Abstract
This work presents a new method to prepare poly(sodium acrylate) magnetite composite nanoparticles. Core/shell type magnetite nanocomposites were synthesized using sodium acrylate as monomer and N,N-methylenebisacrylamide (MBA) as crosslinker. Microemulsion polymerization was used for constructing core/shell structures with magnetite nanoparticles as core and poly(sodium acrylate) as shell. Fourier transform infrared spectroscopy (FTIR) was employed to characterize the nanocomposite chemical structure. Transmittance electron microscopy (TEM) was used to examine the morphology of the modified poly(sodium acrylate) magnetite composite nanoparticles. These particle will be evaluated for effective anticorrosion behavior as a hydrophobic surface on stainless steel. The composite nanoparticles has been designed by dispersing nanocomposites which act as a corrosion inhibitor. The inhibition effect of AA-Na/magnetite composites on steel corrosion in 1 M HCl solution was investigated using potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). Polarization measurements indicated that the studied inhibitor acts as mixed type corrosion inhibitor. EIS spectra exhibit one capacitive loop. The different techniques confirmed that the inhibition efficiency reaches 99% at 50 ppm concentration. This study has led to a better understanding of active anticorrosive magnetite nanoparticles with embedded nanocomposites and the factors influencing their anticorrosion performance.
Highlights
Corrosion is one of the most common causes of damaged metal components failure
All coatings based on macromolecules are permeable to oxygen and water during their service life and in some cases the diffusion of water and oxygen through the polymeric film is several times greater than the minimum amount required to initiate the corrosion of metallic substrate [2]
The AA-Na/coated magnetite nanogels are synthesized through two steps
Summary
Corrosion is one of the most common causes of damaged metal components failure. It cannot be totally eliminated, but its intensity can be reduced by using new alloys, corrosion inhibitors or protective films, the selection of appropriate materials for particular applications, and coatings deposited onto the metal surface, especially in aggressive environments. Nanoparticle-containing coatings possess outstanding physical, mechanical and thermal properties [4]. Various available nanoparticles such as silica, titanium oxide, zirconia, silver, magnetitite, nanoclay and their derivatives are widely used [5,6,7,8,9,10]. These unique properties, together with relatively low material cost, add a great deal of interest toward the commercialization of inorganic-based nanocomposites [11]. It is well known that the properties of these materials; greatly depend on the quality of the nanoparticle dispersion in the polymer composites and on the nanoparticle content [12]
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