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| Titel: |
Inhibitive Effect of Some Pyrimidine Derivatives on the Cyclic Stressed Specimens of Stainless Steel Type 304 in Acidic Media |
| Auteur: |
A.S. Fouda and H. El-Dafrawy |
| Verschenen in: |
International journal of electrochemical science |
| Paginering: | Jaargang 2 (2007) nr. 9 pagina's 721-733 |
| Jaar: |
2007 |
| Inhoud: |
The inhibiting effect of different concentrations some pyrimidine derivatives on the cyclic stressed specimens in 0.1 M HCl at 30oC was studied using galvanostatic polarization technique. Some quantum – chemical quantities were calculated. The inhibition efficiencies of these compounds on the uniform corrosion was evaluated by recording anodic and cathodic polarization curves of the electrode in the aggressive media. The examined compounds exerted an inhibiting action towards the general corrosion, ranging between 22% to 85%, but the % inhibition efficiency (%IE) for cyclic stressed specimens ranging between 3% to 34%. Polarization studies revealed that these compounds behave as mixed type inhibitors and inhibit corrosion by parallel adsorption on the surface of stainless steel due to the presence of more than one adsorption active centre in the inhibitor molecule. The adsorption is obeyed Langmuir adsorption isotherm. The inhibitor efficiency increases with increasing the concentration of inhibitor and decreasing with increasing the cyclic stress and temperature. |
| Uitgever: |
Electrochemical Science Group |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 6 gevonden artikelen
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