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Aster koraiensis as nontoxic corrosion inhibitor for mild steel in sulfuric acid
Mayakrishnan Prabakaran,김승현,Nithiyanandham Mugila,Venkatesan Hemapriya,Kandasamy Parameswari,Subramanian Chitra,정일민 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-
Inhibition efficiency of Aster koraiensis leaf extract toward corrosion of mild steel in 1 M H2SO4 solutionwas investigated using weight loss, electrochemical, FT-IR, SEM, and EDX methods The individualphenolic compounds present in A. koraiensis extract were identified. Maximum efficiency of 90.53% wasachieved at 2000 ppm of the extract. The corrosion kinetic parameters determined from the polarizationcurves indicated that the extract acted as a mixed-type inhibitor. Adsorption of the inhibitor on the mildsteel surface obeyed the Langmuir isotherm. SEM investigations confirmed the formation of inhibitionlayer unto the metal surface by compounds present in the extract.
<i>Aster koraiensis</i> as nontoxic corrosion inhibitor for mild steel in sulfuric acid
Prabakaran, Mayakrishnan,Kim, Seung-Hyun,Mugila, Nithiyanandham,Hemapriya, Venkatesan,Parameswari, Kandasamy,Chitra, Subramanian,Chung, Ill-Min Elsevier 2017 Journal of industrial and engineering chemistry Vol.52 No.-
<P><B>Abstract</B></P> <P>Inhibition efficiency of <I>Aster koraiensis</I> leaf extract toward corrosion of mild steel in 1M H<SUB>2</SUB>SO<SUB>4</SUB> solution was investigated using weight loss, electrochemical, FT-IR, SEM, and EDX methods The individual phenolic compounds present in <I>A. koraiensis</I> extract were identified. Maximum efficiency of 90.53% was achieved at 2000ppm of the extract. The corrosion kinetic parameters determined from the polarization curves indicated that the extract acted as a mixed-type inhibitor. Adsorption of the inhibitor on the mild steel surface obeyed the Langmuir isotherm. SEM investigations confirmed the formation of inhibition layer unto the metal surface by compounds present in the extract.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>Aster koraiensis</I> extract is a very eco-friendly corrosion inhibitor for mild steel. </LI> <LI> Adsorption of inhibitor by mild steel in 1M H<SUB>2</SUB>SO<SUB>4</SUB> obeys Langmuir isotherm model. </LI> <LI> SEM and EDX examination confirm adsorption of inhibitor unto metal surface. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>