Influence of a paint coating on the corrosion of hull plates made of mild steel in natural seawater

Karunaivel Kavipriya; Nilavan Anitha; Veerapandian Velkannan; Susai Rajendran; Caslav Lacnjevac

doi:10.5937/zasmat2203353K

Authors

Karunaivel Kavipriya PSNA College of Engineering and Technology, Department of Chemistry, (Affiliated to Anna University, Chennai), Dindigul, India Author
Nilavan Anitha St. Antony's College of Arts and Sciences for Women, Department of Chemistry, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women's University, Kodaikanal, India) Author
Veerapandian Velkannan Thiagarajar College of Engineering (Affiliated to Anna University, Chennai), Department of Chemistry, Thiruparankundram, Madurai, Tamil Nadu, India Author
Susai Rajendran St. Antony's College of Arts and Sciences for Women, Department of Chemistry, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women's University, Kodaikanal, India) + Pondicherry University, Centre for Nanoscience and Technology, Puducherry, India Author
Caslav Lacnjevac University of Belgrade, Faculty of Agriculture, Serbia Author

DOI:

https://doi.org/10.5937/zasmat2203353K

Keywords:

paint coating, corrosion inhibition, hull plates, mild steel, natural seawater, electrochemical studies

Abstract

The corrosion resistance of mild steel (used to make hull plates in ship technology) in seawater before paint coating (Nippon paint, weatherbond advance) and after paint coating has been measured by electrochemical studies such as Polarisation study and AC impedance spectra. It is observed that after paint coating, the corrosion resistance of mild steel hull plates increases. Polarization study reveals that after paint coating, the linear polarization resistance increases and corrosion current decreases. AC impedance spectra reveal that in the presence of paint coating charge transfer resistance value increases, impedance value increases, phase angle increases and double layer capacitance value decreases.

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