L-CITRULLINE SEBAGAI INHIBITOR KOROSI PADA TINPLATE DALAM MEDIA NaCl

Zilfirdausi Ahla Zakaria, Harmami - -, Ita - Ulfin
Submission Date: 2016-01-29 10:54:30
Accepted Date: 2016-04-28 10:46:37

Abstract


L-citrulline sebagai inhibitor korosi pada tinplate dalam media NaCl telah diteliti menggunakan metode polarisasi potensiodinamik dan pengurangan berat. Pada penelitian ini dilakukan variasi konsentrasi L-citrulline dan media korosi NaCl. Hasil penelitian menunjukkan bahwa dalam media 2% NaCl, L-citrulline dapat meningkatkan efisiensi inhibisi korosi seiring dengan meningkatnya konsentrasi L-citrulline berturut-turut yaitu sebesar 36% dan 74,59 % pada metode pengurangan berat dan polarisasi potensiodinamik. Pengaruh konsentrasi NaCl terhadap efisiensi inhibisi L-citrulline pada tinplate yaitu dapat meningkatkan densitas arus korosi tinplate dan menurunkan efisiensi inhibisi L-citrulline dalam media 3% NaCl daripada dalam media 2% NaCl. Prosentase efisiensi inhibisi L-Citrulline pada tinplate dalam media 2% NaCl sebesar 74,59% dan dalam media 3% NaCl sebesar 68,96%. Adsorpsi L-citrulline pada permukaan tinplate mengikuti mekanisme adsorpsi isoterm Freundlich dengan nilai Kads dan ∆Gads berturut-turut sebesar 0,9835 dan -23,31 kJmol-1. L-citrulline menunjukkan mekanisme adsorpsi secara kimia (kemisorpsi) dengan tinplate.

Keywords


Inhibitor; korosi; L-citrulline; NaCl; tinplate

References


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