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

• 作者: Medhat Kamel Mohamed Hegazy Salah Rashwan Mohamed El Kotb
• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: Chemical Engineering Thermodynamics
• 页码范围: 125-133
• 页数: 9页
• 语种: 英文

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 ΔHadsθindicate 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.