1. Evaluation of anticorrosive effectiveness of thiosemicarbazones solubilized in a microemulsion system
- Author
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Elaine Cristina M. de Moura, Maria Aparecida Medeiros Maciel, Djalma Ribeiro da Silva, Aurea Echevarria, Myrtes S. S. Bellieny, Cátia Guaraciara Fernandes Teixeira Rossi, and Ádna Dornelles Nicácio de Souza
- Subjects
Carbon steel ,corrosion inhibitors ,Stereochemistry ,thiosemicarbazones ,General Chemistry ,engineering.material ,microemulsion ,lcsh:Chemistry ,chemistry.chemical_compound ,Pulmonary surfactant ,chemistry ,lcsh:QD1-999 ,Solubilization ,engineering ,Microemulsion ,Semicarbazone ,Nuclear chemistry - Abstract
In this paper, thiosemicarbazones 4-N-cinnamoyl-thiosemicarbazone (CTSC), 4-N-(2'-methoxycinnamoyl)-thiosemicarbazone (MCTSC), and 4-N-(4'-hydroxy-3'-methoxybenzoyl)- thiosemicarbazone (HMBTSC) were solubilized in an oil-in-water (O/W) microemulsion system (ME_OCS), forming systems CTSC_ME_OCS, MCTSC_ME_OCS and HMBTSC_ME_OCS. The effectiveness of these systems in the process of inhibiting AISI 1020 carbon steel corrosion was evaluated in a saline solution (NaCl 0.5%), using a galvanostatic method. The tested thiosemicarbazones showed higher inhibitory effects (85.7% for CTSC_ME_OCS, 84.0% for MCTSC_ME_OCS, and 83.3% for HMBTSC_ME_OCS). The surfactant OCS (dissolved in H2O) and the ME_OCS system showed lower efficacies, with 71.0% for OCS and 74.0% for ME_OCS system.
- Published
- 2013