Estudo comparativo da eficiência da difenilcarbazida e do óleo de coco saponificado microemulsionados na inibição da corrosão de aço carbono
| Autor: | Rossi, Cátia G. F. T., Scatena Jr, Hélio, Maciel, Maria Aparecida M., Dantas, Tereza N. C. |
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| Jazyk: | portugalština |
| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Química Nova v.30 n.5 2007 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Volume: 30, Issue: 5, Pages: 1128-1132, Published: OCT 2007 |
| Popis: | The effectiveness of microemulsions (ME) of saponified coconut oil (OCS-ME) and diphenylcarbazide (DC-ME) on a carbon steel corrosion inhibition process was evaluated using an electrochemical method of polarization resistance. The ME was prepared with OCS, butanol, kerosene and saline solutions. OCS-ME and DC-ME showed highest inhibitions effects (77% and 92%, respectively) at lower concentrations (0.5% and 0.48 - 0.50%, respectively). The surfactant OCS (in H2O) showed lower efficiency (63% at 0.20 - 0.25% concentration). The greatest inhibitory effect of DC-ME could be correlated with the chemical structure and the rich O/W ME system, which are very important for adsorption phenomena in interfacial ME systems. |
| Databáze: | OpenAIRE |
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