Ekstrak Daun Salam Koja (Murraya Koenigii (L.) Spreng) sebagai Inhibitor Korosi Baja ASTM A36 dalam Larutan H2SO4

Biwai, Fairiza Naghda (2023) Ekstrak Daun Salam Koja (Murraya Koenigii (L.) Spreng) sebagai Inhibitor Korosi Baja ASTM A36 dalam Larutan H2SO4. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Korosi adalah proses perubahan sifat suatu bahan akibat pengaruh atau reaksi dengan lingkungan sekitarnya yang cencerung menurunkan kualitas sifat material. Salah satu cara pengendaliannya adalah dengan penambahan inhibitor. Inhibitor organik merupakan inhibitor yang dianggap ramah lingkungan. Dalam penelitian ini digunakan ekstrak daun salam koja sebagai inhibitor organik, dengan material pengujian yang digunakan berupa baja tahan karat austenistik ASTM A36. Untuk media korosifnya H2SO4 2 M dengan variasi kosentrasi 1000 mg/L, 1500 mg/L, 2000 mg/L, 2500 mg/L, dan 3000 mg/L. Jenis pengujian yang dilakukan pada penelitian ini adalah Weight loss, Polarisasi Potensiodinamik, dan Scanning Electron Microscope. Hasil pengujian menunjukkan adanya penurunan laju korosi pada baja ASTM A36 ketika ditambahkan inhibitor. Pada uji Weight loss, nilai laju korosi tanpa inhibitor sebesar 128,083 mmpy sedangkan dengan inhibitor 25,542 mmpy dan efisiensi inhibisinya sebesar 80,058%. Pada pengujian Polarisasi Potensiodinamik, efisiensi yang dihasilkan sebesar 76,759%. Pengujian pendukung lainnya (SEM) menunjukkan penambahan inhibitor menghasilkan lapisan pelindung tipis pada permukaan baja ASTM A36
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Corrosion is a process of changing the properties of a material due to influence or reaction with the surrounding environment which tends to reduce the quality of material properties. One way to control it is by adding inhibitors. Organic inhibitors are considered environmentally friendly inhibitors. In this study, Salam koja leaf extract was used as an organic inhibitor, with the test material used being austenitic stainless steel ASTM A36. For the corrosive medium, H2SO4 2 M with concentration variations of 1000 mg/L, 1500 mg/L, 2000 mg/L, 2500 mg/L, and 3000 mg/L. The types of tests carried out in this study were weight loss, potentiodynamic polarization, and scanning electron microscope. The test results showed a decrease in the corrosion rate of ASTM A36 steel when inhibitors were added. In the Weight loss test, the value of the corrosion rate without an inhibitor was 128.083 mmpy while with an inhibitor it was 25.542 mmpy and the inhibition efficiency was 80.058%. In the Potentiodynamic Polarization test, the resulting efficiency was 76.759%. Other supporting tests (SEM) show the addition of inhibitors produces a thin protective layer on the surface of ASTM A36 steel.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	ASTM A36, Inhibitor Organik, Daun Salam Koja, H2SO4; ASTM A36, Organic Inhibitor, Salam Koja Leaf, H2SO4
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion T Technology > TA Engineering (General). Civil engineering (General) > TA467 Iron and Steel Corrosion and protection against corrosion
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Fairiza Naghda Biwai
Date Deposited:	14 Sep 2023 04:15
Last Modified:	14 Sep 2023 04:15
URI:	http://repository.its.ac.id/id/eprint/102019

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