The Preparation of a Novel Corrosion Inhibitor and Its Corrosion Inhibition Behavior on 2024 Al‐Cu‐Mg Alloy in Acid Solution

Abstract

A new corrosion inhibitor was synthesized from chloroacetyl chloride, 1,3‐propanediamine, and dodecyldimethyl tertiary amine. The structure of the synthesized product was characterized using Fourier transform infrared(FTIR). The critical micelle concentration (CMC) was determined from surface tension measurements. The inhibition behavior of the corrosion inhibitor for 2024 Al‐Cu‐Mg alloy was studied using the weight‐loss method and electrochemical measurements in hydrochloric acid solution. Experimental results show: The CMC is 7.767 × 10−4 mol L−1 and IE (C pro = 1 × 10−3 mol L−1) ≈ 87.9%. The adsorption free energy is calculated to be −33.12 kJ mol−1. Therefore, the adsorption mode is more inclined to physical adsorption. When the concentration of the synthesized product is lower than the CMC, it satisfies the Langmuir adsorption model; when the concentration is higher than the CMC, it no longer follows the Langmuir adsorption model.

High efficient corrosion inhibitor of water‐soluble polypyrrole–sulfonated melamine formaldehyde nanocomposites for 316 L stainless steel

“…The inset in Figure 6(a),(b) reveals that the Randles circuit is used to fit the EIS data. In the equivalent circuit, R s is the solution resistance, R ct is the charge transfer resistances, and C dl is the double‐layer capacitance is replaced with a constant phase element (CPE) to define the inhomogeneities in the system 53,54,55,22 …”

“…In the equivalent circuit, R s is the solution resistance, R ct is the charge transfer resistances, and C dl is the doublelayer capacitance is replaced with a constant phase element (CPE) to define the inhomogeneities in the system. 53,54,55,22 The inhibition efficiency of the inhibitor was calculated from the charge transfer resistance values using the following equation:…”

Research Progress of Organic Corrosion Inhibitors in Metal Corrosion Protection

“…Compared with CTAB, the toxic impact of CTA-4OHcinn and CTA-4EtOcin was reduced, which could be extended to a wider range of applications. Gemini surfactant bis [2-amido-3-(dodecyldimethylammonium) propyl]-propylamine dichloride also has a good corrosion inhibition effect (IE max = 87.943%) on 2024 Al-Cu-Mg alloy, with the concentration value of 1.0 × 10 −3 mol/L [19]. The hydrophilic quaternary ammonium cations in the Gemini surfactant were adsorbed to the alloy surface, and then the hydrophobic long alkyl chains were arranged neatly to form a protective film to inhibit the corrosion of the alloy.…”

Study on Crack Initiation and Propagation of New Corrosion Inhibitor during Stress Corrosion of Aluminum Alloy

“…After testing [16], the new corrosion inhibitor has higher corrosion resistance under acidic environment. However, its resistance to stress corrosion is not clear, so a new type of corrosion inhibitor was selected for stress corrosion test in this paper.…”

“…Figure 17 shows the schematic diagram of the corrosion inhibition mechanism of new corrosion inhibitor. e new corrosion inhibitor is a Gemini surfactant, which belongs to anodic adsorption film-type corrosion inhibitor [16].…”