The corrosion inhibition of commercial copper by means of isatin was studied in aerated 0.5 M H 2SO 4 in the temperature range 25–55 °C using weight-loss, potentiodynamic and spectrophotometric tests, and determination of double layer capacitance. Inhibition efficiencies up to 94% in the concentration range of 1×10 −4–7.5×10 −3 M of isatin were obtained. The corrosion rates estimated with weight-loss measurements were higher than those correspondingly determined with the potentiodynamic test, especially at higher concentrations of inhibitor. This is in accord with other researches that have pointed out the limitation of the Tafel line extrapolation method in the determination of corrosion rates.

Politecnico di Milano Dipartimento di Chimica, Materiali e Ingegneria Chimica, “G. Download Death Note English Sub Mp4. Iinterf increases as electric field gradient ∇E increases and environment resistivity ρ decreases.5 V CSE[15] Five cases of AC corrosion in North America were reported. Pedeferri: Corrosione e protezione dei materiali metallici.

The kinetics of cuprous and cupric ion formation and UV–visible spectra support the formation hypothesis of a complex between copper and isatin. Naruto Shippuden 309 Mp4 Mf here. The adsorptive behaviour of isatin on copper 0.5 M H 2SO 4 was also investigated. • Previous article in issue • Next article in issue.