Corrosion behavior of 2024 aluminum alloy anodized in sulfuric acid containing inorganic inhibitor

Maysam Mohammadi, Ali Yazdani, Farzad Mohammadi, Akram Alfantazi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

The effects of potassium permanganate, as a corrosion inhibitor, in different concentration on morphology, composition and thickness as well as corrosion resistance of anodic film formed on 2024-T3 aluminum alloy in sulfuric acid were investigated in this paper. Surface morphology and chemical composition of oxide film were studied using field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDX). Potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS) were conducted to assess the corrosion performance of the coatings. The results showed that presence of potassium permanganate during anodizing process results in more compact and thicker anodic film with smaller pore size. Effects of potassium permanganate increased with concentration. Using permanganate ions improved corrosion resistance of the formed anodic layer, which is about 45% and 94% inhibition for 0.01 and 0.1M permanganate, respectively.

Original languageBritish English
Title of host publicationMinerals, Metals and Materials Series
EditorsBarry A. Sadler
Pages509-513
Number of pages5
DOIs
StatePublished - 2016
Event142nd Annual Meeting and Exhibition, TMS 2013 - San Antonio, United States
Duration: 3 Mar 20137 Mar 2013

Publication series

NameMinerals, Metals and Materials Series
Volume0
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

Conference142nd Annual Meeting and Exhibition, TMS 2013
Country/TerritoryUnited States
CitySan Antonio
Period3/03/137/03/13

Keywords

  • Al-2024 alloy
  • Anodic film
  • Corrosion inhibitor

Fingerprint

Dive into the research topics of 'Corrosion behavior of 2024 aluminum alloy anodized in sulfuric acid containing inorganic inhibitor'. Together they form a unique fingerprint.

Cite this