Assessment of the corrosivity of AISI 1020 steel through microbiological analyzes and the mass loss technique in a clayey soil

Authors

DOI:

https://doi.org/10.33448/rsd-v12i6.41752

Keywords:

Clay soil; Corros will not; AISI 1020 steel; Mass loss rate; Microbiological analysis.

Abstract

This search aims to evaluate the corrosivity of AISI 1020 steel in clayey soil through microbiological analyzes and the mass loss technique. Through the results obtained, according to the identification methodology of the Bergey manual, the presence of two microorganisms was verified, Acidithiobacillus thiooxidans and ferrooxidans , responsible for the biocorrosion process , in addition to filamentous fungi. The presence of these bacteria does not generate a classification for the soil, however, it is known that they can accelerate the corrosion process when in contact with a metallic structure. Regarding the mass loss rate, a criterion used to simulate the assessment of corrosivity in pipes, NACE Standard RP-07-75 was adopted, which defined the intensity of the corrosive process, obtaining as a result for the sterilized sample a value considered low, since it was free of microbial activities and any other contaminating factor, but for the sample without sterilization, the soil was classified as having severe potential. Therefore, this research sought to correlate the characteristics of the soil representative of the Amazon with a process of corrosion of buried pipes due to the presence of microorganisms, which would correspond to a microbiological corrosion. Although, in many cases, there is suspicion of the accuracy of corrosion monitoring techniques, mass loss and microbiological identification techniques were used, which had a positive result in relation to the microbiological one.

Author Biographies

Takeshi Matsuura, Federal University of Amazonas

Possui graduação em Farmácia com habilitação em Análises Clínicas pela Universidade Federal do Amazonas (1992 e 1993), especialização em Biotecnologia pela Universidade Federal do Amazonas (1996), mestrado em Ciências Farmacêuticas pela Universidade Federal de Pernambuco (1998) e doutorado em Ciência de Alimentos pela Universidade Estadual de Campinas (2004). É Professor Associado I da Universidade Federal do Amazonas. Tem experiência na área de Microbiologia, com ênfase em Screening de microrganismos produtores de compostos bioativos, atuando principalmente nos seguintes temas: actinomicetologia, atividade antimicrobiana, biodiversidade e ecologia bacteriana da amazônia. Desenvolve atividades na área de Biossegurança com foco na produtividade das empresas.

Paulo Rogerio da Costa Couceiro, Federal University of Amazonas

Possui graduação em Bacharelado em Química pela Universidade Federal do Amazonas (1992), mestrado em Química de Produtos Naturais pela Universidade Federal do Amazonas (1998) e doutorado em Química pela Universidade Federal de Minas Gerais (2004). Atualmente é professor associado em Físico-Química, do Departamento de Química da Universidade Federal do Amazonas. Tem ampla experiência administrativa e acadêmica, como Chefe de Departamento, Coordenador de Graduação em Química, Coordenador de Pós-Graduação em Química e Coordenador Geral do PARFOR/CAPES. Na pesquisa atua na área de Físico-Química, com ênfase em materiais e espectroscopia, com destaques nos seguintes temas: espectroscopia Mössbauer, difração de raios X e refinamento Rietveld, óxidos de ferro não e magnéticos (naturais e sintéticos) e argilomineral, peneira molecular MCM, zeólitas, carvões e compósitos de Fe/C.

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Published

05/06/2023

How to Cite

MACHADO, . A. P. .; MATSUURA, T.; COUCEIRO, P. R. da C. . Assessment of the corrosivity of AISI 1020 steel through microbiological analyzes and the mass loss technique in a clayey soil. Research, Society and Development, [S. l.], v. 12, n. 6, p. e1112641752, 2023. DOI: 10.33448/rsd-v12i6.41752. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/41752. Acesso em: 4 may. 2024.

Issue

Vol. 12 No. 6

Section

Exact and Earth Sciences

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Copyright (c) 2023 Ariadne Pimentel Machado; Takeshi Matsuura; Paulo Rogerio da Costa Couceiro

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