ARDI, RISQI CHONIYI (2026) ANALISIS PENGARUH NIKEL (Ni) TERHADAP LAJU KOROSI PADA MATERIAL FULL HEUSLER Fe2CrAl-xNix. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
This study analyzes the effect of Nickel substitution (x = 0; 0.05; 0.2; and 0.5) on the Full Heusler alloy Fe₂CrAl₁₋ₓNiₓ in RO water and 3.5% NaCl media using Tafel Polarization, Chronoamperometry (CA), and Electrochemical Impedance Spectroscopy (EIS). Quantitative results indicate that the specimen without Nickel (x = 0) exhibits superior corrosion resistance, characterized by the lowest corrosion rates (0.0037 mmPY in RO water and 0.0185 mmPY in 3.5% NaCl), the highest polarization resistance (Rp) values (22,977 Ω and 11,654 Ω), and the lowest diffusion coefficient (D). Conversely, increasing the Ni content to x = 0.5 in chloride media triggers an extreme surge in the corrosion rate, reaching 13.413 mmPY. Qualitatively, the addition of Ni impairs passivation resistance; low Ni content (x = 0.05) induces a d-band center shift that increases surface reactivity, whereas high Ni content (x = 0.5) causes Chromium (Cr) depletion and accelerates the penetration of Cl⁻ ions, thereby damaging the passive layer. In conclusion, the pure Fe₂CrAl alloy (x = 0) represents the most optimal and corrosion-stable composition. Keywords: Fe₂CrAl₁₋ₓNiₓ Heusler alloy, Nickel doping, Corrosion rate, Tafel polarization, EIS Penelitian ini menganalisis pengaruh substitusi Nikel (X = 0; 0.05; 0.2; dan 0.5) pada paduan Full Heusler Fe₂CrAl₁₋xNix dalam media Air RO dan NaCl 3,5% menggunakan metode Polarisasi Tafel, Chronoamperometry (CA), dan Electrochemical Impedance Spectroscopy (EIS). Hasil kuantitatif menunjukkan bahwa spesimen tanpa Nikel (x = 0) memiliki ketahanan korosi paling unggul dengan laju korosi terendah (0,0037 mmPY pada Air RO dan 0,0185 mmPY pada NaCl 3,5%), resistansi polarisasi (
| Item Type: | Thesis (S1) |
|---|---|
| NIM/NIDN Creators: | 41322010030 |
| Uncontrolled Keywords: | Paduan Heusler Fe₂CrAl₁₋xNix, Doping Nikel, Laju Korosi, Polarisasi Tafel, EIS. |
| Subjects: | 500 Natural Science and Mathematics/Ilmu-ilmu Alam dan Matematika > 530 Physics/Fisika > 539 Modern Physics/Fisika Modern > 539.7 Atomic and Nuclear Physics/Fisika Atom, Fisika Nuklir 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin 700 Arts/Seni, Seni Rupa, Kesenian > 730 Plastic Arts and Sculpture/Seni Plastik dan Seni Patung > 739 Art Metalwork/Seni Logam, Kerajinan Logam > 739.5 Copper, Bronze, Alumunium Art Works/Seni Tembaga, Seni Perunggu, Seni Alumunium > 739.56 Nickel/Nikel |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | khalimah |
| Date Deposited: | 05 Sep 2026 02:55 |
| Last Modified: | 05 Sep 2026 02:55 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/103649 |
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