The Utilization of Extract Belimbing Wuluh Leaves (Averrhoa Bilimbi) as Natural Inhibitor Corrosion to Prevent Corrosion on Metal Mild Steel
Richki Agus Satryan1, Kiagus Ahmad Roni2, Heni Juniar3
1Richki Agus Satryan, Department of Chemical Engineering, Faculty of Engineering, Universities Muhammadiyah Palembang, Indonesia.
2Kiagus Ahmad Roni, Department of Chemical Engineering, Faculty of Engineering, Universitas Muhammadiyah Palembang, Indonesia.
3Heni Juniar, Department of Chemical Engineering, Faculty of Engineering, Universitas Muhammadiyah Palembang, Indonesia.
Manuscript received on 02 May 2019 | Revised Manuscript received on 14 May 2019 | Manuscript Published on 23 May 2019 | PP: 18-28 | Volume-7 Issue-6S5 April 2019 | Retrieval Number: F10040476S519/2019©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Corrosion is a gradual destruction of metal, which decrease the quality (degradation) of metal because of their reaction with environment by chemical or or electrochemical in usage time. Extract of belimbing wuluh leaves (Averrhoa Bilimbi) is an organic substances that can be used as a natural inhibitor because it contains tannin that reduce corrosion rate of mild steel in corrosive medium. Tannin in extract of belimbing wuluh leaves is analyzed with two phase, first is qualitative analyze (discoloration from brown to green) and second is quantitative analyze and obtained the tannin level is 0.3924%. Weight loss method is used to test the effectiveness of extract belimbing wuluh leavesas an inhibitor on metal mild steel sized 4 cm x 2,1 cm x 0,2 cm with various of corrosive medium (such as rain water, swamp water, and river water) and corrosion rate test (1 week, 2 weeks, 3 weeks, 4 weeks and 5 weeks). The result of research showed that usage of extract belimbing wuluh leaves as natural inhibitor is more effective in rain water corrosive environment with corrosion rate test in 5 weeks with efficiency 91%.
Keywords: Belimbing Wuluh Leaves, Tannin, Natural Corro Sion Inhibitor, Corrosion, Mild Steel.
Scope of the Article: Metallurgy