EBSD Characterization of 7075 Aluminum Alloy and Its Corrosion Behaviors in SRB Marine Environment

Aluminum alloy 7075 is an important engineering material for ship structures. However, the corrosion of Al alloys generally exists in various environments, especially marine environment. Currently, behaviors sulfate-reducing bacteria (SRB) environment has not been well-addressed. In this paper, effect SRB on aluminum was studied by adding to real seawater. The microstructure and grain orientation super-hardness were via electron back-scattered diffraction (EBSD)technology, electrochemical impedance spectroscopy (EIS) test behavior a variety microorganisms, mainly SRB, seawater continuously performed 21 days. It concluded that strongest texture intensity (001), (111), (010), (0–10) planes, which 2.565. Adding accelerated rate, after 14th day, protective film surface completely broken, significantly reduced.