Abstract
In the present investigation, the corrosion behaviour of 6082-T6 Al alloy plates joined by friction stir welding (FSW) were evaluated. The effects of weld process parameter like welding speeds as well as pin profiles on corrosion behaviour were investigated. The plates of AA6082-T6 were friction stir welded at rotational speed of 1600-1650rpm using three different tool pin profiles like four flute pin, triangular pin and hexagonal pin, with different welding speeds (typically, 50, 62, 68, 70, and 74 mm/min). The corrosion tests of base alloy and welded joints were carried out in 3.5% NaCl solution at a room temperature. Corrosion current and potential were determined using potentiostatic polarization measurements. The pitting potentials of corrosion tested samples at various process parameters clearly indicated a greater corrosion resistance of weld metal than base alloy.
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