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Zaštita materijala
2016, vol. 57, br. 2, str. 195-204
jezik rada: engleski
vrsta rada: pregledni članak
objavljeno: 25/06/2016
doi: 10.5937/ZasMat1602195J
Razvijanje efikasne metode zaštite cevovovoda od unutrašnje korozije u prisustvu CO2
aUniverzitet u Beogradu, Tehnološko-metalurški fakultet
bInstitute for Corrosion and Multiphase Technology, Ohio University, OH, USA
cConocoPhillips Company, Bartlesville, OK, USA

e-adresa: vesna@tmf.bg.ac.rs

Projekat

Sinteza, razvoj tehnologija dobijanja i primena nanostrukturnih multifunkcionalnih materijala definisanih svojstava (MPNTR - 45019)

Sažetak

U ovom radu je dat pregled dosadašnjih rezultata razvijanja efikasne metode zaštite cevovoda od unutrašnje korozije u prisustvu CO2. Efikasnost organskog inhibitora, imidazolinskog derivata smeše viših masnih kiselina i dietilentriamina, TOFA/DETA imidazolina za zaštitu niskougljeničnog čelika API X65 od korozije u 3 mas. % NaCl rastvoru zasićenom sa CO2 ispitivan je primenom metode linearne polarizacione otpornosti, metode polarizacione krive, metode određivanja gubitka mase na osnovu električne otpornosti, metode mikroskopije atomskih sila. Nova metoda zaštite od korozije u uslovima kondenzacije je ispitivana u staklenoj ćeliji kao i u sistemu sa višefaznim tokom fluida, posebno konstruisanom za ispitivanje uticaja operativnih parametara na koroziju čelika u uslovima kondenzacije. Na osnovu dobijenih rezultata merenja vršenih u tečnoj fazi potvrđeno je da je inhibitor TOFA/DETA imidazolin dobar i efikasan inhibitor za koroziju niskougljeničnog čelika u rastvoru 3 mas. % NaCl zasićenom sa CO2 uz izmerenu vrednost efikasnosti inhibicije preko 92%. Pena sa TOFA/DETA imidazolinom efikasno smanjuje brzinu korozije čelika u gasovitoj fazi uz efikasnost inhibicije od oko 90 % i vreme trajanja izvedene zaštite od korozije do 50 h.

Ključne reči

niskougljenični čelik; CO2 korozija; inhibitori korozije; metode linearne polarizacione otpornosti; metoda polarizacione krive; mikroskopija atomskih sila; sistem za merenje brzine korozije u uslovima kondenzacije

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