Abstract
Almost every abiotic surface of a material is readily colonised by bacteria, algae, and fungi, contributing to the degradation processes of materials. Both biocorrosion and microbially influenced corrosion (MIC) refer to the interaction of microbial cells and their metabolic products, such as exopolymeric substances (EPS), with an abiotic surface. Therefore, biofouling and biodeterioration of manufactured goods have economic and environmental ramifications for the user to tackle or remove the issue. While MIC is typically applied to metallic materials, newly developed and evolving materials frequently succumb to the effects of corrosion, resulting in a range of chemical reactions and transport mechanisms occurring in the material. Recent research on biocorrosion and biofouling of conventional and novel materials is discussed in this paper, showcasing the current knowledge regarding microbial and material interactions that contribute to biocorrosion and biofouling, including biofilms, anaerobic and aerobic environments, microbial assault, and the various roles microorganisms’ play. Additionally, we show the latest analytical techniques used to characterise and identify MIC on materials using a borescope, thermal imaging, Fourier transform infrared (FTIR), atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron microscopy (XPS), X-ray diffraction (XRD), optical and epifluorescence microscopy, electrochemical impedance spectroscopy, and mass spectrometry, and chemometrics.
Highlights
The processes by which microbial organisms accelerate the corrosion rate of materials by microorganisms are generally referred to as biocorrosion, or microbially induced corrosion (MIC) [1–3]
The results showed that iron was present in the biofilm and on the material, showing that the biofilm was using the pipe system to facilitate corrosion
Where corrosion current Icorr is deduced from corrosion test coupons [i.e. stainless steel (SS)], ∆I is the change in current, and E is the change in potential
Summary
The processes by which microbial organisms accelerate the corrosion rate of materials by microorganisms are generally referred to as biocorrosion, or microbially induced corrosion (MIC) [1–3]. Materials that undergo microbial colonisation typically undergo chemical reactions, which are cathodic or anodic, or the establishment of differential oxygen concentration cells in a localised electrolytic environment. The economic cost of biocorrosion has been estimated to be at least 20% for material corrosion, amounting to a direct cost of 30–50 billion dollars per year globally [4]. Michelangelo’s statue of David underwent cleaning measures for the first time in 500 years and cost €165k [5]. The French have injected some $250 million into a corrosion clean-up and protection of the Eiffel Tower in 1989 [6]. Corrosion researchers and engineers have been interested in preventing biocorrosion for structural materials for decades. Numerous strategies, including biocides, cathodic protection, beneficial bacterial biofilms, and
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