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All Journal JPSE (Journal of Physical Science and Engineering) Jurnal Pijar MIPA
Syamsul Bahtiar
Metallurgical Engineering Study Program, Faculty of Environmental and Mineral Technology, Sumbawa University of Technology
Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Electrical & Electronics Engineering Materials Science & Nanotechnology Mathematics Physics

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Effect of the addition of inhibitors of kirinyuh leaf (Chromolaena Odorata) in methanol extract on corrosion rate of ASTM 36 steel Fauzi Widyawati; Syamsul Hidayat; Syamsul Bahtiar; Musbihin Musbihin
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v17i6.4276

Abstract

Kirinyuh leaves (Chromolaena Odorata) contain alkaloids, saponins, flavonoids, phenols, and tannins with the potential as a natural inhibitor that can be used to inhibit the rate of corrosion. Kirinyuh leaf extract inhibitors were added at various concentrations of 100 ppm, 200 ppm, 300 ppm, 400 ppm, and 500 ppm, which were sprayed onto the sample surface before being soaked for seven days. Calculation of the corrosion rate using the method of weight loss (weight loss). The results showed that kirinyuh leaf extract effectively inhibited the corrosion rate. The smallest corrosion rate value was found in the sample with the addition of 400 ppm inhibitor concentration, which was 2.053 ppm. Meanwhile, an efficiency inhibitor was also found in the same concentration of inhibitor that is equal to 87%.
Physical and Mechanical Properties of Fiber Board from Corn Husk Fiber Rita Desiasni; Fauzi Widyawati; Yuliana Fitri Sersaningsih; Syamsul Bahtiar; Amirin Kusmiran
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Using agricultural waste materials, namely corn husk fiber (CHF), to reduce agricultural waste and recycle corn husk waste into sustainable engineering materials is relatively significant due to the decreasing number of woods. This study aims to analyze the effect of the volume fraction of CHF with polyester (PE) on the physical and mechanical strength of fiberboard composites with variations in volume fraction of 25  percent fiber : 75 percent PE, 50 percent fiber : 50 percent PE, and 75 percent fiber : 25 percent PE. Composites are made by the hand layup method. Fibers were pretreated by immersing 5 percent NaOH for 2 hours. The results of testing the physical properties of the highest density composite board at a volume fraction of 25 percent fiber : 75 percent PE of 0.85 g/cm³ and the lowest moisture absorption value was at 0.49 percent. The results of the mechanical board test in the form of the modulus of elasticity (MOE) test got the highest test value at the fiber volume fraction 25 percent fiber : 75 percent PE, which was 1179.2 MPa as well as the highest modulus of rupture (MOR) test value was found in the volume fraction 25 percent fiber: 75 percent PE that is equal to 9.4 MPa. Based on this result research, the average strength of the mechanical properties increases with the increase in the number of matrices. That indicates a reasonably good bond between the fiber and the matrix. The results of the water content test also increased as the density value increased.DOI: 10.17977/um024v7i22022p134
Co-Authors Amirin Kusmiran Fauzi Widyawati Musbihin Musbihin Rita Desiasni Syamsul Hidayat Yuliana Fitri Sersaningsih