Synergistic effect of potassium iodide and sodium dodecyl sulfonate on the corrosion inhibition of carbon steel in HCl medium: a combined experimental and theoretical investigation

Abstract

Carbon steel is an important industrial material, but it usually suffers from serious corrosion in the service environment.

Experimental and theoretical investigations of benzoic acid derivatives as corrosion inhibitors for AISI 316 stainless steel in hydrochloric acid medium: DFT and Monte Carlo simulations on the Fe (110) surface

“…Because of heterogeneity of the electrode surface, the modelization of the double layer was approached using a constant phase element (CPE) instead of the double-layer capacitance (C dl ). 58,59 In this case, CPE matched precisely the impedance of the interface electrode/solution instead of the capacitor. The experimental results were tted, and the simulated parameters according to the electrical equivalent circuit were gathered in Table 3.…”

New Amine/Phenylglycedyl Ether Adducts for Mild Steel Protection in 1 M HCl: Experimental and Computational Study

“…Electronegativity is a key parameter used extensively to make predictions about chemical behaviour. In the reaction of two systems with different electronegativities (as a metallic surface and an inhibitor molecule) the electron flow will be from the molecule with the low electronegativity towards that of a higher value, until the chemical potentials are the same [46]. In other words, large electronegativity values characterize the acceptor and small electronegativity values are found for the donors [47][48][49][50][51].…”

Corrosion study of copper in aqueous sulfuric acid solution in the presence of (2E,5E)-2,5-dibenzylidenecyclopentanone and (2E,5E)-bis[(4-dimethylamino)benzylidene]cyclopentanone: Experimental and theoretical study

“…The corrosion protection performance exhibited by these organic compounds depends on the heteroatom present and usually decreases in the following order: O > N > S > P [11,12], but one has to be careful with such generalizations and take into consideration the functional group and steric factors. A vast number of molecules such as plant extracts, drugs, and synthetic organic molecules have been demonstrated to have good copper corrosion inhibition properties [13][14][15][16][17][18].…”

“…Moreover, these kinds of derivatives are expected to be more eco-friendly than the benzotriazoles and related derivatives, because they are susceptible to retro-Claisen-Schmidt reaction and can revert back to the starting aldehyde and cyclopentanone, which are biodegradable. An additional useful feature is that M2 is fluorescent [14][15][16] as a free amine and the fluorescence is quenched under acidic conditions (i.e., upon protonation of the dimethylamino group). These 2,5-diarylidenecyclopentanones are known compounds and their structure and properties have been thoroughly investigated (Scheme 1) [22][23][24][25][26].…”

“…This is also applicable to corrosion studies, where DFT allows accurate prediction of the inhibition efficiency (IE) of organic corrosion inhibitors on the basis of electronic and molecular properties as well as reactivity indexes [29]. Cost effectiveness is an important parameter when synthetic inhibitors are used [16]. The studied inhibitors suggested here offer the advantage of being synthesized in a single step using relatively inexpensive industrially available chemicals (cyclopentanone, benzaldehyde, and 4-(dimethylamino)benzaldehyde).…”