Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
Corrosion Behavior of Mild Steel in Organic Solutions of One Component and Multicomponent Systems
Isao SekineMakoto YuasaIchiro Kani
Author information
JOURNAL FREE ACCESS

1997 Volume 46 Issue 7 Pages 424-435

Details
Abstract

The corrosion behavior of SS 400 (mild steel) was investigated in one component system of pure organic solvents (acetic acid, ethanol, diethylamine and acetone) and multi-component system of organic solutions containing additive agents (water, lithium perchlorate, sulfuric acid and nitric acid) by the corrosion weight loss tests, electrochemical measurements and surface analyses. From these results, the corrosion of mild steel was remarkably promoted by sulfuric acid and nitric acid in organic solutions. The corrosion rate increased in strong basic solvent (ethanol), and decreased in weak basic solvent (acetic acid) by addition of sulfuric acid. The passive state region was observed in wide potential range on anodic polarization curves, and the rest potential existed in passive state region in non-corrosion systems. In a.c. impedance measurements, the charge transfer process was observed in remarkable corrosion systems, and the film resistance of passive state was increased in non-corrosion systems. In surface analysis by XPS, the salt film of acetate on steel surface was observed in acetic acid of corrosion system, while the passive film made up by adsorption of solvent molecules and the oxides was observed in ethanol or acetone of non-corrosion systems.

Content from these authors
© Japan Society of Corrosion Engineering
Previous article Next article
feedback
Top