The Effect of Pin Traveling Speed in Friction Stir Welding on the Corrosion Behavior of Pure Copper in 3.5 wt %NaCl Solution

In this study, the effect of Friction Stir Welding (FSW) on the corrosion behavior of 1050 aluminium alloy in 3.5 wt.% NaCl solution was investigated.Is so doing, 1050 aluminium alloy was welded with the rotational speed of 250, 500 and 1000 rpm and traveling speeds of 14 and 56 mm per minute. The microstructure of 1050 aluminium al and welded 1050 aluminium alloy was examined by X-ray diffraction.Corrosion behavior of the samples was evaluated in 3.5 wt.% NaCl solution using Tafel polarization tests and electrochemical impedance spectroscopy. The results showed that Friction Stir Welding (FSW) decreases the grain size of 1050 aluminium al and improve the corrosion resistance of stir zone. X-ray diffraction pattern was similar for 1050 aluminium alloy and welded samples indicating the absence of unwanted phases in the structure. Given the curves of Tafel polarization and the results from modeling through electrical equivalent circuit expressed that for 1050 aluminium alloy welded by FSW with pin travelling speed equaled to 56 mm per minute with rotating speed equaled to 500 rpm, the most polarization resistance was obtained and it has also shown the least hardness in the hardness test compared to the other samples.