Interfacial Adsorption and Corrosion Inhibition Behavior of Environmentally Friendly Imidazole Derivatives for Copper in the Marine Environment

Abstract

Copper and copper alloys are commonly used in industry due to their excellent mechanical properties, making research on the corrosion resistance of copper of great significance. The corrosion inhibition properties of 2-imidazolidinone and allantoin for copper in 3.5 wt % NaCl were studied by weight loss and electrochemical tests. Changes in the density of the copper corrosion current and the impedance module indicated that 2-imidazolidinone and allantoin exhibited cathodic corrosion inhibitors and a valid protective effect. Meanwhile, the weight loss tests showed that the inhibition efficiency of 2-imidazolidinone and allantoin at 3 mM reached 98.94% and 97.82%, respectively. The surface physiochemical properties were qualitatively and quantitatively studied by using SEM-EDS, XPS, white light interferometry, and contact angle analysis. The interfacial adsorption behavior revealed by QCM, synchrotron radiation micro-infrared, and adsorption isotherm analysis indicated that both imidazole derivatives formed an effective and rigid physical adsorption film and obeyed the Langmuir adsorption model on copper, while both the mass and thickness of the adsorption film formed by 2-imidazolidinone were higher than those of allantoin. This study contributed to an in-depth understanding of the interfacial adsorption behavior and corrosion inhibition ability of 2-imidazolidinone and allantoin and provided guidelines for the design and development of novel heterocycles as potential corrosion inhibitors for copper in marine environments. In particular, copper was used as a corrosion inhibitor in seawater storage and transport equipment.

Insight into the Corrosion Inhibition Mechanism of Sodium Silicate on the Magnesium Alloy Surface: Experimental and Theoretical Calculations

“…VersaStudio software was used to extract the fitting data from the given curves. Likewise, the corrosion inhibition efficiency (η p ) was calculated by the corrosion current density ( i corr ) using the following equation η p = i corr 0 − i corr normali corr 0 × 100 % where i corr and i corr 0 are the corrosion current densities with and without the SS inhibitor, respectively.…”

“…VersaStudio software was used to extract the fitting data from the given curves. Likewise, the corrosion inhibition efficiency (η p ) was calculated by the corrosion current density ( i corr ) using the following equation where i corr and i corr 0 are the corrosion current densities with and without the SS inhibitor, respectively.…”

Imidazolium-Based Polymeric Ionic Liquids with Short Alkyl Chains as Green Corrosion Inhibitors for Mild Steel in 1 M HCl: Experimental and Theoretical Investigations

“…9,10 In particular, imidazole, with a 6π-electron system and high solubility, can intensively interact with metal surfaces, which is used as an effective corrosion inhibitor in pickling, well acidizing, and other operations. 11,12 Zhang et al proposed that the long alkyl chains in imidazoliumbased inhibitors facilitated the formation of dense adsorption films that effectively blocked the contact between metals and corrosive media via hydrophobic shielding. 13 However, many studies have reported the obvious foaming ability of ILs with alkyl chains longer than C 8 , which may adversely affect their practical applications.…”

Unusual Increasing Viscoelasticity of Wormlike Micelles Composed of Imidazolium Gemini Surfactants with Temperature

“…Gemini surfactants have two hydrophilic hydrophobic tails and two headgroups connected by rigid or flexible spacers on the head group. , Compared to the conventional gemini surfactants, the imidazolium gemini surfactants have special properties and bigger rigid imidazolium headgroups, which have potential applications in many fields. , For example, they show a stronger self-aggregation performance, better solubility, and thermal stability. − They are used to regulate different types of chemical reactions . Therefore, it is of practical interest to study the surface activity of imidazolium gemini surfactants.…”

“…17,18 Compared to the conventional gemini surfactants, the imidazolium gemini surfactants have special properties and bigger rigid imidazolium headgroups, which have potential applications in many fields. 19,20 For example, they show a stronger self-aggregation performance, better solubility, and thermal stability. 21−23 They are used to regulate different types of chemical reactions.…”