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Article
Publication date: 26 November 2019

Ganggang Teng, Feng Wei and Yingwu Yao

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

166

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.

Details

Anti-Corrosion Methods and Materials, vol. 67 no. 1
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 26 August 2014

Chunmei Zhao and Yingwu Yao

This paper aims to report a study of the influence of tungsten carbide (WC) nanoparticles on corrosion resistance properties of electroless nickel–phosphorus (Ni–P) coatings in…

146

Abstract

Purpose

This paper aims to report a study of the influence of tungsten carbide (WC) nanoparticles on corrosion resistance properties of electroless nickel–phosphorus (Ni–P) coatings in NaCl solution.

Design/methodology/approach

The morphology of Ni–P–WC nanocomposite coatings was observed by scanning electron microscopy (SEM). The anodic polarization curves, electrochemical impedance spectra (EIS) and weight loss measurements were used to study the corrosion resistance properties of Ni–P–WC nanocomposite coatings in NaCl solution.

Findings

The WC nanoparticles content in the coatings increased with the increase of its concentration in the bath, and the WC nanoparticles are uniformly distributed in Ni–P alloy matrix. The results showed that the incorporation of WC nanoparticles elevated the corrosion resistance properties of Ni–P alloy matrix.

Originality/value

This study shows that the corrosion resistance was improved by the addition of WC nanoparticles to the Ni–P alloy matrix.

Details

Anti-Corrosion Methods and Materials, vol. 61 no. 5
Type: Research Article
ISSN: 0003-5599

Keywords

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Article
Publication date: 4 November 2013

Yingwu Yao, You Zhou and Liang He

– This paper aims to study the corrosion behavior of molybdate conversion coatings on AZ31 magnesium alloy in NaCl solution.

277

Abstract

Purpose

This paper aims to study the corrosion behavior of molybdate conversion coatings on AZ31 magnesium alloy in NaCl solution.

Design/methodology/approach

The open circuit potential curves, anodic polarization curves, electrochemical impedance spectroscopy and immersion tests were used to study the corrosion behavior of molybdate conversion coatings on AZ31 magnesium alloy in NaCl solution.

Findings

The molybdate conversion coatings were homogeneous and uniform. The corrosion resistance of AZ31 magnesium alloy had been improved evidently through the molybdate conversion treatment.

Originality/value

The molybdate conversion coatings possess favorable feasibility in practice for the corrosion protection of AZ31 magnesium alloys in NaCl solution.

Details

Anti-Corrosion Methods and Materials, vol. 60 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

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Article
Publication date: 13 November 2007

Yingwu Yao

This paper aims to study the effect of SiO2 nano‐particulates on the corrosion behaviour of Ni‐W/SiO2 nanocomposite coatings.

611

Abstract

Purpose

This paper aims to study the effect of SiO2 nano‐particulates on the corrosion behaviour of Ni‐W/SiO2 nanocomposite coatings.

Design/methodology/approach

Weight loss measurements, electrochemical measurements and scanning electron microscope were used to study the corrosion behaviour of Ni‐W/SiO2 nanocomposite coatings in NaCl solution.

Findings

The incorporation of SiO2 nano‐particulates into the Ni‐W alloy matrix significantly increased the corrosion resistance. The improvement in corrosion resistance was due to the SiO2 nano‐particulates acting as physical barriers to the corrosion process by filling in crevices, gaps and microscopic holes on the surface of the Ni‐W alloy.

Originality/value

This study highlights the use of nano‐particulates for the control of Ni‐W alloy coating corrosion and opens a new route for industry in the anti‐corrosion field.

Details

Anti-Corrosion Methods and Materials, vol. 54 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

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