CORROSION STUDY OF ZINC-RICH EPOXY ESTER PAINTS FOR COLD GALVANIZING OF MILD STEEL

Muhammad Faheem Maqsood, Mohsin Ali Raza (), Zaeem Ur Rehman, Muhammad Abid, Aqil Inam and Shahid Iqbal
Additional contact information
Muhammad Faheem Maqsood: Institute of Metallurgy & Materials Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore-54590, Pakistan
Mohsin Ali Raza: Institute of Metallurgy & Materials Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore-54590, Pakistan
Zaeem Ur Rehman: Institute of Metallurgy & Materials Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore-54590, Pakistan
Muhammad Abid: #x2020;Institute of Polymer & Textile Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore-54590, Pakistan
Aqil Inam: Institute of Metallurgy & Materials Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore-54590, Pakistan
Shahid Iqbal: #x2021;National University of Technology, Islamabad, Pakistan

Surface Review and Letters (SRL), 2021, vol. 28, issue 07, 1-11

Abstract: This study aims at producing zinc (Zn)-rich epoxy ester (EE) paints for cold galvanizing of mild steel. Zn particles with a narrow particle size distribution of 1μm to 5μm were dispersed in EE resin by vacuum centrifuge mixer. The effect of Zn concentration in EE resin on cathodic protection ability of resulting paints was studied. Galvanic corrosion protection ability of the paints was studied in 3.5% (mass ratio) NaCl solution using electrochemical characterization techniques such as open circuit potential (OCP), Tafel analysis and electrochemical impedance spectroscopy (EIS). The results showed that cathodic protection ability depends on the loading of Zn particles in the EE and it is effective when the mass fraction of Zn was equal to or exceeded 90%. At this concentration, Zn particles developed interconnecting conducting networks as determined by scanning electron microscopy (SEM) which were responsible for the galvanic effect of the coating. The EE paints developed at mass ratio below 90% behaved as a conventional organic barrier coating and did not show any cathodic protection effect due to the lack of contact between Zn particles. The EE paint showed good resistance to abrasion and wear. The electrochemical behavior of Zn-rich EE paint (with cathodic protection ability) developed in this study was compared with commercial acrylic-based “cold galvanized paint” (Roval). EE-based “cold galvanized paints” were found to be more protective and long lasting compared to commercial “cold galvanized paints”.

Keywords: Cold galvanizing; epoxy ester; steel; electrochemical testing (search for similar items in EconPapers)
Date: 2021
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X21500645
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:28:y:2021:i:07:n:s0218625x21500645

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X21500645

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().