Study on the corrosion resistance performance of PbO₂-ZrO₂ nanocomposite electrode in NaCl electrolyte solution

Abstract

Purpose

This paper aims to improve the corrosion resistance performance and stability of PbO₂ electrodes in chloride wastewater.

Design/methodology/approach

The morphology of PbO₂-ZrO₂ nanocomposite electrodes was observed by scanning electron microscopy (SEM). The open circuit potential (OCP) curves, anodic polarization curves, electrochemical impedance spectra, accelerated life tests, weight-loss tests and reusability tests were used to study the corrosion resistance properties and stability of PbO₂-ZrO₂ nanocomposite electrodes in NaCl solution.

Findings

SEM showed that the surface morphology of PbO₂-ZrO₂ nanocomposite electrodes became compacted and smooth. Electrochemical tests showed that ZrO₂ nanoparticles could increase the OCP, corrosion potential and charge transfer resistance, and decrease the corrosion current density in 3.5 Wt. per cent NaCl electrolyte solution. Besides, PbO₂-ZrO₂ nanocomposite electrodes showed high reusability for acetamiprid degradation, the accelerated service life could reach 146 h, which was almost 3.3 times longer than that of PbO₂ electrodes (44 h), weight-loss tests showed that the corrosion resistance for PbO₂-ZrO₂ nanocomposite electrodes was 2.3 times as compared to PbO₂ electrodes.

Originality/value

By the codeposition of ZrO₂ nanoparticles, the corrosion resistance performance and stability of PbO₂ electrodes in NaCl electrolyte were improved.

Citation

Teng, G., Wei, F. and Yao, Y. (2020), "Study on the corrosion resistance performance of PbO₂-ZrO₂ nanocomposite electrode in NaCl electrolyte solution", Anti-Corrosion Methods and Materials, Vol. 67 No. 1, pp. 24-30. https://doi.org/10.1108/ACMM-05-2019-2125