THE INHIBITION AND ADSORPTION PROPERTIES OF DTPMP TSC ON STAINLESS STEEL IN ACIDIC MEDIUM
Journal Title: JOURNAL OF ADVANCES IN CHEMISTRY - Year 2013, Vol 6, Issue 1
Abstract
The inhibition effect of diethylenetriamine penta(methylene phosphonic acid) (DTPMP) and Trisodium Citrate (TSC) on thecorrosion behavior of stainless steel in 0.5 M H2SO4 solution was investigated by using weight loss method. The combinedcorrosion inhibition efficiency offered 200 ppm of DTPMP and 150 ppm of TSC was 95%. Polarization study showed thatthe inhibitors inhibit stainless steel corrosion through mixed mode and electrochemical impedance spectroscopy (EIS)results confirm the adsorption of the inhibitors at stainless steel/acid interface. The adsorption of DTPMP and TSC ontothe stainless steel surface was found to follow Langmuir adsorption isotherm modes. Negative values of (ΔGads) in theacid media ensured the spontaneity of the adsorption process. The nature of the protective film formed on the metalsurface has been analyzed by FTIR spectra, SEM and AFM analysis. The activation energy (Ea), free energy change(ΔGads), enthalpy change (ΔHads) and entropy change (ΔSads) were calculated to understand the corrosion inhibitionmechanism.
Authors and Affiliations
P. Selva kumar
Keywords
Related Articles
- EP ID EP652589
- DOI 10.24297/jac.v6i1.6588
- Views 124
- Downloads 0
Synthesis of 2, 3-Dihydro-1,4-naphthaquinone Derivatives for Targeting the Altered Cancer Cells Metabolism
A new four derivatives of 2,3-Dihydro-1,4-naphthaquinonewere synthesizedas possible bioreductiveprodrugs for5-fluorouracil (5-Fu),Mercaptopurine (6-MP), N-acetyl cysteine (NAC)and 3-bromopyrovic acid (3-BPA) to selective...
Metal containing composites based on styrene copolymers and butoxyl methyl methacrylate as a catalyst in the oxidation of the diesel fraction
The article presents the results of studies on the metal-based composites on the basis of copolymers and block copolymers of styrene with butoxymethyl methacrylate (BOMMA) as a catalyst in the oxidation process of naphth...
AN EFFICIENT SYNTHESIS OF GEM-DIHYDROPEROXIDES AND 1,2,4,5-TETRAOXANES CATALYZED BYCHLOROSULFONIC ACIDAS A NEW CATALYST
Chlorosulfonic acid was used as an active, low-cost and reusable solid catalyst for conversion of ketones and aldehydes to corresponding gem-dihydroperoxides using 30% aqueous hydrogen peroxide at room temperature. The r...
Leucine: green and efficient catalyst for the synthesis of 4H-chromenes
Leucine, a naturally occurring α-amino acid, has been found as an effective catalyst to effect the one-pot three-component condensation reaction between aromatic aldehydes, malononitrile and 5,5-dimethyl-1,3-cyclohexane...
Design and Development of Network Reliability based Secure Multicast Routing Protocol for MANET
In Mobile Ad hoc network (MANET), link quality and stability of links as well as nodes play a major role. In ad hoc network, links are often changing which could affect the node mobility and integrity of data packets. In...