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Widjajanti, Kristina
Jurusan Teknik Elektro, Politeknik Negeri Malang
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Social Sciences

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Journal : Jurnal Teknik Kimia dan Lingkungan

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Asam Askorbat, Natrium Nitrit dan Natrium Fosfat sebagai Inhibitor Laju Korosi pada Alumunium dan Seng dalam Media Biosolar Dyah Ratna Wulan; Noor Isnaini Azkiya; Kristina Widjajanti; Nadua Bella Wardani; Yanty Maryanty
Jurnal Teknik Kimia dan Lingkungan Vol. 6 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (371.024 KB) | DOI: 10.33795/jtkl.v6i1.245

Abstract

Korosi merupakan penurunan mutu logam akibat adanya reaksi elektrokimia dengan lingkungannya, sedangkan bio-korosi merupakan suatu peristiwa korosi yang dipengaruhi oleh mikroorganisme terutama dari kelompok Sulfat Reducing Bacteria (SRB). SRB mengakibatkan terjadinya korosi logam pada tangki penyimpanan biosolar. Laju korosi dapat diturunkan dengan cara penambahan inhibitor organik maupun anorganik ke dalam suatu media korosi. Tujuan penelitian ini adalah mempelajari pengaruh inhibitor organik berupa asam askorbat, dan inhibitor anorganik berupa natrium nitrit dan natrium fosfat terhadap terhadap laju korosi dan efisiensi inhibitor pada logam alumunium (Al) dan seng (Zn) yang direndam dalam media biosolar dalam kondisi pH asam. Pengaruh ketiga jenis inhibitor yang masing-masing memiliki konsentrasi sebesar 25, 50, dan 75 ppm terhadap logam yang direndam dengan biosolar diinvestigasi menggunakan teknik penurunan berat logam. Pengukuran berat logam yang direndam dalam inhibitor dan media biosolar dilakukan pada variasi waktu 0, 1, 4, 7, dan 10 hari kemudian dilakukan analisa laju korosi dan efisiensi inhibisi. Masing-masing inhibitor dapat mengghambat laju korosi logam dengan efisiensi inhibisi tertinggi yaitu asam askorbat. Inhibitor terbaik dalam media biosolar yaitu asam askorbat 75 ppm yang dikontakkan dengan logam selama 10 hari dengan nilai efisiensi inhibitor asam askorbat terhadap logam alumunium sebesar 26,92 % dan seng sebesar 70,90 % Corrosion is a decrease in metal quality due to an electrochemical reaction with its environment while bio- corrosion is a corrosion event that is influenced by microorganisms, especially from the Sulfate Reducing Bacteria (SRB) group. This group of bacteria generally causes metal corrosion in biodiesel storage tanks. The corrosion rate can be reduced by adding organic or inorganic inhibitors. The purpose of this study was to study the effect of organic inhibitor such as ascorbic acid, and inorganic inhibitors such as sodium nitrite and sodium phosphate on the corrosion rate and inhibitor efficiency of aluminum and zinc metals immersed in biodiesel media under acidic pH conditions. The effect of the three types of inhibitors which each concentrations of 25, 50, and 75 ppm on metals immersed in biodiesel was investigated using weight loss techniques. The measurement of the weight of the metal immersed in the inhibitor and biodiesel media was carried out at various times of 0, 1, 4, 7, and 10 days and then calculated the corrosion rate and inhibition efficiency. The best inhibitor in biodiesel media is 75 ppm ascorbic acid which is in contact with metal for 10 days with has an efficiency value of ascorbic acid inhibitor against aluminum metal of 26,92 % and zinc of 70,90 %.
Co-Authors Aad H. Abdul Chalim Adi Candra Kusuma Ahmad W. Purwandi Arinalhaq Fatachul Aziiz Atika Yulia Sari Putri Azam Muzakhim Imammuddin Dewi Risalah Divac N.A. Divac Nabiel Akbar Dr. Dra. Utami Retno Pudjowati, M.Si Dwi Rahmawati DWI RAHMAWATI Dyah Ratna Wulan Dyah Ratna Wulan Dyah Ratna Wulan Farida Arinie Soelistianto Fuat Fuat Galih Putra Riatma Hudiono Hudiono Koesmarijanto Koesmarijanto Kusumawardani, Mila Luchis Rubianto M. Syirajuddin M. Syirajuddin Marinda Sukmawanta, Shafara Najla Martono Dwi Atmadja May Kurnia Pratiwi Moh. Hartono Mohammad Taufik Muhammad Rivai Nabila Widyantari Nadua Bella Wardani Nadua Bella Wardani Noor Isnaini Azkiya Noor Isnaini Azkiya, Noor Isnaini Nugroho Suharto Nurul Hidayati Pudjowati, Utami Retno Rahmad Bustanul Anwar, Rahmad Bustanul Ridho H.Y.P. Shafara Najla Marinda Sukmawanta Sri Wahyuni Dali Surya Sari Faradiba Takwanto, Anang Wardatun Nabilah Yani Ratnawati Yanty Maryanty Yanty Maryanty, Yanty