Surface protection of steel in acid medium by Tabernaemontana divaricata extract: Physicochemical evidence for adsorption of inhibitor

被引：58

作者：

Rose, Kavitha ^{[2
,3
]}

Kim, Byoung-Suhk ^{[4
,5
]}

Rajagopal, Kalyanaraman ^{[6
]}

Arumugam, Sankar ^{[2
]}

Devarayan, Kesavan ^{[1
]}

机构：

[1] Tamil Nadu Fisheries Univ, Dept Basic Sci, Coll Fisheries Engn, Nagapattinam 611001, India

[2] Kandasamy Kandars Coll, Dept Chem, Salem 638182, India

[3] Dhirajlal Gandhi Coll Technol, Dept Chem, Salem 636005, India

[4] Chonbuk Natl Univ, Dept Organ Mat & Fiber Engn, 567 Baekje Daero, Jeonju Si 54896, Jeollabuk Do, South Korea

[5] Chonbuk Natl Univ, Dept BIN Convergence Technol, 567 Baekje Daero, Jeonju Si 54896, Jeollabuk Do, South Korea

[6] Vels Univ, Dept Biotechnol, Madras 600117, Tamil Nadu, India

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2016年 / 214卷

关键词：

Corrosion; Green inhibitor; Adsorption; Langmuir isotherm; CORROSION INHIBITION; MILD-STEEL; BEHAVIOR;

D O I：

10.1016/j.molliq.2015.12.008

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：

For the first time, the homogeneous adsorption of a green inhibitor on the surface of steel was evidenced using energy dispersive X-ray spectral elemental mapping. Inhibition of steel corrosion in 1.0 M hydrochloric acid by Tabernaemontana divaricata plant extract and the evidences for adsorption of the inhibitor are described in this study. The inhibition characteristics of the green inhibitor were evaluated by means of weight loss and electrochemical measurements. A maximum of 95% inhibition efficiency was achieved by using 500 ppm of inhibitor. The adsorption of green inhibitor was found to obey the Langmuir's isotherm model. Further, the energy dispersive spectral mapping revealed the homogeneous distribution of the nitrogen, which indicated for the presence of inhibitor on the steel surface. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：111 / 116

页数：6

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