The effect of cryogenic CO2 cooling on corrosion behaviour of friction stir welded AA2024-T351

M Jariyaboon, Alison Davenport, R Ambat, Brian Connolly, SW Williams, DA Price

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Cryogenic cooling with CO2 was applied during friction stir welding of AA2024-T351 in order to reduce the temperature increase during welding, and thus improve the corrosion resistance of the weld. The effect of cryogenic cooling on corrosion susceptibility was investigated with gel visualisation, immersion tests and local electrochemical measurements. The most susceptible area for both uncooled and cooled welds was in the heat-affected zone (HAZ) region, which showed intergranular attack. Cryogenic cooling had no detectable influence on the degree of anodic reactivity in the weld region. However, it did decrease the width of the reactive HAZ.
Original languageEnglish
Pages (from-to)425-432
Number of pages8
JournalCorrosion Engineering Science and Technology
Volume44
Issue number6
DOIs
Publication statusPublished - 1 Dec 2009

Keywords

  • Friction stir welding
  • Corrosion
  • Aluminium alloy
  • CO2 cooling

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