Copper corrosion inhibition by fast green, fuchsin acid and basic compounds in citric acid solution
✍ Scribed by E. Cano; P. Pinilla; J. L. Polo; J. M. Bastidas
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- German
- Weight
- 292 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0947-5117
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Fast green (FG), fuchsin basic (FB) and fuchsin acid (FA) were studied as copper corrosion inhibitors in citric acid solution. Five citric acid concentrations were tested from 0.001 to 1.0 M. Twelve FG, FB and FA concentrations were studied from 1 × 10^−5^ to 1 × 10^−1^ M, at four temperatures from 298 to 328 K. The gravimetric method was employed to study the protective effect of FG, FB and FA. The order of inhibition efficiency was FB > FA > FG. Conventional adsorption isotherms were tested to fit the experimental data. The best fit was obtained using the Frumkin isotherm model. A thermodynamic/kinetic model of adsorption was also fitted. The projected molecular area of the inhibitors was calculated to elucidate inhibitor orientation in the adsorption process.