Improved Corrosion Resistance of Steel in Ethanol Fuel Blend by Titania Nanoparticles and Aganonerion polymorphum Leaf Extract

Abstract

A porous and low-density protective film on a steel surface in the corrosive environment can undergo deterioration even in the presence of organic inhibitors due to infiltration of aggressive ions into the pinholes and/or pores. This phenomenon is related to the localized corrosion that takes place even in the presence of an optimal concentration of organic corrosion inhibitors in the given medium. To overcome this issue, we have designed an organic protective film on a steel surface with the help of titania nanoparticles (TNPs) combined with an organic corrosion inhibitor derived from Aganonerion polymorphum leaf extract (APLE), all to be studied in a simulated ethanol fuel blend (SEFB). The TNPs with varied diameters and concentrations have been studied for examining their effect on the inhibition capacity of 1000 ppm APLE on the steel surface in SEFB medium using electrochemical and surface analysis techniques. Enhanced corrosion inhibition of the surficial film was observed in the presence of both the APLE inhibitor and small amounts of TNPs. A direct agreement was observed between the experimental and molecular dynamics theoretical investigations showcasing high binding energy between inhibitor molecules and steel substrates, resulting in a much higher adhesion of the protective film, good thermal stability of the adsorbent film, and electron abundance for the supply of steel substrate of inhibitor species.

Role of SnO2 Nanoparticles for a Self-Forming Barrier Layer on a Mild Steel Surface in Hydrochloric Acid Medium Containing Piper betle Leaf Extract

“…On the other hand, the benefit of NP addition can be explained from the Bode plots of Figure S4 where an improvement (in both height and width) for the medium-frequency range, which corresponded to the processes within the protective organic film (and its integrity), was found. This could indicate that the porous organic film had its pores filled, similar to what Hoai Vu et al have achieved . The first observation from XPS is the consolidated single corrosion product, similar to a passivated surface.…”

“…This could indicate that the porous organic film had its pores filled, similar to what Hoai Vu et al have achieved. 27 The first observation from XPS is the consolidated single corrosion product, similar to a passivated surface. The PD results can also confirm this with its obvious anodic passive region from −500 to −400 mV Ag/AgCl .…”

Corrosion Aggressiveness of Ethanol–Gasoline and Butanol–Gasoline Blends on Steel: Application of Electrochemical Impedance Spectroscopy

“…In contrast, electrochemical methods, such as electrochemical impedance spectroscopy (EIS) and polarization characteristic measurements, have higher demands on the instrumental equipment compared with the gravimetric methods, but they provide much more corrosion information in a much shorter period . Moreover, both the gravimetric and electrochemical methods make it possible to evaluate the efficiency of green corrosion inhibitors. − …”

Efficiency of Steel Corrosion Inhibitors in an Environment of Ethanol–Gasoline Blends

“…Also, the influence of the addition of TiO 2 nanoparticles on the inhibition of the natural steel corrosion inhibitor based on the extracts , in an environment of EGBs was tested . The study demonstrated the beneficial effect of these nanoparticles on inhibition …”