Inhibitivni efekat magnetnog polja na koroziju mekog čelika u kiselom mediju
DOI:
https://doi.org/10.5937/zasmat2301030OKljučne reči:
meki čelik, magnetno polje, gravimetrijska tehnika, brzina korozije, efikasnost zaštite, magnetootpornostApstrakt
Inhibitivni efekat primenjenih magnetnih polja na koroziju mekog čelika u 1.0 M HCl i 0.5 M H2SO4 kiselinskim rastvorima ispitan je na sobnoj temperaturi gravimetrijskom tehnikom. Lokalno napravljen elektromagnet sa promenljivim izlazima i napajan iz izvora jednosmerne struje obezbeđivao je magnetna polja. U tipičnom eksperimentu, korišćeno magnetno polje je primenjeno okomito na površinu kupona od mekog čelika koji je u potpunosti uronjen u izabrani rastvor kiseline tokom vremena izlaganja od dva sata. Uočeno je da se brzine korozije mekog čelika određene za svaki slučaj testnih rastvora od 1.0 M HCl i 0.5 M H2SO4 smanjuju kako se primenjeno magnetno polje povećava. Ovo ukazuje da prisustvo primenjenog magnetnog polja inhibira koroziju mekog čelika u ispitivanim rastvorima. Rezultati, takođe, pokazuju da se efikasnost zaštite magnetnog polja povećava kako se primenjeno magnetno polje povećava. ačnije, kako je magnetno polje povećano sa 118,2 - 764,3 mG [ili 0,01182 - 0,07643 mT], efikasnost zaštite je porasla sa 36,34 - 62,67% za meki čelik u 1.0 M rastvoru HCl kiseline, dok je za meki čelik u kiselini 0.5M H2SO4 efikasnost zaštite povećana sa 12,68 - 46,88%. Pokazano je da se uočeni inhibicijski efekat magnetnih polja može delom pripisati fenomenu poprečne magnetootpornosti, a delom uticaju magnetnih polja na svojstva transporta mase konstitutivnih jona u elektrohemijskom sistemu.Reference
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