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Hastuti, Kurnia
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Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Perbandingan Efisiensi Inhibitor Organik dan Anorganik pada Penurunan Laju Korosi Material Radiator Hastuti, Kurnia; Argak Dwi Wandana; Yulianto, Dody; Dedikarni; Rahman, Jhonni; Anwar, Irwan
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.12338

Abstract

Radiator adalah suatu sistem atau komponen yang berfungsi utuk menjaga supaya temperatur mesin dalam kondisi ideal. Inhibitor anorganik telah terbukti dapat menurunkan laju korosi namun memiliki efek negatif karena materialnya yang tidak ramah lingkungan dan bersifat racun. Berdasarkan hal tersebut maka penggunaan inhibitor anorganik perlu dibatasi. Pada penelitian ini akan dibandingkan efisiensi inhibitor organik dan anorganik dalam menurunkan laju korosi. Inhibitor anorganik yang digunakan adalah Natrium Kromat (Na2CrO4) dengan konsentrasi 0,5%, 0,7%, dan 0,9%. Sedangkan inhibitor organik adalah Minyak Biji Kapas dengan variasi konsentrasi yaitu 25%, 30% dan 35% dalam waktu perendaman 21 hari dalam setiap inhibitor. Selanjutnya akan diuji ketahanan korosinya dengan media air biasa. Hasil pengujian laju korosi natrium kromat terendah pada konsentrasi 0,9% dengan nilai 0,0815 mm/y (0,628%) dengan waktu 21 hari. Laju korosi terendah pada konsentrasi 25% dengan nilai 0,1614 mm/y (0,273%). Penelitian ini menunjukan efisiensi perbandingan terbaik masih di lihat pada inhibitor anorganik natrium kromat, setaiap konsentrasi laju korosi semakin rendah.
THE EFFECT OF VARIATION OF MIXTURE OF IJUK FIBER AND COCONUT FIBER WITH EPOXY MATRIX ON THE MECHANICAL STRENGTH OF COMPOSITE Li, Elia Fransisco Manalu; Yulianto, Dody; Kurniadi, Shandy; Prasetyo, Ari; Saragih, Sehat Abdi; Lazrisyah, Sutan; Rahman, Jhonni; Hastuti, Kurnia; Elfiano, Eddy
Journal of Renewable Energy and Mechanics Vol. 8 No. 02 (2025): REM VOL 8 No 02 2025
Publisher : UIR PRESS

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Abstract

Fibre-based composites continue to be investigated and developed as alternative materials to replace metals, primarily due to their advantageous properties of high strength and lower weight compared to metals. This study aims to fabricate fibre composites using ijuk fibres and coconut coir fibres as a matrix with epoxy resin. In this research, mixtures of ijuk fibres, coconut coir fibres, and epoxy resin were prepared in proportions of 20%:30%:50%, 25%:25%:50%, and 30%:20%:50%. The highest bending strength test results were obtained in specimen 3, which consisted of a mixture of 30% palm fibre, 20% coconut fibre, and 50% epoxy resin.  This specimen had a tensile strength value of 18.93 MPa and an impact value of 0.387 Joules/mm². This result can be attributed to the increasing proportion of ijuk fibres and the decreasing proportion of coconut coir fibres within the epoxy resin matrix, which influences the elastic strain of the fibre core (cellulose). The higher cellulose content of ijuk fibres enhances bending strength and impact resistance. This is supported by the impact (Charpy) test results, where specimen 3 (30%: 20%:50%) exhibited the highest bending and impact strength. Conversely, increasing the proportion of coconut coir fibres reduced the impact strength. The fracture morphology revealed that specimen 1 exhibited a brittle fracture, whereas specimens 2 and 3 exhibited a fibrous brittle fracture.
Co-Authors Andika, Roni Andika Argak Dwi Wandana Ari Prasetyo Arizona, Rafil Candra Saputra, Riwendra Dedikarni Eddy Elfiano Irwan Anwar Jhonni Rahman KAROKARO, HENDRA SETIAWAN Kurniadi, Shandy Lazrisyah, Sutan Li, Elia Fransisco Manalu Lihantoro, Bayu Martaheru, Nover Muhammad Mustaqim Nurisa, T.M. Andi Rintami, Muhammad Rycha Melysa, Rycha Sehat Abdi Saragih Subekti , Purwo Suherman, Hendra Suripto, Heri Syawaldi Yulianto, Dody Zinomeza , Eho