Protection of carbon steel against corrosion with a superhydrophobic coating

Olga Alekhina; Natalia Shel

doi:10.5937/zasmat2303283T

Autori

Olga Alekhina Derzhavin State University, Tambov, Russian Federation Autor
Natalia Shel Tambov State Technical University, Tambov, Russian Federation Autor

DOI:

https://doi.org/10.5937/zasmat2303283T

Ključne reči:

ugljenični čelik, korozija, zaštita, superhidrofobni premaz, kontaktni ugao, amonijak, ugljen-dioksid (IV), potenciodinamička polarizacija

Apstrakt

U atmosferskim uslovima pri 100% vlažnosti na površini metala se formira površinski fazni film vlage u kome se rastvore i skoro potpuno hidriraju vazdušne mikro nečisto e NH3, CO2, H2S itd. U atmosferskim uslovima pri 100% vlažnosti, na površini metala se formira površinski fazni film vlage u kome se nalaze mikro nečisto e vazduha NH3, CO2, H2S itd., koje se rastvore i skoro potpuno hidratizuju sa stvaranjem NH4OH i kiselina H2CO3 i H2S. Metoda potenciodinamičke polarizacije je korišćena za proučavanje zaštitne efikasnosti superhidrofobne prevlake na ugljeničnom čeliku u modelnom mediju na bazi NaCl koji simulira zasićenje filma površinske vlage ugljen-dioksidom (IV) i/ili amonijakom u atmosferskim uslovima. Superhidrofobni premaz je dobijen na osnovu laserskog teksturiranja čelične površine pra ene hidrofobizacijom fluoroksisilanom (ugao vlaženja 165±2°, ugao kotrljanja 3±1°). Razmatran je uticaj trajanja izlaganja elektroda u rastvoru (0,25 - 168 h) na kinetiku elektrodnih procesa, brzinu korozije čelika i zaštitnu efikasnost superhidrofobnog premaza. Pokazalo se da prisustvo amonijum hidroksida ili amonijumkarbonata u rastvoru povećava zaštitnu efikasnost premaza u poređenju sa čisto hloridnim medijumom koji simulira oštre atmosferske uslove.

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