Influence of sodium sulphite on corrosion inhibition by the sodium gluconate

Influence of sodium sulphite on corrosion inhibition by the sodium gluconate –Zn2+ system

Published:2001-12-01 Issue:6 Volume:48 Page:371-375
ISSN:0003-5599
Container-title:Anti-Corrosion Methods and Materials
language:en
Short-container-title:

Author:

Amalraj A. John,Sundaravadivelu M.,Pascal Regis A. Peter,Rajendran S.

Abstract

The inhibition efficiency of sodium gluconate (SG) in controlling corrosion of carbon steel immersed in the environment containing 60 ppm Cl– has been evaluated in the presence and absence of Zn2+ by weight loss method. SG and Zn2+ show a synergistic effect. The protective film has been analysed by FTIR and fluorescence spectra. The protective film consists of Fe2+‐gluconate complex and Zn(OH)2. The film is found to be UV‐fluorescent. The IE of the SG‐Zn2+ system increases in the presence of Na2SO4; but decreases in the presence of Na2SO3 and also in the presence of N‐cetyl‐N,N,N‐trimethyl ammonium bromide. This study reveals that the transporting phenomenon plays a larger role than the scavenging of dissolved oxygen.

Publisher

Emerald

Subject

General Materials Science,General Chemical Engineering

Reference16 articles.

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