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All Journal CHEMPUBLISH JOURNAL Hydrogen: Jurnal Kependidikan Kimia Journal of The Indonesian Society of Integrated Chemistry
Putri, Sanaq Elfira
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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Inhibisi Korosi Baja Lunak dengan Ekstrak Daun Miana (Coleus scutellaroides (L.) Benth.) dalam Medium HCl Putri, Sanaq Elfira; Gusniardi, Vira Anggita; Suryati, Suryati; Emriadi, Emriadi
Journal of The Indonesian Society of Integrated Chemistry Vol. 15 No. 2 (2023): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v15i2.29253

Abstract

[Corrosion Inhibition of Mild Steel with Miana (Coleus scutellaroides (L.) Benth.) Leaves Extract in HCl Medium] Penelitian ini bertujuan untuk mengetahui pengaruh penambahan ekstrak daun miana (Coleus scutellaroides (L.) Benth.) (EDM) terhadap laju korosi baja lunak, mengidentifikasi jenis adsorpsi, dan mengkarakterisasi permukaan baja lunak baik sebelum maupun setelah penambahan EDM. Metode kehilangan berat (weight loss) digunakan untuk menguji laju korosi, jenis adsorpsi diidentifikasi melalui perhitungan termodinamika, dan karakterisasi permukaan dievaluasi dengan menggunakan fourier transform infrared (FTIR), X-Ray Diffraction (XRD), dan Scanning Electron Microscopy (SEM). Hasil penelitian menunjukkan bahwa laju korosi terendah didapatkan pada suhu 30℃ dengan konsentrasi EDM sebesar 6 g/L sebesar 0,153 mg/cm²jam dengan efisiensi inhibisi 88,288%. Analisis karakterisasi menunjukkan adanya interaksi antara EDM dengan permukaan baja lunak. Penelitian ini diharapkan dapat memberikan informasi terhadap penggunaan EDM sebagai inhibitor korosi yang ramah lingkungan. Kata kunci/keyword: Adsorpsi, daun miana, inhibisi korosi, adsorption, miana leaves, corrosion inhibitor
Inhibitor Korosi dari Ekstrak Daun Sambang Darah (Excoecaria cochinchinensis L.) pada Baja Lunak Dalam HCl: indonesia Gusniardi, Vira Anggita; Putri, Sanaq Elfira; Suryati, Suryati; Emriadi, Emriadi
Chempublish Journal Vol. 7 No. 2 (2023): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v7i2.29254

Abstract

Corrosion inhibition studies in mild steels in HCl medium by extracts of sambang darah leaves (Excoecaria cochinensis L.) (EDSD) have been conducted using weight loss methods, Fourier-Transform Infrared Spectroscopy (FTIR), contact angle and Scanning Electron Microscopy (SEM). The study is aimed at determining the effectiveness of EDSD inhibition as a corrosion inhibitor in HCl medium. The inhibition efficiency was found to increase with increasing concentration of EDSD and decrease with increasing temperature. The results showed that EDSD was capable of inhibiting mild steel corrosion with an inhibitory efficiency of 87.972% at EDSD 6 g/L in 1 M HCl solution. EDSD adsorption on mild steel surfaces follows Langmuir's isoterm adsorption. The FTIR analysis showed interaction between the EDSD and the surface of the mild steel. The contact angle analysis indicated that the mild steel surface is hydrophobic with the presence of the EDSD. SEM analysis shows a change in the surface of mild steel immersed in a 1 M HCl medium without and with the addition of EDSD.
Synergetic Effect of Potassium Iodide and Miana (Coleus scutellaroides (L.) Benth.) Leaves Extract on Mild Steel in HCl Medium Putri, Sanaq Elfira; Gusniardi, Vira Anggita; Suryati, Suryati; Emriadi, Emriadi
Hydrogen: Jurnal Kependidikan Kimia Vol. 11 No. 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.9810

Abstract

Due to its low carbon content, mild steel is prone to corrosion. Therefore, corrosion inhibitors are needed to decrease the corrosive rate of mild steel. This research aims to investigate the influence of adding potassium iodide to miana leaves extract (Coleus scutellaroides (L.) Benth.) (MLE) on the corrosion rate of mild steel, identify the type of adsorption, synergistic effects and characterize the surface of mild steel both before and after the addition of potassium iodide. The weight loss method is employed to test the corrosion rate, and the type of adsorption is identified through thermodynamic calculations. Surface characterization is evaluated using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). As potassium iodide is added, the weight loss findings show an increase in inhibitory efficiency. When potassium iodide concentration was 0.4 g/L and temperature was 30°C, the maximum inhibitory efficiency was attained, which was 92.784%. Characterization analysis indicates the interaction between potassium iodide and MLE with the surface of mild steel. This research has not been explored yet and is expected to provide information on the use of potassium iodide and MLE as environmentally friendly corrosion inhibitors.
Co-Authors Emriadi - Gusniardi, Vira Anggita Suryati Suryati