SYNTHESIS AND CHARACTERIZATION OF POLYASPARTIC COPOLYMER LEUCINE AS CORROSION INHIBITOR OF CARBON STEEL IN 1% NACL SOLUTION
On the past few years, there were many researches about polymeric based corrosion inhibitor and <br /> <br /> amino acid. Heteroatom polymer have big molecular structure so they have grouup which can be act <br /> <br /> as an chelating agent and covering wider metal surface....
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/30376 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | On the past few years, there were many researches about polymeric based corrosion inhibitor and <br />
<br />
amino acid. Heteroatom polymer have big molecular structure so they have grouup which can be act <br />
<br />
as an chelating agent and covering wider metal surface. Polyaspartic acid is one of water soluble <br />
<br />
polymeric group and have several characteristic such as chelating effect, functional polymer and eco <br />
<br />
friendly. Leucine is one of amino acid which can be act as a green corrosion inhibitor. Merging of <br />
<br />
those two compounds expect results a corrosion inhibitor which is relatively cheap, eco-friendly, <br />
<br />
biodegradable and have a better inhibition. Leucine is one of amino acid that have electron donor <br />
<br />
group which can interact with metal surface. In this research, polysuccinimide synthesized with leucin <br />
<br />
to produce Polyaspartic copolymer leucine (PASP-Leu).Synthesizing PSI with leucine expetected to <br />
<br />
increase the inhibition ability from those compounds. PASP-Leu compound characterized by FTIR <br />
<br />
and NMR Emersion of vibration on wavelength 2130 cm-1and the loss of peak 1700 cm-1on spectrum <br />
<br />
PSI pointing out the success of synthesizing PASP-Leu. Corrosion inhibition test of PASP-Leu <br />
<br />
compund and its precursor toward carbon steel on environment of saturated 1% NaCl on temperature <br />
<br />
25, 35, 45, 55 have been done using Electrochemical Impedance Spectroscopy, Tafel, weight loss <br />
<br />
method.Test using EIS produce maximum inhibiton on 45 in the amount of 49,44% on <br />
<br />
concentrarion 175 ppm.Tafel method produce eficeience in the amount of 29,33% and pointing out as <br />
<br />
anodic inhibitor.Weight loss method produce eficience in theamount of 65,56%. |
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