Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System

被引：3

作者：

Sahayaraj, J. Wilson ^{[1
]}

Amalraj, A. John ^{[2
]}

Rajendran, Susai ^{[3
,4
]}

Vijaya, N. ^{[5
]}

机构：

[1] Jeppiaar Engn Coll, Dept Chem, Madras 600119, Tamil Nadu, India

[2] Peiryar EVR Coll, Dept Chem, Tiruchirappalli, Tamil Nadu, India

[3] RVS Sch Engn & Technol, Dept Chem, Dindigul City, Tamil Nadu, India

[4] GTN Arts Coll, Post Grad & Res Dept Chem, Corros Res Ctr, Dindigul 624005, Tamil Nadu, India

[5] Vellalar Coll Women, Dept Chem, Erode, India

来源：

E-JOURNAL OF CHEMISTRY | 2012年 / 9卷 / 04期

关键词：

Carbon steel; Corrosion inhibition; Sodium molybdate; Synergistic effect; Antagonistic effect; CORROSION INHIBITION; ALUMINUM; RESISTANCE; TUNGSTATE; COATINGS; STEEL; WATER;

D O I：

10.1155/2012/368147

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The inhibition efficiency(IE) of sodium molybdate (SM) in controlling corrosion of carbon steel in an aqueous solution containing 120 ppm of Cl-, in the absence and presence of Zn2+ has been evaluated by weight-loss method. A synergistic effect exists between SM and Zn2+ when the concentration of Zn2+ is 25 ppm and above. Inhibition efficiencies obtained are greater than 85%. Antagonistic effect exists between SM and Zn2+ when the concentration of Zn2+ is 10 ppm and below. The SM-Zn2+ system shows excellent IE up to third day. Above third day IE decreases. Acceleration of corrosion takes place. Excellent IE is shown at pH 5,7 and 12. At pH 9, IE decreases since Zn2+ is precipitated as Zn(OH)(2) in the bulk of the solution. Polarization study reveals that SM-Zn2+ system functions as a mixed inhibitor. FTIR spectra reveal that the protective film consists of Fe2+-SM complex and Zn(OH)(2).

引用

页码：1746 / 1752

页数：7

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