Inhibition of corrosion of SS 18/8 alloy is sea water by Thiourea-Zn2+ system

Susai Santhammal Rajendran; Thankappan Sasilatha; Antony John Amalraj

doi:10.5937/zasmat2103191J

Autori

Susai Santhammal Rajendran St. Antony's College of Arts and Sciences for Women, PG and Research Department of Chemistry, Corrosion Research Centre, Thamaraipady, Tamil Nadu, India Autor
Thankappan Sasilatha AMET University, Department of EEE, Chennai, India Autor
Antony John Amalraj EVR Government College, PG and Research Department of Chemistry, Trichy, India Autor

DOI:

https://doi.org/10.5937/zasmat2103191J

Ključne reči:

korozija morske vode, legirani cevovodi SS 18/8, legurne ploče trupa SS 18/8, sistem Thiourea-Zn2+, izoterma Langmuirove adsorpcije

Apstrakt

Procenjena je otpornost korozije SS 18/8 u prirodnoj morskoj vodi, u prisustvu inhibitora Thiourea-Zn2+ . Za procenu otpornosti na koroziju legure SS 18/8 u prirodnoj morskoj vodi, u prisustvu inhibitora Thiourea-Zn2+ korišćeni su metod gubitka težine, studija polarizacije i spektri AC impedanse. Metoda gubitka težine otkriva da Thiourea-Zn2+ sistem nudi maksimalnu efikasnost inhibicije korozije od 95% u kontroli korozije legure SS 18/8 u prirodnoj morskoj vodi. Utvrđeno je da su parametri sinergizma veći od 1, što potvrđuje sinergijski efekat koji postoji između Thiourea-Zn2+. Adsorpcija molekula inhibitora na površini metala podleže Langmuirovoj adsorpcionoj izotermi. Studija polarizacije otkriva da inhibitori Thiourea-Zn2+ sistem funkcionišu kao mešani tip inhibitora. Spektri AC impedanse potvrđuju stvaranje zaštitnog filma na metalnoj površini. Ova formulacija Thiourea-Zn2+ može se koristiti u sistemima za hlađenje vodom gde se legirani cevovodi SS 18/8 koriste za transport morske vode, koja se koristi kao rashladna tečnost. Takođe, premaz Thiourea-Zn2+ može se naneti na leguru SS 18/8 da bi se zaštitio od korozije morskom vodom kada se legura SS 18/8 koristi kao ploče trupa u brodskoj industriji.

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