Description:
<jats:p>The current research has assessed the correlation between welding parameters and corrosion
behaviour for friction stir welded 6056 aluminium alloy. Different thermal treatments and welding
parameters were considered. For the welding parameters studied in this project, the data strongly
indicate that sensitivity to corrosion is linked to the welding parameters employed. Substantial
differences were found for the higher and lower speed welding parameters, with the lower speed
parameters appearantly resulting in less corrosion resistance. The most widespread form of
corrosion observed was pitting; however, intergranular corrosion (IGC) was also seen. While the
T78 thermal treatment appears to decrease the corrosion resistance of the parent alloy, the weld
region tends to improve, with the nugget being cathodic.</jats:p>