Evaluation of the inhibitor effect of L-ascorbic acid on the corrosion of mild steel

被引：803

作者：

Ferreira, ES ^{[1
]}

Giacomelli, C ^{[1
]}

Giacomelli, FC ^{[1
]}

Spinelli, A ^{[1
]}

机构：

[1] Univ Fed Santa Catarina, GEPEEA, Dept Quim, BR-88040900 Florianopolis, SC, Brazil

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2004年 / 83卷 / 01期

关键词：

mild steel; L-ascorbic acid; acid inhibition; organic inhibitors;

D O I：

10.1016/j.matchemphys.2003.09.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence Of L-ascorbic acid (AA) on mild steel corrosion in pH = 2-6 solutions was investigated using electrochemical and weight loss techniques. Optical microscopic analyses provided the surface condition. The maximum inhibitor efficiency has been found in 10(-3) mol dm(-3) AA, pH = 4, solutions (69%). In these conditions, AA acts as a mixed-type inhibitor. Activation energies of 49.4 and 65.7 kJ mol(-1) for the corrosion processes were observed in absence and presence of AA, respectively. The AA inhibitor effect could also be evidenced by surface optical images. (C) 2003 Published by Elsevier B.V.

引用

页码：129 / 134

页数：6

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