Open AccessEffect of rotational speed and tool pin profile on the corrosion rate of friction stir welded AA6061-T3
Author(s) -
Waseem Abbas,
Muhaed Alali,
Ja’far Salim
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1090/1/012124
Subject(s) - corrosion , friction stir welding , rotational speed , materials science , tafel equation , welding , metallurgy , base metal , alloy , composite material , chemistry , electrochemistry , physics , electrode , quantum mechanics
In this study, the corrosion behaviour of friction stir welding (FSW) of AA6061-T3 alloy was investigated. The FSW was performed under two different rotation speed (850 and 950 rpm) and constant travelling speed (22 mm/min). Two tool pin profiles (straight cylindrical and conical types) were utilised to study their impact on corrosion resistance. The corrosion behaviour of the base metal (BM) and weld zone were studied by Tafel polarisation cell using 3.5wt.% NaCl and 3.5wt.% KCl solutions at ambient temperature. The results showed that the welded alloy exhibits lower corrosion resistance than the BM. Lower rotational speed (850 rpm) produced weld with higher corrosion resistance in both NaCl and KCl media. Conical tool pin profile produced weld with corrosion resistance higher than the straight cylinder pin in both NaCl and KCl media. NaCl recorded higher corrosion rate with almost twice of the KCl for all welding conditions.