Corrosion Behavior of 7075-T6 Aluminum Alloy in the Presence of Aspergillus Niger

Abstract

Aspergillus niger is a fungus that can promote the corrosion of aluminum alloys. In this paper, the corrosion behavior of 7075-T6 aluminum alloy in the presence of Aspergillus niger was investigated with the corrosion weight-loss method, electrochemical tests, scanning electron microscopy (SEM), and inductively coupled plasma optical emission spectrometry (ICP-OES). The results showed that Aspergillus niger greatly promoted the corrosion behavior of 7075-T6 aluminum alloy, and the corrosion rate was 6–12 times that of the sterile system. The electrochemical results showed that the corrosion process of the aluminum alloy was promoted by Aspergillus niger, and a large number of corrosion pits appeared on the surface with increasing exposure time. The research results confirmed that Aspergillus niger can significantly promote the corrosion of aluminum alloys.