Evaluation of anticorrosive effectiveness of thiosemicarbazones solubilized in a microemulsion system

Quimica nova

Bellieny, Myrtes S. S.¹  Echevarria, Aurea¹  Rossi, Cátia Guaraciara F. T.²  Maciel, Maria Aparecida M.²  Silva, Djalma R. da²  Moura, Elaine Cristina M. de²  Souza, Adna Dornelles N.² 

[1]Universidade Federal Rural do Rio de Janeiro, Seropédica, Brasi

[2]Universidade Federal do Rio Grande do Norte, Natal, Brasil

关键词: thiosemicarbazones;    microemulsion;    corrosion inhibitors.;   

DOI  :  10.1590/S0100-40422013000100011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

CC BY