Biological corrosion which occurs in the presence living microorganisms and can be shown in oil and gas pipes and with soil. Please, I need the simplest method to test it?
You may find this article useful: Nnadi and Lizarazo-Marriaga ( 2013) 'Acid Corrosion of Plain and Reinforced Concrete Sewage Systems' Journal of materials in Civil Engineering
https://www.researchgate.net/publication/263045814_Acid_Corrosion_of_Plain_and_Reinforced_Concrete_Sewage_Systems
Article Acid Corrosion of Plain and Reinforced Concrete Sewage Systems
The simplest test would be to place a coupon of metal that is representative of the material used in the field in a solution that simulates that inside the pipe along with the bacteria and then maintain this at the appropriate temperature for a given length of time. You then simply measure the weight lost by the coupon.
Unfortunately, experience by gained by hundreds of researchers has been that attempting to simulate microbiologically induced corrosion in the lab cannot be done using "simple" means if you want the measured corrosion rate to accurately represent that the corrosion rates that are observed in the field. Any lab test requires approximations of different parameters in the field and this usually adds bias to the results. Sometimes these approximations are made to the corrosion side of the test and other times to the microbiology (such as inoculating with just a single strain of SRB and not all the other strains that would normally be required to form an active bacterial consortium).
So my overall answer is that a "simple" test can be developed to study a given aspect of MIC, but the results will not represent the conditions observed in the field unless you go to extreme measures in the design of your test system, such as building a large recirculating loop that used multiphase fluids and bacteria that were collected from the field and carefully preserved during transport.
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