Experimental and theoretical structural analysis of Zn(II)-1-hydroxyethane-1,1-diphosphonic acid corrosion inhibitor films in chloride ions solution

被引：26
|
作者：
Reznik, L. Y. [1 ]
Sathler, L. [1 ]
Cardoso, M. J. B. [2 ]
Albuquerque, M. G. [3 ]
机构：
[1] Univ Fed Rio de Janeiro, Lab Corrosao, COPPE PEMM, BR-21949900 Rio De Janeiro, Brazil
[2] Ctr Pesquisa & Desenvolvimento CENPES, PETROBRAS SA, BR-21949900 Rio De Janeiro, Brazil
[3] Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Organ, Lab Modelagem Mol LabMMol, BR-21949900 Rio De Janeiro, Brazil
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2008年 / 59卷 / 08期
关键词：
D O I：
10.1002/maco.200804108
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work aims to analyze, through weight loss and X-ray photoelectron spectroscopy (XPS) methods, the inhibitive films of 1-hydroxyethane-1,1-diphosphonic acid (1-hydroxyethylidene-1,1-diphosphonic acid, HEDP) and zinc(II) ions formed on AISI 1020 carbon steel when immersed in solutions containing 30 ppm of chloride ions, 50 ppm of HEDP, and three different concentrations of zinc(II) ions (14, 20, and 30 ppm). Moreover, the results of the experimental surface analyses were compared to molecular modeling Studies of the proposed HEDP-Fe(III)/Zn(OH)(2)/HEDP-Zn(II) protective film. The film presented dissimilar structures responsible for the different levels of metallic protection for each particular zinc(II) concentration. In general, the increase in Zn(II) concentration leads to more compact and adherent film formation, with decreased corrosion rates of carbon steel.
引用
收藏
页码：685 / 690
页数：6
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