Putrandi, Fransiskus Tommi (2017) Pemanfaatan Ekstrak Daun Pepaya (Carica Papaya) Sebagai Inhibitor Organik Pada Baja API 5L Grade B Dalam Media HCl 1M. Diploma thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
2114030114-NON_DEGREE.pdf - Published Version Download (3MB) | Preview |
Abstract
Korosi adalah perubahan sifat material khususnya logam akibat reaksi dengan lingkungan sekitarnya. Korosi cenderung bersifat menurunkan kualitas sifat mekanik material. Salah satu cara untuk menghambat korosi adalah dengan penambahan inhibitor. Inhibitor organik merupakan inhibitor yang dianggap ramah lingkungan
Dalam penelitian ini digunakan ekstrak daun pepaya 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 0,5 – 2,5% dari jumlah larutan HCl yang digunakan dalam pengujian. Jenis pengujian yang dilakukan pada penelitian ini adalah EIS (Electrochemical Impedance Spectroscopy), PDP (Potentiodynamic Polarization), FTIR (Fourier Transform Infra Red), dan pengurangan berat (weight loss).
Hasil pengujian menunjukkan adanya penurunan laju korosi pada baja API 5L Grade B dalam larutan HCl 1M ketika ditambahkan inhibitor ekstrak daun pepaya. Pada pengujian polarisasi potensiodinamik didapatkan laju korosi pada sample tanpa inhibitor sebesar 21,43 mm/year. Sedangkan pada pengujian dengan penambahan inhibitor paling besar sebesar 2,5% laju korosi turun menjadi 0,4 mm/year dengan nilai efisiensi 97%. Ini merupakan efisiensi tertinggi dari semua variabel konsentrasi
============================================================
Corrosion is a change of material properties especially metals due to reaction with it’s surrounding environment. Corrosion tends to degrade the quality of material’s mechanical properties. One way to inhibit corrosion is by adding an inhibitor. Organic inhibitors are inhibitors that are considered environmentally friendly
This study using papaya leaf extract as an organic inhibitor. The material is API 5L Grade B steel in 1M HCl solution as corrosive medium with 0.5 - 2.5% of the amount of HCl solution extract concentration used in the test. The type of testing method that used in this study is EIS (Electrochemical Impedance Spectroscopy), PDP (Potentiodynamic Polarization), FTIR (Fourier Transform Infra Red), and weight loss
The test results showed a decrease in corrosion rate in API 5L Grade B steel in 1M HCl solution when papaya leaf extract inhibitor has been added. In potentiodynamic polarization testing, the corrosion rate of a sample without inhibitor addition was 21.43 mm/year. While the test with the addition of the largest amount of inhibitor of 2.5% the corrosion rate decreased to 0,4 mm/year with 97% efficieny. That was the highest efficiency among all of the concentration variable
| Item Type: | Thesis (Diploma) |
|---|---|
| Uncontrolled Keywords: | papaya leaf; carica papaya; organic inhibitor; API 5L; daun pepaya; inhibitor organik |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TN Mining engineering. Metallurgy T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21401-(D3) Diploma 3 |
| Depositing User: | Fransiskus Tommi Putrandi |
| Date Deposited: | 17 Jan 2018 02:51 |
| Last Modified: | 05 Mar 2019 03:40 |
| URI: | http://repository.its.ac.id/id/eprint/48552 |
Actions (login required)
 |
View Item |