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Zaštita materijala
2016, vol. 57, br. 2, str. 205-211
jezik rada: engleski
vrsta rada: pregledni članak
doi:10.5937/ZasMat1602205J


Hemijska korozija metala i legura
Univerzitet u Beogradu, Institut za hemiju, tehnologiju i metalurgiju - IHTM, Beograd

e-adresa: borejegdic@yahoo.com

Projekat

Sinteza, razvoj tehnologija dobijanja i primena nanostrukturnih multifunkcionalnih materijala definisanih svojstava (MPNTR - 45019)
Razvoj triboloških mikro/nano dvokomponentnih i hibridnih samopodmazujućih kompozita (MPNTR - 35021)

Sažetak

U ovom preglednom radu analizirana je hemijska korozija metala i legura u rastvorima elektrolita. Pokazano je da se gvožđe, hrom i neki drugi metali i legure rastvaraju mnogo brže nego što je njihova brzina korozije određena elektrohemijskim metodama. To znači da se istovremeno sa elektrohemijskim rastvaranjem odvija i hemijsko rastvaranje, koje ne zavisi od potencijala. U nekim uslovima hemijsko rastvaranje metala je dominantan proces rastvaranja. Opisano je više mehanizama hemijske korozije. Takođe, razmatrane su posledice hemijskog rastvaranja različitih metala i legura, kao i pojava izdvajanja vodonika pri hemijskom rastvaranju. Proces izdvajanja vodonika pri hemijskoj koroziji ne podleže zakonitostima elektrohemijske kinetike.

Ključne reči

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