Investigation of date seed powder as green corrosion inhibitor for mild steel: A study of solution and coating phases

Abstract

Herein, firstly, sodium montmorillonite (Na+-MMT) was modified with date seed (DS) powder, and then the anti-corrosion properties of new nanoparticles (DS-MMT) were evaluated on mild steel (MS) in the saline solution phase. Next, DS-MMT was added to epoxy (EP), and their nanocomposite was prepared. Electrochemical impedance spectroscopy (EIS), polarization, and salt spray tests showed that DS-MMT improved corrosion resistance. According to the results of EIS, the coating resistance (Rc) of EP/3 % DS-MMT after 24 days of immersion was 2473 MΩ cm2, while this value was 7.9 MΩ cm2 for EP. Also, the visual observation test showed that after 24 h, the entire surface of the blank sample was filled with rust and corrosion products, but no evidence of corrosion products was observed in the DS-MMT sample. Moreover, the antimicrobial results showed that EP/3 % DS-MMT is inhibitory and killing against Bacillus subtilis and Staphylococcus aureus.

Keywords

• Anticorrosion
• Antimicrobial
• Epoxy
• Sodium montmorillonite
• Green chemistry