Defining patterns in the influence exerted by the interelated biochemical corrosion on concrete building structures under the conditions of a chemical enterprise

Oksana Shkromada,Yuliia Litsman,Olena Shersheniuk,Viktoriia Ivchenko,Іryna Kyrchata,Vadym Chivanov,Hennadii Tsyhanenko,Liudmyla Tsyhanenko,Volodymir Moskalenko

doi:10.15587/1729-4061.2021.226587

Abstract

The effect of microbial and chemical corrosion on concrete structures operated in the conditions of chemical enterprises has been established that makes it possible to reliably predict the timing of their decommissioning in order to prevent industrial disasters. Even though the construction complies with all building codes, concrete structures eventually undergo chemical and biological corrosion. The innovation proposed in this study implies investigating the depth and degree of damage to concrete at the microscopic level by the method of raster electron microscopy. In addition, the TPD-MS method has been suggested for determining the quantitative and qualitative state of the carbonate components of concrete and sulfur compounds. This study has found that in concrete samples from the titanium dioxide production plant, the amount of carbon dioxide release is twice less than in control samples at t=600 °C while the level of sulfur dioxide, on the contrary, increases. This is due to the ability of thionic bacteria to accumulate sulfate acid that destroys the cementing component in concrete. The reported results confirm the impact of products of the activity of Acidithiobacillus thiooxidans microorganisms on corrosion processes in concrete. In addition, when using the TPD-MS method, it was established in the storage room of the finished product that heating the control sample of concrete leads to a release of the significant amount of СО2 at t=580–600 °C. However, the experimental samples of concrete are almost lacking carbon compounds because the acid metabolites of microfungi interfere with its formation. Microscopic and REM studies revealed the localization of Acidithiobacillus thiooxidans and Aspergillus fumigatus in concrete. This study has established patterns related to the mechanism that forms chemical compounds in concrete and the metabolism of microorganisms

Highlights

Most premises for industrial enterprises are made of concrete and reinforced concrete structures
It has been experimentally proved that the titanium dioxide production shop and the mineral fertilizer storage facility undergo interrelated processes of chemical and biological corrosion of concrete structures, which poses a danger for the further operation of the structure
We have experimentally established the growth of the thionic bacteria A. thiooxidans [20] on the surface of con

Summary

Introduction

Most premises for industrial enterprises are made of concrete and reinforced concrete structures. In the titanium dioxide production plant, there is constant chemical corrosion due to the release of free sulfur and its oxides In this environment, thionic bacteria grow well. The identification of patterns of influence of interrelated microbial and chemical corrosion of concrete building structures at a chemical enterprise requires determining the methods for studying corrosion processes in concrete on different surface layers at the microscopic level. This would make it possible to predict the service life of concrete structures and determine the degree of corrosion processes over time, which explains the relevance of related studies

Literature review and problem statement

The aim and objectives of the study

Materials and methods to study the biochemical corrosion of concrete

Discussion of results of studying the biochemical corrosion of concrete

Conclusions