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Titre : Corrosion due to microorganisms Type de document : texte imprimé Auteurs : Vinay Kumar Pataskar, Auteur ; Durgesh Kumar Soni, Auteur Année de publication : 2017 Article en page(s) : p. 116-121 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biodégradation
Corrosion microbienneIndex. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : Corrosion due to microorganisms is also known as biocorrosion or Microbiologically Influenced Corrosion (MIC). There are several types of microorganisms present in environnent that cannot be seen individuatly with the unaided human eye like bacteria, archaea, fungi etc., which are responsible for corrosion of metals via electrochemical mechanism and deterioration of non-metallic materials. The biocorrosion takes place due to the fixation of bacteria, release of metabolites and formation of biofilms that induce or accelerate the corrosion process. This type of corrosion takes the most severe form in soils, saline environment and humid environment. It is estimated that about 20% of all damages caused by corrosion are influenced by microorganisms ; hence it is very important to understand the basic mechanism of microbial corrosion in order to minimize the fosses and accidents due to corrosion in various industries. This review describes the types of microorganisms which are responsible for bio corrosion and the mechanism behind this corrosion. Note de contenu : - INTRODUCTION : The influence of microorganisms on corrosion process
- THE ROLE OF BIOFILMS : Stages of biofilm formation
- PRINCIPLES OF MICROBIAL LIFE
- TYPES OF MICROORGANISMS INVOLVED IN MIC : Prokayotes - Eukaryota
- CORROSION BACTERIA : Acid producing bacteria - Metal reducing bacteria - Metal depositing bacteria - Iron oxidizing bacteria - Sulfur oxidizing bacteria
- CAUSATIVE ORGANISMS AND POSSIBLE MECHANISMS : Ennoblement - Concentration cell - Alteration of anion ratios - Reactions within biofilms
- MICROBIAL DEGRADATION OF POLYMERS
- FIGURES : 1. A typical figure of microbial corrosion on iron surface - 2. Microbiological process and electrochemical corrosion - 3. Stages of biofilm formation - 4. Biocorrosion process promoted by some types of corrosive bacteria - 5. Action of SRB - 6. reactions due to SRB - 7. Biological sulfur cycle in nature - 8. Formation of concentration cells - 9. Pitting corrosion due to microbes
- TABLES : 1. Prerequisites for the growth of microorganisms - 2. Examples for electron acceptors - 3. Conditions under which microbial life is observed - 4. Bacteria associated with biocorrosion and their respective local of isolation and damaging actions - 5. MIC in industrial environmentsEn ligne : https://drive.google.com/file/d/1oFCyH0uw1ESlpljxqlkZWjxeqibKa7J7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28878
in PAINTINDIA > Vol. LXVII, N° 5 (05/2017) . - p. 116-121[article]Réservation
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