Theoretical and electrochemical evaluation of 2-thioureidobenzheteroazoles as potent corrosion inhibitors for mild steel in 2 M HCl solution

Novel biphenylidene-thiopyrimidine derivatives as corrosion inhibitors for carbon-steel in oilfield produced water

“…The inhibition efficency (ƞ%) and surface coaverge ( ) of the inhibitors were calculated by the following expression 50 : where R ct and R ct(inh) are the values of the charge transfer resistance in the absence and presence of these inhibitors, respectively. It is evident from Table 4 that the inhibitor dose values increase the inhibition efficency and the R ct value, and decrease C dl value, indicating that the thickness of the ptoective layer developed at the metal/solution interface increases.…”

Insight on Corrosion Prevention of C1018 in 1.0 M Hydrochloric Acid Using Liquid Smoke of Rice Husk Ash: Electrochemical, Surface Analysis, and Deep Learning Studies

“…Commonly, the pipelines are composed of mild steel and ferrous metal with superior mechanical properties. Moreover, the materials are bendable and quickly form a specific shape without losing their structural integrity [2]. Nonetheless, the material remains susceptible to corrosion, leading to critical issues such as a dramatic physical appearance, mechanical properties, and material resistance.…”

Development of a Novel Thermally Stable Inhibitor Based on Furfuryl Alcohol for Mild Steel Corrosion in a 15% HCl Medium for Acidizing Application

“…They can be used in transportation, construction, energy, and industries owing to their economic efficiency and strong versatility. 2,18 Heteroatoms (such as N, O, P, and S), heterocycles, multiple bonds, and aromatic rings are the most important electron-rich groups in the structure of organic CIs that cause the adsorption of their molecules on the surface of metal and protect it against corrosive species in the medium. 3,21−23 In other words, the replacement of CIs with water molecules on the metal surface leads to the blocking of active sites for redox reactions and thus inhibits the transfer of water and corrosive ions on the metal surface.…”

“…Low-cost mild steel (MS) is considered as an important structural component in many industrial applications because of its outstanding properties such as good ductility, high tensile, and impact strength. − However, MS is prone inherently to be corroded in corrosive environments, especially acidic solutions . Corrosion is a major problem for the oil and gas industry as it represents a significant portion of the total costs of oil and gas companies every year worldwide.…”

“…Although complete prevention of corrosion is impossible, it can be controlled using effective corrosion inhibitors (CIs). − CIs are chemical compounds that reduce the corrosion rate of metals at low concentrations when they are added to corrosive environments. They can be used in transportation, construction, energy, and industries owing to their economic efficiency and strong versatility. , Heteroatoms (such as N, O, P, and S), heterocycles, multiple bonds, and aromatic rings are the most important electron-rich groups in the structure of organic CIs that cause the adsorption of their molecules on the surface of metal and protect it against corrosive species in the medium. ,− In other words, the replacement of CIs with water molecules on the metal surface leads to the blocking of active sites for redox reactions and thus inhibits the transfer of water and corrosive ions on the metal surface. , The molecular properties of CI molecules, such as steric factors, aromaticity, chain length, functional groups, electronic structures, cross-linking ability, and solubility have a significant impact on their adsorption behavior . Due to the low biodegradability of traditional CIs such as mercury salts, chromate, phosphorus-containing compounds, and the majority of organic molecules, it is critical to develop new eco-friendly inhibitors. − In recent years, CIs based on bio-sources such as carbohydrates, vegetable oils, amino acids, and plant extracts have been studied to address this issue. ,− Furfuryl alcohol as another renewable substance derived from furfural has also been investigated as a CI in acidic solutions. − Although the inhibition performance of bio-based CIs has been evaluated for corrosion inhibition of various metals, their main challenge is poor inhibition efficiency at high temperatures. , It should be noted that the temperature is over 353 K during some acid stimulation operations, which considerably increases the corrosive potential of the environment toward technological structures based on steel.…”