Use of Experimental Designs to Evaluate the Influence of 2-Mercaptobenzimidazole on the Corrosion of Mild Steel in HCl (1 M) Environment in the Presence of Alcohol Ethoxylate

Abstract

The present study attempted to investigate the best conditions for the use of a mixture of 2-mercaptobenzimidazole and alcohol ethoxylate (C13) as corrosion inhibitor of mild steel in 1 M HCl through the use of the surface response methodology. A matrix of Doelhert to 4 factors was used as the experimental design in this research as it permits the use of the response surface methodology in a spherical field. The response used in the exploitation of the design was the determination of the inhibitor efficiency. It was assessed through gravimetric measurements on samples in the absence and presence of the inhibitor. The results were confirmed using electrochemical impedance spectroscopy (EIS).

Inhibition of Mild Steel Corrosion by some Phenyltetrazole Substituted Compounds in Hydrochloric Acid

“…Most of the well known inhibitors are organic compounds containing nitrogen [7][8][9][10][11][12][13], oxygen [9,[11][12][13] or nitrogen and sulfur [14,16] in their functional groups. Some studies have shown that the inhibition of the corrosion process is mainly decided by the formation of donor-acceptor surface complexes between free or π electrons of an inhibitor and vacant d orbital of a metal [17][18][19]. The aim of this work is to evaluate and to compare the corrosion inhibition efficiency of some phenyltetrazole substituted compounds for mild steel in 1 M HCl at 25 °C using weight loss measurement, potentiodynamic polarization and electrochemical impedance spectroscopy.…”

Modeling electrochemical surface responses for PANI bronze corrosion protection

“…The best pretreatment conditions were determined which caused a protective Cu‐AMT film on the bronze surface. Experimental designs were also used for optimizing coatings deposition at various substrates . The Plackett–Burman experimental design was used by Khanmohammadi et al .…”

“…Experimental designs were also used for optimizing coatings deposition at various substrates. [17][18][19][20][21][22][23][24][25][26][27] The Plackett-Burman experimental design was used by Khanmohammadi et al [28] to optimize the synthesis of polyaniline TiO (PANI-TiO) composite for carbon steel preservation. The authors applied a screening factorial design to identify the most significant variable on the PANI-TiO composite preparation.…”

Electro-Chemical Impedance Spectral (EIS) Study of Patinated Bronze Corrosion in Sulfate Media: Experimental Design Approach

“…The Gerischer impedance was introduced to describe a diffusion type impedance in which the species also participates in a chemical reaction along the diffusion path [18]. This impedance was generally observed in a mixed conducting solid electrolyte systems [2].…”

“…Nowadays, the chemometric approach is considered as powerful tool for studying the corrosion and protection process. Many works introduced the use of experimental designs for understand metals corrosion and inhibition [12]- [18]. Among them, only de Lago et al [19] used the experimental design to study the effect of 2-amino-5-mercapto-1,3,4-thiadiazole (AMT) as inhibitor for bronze protection in artificial rainwater.…”