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首页> 美国卫生研究院文献>Materials >Adsorption and Corrosion Performance of New Cationic Gemini Surfactants Derivatives of Fatty Amido Ethyl Aminium Chloride with Ester Spacer for Mild Steel in Acidic Solutions
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Adsorption and Corrosion Performance of New Cationic Gemini Surfactants Derivatives of Fatty Amido Ethyl Aminium Chloride with Ester Spacer for Mild Steel in Acidic Solutions

机译：含酯间隔基的脂肪族酰胺基乙基氯化铵新型阳离子双子表面活性剂衍生物对低碳钢在酸性溶液中的吸附和腐蚀性能

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Three new cationic gemini surfactants with ester spacer type 2-2′-(ethane-1,2-diyl bis(oxy)) bis(N-(2-alkanamidoethyl)-N,N-dimethyl-2-oxoethan-1-aminium)) dichloride) (CGSES12, CGSES14 and CGSES16), based on , -dimethyl fatty amido ethylamine, were produced. These gemini quaternary ammonium salts were synthesized using a three-step reaction method, starting from th/e condensation of the fatty acid chloride (RCOCl) of various hydrophobic chain lengths (R, C H , C H , C H ) with , -dimethyl ethylene diamine, followed by the quaternization of the tertiary amino group formed with the spacer of the ester group formed in the second step. The chemical configuration of the surfactants was established by FT-IR, HNMR, CNMR and Mass spectroscopies. The inhibition performance of three surfactants was studied by weight loss and electrochemical measurements. The results show that CGSES12, CGSES14 and CGSES16 behave as effective inhibitors and surface agents. The maximum efficiency was higher than 94% at 2.5 mM, and the inhibition order was CGSES16 > CGSES14 > CGSES12. This was due to the increment in hydrophobicity of the gemini surfactants. Their adsorption on a mild steel surface followed the Langmuir isotherm. CGSES12, CGSES14 and CGSES16 can be considered mixed-type inhibitors. The presence of CGSES12, CGSES14 and CGSES16 increased charge transfer resistance and decreased the corrosion rate. The adsorption focused on heteroatoms and the surface properties of cationic gemini surfactants.
机译：三种新型酯间隔基2-2'-（乙烷-1,2-二基双（氧基））双（N-（2-烷酰胺基乙基）-N，N-二甲基-2-氧杂-1-胺的阳离子双子表面活性剂））基于二甲基脂肪酰胺基乙胺制备了二氯化物（CGSES12，CGSES14和CGSES16）。这些双子座季铵盐是通过三步反应方法合成的，该方法从各种疏水链长（R，CH，CH，CH 3）的脂肪酸氯化物（RCOCl）与β-二甲基乙二胺缩合开始，然后用在第二步中形成的酯基的间隔基对形成的叔氨基进行季铵化。通过FT-IR，HNMR，CNMR和质谱确定表面活性剂的化学构型。通过失重和电化学测量研究了三种表面活性剂的抑制性能。结果表明，CGSES12，CGSES14和CGSES16可作为有效的抑制剂和表面活性剂。在2.5 mM时，最大效率高于94％，抑制顺序为CGSES16> CGSES14> CGSES12。这是由于双子表面活性剂的疏水性增加。它们在Langmuir等温线之后吸附在低碳钢表面上。 CGSES12，CGSES14和CGSES16可以被视为混合型抑制剂。 CGSES12，CGSES14和CGSES16的存在增加了电荷转移阻力，并降低了腐蚀速率。吸附主要集中在杂原子和阳离子双子表面活性剂的表面性能上。

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