Influence of an emulsion coating on the corrosion resistance of hull plates made of mild steel in natural sea water

Thangaiyan Santhi; Arjunan Krishnaveni; David Selvaraj Gnanasangeetha; Sarmina Duraisamy; Thanappan Sasilatha; Susai Rajendran

doi:10.5937/zasmat2303340S

Authors

Thangaiyan Santhi Arasu College of Arts and Science for Women, PG Department of Chemistry, Karur, India Author
Arjunan Krishnaveni Yadava College, PG Department of Chemistry, Thiruppalai, Madurai, India Author
David Selvaraj Gnanasangeetha PSNA College of Engineering and Technology, Department of Chemistry, Dindigul (Autonomous), India Author
Sarmina Duraisamy Namakkal Kavignar Ramaligam Government Arts College for Women, PG Department of Chemistry, Namakkal, Tamil Nadu, India Author
Thanappan Sasilatha AMET University, Department of EEE, Chennai, India Author
Susai Rajendran St. Antony's College of Arts and Sciences for Women Thamaraipady, Corrosion Research Centre, Department of Chemistry, Dindigul, Tamil Nadu, India + Pondicherry University, Puducherry, India Author

DOI:

https://doi.org/10.5937/zasmat2303340S

Keywords:

emulsion coating, corrosion resistance, hull plates, mild steel, natural sea water, electrochemical studies

Abstract

The corrosion resistance of mild steel, used to make hull plates in ship technology, in sea water before paint coating [Nippon paint SUMO XTRA durable exterior emulsion coating (emulsion coating)] 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 decrease. 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. The corrosion inhibition efficiency was greater than 99%. The hull plates made of mild steel may be coated with durable exterior emulsion coating (emulsion coating). This will control the corrosion of the hull plates in the sea water. There will be increase in the life time of the hull plates.

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