Fungi corrosion of high-strength aluminum alloys with different microstructures caused by marine Aspergillus terreus under seawater drop. (March 2023)

• Record Type: Journal Article
• Authors: Zhang, Yuxuan; Liu, Haixian; Jin, Zhengyu; Lai, Huansheng; Liu, Hongfang; Liu, Hongwei
• Is Part Of: Corrosion science. Volume 212(2023)
• Publication Date: 2023-03
• Subjects: Fungi corrosion -- High-strength aluminum alloys -- Aspergillus terreus -- Seawater drop -- Localized corrosion -- Atmosphere corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2023.110960
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: Fungi corrosion of aluminum alloys (AA) in atmospheric conditions is a hot topic. In this work, fungi corrosion studies of high-strength aluminum alloys (named AA 7075–1# and AA 7075–2#) were conducted. Results demonstrate that AA 7075–2# with a big grain size suffers from severe localized corrosion caused by Aspergillus terreus with the biggest value of 4.08 mm/y. A. terreus have good biological activities, and the sessile spores in 30 µL droplet can reach 2.51 × 10 10 spores/cm 2 after 17 days of testing. Corrosion of AA under seawater drop is a result of multi-factor coupling, but the contribution of A. terreus is dominant. Graphical Abstract: ga1 Highlights: Microstructure characterization and corrosion of aluminum alloys (AA) are studied. The big droplet can promote the corrosion acceleration of abiotic and biotic specimens. Acid corrosion in seawater drops in the biotic environment can be neglected. The damage of passive film is accelerated by A. terreus .