Inhibition of corrosion of L 80 alloy in sodium hydroxide solution (pH=12) by succinic acid

Anitha Nilavan; Susai Rajendran

doi:10.5937/zasmat2301078K

Autori

Anitha Nilavan St Antony's College of Arts and Sciences for Women, Department of Chemistry, Corrosion Research Centre, Dindigul, India Autor
Susai Rajendran St Antony's College of Arts and Sciences for Women, Department of Chemistry, Corrosion Research Centre, Dindigul, India + Pondicherry University, Centre for Nanoscience and Technology, Puducherry, India Autor

DOI:

https://doi.org/10.5937/zasmat2301078K

Ključne reči:

inhibicija korozije, legura L80, rastvor natrijum hidroksida, elektrohemijska ispitivanja, ćilibarna kiselina

Apstrakt

Inhibicija korozije legure L80 u rastvoru natrijum hidroksida (pH=12) ćilibarnom kiselinom je procenjena elektrohemijskim studijama kao što su spektri polarizacije i AC impedanse. Studija otkriva da je ćilibarna kiselina u stanju da kontroliše koroziju legure L80 u rastvoru NaOH (pH = 12). Kada se legura L80 potopi u rastvor NaOH, otpor linearne polarizacije (LPR) se povećava, a struja korozije (Icorr) opada, što je otkriveno istraživanjem potenciodinamičke polarizacije. Ćilibarna kiselina pri pH=12 funkcioniše kao anodni tip inhibitora. Kada se legura L 80 potopi u rastvor NaOH, otpor prenosa naelektrisanja (Rt) se povećava, impedansa raste, fazni ugao se povećava i vrednos11t kapacitivnosti dvoslojnog sloja (Cdl) opada. Ovi rezultati sugerišu da se na površini metala formira zaštitni film i verovatno se zaštitni film sastoji od Fe 2+ -inhibitornog kompleksa.

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