Study of the corrosion behavior of Aspergillus niger on 7075-T6 aluminum alloy in a high salinity environment

Junlei Wang; Fuping Xiong; Hongwei Liu; Tiansui Zhang; Yanyan Li; Chenjing Li; Wu Xia; Haitao Wang; Hongfang Liu

doi:10.1016/j.bioelechem.2019.04.020

Study of the corrosion behavior of Aspergillus niger on 7075-T6 aluminum alloy in a high salinity environment

Bioelectrochemistry. 2019 Oct:129:10-17. doi: 10.1016/j.bioelechem.2019.04.020. Epub 2019 May 1.

Authors

Junlei Wang¹, Fuping Xiong¹, Hongwei Liu¹, Tiansui Zhang¹, Yanyan Li¹, Chenjing Li¹, Wu Xia¹, Haitao Wang², Hongfang Liu³

Affiliations

¹ Key Laboratory of Materials Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
² Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China.
³ Key Laboratory of Materials Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: liuhf@hust.edu.cn.

PMID: 31075534
DOI: 10.1016/j.bioelechem.2019.04.020

Abstract

In this study, the corrosion behavior of 7075-T6 aluminum alloy in a high salinity environment containing Aspergillus niger was investigated using high-performance liquid chromatography tandem mass spectrometry, gas chromatography, surface analysis and electrochemical measurement. Results demonstrated that uniform and localized corrosion rates of the alloy in the presence of A. niger were approximately 3.7 and 22.4 times, respectively, of that in the absence A. niger. This higher corrosion rate was attributed to accelerated anode and cathode reactions from the actions of A. niger biofilm. Additionally, organic acid corrosion caused by the presence of A. niger was confirmed to be the main cause for the corrosion of aluminum alloy.

Keywords: Aluminum alloy; Aspergillus Niger; Corrosion; Electrochemistry; Microbiology.

MeSH terms

Alloys / chemistry*
Aluminum / chemistry*
Aspergillus niger / physiology*
Biofilms / growth & development
Corrosion
Electrochemical Techniques
Electrodes / microbiology
Salinity
Surface Properties

Substances

Alloys
Aluminum