Hello the iron bioleaching microorganisms can cause corrosion based on oxygen formed from superoxide dismutase activity.

yes Karen,

That was a nice pic from your observations . Thanks for sharing. Happy to see you be part of this.

Microbiologically influenced corrosion (MIC) occurs when microorganisms produce corrosive metabolites or form biofilms, accelerating material degradation, particularly in infrastructure. Prevention involves biocides, coatings, and microbial monitoring.

HI AbdulRazaq

Have you experienced corrosion causing bacteria linked to formation of biofilms? Is it a natural phenomenon?

Yes Sandip. Corrosion is largely a biofilm-mediated process.

Corrosion is common in anaerobic environments - pipelines etc. Desulfovibrio spp. et al. in biofilm.

e.g. Article Microbial Influenced Corrosion: Understanding Bioadhesion an...

MIC (Microbiologically Influenced Corrosion) is a type of a corrosion which occurs due to the activity of Bacteria, Fungi, and Algae like microorganisms. There are several reasons for this. Biofilm formation, Oraginc acid, sulfides like microbial metabolites, Electrochemical reactions are main reasons.

Dear Phil and Nakandalage,

I was correct about this thinking that the corrosion causing bacteria need anaerobic environment for certain activities under which the biofilm formation is the main resultant outcome.

Thanks for your valuable feedback.

Sandip

Sandip Kuthe

To clarify, corrosion is best served within the context of an established biofilm

Thanks Phil

H2S formation takes place at the surface of the metal, where corrosion is ongoing and thus leading to increase in the corrosion process.

hi

why bacteria especially those reduces sulphates choose surface although it is a metal for the above transformation i.e. from SO4 to S(2-)? Is it because the electron transfer is easy to take place in the presence of metal? which is why we see a something like corrosion.

Microbiological influenced corrosion (MIC) has been reported to cause approximately 40% of all internal corrosion events in crude oil pipelines. This was reported previously in a decade back however the story continues and oil and gas industry still persists the use of biocides in something that could have its origin i.e. wet crude , the water content can be then the initial requirements of any further biociding.

Reservoir water treatment is costly and laborious that requires continuous efforts to combat future detrimental effects on the metal structures due to bacteria.

Maybe some biociding company expert shed light on this further.

Dears

We are closing down this discussion. Thanks to all.

Best Regards

Sandip