Murulana, L. C.Mnyakeni - Moleele, S. S.Tshikhudo, Fulufhelo2021-06-302021-06-302021-06-23Tshikhudo, F. (2021) Investigation of substituted thiazolidinediones as corrosion inhibitors on different metals in acidic media. University of Venda, South Africa.<http://hdl.handle.net/11602/1712>http://hdl.handle.net/11602/1712MSc (Chemistry)Department of ChemistryThis study is based on the synthesis of four Thiazolidinediones (TZD) derivatives which are Ethyl 2-(5-(4-methoxybenzylidene)-2,4-dioxothiazolidin-3-yl)acetate (EMDA), Ethyl 2-(5-(Benzo[d][1.3]dioxol-5ylmethylene)-2,4dioxothiazolidin-3-yl)acetate (EBMDA), Ethyl 2-(5-(substituted benzylidene)-2,4-dioxothiazolidin-3-yl) acetates (EBDA) and Ethyl 2-(2-(5-(Benzo[d][1.3]dioxol-5-ylmethylene)-2,4-dioxothiazolidin-3-yl)acetamido)glycinate (EBDMDG) as corrosion inhibitors for two different metals (zinc and aluminium) in 1.5M hydrochloric acid solution at various temperatures. The corrosion inhibition characteristics including corrosion inhibition efficiencies and inhibitor-metal adsorption/desorption behaviour were studied using electrochemical impedance spectroscopy, potentiodynamic polarization, and gravimetric analysis. The results obtained from the gravimetric analysis indicate that the corrosion inhibition efficiency of zinc and aluminium metal in an acidic environment increased with an increase in the concentration of the inhibitors. The inhibition efficiency of EBMDA, EBDA, and EBDMDG inhibitors for zinc metal is directly proportional to temperature whereas inhibition efficiency for aluminium metal is inversely proportional. The inhibition efficiency of EMDA inhibitor for zinc is inversely proportional to temperature and directly proportional to temperature for aluminium metal. Both inhibitors obeyed Langmuir adsorption. Electrochemical studies have been carried out using PDP and EIS. PDP was used to obtain corrosion parameters while EIS was applied to determine the charge transfer during corrosion. The result indicates that all four compounds are mixed type inhibitors also when the concentration of inhibitor increase the charge transfer resistance during corrosion increased.1 online resource (xv, 125 leaves) : color illustrationsenUniversity of VendaThiazolidinedioneUCTDCorrosion inhibition efficiencyElectrochemical577.27520968257Metals -- South Africa -- LimpopoZink -- South Africa -- LimpopoAcid deposit -- South Africa -- LimpopoEnvironmental toxicology -- South Africa -- LimpopoDissertationTshikhudo F. Investigation of substituted thiazolidinediones as corrosion inhibitors on different metals in acidic media. []. , 2021 [cited yyyy month dd]. Available from: http://hdl.handle.net/11602/1712Tshikhudo, F. (2021). <i>Investigation of substituted thiazolidinediones as corrosion inhibitors on different metals in acidic media</i>. (). . Retrieved from http://hdl.handle.net/11602/1712Tshikhudo, Fulufhelo. <i>"Investigation of substituted thiazolidinediones as corrosion inhibitors on different metals in acidic media."</i> ., , 2021. http://hdl.handle.net/11602/1712TY - Dissertation AU - Tshikhudo, Fulufhelo AB - This study is based on the synthesis of four Thiazolidinediones (TZD) derivatives which are Ethyl 2-(5-(4-methoxybenzylidene)-2,4-dioxothiazolidin-3-yl)acetate (EMDA), Ethyl 2-(5-(Benzo[d][1.3]dioxol-5ylmethylene)-2,4dioxothiazolidin-3-yl)acetate (EBMDA), Ethyl 2-(5-(substituted benzylidene)-2,4-dioxothiazolidin-3-yl) acetates (EBDA) and Ethyl 2-(2-(5-(Benzo[d][1.3]dioxol-5-ylmethylene)-2,4-dioxothiazolidin-3-yl)acetamido)glycinate (EBDMDG) as corrosion inhibitors for two different metals (zinc and aluminium) in 1.5M hydrochloric acid solution at various temperatures. The corrosion inhibition characteristics including corrosion inhibition efficiencies and inhibitor-metal adsorption/desorption behaviour were studied using electrochemical impedance spectroscopy, potentiodynamic polarization, and gravimetric analysis. The results obtained from the gravimetric analysis indicate that the corrosion inhibition efficiency of zinc and aluminium metal in an acidic environment increased with an increase in the concentration of the inhibitors. The inhibition efficiency of EBMDA, EBDA, and EBDMDG inhibitors for zinc metal is directly proportional to temperature whereas inhibition efficiency for aluminium metal is inversely proportional. The inhibition efficiency of EMDA inhibitor for zinc is inversely proportional to temperature and directly proportional to temperature for aluminium metal. Both inhibitors obeyed Langmuir adsorption. Electrochemical studies have been carried out using PDP and EIS. PDP was used to obtain corrosion parameters while EIS was applied to determine the charge transfer during corrosion. The result indicates that all four compounds are mixed type inhibitors also when the concentration of inhibitor increase the charge transfer resistance during corrosion increased. DA - 2021-06-23 DB - ResearchSpace DP - Univen KW - Thiazolidinedione KW - Corrosion inhibition efficiency KW - Electrochemical LK - https://univendspace.univen.ac.za PY - 2021 T1 - Investigation of substituted thiazolidinediones as corrosion inhibitors on different metals in acidic media TI - Investigation of substituted thiazolidinediones as corrosion inhibitors on different metals in acidic media UR - http://hdl.handle.net/11602/1712 ER -