Effects of Desulfotomaculum sp on corrosion behaviour of mild steel and aluminium in sea water

Peter James Misoni; Chinedu Emeka Ihejirika

doi:10.5937/zasmat2302190I

Autori

Peter James Misoni Federal University of Technology, Department of Microbiology, Owerri, Nigeria Autor
Chinedu Emeka Ihejirika Federal University of Technology, Department of Environmental Management, Owerri, Nigeria Autor

DOI:

https://doi.org/10.5937/zasmat2302190I

Ključne reči:

mikrobiološki uticaja na koroziju, stopu korozije, potencijal elektroda, SRB, pasivnost, metal

Apstrakt

Mikrobiološki uticaj na koroziju mekog čelika i aluminijuma u morskoj vodi (SV) prouzrokovane bakterijom za smanjenje sulfata (SRB ), istražena je Desulfotomaculum SP. Stope korozije procenjene su u intervalima od deset dana u periodu od šezdeset dana koriste i gravimetrijske i elektrohemijske metode. Rezultati su pokazali da se stopa korozije smanjila sa vremenom izlaganja nakon početnog povećanja. Plot potencijala elektroda (EP) sa vremenom izloženosti prikazuje smanjenje kao otpor porastao zbog korozije koji se formira na površini metala. Aluminijum je zabiležio maksimalnu redukciju EP (-0,85 MV) nakon 60 dana inkubacije, sa početnim potencijalom od -0,53 mV nakon 10 dana. to je više negativnije, to je veća tendencija da formiraju jone i samim tim da korodiraju. Prosečna stopa korozije mekog čelika i aluminijuma u medijima u prisustvu SRB-a bila je 4-puta više u poređenju na medije bez Desulfotomaculum Sp.

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