SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 34 ›› Issue (6): 125-133.DOI: 10.1016/j.cjche.2020.09.051

• Chemical Engineering Thermodynamics • Previous Articles     Next Articles

Innovative surfactant of Gemini-type for dissolution mitigation of steel in pickling HCl medium

Medhat Kamel1, Mohamed Hegazy2, Salah Rashwan1, Mohamed El Kotb1   

  1. 1 Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt;
    2 Egyptian Petroleum Research Institute(EPRI), Nasr City, Cairo 11727, Egypt
  • Received:2020-07-18 Revised:2020-09-19 Online:2021-08-30 Published:2021-06-28
  • Contact: Medhat Kamel

Innovative surfactant of Gemini-type for dissolution mitigation of steel in pickling HCl medium

Medhat Kamel1, Mohamed Hegazy2, Salah Rashwan1, Mohamed El Kotb1   

  1. 1 Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt;
    2 Egyptian Petroleum Research Institute(EPRI), Nasr City, Cairo 11727, Egypt
  • 通讯作者: Medhat Kamel

Abstract: A new surfactant of Gemini-type, N,N'-((phthylbis(oxy))bis(ethane-2,1-diyl))bis(N,N-dimethyldodecan- 1-aminium bromide) is prepped & confirmed. The dissolution suppression impact of the new compound on steel is performed in 1 mol·L-1 HCl environment by means of chemical and electrochemical methods. The prepared surfactant is an agreeable dissolution inhibitor for steel. The mitigation efficacy rises with the quantity of the compound. The surfactant belongs to inhibitors of mixed-type. The adsorption of the synthesized compound followed the Langmuir's model. The negative magnitudes of both ΔGadsθ and ΔHadsθ indicate that the adsorption process proceeds from its own accord and exothermic. The mechanism of adsorption is elucidated by scanning microscopy. It is established that the transfer resistance (Rct) value rose, where the value of the phase element (CPE) reduced with the amount of synthesized inhibitor. According to the experimental data arrived by surface tension measurements, the prepared compound is a powerful active agent at the air/water boundary.

Key words: Innovative Gemini surfactant, Synthesis, Dissolution mitigation, Steel, Pickling HCl media

摘要: A new surfactant of Gemini-type, N,N'-((phthylbis(oxy))bis(ethane-2,1-diyl))bis(N,N-dimethyldodecan- 1-aminium bromide) is prepped & confirmed. The dissolution suppression impact of the new compound on steel is performed in 1 mol·L-1 HCl environment by means of chemical and electrochemical methods. The prepared surfactant is an agreeable dissolution inhibitor for steel. The mitigation efficacy rises with the quantity of the compound. The surfactant belongs to inhibitors of mixed-type. The adsorption of the synthesized compound followed the Langmuir's model. The negative magnitudes of both ΔGadsθ and ΔHadsθ indicate that the adsorption process proceeds from its own accord and exothermic. The mechanism of adsorption is elucidated by scanning microscopy. It is established that the transfer resistance (Rct) value rose, where the value of the phase element (CPE) reduced with the amount of synthesized inhibitor. According to the experimental data arrived by surface tension measurements, the prepared compound is a powerful active agent at the air/water boundary.

关键词: Innovative Gemini surfactant, Synthesis, Dissolution mitigation, Steel, Pickling HCl media