INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES
The infuence of some arylazo indole derivatives on the corrosion rate of 70/30 a-brass in 2 mol 1-1 HNO3 was investigated using weight loss and galvanostatic polarization techniques. It was found that the investigated compounds behave as inhibitors. The inhibition effciency increases with increasing...
Guardado en:
| Autores principales: | , |
|---|---|
| Lenguaje: | English |
| Publicado: |
Sociedad Chilena de Química
2009
|
| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000400019 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:scielo:S0717-97072009000400019 |
|---|---|
| record_format |
dspace |
| spelling |
oai:scielo:S0717-970720090004000192010-04-15INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVESFOUDA,A. SMAHFOUZ,H corrosion inhibition a-brass synergistic effect HNO3 arylazo indole derivatives The infuence of some arylazo indole derivatives on the corrosion rate of 70/30 a-brass in 2 mol 1-1 HNO3 was investigated using weight loss and galvanostatic polarization techniques. It was found that the investigated compounds behave as inhibitors. The inhibition effciency increases with increasing the inhibitor concentration, but decreases with increasing the temperature. The adsorption of these compounds on the a-brass surface follows a Frumkins adsorption isotherm. The electrochemical results indicated that all the investigated compounds act as mixed-type inhibitors. The infuence of the substituent group on the inhibition effciency of the inhibitor was explained in terms of the density of the electron cloud on arylazo indole moiety. Some thermodynamic parameters for corrosion and adsorption processes were determined and discussed.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.54 n.4 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000400019en10.4067/S0717-97072009000400019 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
corrosion inhibition a-brass synergistic effect HNO3 arylazo indole derivatives |
| spellingShingle |
corrosion inhibition a-brass synergistic effect HNO3 arylazo indole derivatives FOUDA,A. S MAHFOUZ,H INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES |
| description |
The infuence of some arylazo indole derivatives on the corrosion rate of 70/30 a-brass in 2 mol 1-1 HNO3 was investigated using weight loss and galvanostatic polarization techniques. It was found that the investigated compounds behave as inhibitors. The inhibition effciency increases with increasing the inhibitor concentration, but decreases with increasing the temperature. The adsorption of these compounds on the a-brass surface follows a Frumkins adsorption isotherm. The electrochemical results indicated that all the investigated compounds act as mixed-type inhibitors. The infuence of the substituent group on the inhibition effciency of the inhibitor was explained in terms of the density of the electron cloud on arylazo indole moiety. Some thermodynamic parameters for corrosion and adsorption processes were determined and discussed. |
| author |
FOUDA,A. S MAHFOUZ,H |
| author_facet |
FOUDA,A. S MAHFOUZ,H |
| author_sort |
FOUDA,A. S |
| title |
INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES |
| title_short |
INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES |
| title_full |
INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES |
| title_fullStr |
INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES |
| title_full_unstemmed |
INHIBITION OF CORROSION OF Α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES |
| title_sort |
inhibition of corrosion of Α-brass (cu-zn, 67/33) in hno3 solutions by some arylazo indole derivatives |
| publisher |
Sociedad Chilena de Química |
| publishDate |
2009 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000400019 |
| work_keys_str_mv |
AT foudaas inhibitionofcorrosionof913brasscuzn6733inhno3solutionsbysomearylazoindolederivatives AT mahfouzh inhibitionofcorrosionof913brasscuzn6733inhno3solutionsbysomearylazoindolederivatives |
| _version_ |
1718445414058819584 |