Rizky, Nadira Azmiy Fitriyyah (2024) Analisis Mekanisme Inhibisi Ekstrak Kulit Jeruk Nipis Sebagai Inhibitor Terbarukan Untuk Baja Api 5L Grade B Dengan Variasi Temperatur Di Lingkungan Asam. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Korosi terjadi akibat reaksi elektrokimia antara logam dan lingkungan, yang berujung pada penurunan kualitas logam tersebut, seperti peningkatan kerapuhan, kasar, dan rentan terhadap kerusakan. Faktor-faktor seperti uap, air, asam, garam, dan suhu lingkungan yang tinggi beperan dalam memicu korosi logam. Salah satu metode untuk mencegah korosi ialah dengan menggunakan inhibitor. Inhbitor adalah suatu senyawa kimia yang dalam jumlah kecil namun dapat menahan atau menghambat rekasi korosi logam baja dengan lingkunganya. Salah satunya yang dapat digunakan untuk inhibitor organik yaitu kulit jeruk nipis. Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh inhibitor kulit jeruk nipis terhadap laju korosi yang terjadi pada baja API 5L grade B dengan media larutan H₂SO₄ 1M. Pembuatan ekstrak dengan menggunakan metode maserasi. Variasi yang digunakan pada penelitian ini adalah penambahan konsentrasi sebesar 150 mg, 200 mg, 250 mg dan variasi temperatur yang digunakan 25°C, 30°C, 35°C. Pengujian yang dilakukan pada sampel uji yaitu Polarisasi, EIS, weight loss, FTIR dan SEM. Pada pengujian polarisasi dengan efisiensi tertinggi terletak pada temperature 35°C konsentrasi 250 ppm sebesar 93.562% sedangkan pengujian EIS dengan efisiensi tertinggi berada pada temperature 35°C sebesar 87.501% konsentrasi 250 ppm. Dari pengujian weight loss di ambil dari sampel hasil terbaik pengujian polarisasi dan pengujian EIS dan di dapat hasil pengujian weight loss yaitu dengan efisiensi tertinggi sebesar 98,495% pada konsentrasi 250 ppm. Pengujian FTIR menunjukkan adanya gugus fungsi yang teradsorpsi pada permukaan baja API 5L grade B. Hasil SEM menunjukkan adanya lapisan tipis yang terbentuk, diduga lapisan ini yang membantu proses penghambatan laju korosi yang sedang terjadi pada spesimen.
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Corrosion occurs due to electrochemical reactions between metal and the environment, which leads to a decrease in the quality of the metal, such as increased brittleness, roughness, and susceptibility to damage. Factors such as steam, water, acid, salt, and high environmental temperatures play a role in triggering metal corrosion. One method to prevent corrosion is to use inhibitors. An inhibitor is a chemical compound which, in small amounts, can resist or inhibit the corrosion reaction of steel metal with its environment. One of them that can be used as an organic inhibitor is lime peel. This research was carried out with the aim of determining the effect of lime peel inhibitors on the rate of corrosion that occurs on API 5L grade B steel with 1M H₂SO₄ solution as the medium. Making extracts using the maceration method. The variations used in this research were additional concentrations of 150 mg, 200 mg, 250 mg and temperature variations used of 25°C, 30°C, 35°C. Tests carried out on test samples are Polarization, EIS, weight loss, FTIR and SEM. In the polarization test, the highest efficiency was at a temperature of 35°C, a concentration of 250 ppm, which was 93.562%, while in the EIS test, the highest efficiency was at a temperature of 35°C, which was 87.501%, a concentration of 250 ppm. From the weight loss test, the best results of the polarization test and EIS test were taken from the samples and the weight loss test results were obtained with the highest efficiency of 98.495% at a concentration of 250 ppm. FTIR testing shows that there are functional groups adsorbed on the surface of API 5L grade B steel. SEM results show that a thin layer is formed, it is thought that this layer helps the process of inhibiting the rate of corrosion that is occurring on the specimen.
Item Type: | Thesis (Diploma) |
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Uncontrolled Keywords: | Corrosion, Inhibitor Organic, Peel Lime, Steel API 5L, H2SO4, Korosi, Inhibitor Organik, Kulit Jeruk Nipis, Baja API 5L, H2SO4 |
Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials |
Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
Depositing User: | Nadira Azmiy Fitriyyah Rizky |
Date Deposited: | 02 Aug 2024 08:52 |
Last Modified: | 02 Aug 2024 08:52 |
URI: | http://repository.its.ac.id/id/eprint/110667 |
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