|
Abstract
|
This study aimed at studying the effect of an
inorganic anticorrosive magnetic material on the corrosion
protection properties of mild steel in 1 N HCl using electrochemical
and weight loss method. Cobalt ferrite nanoparticles
dispersed in silica matrix (
CoFe2O4–SiO2) were developed
in order to overcome the disadvantages of widely
organic corrosion inhibitors. Magnetic nanocomposite
powders that could be easily recovered by applying an
external magnetic field has been prepared using a sol–gel
auto-combustion route in the presence of novel precursors
without adding any surfactant. Magnetic CoFe2O4/
SiO2
samples that was synthesized in the presence of trimesic
acid, indicated no impurity, ferromagnetic behavior, spherical
shape with an average diameter of 30 nm and homogeneous
scattered in the matrix. Nanocomposite samples
characterized by FTIR, SEM, XRD, TGA and VSM techniques.
Thermodynamic parameters calculated, temperature
effect and adsorption mechanism was investigated as
well. The results obtained from the polarization technique
are in a good agreement with the values from the gravimetric
measurements, this agreement among two independent
techniques proves the validity of the results. Theoretical
corrosion inhibition of optimized final structure was investigated
and corroborated experimental results
|