RHIZOPHORA APICULATA AS ECO-FRIENDLY INHIBITOR AGAINST MILD STEEL CORROSION IN 1M HCL

被引：19

作者：

Asaad, Mohammad Ali ^{[1
]}

Ismail, Mohammad ^{[1
]}

Raja, Pandian Bothi ^{[2
]}

Khalid, Nur Hafizah A. ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Dept Civil Engn, Utm Johor Bahru 81310, Johor, Malaysia

[2] Univ Teknol Petronas, Ctr Corros Res, Tronoh 32610, Perak, Malaysia

来源：

SURFACE REVIEW AND LETTERS | 2017年 / 24卷

关键词：

Rhizophora apiculata; mild steel; corrosion inhibition; plant extract; weight loss; adsorption; HYDROCHLORIC-ACID; MANGROVE TANNIN; EXTRACT; COPPER; MEDIA;

D O I：

10.1142/S0218625X18500130

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：

The inhibitive characteristics of aqueous extracts from mangrove (Rhizophora apiculata) bark and leaf on the corrosion of mild steel (MS) coupon in 1M HCl were examined by means of the gravimetric measurement (weight loss), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The MS surface morphologie were investigated using field emission scanning electron microscopy (FESEM) with Energy Dispersive X-Ray Analysis (EDX) at 120 h in the presence and absence of green inhibitors in corrosive medium. Respective inhibition efficiencies of 68.1% and 59.0% were obtained when exposed to 10% v/v Rhizophora apiculata solution for 72 h. Examination of the adsorption behavior of the solutions indicated the Langmuir isotherm model as being the most likely relevant adsorption mechanism. In addition, polarization measurements showed that both bark and leaves extract inhibitors act via mixed type inhibition.

引用

页数：11

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