Corrosion resistance of α- and (α plus β)-Brasses in a descaling solution by a mixture of imidazole and hexadecyltrimethylammonium bromide

被引:29
作者
Bidi, Hanane [1 ]
Lgaz, Hassane [2 ]
Touhami, Mohamed Ebn [1 ]
Baymou, Yacine [1 ]
Seung-Hyun, Kim [2 ]
Kwon, Chang [2 ]
Park, Sung-Kyu [2 ]
Hassani, Yacine [1 ]
Chung, Ill-Min [2 ]
机构
[1] Univ Ibn Tofail, Lab Ingn Mat & Environm Modelisat & Applicat, Fac Sci, BP 133, Kenitra 14000, Morocco
[2] Konkuk Univ, Coll Sanghur Life Sci, Dept Crop Sci, Seoul 05029, South Korea
关键词
Corrosion inhibition; alpha-Brass; (alpha plus beta)-brass; Electrochemical techniques; SEM; ICPS; MILD-STEEL; CETYLTRIMETHYLAMMONIUM BROMIDE; ELECTROCHEMICAL-BEHAVIOR; INHIBITION BEHAVIOR; SODIUM GLUCONATE; BRASS; ACID; DERIVATIVES; COPPER; INSIGHTS;
D O I
10.1016/j.colsurfa.2020.125399
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Scaling is a major problem in many industrial processes. Oxide scales often formed on the surface of metals and alloys, and it is of high interest to descale it using effective and environment-friendly methods. Herein, the corrosion inhibition effect of the imidazole (IMI) mixed with the Hexadecyltrimethylammonium bromide (CTAB) for alpha- and (alpha + beta)-brasses in a descaling solution (sulfamic (2%) and perchloric (4%) mixture) is studied at 295 K using electrochemical (potentiodynamic polarization measurements (PDP) and electrochemical impedance measurements (EIS)), inductively coupled plasma spectrometry (ICPS) and scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDX) techniques. Results show that the imidazole/CTAB mixture acts via adsorption at the alloy/solution interface. Potentiodynamic polarization results reveal that the imidazole/CTAB mixture behaves as a mixed type corrosion inhibitor. At the same time, those from EIS tests show that alpha-brass has a higher corrosion resistance compared to that of (alpha + beta)-brass. Under optimum conditions, an inhibition efficiency of 95 % is achieved for both brasses. The morphological characterization by SEM/EDX and ICPS analysis confirms the efficacy of the mixture in protecting alpha- and (alpha + beta)-brasses against corrosion by decreasing the dezincification factor. This study provides a new approach to control the brass loss and achieve desired surface quality using a less corrosive descaling solution and imidazole/CTAB as anti-corrosive additive.
引用
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页数:9
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