Abstract
Biodeterioration is one of the most important processes in metal pipeline corrosion, and it can be due to physical, chemical, and biological factors. Coatings rich in silver have been used to inhibit this undesirable phenomenon. In this study, the antimicrobial properties of several silver-containing products used as a coating in pipelines were determined on a pilot scale in order to evaluate the ability of silver to inhibit biofilm formation. The results showed that the coating with silver zeolite at a concentration of 2000 mg L–1 inhibited the formation of a microbial biofilm and prevented the biodeterioration process. Therefore, from our study, it can be concluded that silver zeolite shows greater protection capacity than other silver preparations and presents advantages in relation to other silver coatings that are currently available
Highlights
Corrosion is one of the most important processes in pipeline deterioration (Cheng, 2013)
Microbial communities that are commonly associated with pipeline corrosion include sulphate-reducing bacteria (SRB), acetogenic bacteria, and methanogens (Dinh et al, 2004; Liang et al, 2014; Okoro et al, 2016)
It was evident that the size of the biofilms was larger in the control section without treatment than in the section treated with a silver coating
Summary
Corrosion is one of the most important processes in pipeline deterioration (Cheng, 2013). Several kinds of microorganisms have been described as responsible for initiating or accelerating the corrosion process (Videla & Herrera, 2009). In this context, the formation of microbial biofilms affects different metal pipes, such as those in water distribution system. Biofilms are composed of an association of colonies of microorganisms and organic and/or inorganic material that causes corrosion of the pipes (McNeill & Edwards, 2001). Microbial communities that are commonly associated with pipeline corrosion include sulphate-reducing bacteria (SRB), acetogenic bacteria, and methanogens (Dinh et al, 2004; Liang et al, 2014; Okoro et al, 2016). The formation of biofilms can lead to serious hygiene problems and economic losses due to the
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