Biofouling and corrosion of magnesium alloys WE43 and AM60 by Chlorella vulgaris in artificial seawater

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-03-29 DOI:10.1016/j.corsci.2025.112884

Qi Fu , Guang-Ling Song , Xinran Yao

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引用次数: 0

Abstract

There have been many studies on bacterial corrosion, but quite few on algae-induced corrosion. However, exposure to algae is inevitable when a metal is used in marine environments. Hence, the effect of algae on corrosion is potentially a critical issue, particularly for Mg alloys that are generally very susceptible to corrosion. In this paper, the biofouling and corrosion of magnesium (Mg) alloys WE43 and AM60 caused by Chlorella vulgaris (C. vulgaris), a typical marine microalga, were systematically investigated. The fluorescence images and sessile cell counting results proved that the antibacterial mechanism of the Mg alloys in medical field was not applicable in marine environments. C. vulgaris could adhere to the surfaces of WE43 and AM60, leading to the occurrence of biofouling and biocorrosion. Moreover, C. vulgaris tended to damage the surface film of the WE43 alloy more severely than that of the AM60 alloy, resulting in larger and deeper pits on the surface of the WE43 alloy. Liquid chromatography-mass spectrometry (LC-MS/MS) tests and etidronic acid (HEDP) addition experiments confirmed that the organic acids produced by C. vulgaris through photosynthesis were the main culprits for the dissolution or failure of the surface film. Meanwhile, the inorganic substance (NH₄)H₂PO₄ produced by C. vulgaris through respiration and high concentration of Cl⁻ could also promote the rupture of the surface film and aggravate the corrosion damage of Mg alloys. The mechanisms of the C. vulgaris induced corrosion and biofouling are proposed at last based on the experimental measurements in this paper.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.