Paint & Coatings Industry >

2025 , Vol. 55 >Issue 5: 16 - 20

DOI: https://doi.org/10.12020/j.issn.0253-4312.2024-391

Research & Development

Influence of Cotton-like Nano Co3O4 on Corrosion Resistance of Alkyd Varnish

  • LIU L Y ,
  • SHI Z W ,
  • YU H C ,
  • et al
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  • Guangxi Key Laboratory of Chemistry and Engineering of Forest Products，School of Chemistry and Chemical Engineering，Guangxi University for Nationalities，Nanning 530006，China

Online published: 2025-03-17

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Abstract

［Objective］In order to improve the anticorrosive property of alkyd varnish，a cotton-like nano  Co3O4 corrosion inhibitor was prepared.［Methods］The cotton-like nano- Co3O4 was characterized by scanning electron microscopy（SEM）， X-ray powder diffractometer（XRD） and infrared spectrometer（FT-IR），respectively. The performance of the alkyd coating with the addition of cotton-like nano-Co3O4 was tested by polarization curve，electrochemical impedance spectroscopy，salt water immersion corrosion test and water absorption rate test.［Results］The corrosion current density of pure alkyd coating was 42. 24 μA/cm2，and the corrosion current density was 1. 02-1. 56 μA/cm2 when the mass fraction of cotton-like nano- Co3O4 in the varnish was 0. 12%-0. 25%；the composite coating was only slightly corroded，while the pure alkyd coating was very seriously corroded after 20 d salt water immersion corrosion test；the water absorption rate of the composite coating was reduced to about 4%， while the absorption rate of the pure alkyd coating was more than 12%.［Conclusion］The cotton-like  Co3O4 nanomaterial could significantly improve the anticorrosion performance of alkyd varnish.

Key words： varnish; alkyd resin; cotton-like nano Co3O4; coating; corrosion

Cite this article

LIU L Y , SHI Z W , YU H C , et al . Influence of Cotton-like Nano Co3O4 on Corrosion Resistance of Alkyd Varnish[J]. Paint & Coatings Industry, 2025 , 55(5) : 16 -20 . DOI: 10.12020/j.issn.0253-4312.2024-391

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