Rizal, Muhammad Saiful (2019) Pemanfaatan Ekstrak Kulit Biji Bunga Matahari (Helianthus Annus) Sebagai Inhibitor Organik Pada Baja API 5L Grade B Media Larutan HCL 1M. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Korosi adalah perubahan sifat material khususnya logam akibat reaksi dengan lingkungan sekitarnya. Salah satu cara untuk menghambat korosi adalah dengan penambahan inhibitor. Inhibitor organik merupakan inhibitor yang dianggap ramah lingkungan
Dalam penelitian ini digunakan ekstrak daun enceng gondok sebagai inhibitor organik. Material yang digunakan adalah baja API 5L Grade B dalam larutan HCl 1M sebagai media korosif dengan konsentrasi ekstrak yang digunakan pada penelitian ini sebesar 100mg – 400mg dari jumlah larutan HCl 1M yang digunakan dalam pengujian. Jenis pengujian yang dilakukan pada penelitian ini adalah Electrochemical Impedance Spectroscopy, Potentiodynamic Polarization, Scanning Electron Microscopy, dan Pengurangan Berat.
Hasil pengujian menunjukkan adanya penurunan laju korosi pada baja API 5L Grade B dalam larutan HCl 1M ketika ditambahkan inhibitor ekstrak kulit biji bunga matahari. Pada pengujian polarisasi potensiodinamik didapatkan laju korosi pada sample tanpa inhibitor sebesar 28,327 mm/year. Sedangkan pada pengujian dengan penambahan inhibitor paling besar sebesar 400mg, laju korosi turun menjadi 0,12333mm/year dengan nilai efisiensi 99,564%.
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Corrosion is a change of material properties especially metals due to reaction with it’s surrounding environment. One way to inhibit corrosion is by adding an inhibitor. Organic inhibitors are inhibitors that are considered environmentally friendly
This study using Sun flower hull seed extract as an organicinhibitor. The material is API 5L Grade B steel in 1M HCl solution as corrosive medium with 100mg – 400mg of the amountof HCl 1M solution extract concentration used in the test. The type of testing method thatused in this study is EIS (Electrochemical Impedance Spectroscopy), PDP (Potentiodynamic Polarization), SEM (Scanning Electrone Microscopy), and Weight Loss.
The test results showed a decrease in corrosion rate in API 5L Grade B steel in 1M HCl solution when sun flower hull seed extract inhibitor has been added. In potentiodynamic polarization testing, the corrosion rate of a sample without inhibitor addition was 28,327 mm/year. While the test with the addition of the largest amount of inhibitor of 400mg the corrosion rate decreased to 0,12333 mm/year with 99,564% efficieny. That was the highest efficiency among all of the concentration variable
| Item Type: | Thesis (Diploma) |
|---|---|
| Additional Information: | RSMI 620.112 23 Riz p-1 2019 |
| Uncontrolled Keywords: | Korosi, Inhibitor Organik, Kulit Biji Bunga Matahari, Baja API 5L, HCL. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Rizal Muhammad Saiful |
| Date Deposited: | 22 Jul 2026 03:14 |
| Last Modified: | 22 Jul 2026 03:14 |
| URI: | http://repository.its.ac.id/id/eprint/68568 |
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