An investigation of some Schiff bases as corrosion inhibitors for austenitic chromium-nickel steel in H2SO4
JOURNAL OF APPLIED ELECTROCHEMISTRY, cilt.31, sa.1, ss.79-83, 2001 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 31 Sayı: 1
- Basım Tarihi: 2001
- Doi Numarası: 10.1023/a:1004182329826
- Dergi Adı: JOURNAL OF APPLIED ELECTROCHEMISTRY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.79-83
- Anahtar Kelimeler: corrosion, inhibitor, Schiff bases, steel, MILD-STEEL, SULFURIC-ACID, CARBON-STEEL, ADSORPTION, IRON, NACL
- Ankara Üniversitesi Adresli: Hayır
Özet
The corrosion inhibition of austenitic chromium-nickel steel by two Schiff bases, N-(1-toluidine)salicylaldimine and N-(2-hydroxyphenyl)salicylaldimine, was investigated in sulphuric acid medium. The effect of concentration and temperature on inhibition properties was determined. It was found that when the concentrations of inhibitor were increased the inhibition efficiencies (eta) and surface coverage (theta) increased. Some thermodynamic parameters such as free energy of adsorption, DeltaG(ads)degrees, and enthalpy, DeltaH, were determined for the Schiff bases. Experimental results agree with the Temkin isotherm for N-(1-toluidine)salicylaldimine, but the Langmuir isotherm is more appropriate for N-(2-hydroxyphenyl)salicylaldimine.