L-METHIONINE METHYL-ESTER HYDROCHLORIDE AS A CORROSION-INHIBITOR OF IRON IN ACID CHLORIDE SOLUTION

被引：85

作者：

HAMMOUTI, B ^{[1
]}

AOUNITI, A ^{[1
]}

TALEB, M ^{[1
]}

BRIGHLI, M ^{[1
]}

KERTIT, S ^{[1
]}

机构：

[1] ECOLE NORMALE SUPER TAKADDOUM,PHYSICOCHIM MAT LAB,RABAT,MOROCCO

来源：

CORROSION | 1995年 / 51卷 / 06期

关键词：

ACID; ADSORPTION; AMINOESTERS; AQUEOUS SOLUTIONS; HYDROCHLORIC ACID; INHIBITORS; IRON; L-METHIONINE METHYL ESTER;

D O I：

10.5006/1.3293606

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Some aminoester organic compounds were tested as corrosion inhibitors for iron in molar hydrochloric acid (HCl) by mass-loss and electrochemical polarization methods. Both techniques gave the same order of inhibition. comparison of results among those aminoesters showed L-methionine methyl ester (METOCH(3)) was the best inhibitor. Its inhibition efficiency (E%) reached a maximum value of 95% at 10(-2) M. Polarization measurements indicated METOCH(3) acted as a cathodic inhibitor without changing the mechanism of the hydrogen evolution reaction. METOCH(3), was adsorbed on the iron surface according to a Frumkin isotherm model. The effect of temperature indicated that E% of METOCH(3) increased with increasing temperature in the range of 20 degrees c to 50 degrees C.

引用

页码：411 / 416

页数：6

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