Effects of Spinning Process on Intergranular Corrosion Behavior of 5A06 Aluminum Alloy

Abstract

Aluminum alloy tubes were prepared by tube spinning. The intergranular and electrochemical corrosion tests were used to investigate the intergranular corrosion behavior of the 5A06 aluminum alloy blank sample and the spinning sample. Results showed that the intergranular corrosion resistance of the spinning sample was higher than that of the blank sample. In addition, the electrochemical corrosion resistance of the spinning sample was higher than that of the blank sample. The EDS maps indicated a uniform element distribution pattern of aluminum and magnesium. Moreover, the phase composition and lattice constant of the samples were obtained by XRD analysis. The differences in microstructure between the aluminum alloy subjected to the spinning process and the untreated aluminum alloy were determined by EBSD. The differences were mainly attributed to the complex interactions among grain size, dislocations and grain boundaries.

Keywords

spinning process / 5A06 aluminum alloy / intergranular corrosion / EBSD