Ashari, Nur Muhammad (2026) Optimasi Perlindungan Korosi Eksternal Pipa Minyak Mentah Baja Karbon ASTM A53 melalui Modifikasi Coating Epoksi dengan Nanopartikel SiO₂ dan ZnO di Lingkungan KWG 55 – SP I Pertamina EP Cepu. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Korosi pada pipa baja karbon ASTM A53 yang digunakan sebagai jalur distribusi minyak mentah dari Sumur KWG 55 menuju SP I Kawengan Pertamina EP Cepu dapat menurunkan integritas struktur dan memperpendek umur pakai pipa. Penelitian ini bertujuan menganalisis karakteristik korosi serta mengevaluasi efektivitas penambahan coating epoxy hibrida berbasis nanopartikel SiO₂ dan ZnO dibandingkan coating standar Pertamina. Pengujian dilakukan menggunakan metode weight loss dalam larutan HCl 1 M dengan waktu perendaman 2, 4, dan 6 hari pada suhu ruang, pengamatan makro, serta pull-off test. Hasil penelitian menunjukkan bahwa spesimen tanpa coating memiliki laju korosi tertinggi sebesar 7,046 mmpy pada perendaman 6 hari. Coating standar Polyken 1027 mampu menurunkan laju korosi menjadi 2,228 mmpy atau sebesar 68,37% dibandingkan tanpa coating. Sementara itu, coating epoxy modifikasi hibrida Variasi 2 (1 wt% SiO₂ + 1 wt% ZnO) menunjukkan laju korosi terendah sebesar 0,049 mmpy dengan penurunan laju korosi mencapai 99,30% dibandingkan tanpa coating dan sekitar 97,78% dibandingkan coating standar. Pengamatan makro menunjukkan spesimen tanpa coating mengalami pitting corrosion yang parah, sedangkan coating standar dan coating Epoxy modifikasi didominasi uniform corrosion dengan tingkat kerusakan yang lebih rendah. Hasil pull-off test menunjukkan nilai adhesi coating epoxy modifikasi sebesar 2,367 MPa, lebih tinggi 13,81% dibandingkan coating standar Polyken 1027 sebesar 2,04 MPa. Dari sisi ekonomi, estimasi penambahan biaya bahan baku pelapisan epoxy modifikasi hibrida sebesar Rp299.989 per pipa (diameter 3 inci dan panjang 8 meter). Meskipun membutuhkan investasi awal yang sedikit lebih tinggi, coating epoxy modifikasi hibrida mampu memberikan perlindungan korosi yang lebih efektif, memiliki daya lekat yang lebih baik, meningkatkan keandalan sistem perpipaan serta menekan biaya pemeliharaan dalam jangka panjang dibandingkan coating standar Pertamina.
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Corrosion in ASTM A53 carbon steel pipelines used for crude oil transportation from KWG 55 Well to SP I Kawengan, Pertamina EP Cepu, can reduce structural integrity and shorten pipeline service life. This study aimed to analyze the corrosion characteristics and evaluate the effectiveness of a hybrid epoxy coating modified with SiO₂ and ZnO nanoparticles compared with the standard Pertamina coating. Corrosion testing was conducted using the weight loss method in a 1 M HCl solution with immersion periods of 2, 4, and 6 days at room temperature, followed by macrostructural observations and pull-off adhesion testing. The results showed that the uncoated specimen exhibited the highest corrosion rate of 7.046 mmpy after 6 days of immersion. The standard Polyken 1027 coating reduced the corrosion rate to 2.228 mmpy, representing a 68.37% reduction compared with the uncoated specimen. Meanwhile, the modified hybrid epoxy coating Variation 2 (1 wt.% SiO₂ + 1 wt.% ZnO) exhibited the lowest corrosion rate of 0.049 mmpy, corresponding to a 99.30% reduction compared with the uncoated specimen and approximately a 97.78% reduction compared with the standard coating. Macrostructural observations revealed severe pitting corrosion on the uncoated specimen, whereas the standard coating and the modified epoxy coating predominantly exhibited uniform corrosion with significantly lower levels of damage. The pull-off test results indicated that the modified epoxy coating achieved an adhesion strength of 2.367 MPa, which was 13.81% higher than that of the standard Polyken 1027 coating (2.04 MPa). From an economic perspective, the estimated additional raw material cost for the modified hybrid epoxy coating was IDR 299,989 per pipeline (3-inch diameter and 8 m length). Although it requires a slightly higher initial investment, the modified hybrid epoxy coating provides more effective corrosion protection, better adhesion performance, improves pipeline system reliability, and reduces long-term maintenance costs compared with the standard Pertamina coating.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Coating Epoxy, SiO₂, ZnO, laju korosi, weight loss, Pull of Test, Makro Test, analisis ekonomi, Epoxy coating, SiO₂, ZnO, corrosion rate, weight loss, Pull of Test, Makro Test,economic analysis. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TA Engineering (General). Civil engineering (General) > TA418.9.C57 Coatings 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: | Nur Muhammad Ashari |
| Date Deposited: | 22 Jul 2026 02:41 |
| Last Modified: | 22 Jul 2026 02:41 |
| URI: | http://repository.its.ac.id/id/eprint/136169 |
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