All our results mean that cold spraying is capable of manufacturing electrode materials for electrochemical industries. View Full-Text
Keywords: Pb; cold spray; electrode; roughness; bonding strength; deformation Pb; cold spray; electrode; roughness; bonding strength; deformation

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Huang, G.; Zhuang, Y.; Fu, W. Physical and Electrochemical Performances of Cold Sprayed Pb Electrodes. Coatings 2019, 9, 174.

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