Preparation of Carbon-Doped Titanium Nitride Corrosion-Resistant Coating on Surface of Titanium Bipolar Plates AITranslate

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Chinese Library Classification Number:TG178[金属学及工艺—金属表面处理]

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To improve the corrosion resistance and conductivity of titanium bipolar plates in proton exchange membrane(PEM) water electrolyzer, a carbon-doped titanium nitride(C-TiN) composite protective coating was prepared on the surface of the titanium substrate by electrophoretic deposition-heat treatment, and its electrochemical corrosion performance was tested in the solution containing 0.5 mol/L H₂SO₄and 5 mg/L F-,which simulates the anode environment of PEM water electrolyzer.The results show that electrophoretic deposition and heat treatment improve the connectivity of titanium nitride nano-particles, enhance the adhesion between the coating and the substrate, and realize the rapid transfer of electrons in electroactive materials.The conductivity and corrosion resistance of the carbon-doped TiN coating prepared at 400 ℃ receive great promotion.Compared with the untreated sample, the contact resistance of the sample plated with C-TiN-400 ℃ coating can reach 2.25 mΩ·cm² at the pressure of 146.3 N/cm².