Corrosion Inhibition of Mild Steel in Acidic Media by N-[(3,4-Dimethoxyphenyl)Methyleneamino]-4-Hydroxy-Benzamide

Abstract

Mild steel (a low carbon steel) is an affordable engineering material used for many purposes in various environments including mild acidic environment with some precautions. The corrosion behaviour of mild steel (MS) in 0.5 M H2SO4 and 0.5 M HCl, in the temperature range (303–323 K) without and with the inhibitor N-[(3,4-dimethoxyphenyl) methyleneamino]-4-hydroxy-benzamide (DMHB), was investigated using Potentiodynamic polarization and Electrochemical impedance spectroscopy (EIS) techniques supplementing with surface characterization study using scanning electron microscope (SEM) and atomic force spectroscopy (AFM). Experimental observations were found to be in agreement with Density functional theory (DFT) calculations. The inhibition efficiency increases with increase in DMHB concentration and showed maximum inhibition efficiency of 86% in 0.5 M H2SO4 and 81% in 0.5 M HCl, respectively, at concentration of 3 × 10─3 M at 303 K. The inhibition efficiency of DMHB obtained relatively at its lower concentration (3 × 10─3 M) compared to other reported related compounds confirms its potential towards corrosion inhibition. The variation in the kinetic and thermodynamic parameters indicated physisorption of DMHB on MS and its mixed type inhibitive action followed Langmuir’s isotherm model. DFT calculations go along with the experimental results, signifying the potential corrosion inhibition behaviour of DMHB for MS in both the acid media.

On Steel Surface Modification via Embedment of ZnNPs@polystyrene Composite as Anti-corrosive Template

“…These differences in weight losses can be referred to the quite aggressive attacks, toward the steel surfaces, by the latter two media than in case of water and formation water. These stronger attacks can be explained by the increased number of corrosive sites in diesel fuel and sulfuric acid compared to those of aqueous media (Muthamma et al 2021). In an agreement with illustrated data in Table 3, the maximum CIE could be noticed, after 10 days, in case of using pure water.…”

Review on the Recent Development of Fatty Hydrazide as Corrosion Inhibitor in Acidic Medium: Experimental and Theoretical Approaches

“…Recently, many researchers have reported that nitrogen-containing compounds such as fatty hydrazide and its derivatives demonstrated to be effective inhibitors for metal corrosion in acidic mediums. Their versatile molecular structure containing electron-donating groups, heteroatoms, π-electrons, and lone pair increases their ability to mitigate corrosion in an acidic medium [27]. Besides, the presence of heteroatoms acts as the active adsorption site to form a protection layer on the metal surface and facilitates more donor-acceptor interaction with the inhibitor's molecules [28].…”

“…Furthermore, many studies on corrosion inhibitors have found that hydrazides of fatty acids are more efficient inhibitors than cyclic amines, hydrazides, and aromatic amines [29]. Moreover, hydrazide derivatives are well known for their effectiveness as anticancer, antibacterial, anti-inflammatory, analgesic, and antioxidant properties [27,30]. Numerous studies have been conducted using fatty hydrazides as corrosion inhibitors in the past years.…”

“…On the other hand, Muthamma et al [27] studied the corrosion behavior of new hydrazide derivative corrosion inhibitor N-[(3,4-dimethoxyphenyl)methyleneamino]-4hydroxy-benzamide (DMHB) for mild steel in 0.5 M H 2 SO 4 and 0.5 M HCl medium, respectively. This investigation was performed using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques supplementing with surface characterization using scanning electron microscope (SEM) and atomic force spectroscopy (AFM).…”

Synthesis and Assessment of Two Malonyl Dihydrazide Derivatives as Corrosion Inhibitors for Carbon Steel in Acidic Media: Experimental and Theoretical Studies

“…The adsorption of the organic compound on metals or alloys is controlled by many factors, such as the surface nature, type of the metal charge, and the inhibitor structure. Among organic compounds, hydrazine compounds showed high corrosion inhibition effectiveness [ 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Experimental methods are appropriate for clarifying the inhibition mechanisms and the corrosion behaviour of metals and alloys, but they are time-consuming and expensive.…”