Kitosan Larut Air dari Limbah Cangkang Udang dan Kerang sebagai Inhibitor Korosi pada Tinplate dalam Larutan NaCl 2%

Sakinah, Arina Hidayatus (2017) Kitosan Larut Air dari Limbah Cangkang Udang dan Kerang sebagai Inhibitor Korosi pada Tinplate dalam Larutan NaCl 2%. Undergraduate thesis, Institute Technology of Sepuluh Nopember.

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Abstract

Kitosan larut air (Water-Soluble Chitosan/ WSC) telah disintesis dari limbah cangkang udang vaname dan cangkang kerang kampak kemudian dimanfaatkan sebagai inhibitor korosi pada tinplate dalam larutan NaCl 2%. Kitin diperoleh dari reaksi demineralisasi dan deproteinisasi cangkang udang dan cangkang kerang. Kitin dideasetilasi menjadi kitosan kasar. WSC diperoleh dari reaksi pemotongan rantai kitosan kasar dengan H2O2. WSC dikarakterisasi dengan FTIR. Kinerja WSC dalam menghambat korosi pada tinplate dalam larutan NaCl 2% telah dipelajari dengan metode pengurangan berat dan polarisasi potensiodinamik. Studi efisiensi inhibisi WSC dilakukan pada variasi konsentrasi 10-1500 mg/L. Hasil yang diperoleh menunjukkan efisiensi inhibisi WSC meningkat terhadap konsentrasi WSC dan mencapai efisiensi maksimum pada konsentrasi 1300 mg/L dan mengalami penurunan pada konsentrasi 1500 mg/L. Efisiensi inhibisi maksimum WSC dari cangkang udang vaname diperoleh sebesar 72,73% (metode pengurangan berat) dan sebesar 91,41% (metode polarisasi potensiodinamik), sedangkan untuk WSC dari cangkang kerang kampak diperoleh sebesar 54,55% (metode pengurangan berat). Intepretasi hasil pengukuran dengan polarisasi potensiodinamik menunjukkan bahwa WSC merupakan inhibitor tipe campuran. Isotermal adsorpsi WSC pada permukaan tinplate dalam larutan NaCl 2% mengikuti isotermal adsorpsi Freundlich. ====================================================================================== Water-Soluble Chitosan (WSC) was synthesized from shrimp and mussel shells wastes and used as corrosion inhibitor on tinplate in NaCl 2% solution. Chitin was extracted from shrimp and mussel shells wastes by demineralization and deproteinization reaction. Chitin was deacetylated become crude chitosan. WSC was obtained by shortening the polymer chain of crude chitosan using H2O2. WSC was characterized by FTIR. Performance of WSC as corrosion inhibitor on tinplate in NaCl 2% solution was studied by weightloss and potentiodynamic polarization methods. Inhibition efficiency was studied at various concentration of inhibitor from 10 to 1500 mg/L. The inhibition efficiency increased with the increasing WSC concentration and reached maximum at 1300 mg/L and decreased at concentration 1500 mg/L. Maximum inhibition efficiency of WSC from shrimp shells waste were 72,72% (weightloss method) and 91,41% (potentiodynamic polarization method), while maximum inhibition efficiency of WSC from mussel shells waste was 54,55% (weightloss method). Polarization studies revealed that WSC acted as mixed type inhibitor. WSC isothermal adsorpstion on tinplate in NaCl 2% solution obeys Freundlich isoterm.

Item Type: Thesis (Undergraduate)
Additional Information: RSKi 620.112 23 Sak k
Uncontrolled Keywords: Tinplate, inhibitor korosi, kitosan larut air, weightloss, polarisasi potensodinamik,Tinplate, corrosion inhibitor, Water-Soluble Chitosan (WSC), weightloss, potentiodynamic polarization
Subjects: Q Science
Q Science > QD Chemistry
Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions: Faculty of Mathematics and Science > Chemistry > (S1) Undergraduate Theses
Depositing User: Sakinah Arina Hidayatus
Date Deposited: 19 Oct 2017 03:48
Last Modified: 06 Mar 2019 06:22
URI: http://repository.its.ac.id/id/eprint/44975

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