THE EFFECTIVENESS OF WATERMELON RIND EXTRACT AS CORROSION INHIBITOR IN STAINLESS STEEL ORTHODONTIC WIRE
DOI:
https://doi.org/10.22159/ijap.2019.v11s4.35283Keywords:
Corrosion, Orthodontic, wire, Watermelon rindAbstract
Objective: To determine the effectiveness of watermelon rind extract as corrosion inhibitor in stainless steel orthodontic wire.
Methods: This research was a laboratory experimental research with post-test control group design. Samples used in this experiment were 40 pieces of stainless steel orthodontic wire that were divided equally into four groups with artificial saliva as the medium, one control group without extract addition, and three treatment groups with various concentrations of watermelon rind extract, namely 200 ppm, 600 ppm and 1000 ppm. Measurement of the corrosion rate was carried out by using an eDAQ potentiostat and the result of data analysis were presented in tables and diagrams.
Results: The highest corrosion rate occurred in control group, while in treatment groups the corrosion rate decreased significantly, with inhibitor effectiveness raised along with the increasing concentration. The most effective concentration was 1000 ppm with inhibitor effectiveness value of 46.12%.
Conclusion: Watermelon rind has the inhibiting effect on stainless steel orthodontic wire’s corrosion rate.
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