Synthesis and Evaluation of Poly(Sodium 2-Acrylamido-2-Methylpropane Sulfonate-co-Styrene)/Magnetite Nanoparticle Composites as Corrosion Inhibitors for Steel

Molecules

Gamal A. El-Mahdy¹  Ayman M. Atta¹ 

[1] Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia

关键词: magnetite;    nanoparticle;    nanocomposite;    sodium 2-acrylamido-2-methylpropane sulfonate-co-styrene;    corrosion inhibitor;   

DOI  :  10.3390/molecules19021713

来源: mdpi

【 摘 要 】

Self-stabilized magnetic polymeric composite nanoparticles of coated poly-(sodium 2-acrylamido-2-methylpropane sulfonate-co-styrene)/magnetite (PAMPS-Na-co-St/Fe₃O₄) were prepared by emulsifier-free miniemulsion polymerization using styrene (St) as a monomer, 2-acrylamido-2-methylpropane sulfonic acid sodium salt (AMPS-Na) as an ionic comonomer, N,N-methylenebisacrylamide (MBA) as crosslinker, hexadecane (HD) as a hydrophobic solvent, and 2,2-azodiisobutyronitrile (AIBN) as an initiator in the presence of hydrophobic oleic acid coated magnetite particles. Hydrophobic oleic acid coated magnetite particles with an average size of about 7-10 nm were prepared with the new modified water-based magnetite ferrofluid, synthesized by a chemical modified coprecipitation method. The morphology and the particle size distributions of the crosslinked PAMPS-Na-co-St/Fe₃O₄ composite were observed and analyzed by transmission electron microscopy (TEM). The average Fe₃O₄ content of PAMPS-Na-co-St/Fe₃O₄ was determined by thermogravimetric analysis (TGA). The inhibitory action of PAMPS-Na-co-St/Fe₃O₄ towards steel corrosion in 1 M HCl solutions has been investigated by polarization and electrochemical impedance spectroscopy (EIS) methods. Polarization measurements indicate that PAMPS-Na-co-St/Fe₃O₄ acts as a mixed type-inhibitor and the inhibition efficiency increases with inhibitor concentration. The results of potentiodynamic polarization and EIS measurements clearly showed that the inhibition mechanism involves blocking of the steel surface by inhibitor molecules via adsorption.

【 授权许可】

CC BY   
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