Influence of iodide ions on inhibitive performance of tetraphenyl-dithia-octaaza-cyclotetradeca-hexaene (PTAT) during pickling of mild steel in hot sulfuric acid

被引：78
作者：
Quraishi, MA [1 ]
Rawat, J [1 ]
机构：
[1] Aligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Corros Res Lab, Aligarh 202002, Uttar Pradesh, India
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2001年 / 70卷 / 01期
关键词：
pickling corrosion inhibitor; potentiodynamic polarization; hydrogen permeation; weight-loss; macrocyclic;
D O I：
10.1016/S0254-0584(00)00459-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A macrocyclic compound, namely 2,3,9,10-tetraphenyl-6,13-dithia-1,4,5,7,8,11,12,14-octaaza-cyclotetradeca-1,3,6,8,10,13-hexaene (PTAT) was synthesized to study the corrosion inhibitive effect on pickling of mild steel in 20% H2SO4 at 95 degreesC. The synergistic effect of this compound was studied by weight-loss, potentiodynamic polarization, electrochemical impedance spectroscopy and hydrogen permeation studies. The results of this investigation have shown enhancement in inhibition efficiency (IE) for 500 ppm PTAT in the presence of 0.25% KI as a synergent. Formulated inhibitor has shown better performance than commercial corrosion inhibitor (Metasave). Potentiodynamic polarization studies showed that PTAT is a predominantly cathodic inhibitor whereas Metasave is mixed in nature. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：95 / 99
页数：5
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