Water-soluble chitosan from shrimp and mussel shells as corrosion inhibitor on tinplate in 2% NaCl

Harmami Harmami, Ita Ulfin, Arina Hidayatus Sakinah, Yatim Lailun Ni’mah


Water-Soluble Chitosan (WSC) was synthesized form shrimp and mussel shells wastes and used as corrosion inhibitor on tinplate in 2% NaCl. Chitin was extracted from shrimp and mussel shells wastes by demineralization and deproteinization reactions.Chitin was deacetylated to crude chitosan. WSC was obtained by shortening the crude chitosan polymer chain using H2O2. WSC was characterized by FTIR. WSC performance as corrosion inhibitor on tinplate in 2% NaCl was studied by weightloss and potentiodynamic polarization methods. WSC inhibition efficiency was studied in various concentrations from 10-1500 mg/L. Maximum inhibition efficiencies of WSC from shrimp shells waste were 72,73% (weightloss method) and 91,41% (potentiodynamic polarization method), while maximum inhibition efficiency of WSC from mussel shells waste was 54,55% (weightloss method) with the addition of 1300 mg/L WSC concentration. Weightloss studies revealed that WSC acted as mixed type of inhibitor and obeyed Freundlich adsorption isoterm.


Tinplate, corrosion inhibitor, water-soluble chitosan, weight loss, potentiodynamic polarization

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DOI: https://doi.org/10.11113/mjfas.v15n2.972


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