Prabaswari, Luh Made Maura Rikan Benaya (2026) Evaluasi Performa Cat Self-Polishing Copolymer (SPC) Komersil: Pengaruh Persentase Cu2O dan ZnO, serta Analisis Parameter Air Laut Terhadap Laju dan Jenis Biofouling. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Biofouling merupakan akumulasi organisme laut pada permukaan terendam yang dapat menurunkan performa struktur kelautan dan meningkatkan risiko korosi. Efektivitas cat antifouling tipe Self-Polishing Copolymer (SPC) sangat dipengaruhi oleh komposisi biosida utama Cu2O dan biosida pendukung ZnO, serta dinamika kondisi fisikokimia perairan. Perbedaan karakteristik perairan tropis di Indonesia diduga menyebabkan variasi tingkat pertumbuhan biofouling pada setiap lokasi operasional kapal. Oleh karena itu, penelitian ini bertujuan untuk menganalisis pengaruh variasi persentase Cu2O dan ZnO pada tiga cat SPC komersial (Merek A: 22,44% Cu2O, 2,49% ZnO; Merek B: 20,54% Cu2O 3,28% ZnO; Merek C: 15,78% Cu2O, 0,18% ZnO) terhadap persentase cakupan biofouling dan nilai fouling rating (FR). Selain itu, riset ini mengkaji korelasi antara parameter fisikokimia air laut (suhu, pH, konduktivitas, dan nitrat) terhadap jenis organisme biofouling yang dominan. Pengujian dilakukan secara eksperimental menggunakan panel baja ASTM A36 bersistem coating sesuai standar ASTM D3623-78a. Panel uji direndam selama empat bulan di tiga titik lokasi perairan Galangan Kapal di PT. X, Surabaya yang merepresentasikan gradien kondisi hidrodinamika (dinamis, transisi, dan stagnan). Analisis citra visual menggunakan perangkat lunak Ilastik untuk segmentasi biofouling dan Fiji ImageJ untuk persentase coverage, sedangkan laju biofouling dievaluasi berdasarkan standar ASTM D6990. Hasil penelitian menunjukkan bahwa persentase Cu₂O dan ZnO serta variasi lokasi berpengaruh signifikan terhadap persentase cakupan biofouling dan nilai FR (p value < 0,05). Cat Merek B menghasilkan performa antifouling terbaik dengan rata-rata cakupan biofouling sebesar 60,78% dan nilai FR tertinggi sebesar 98,91. Lokasi 1 menghasilkan rata-rata cakupan biofouling terendah sebesar 48,61%, sementara lokasi 3 memberikan rata-rata nilai FR tertinggi sebesar 98,97. Hasil uji korelasi Spearman menunjukkan bahwa suhu, pH, nitrat, dan konduktivitas memiliki hubungan terhadap jenis dan intensitas biofouling, namun hanya suhu, nitrat konduktivitas yang menunjukkan korelasi signifikan (p value < 0,05) terhadap biofouling.
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Biofouling is the accumulation of marine organisms on submerged surfaces that can reduce the performance of marine structures and increase the risk of corrosion. The
effectiveness of Self-Polishing Copolymer (SPC) antifouling paint is greatly influenced by the composition of the main biocide Cu₂O and the supporting biocide ZnO, as well as by the dynamics of the physicochemical conditions of the water. Differences in the characteristics of tropical waters in Indonesia are suspected to cause variations in the rate of biofouling growth at each ship operational location. Therefore, this study aims to analyze the effect of variations in the percentage of Cu₂O and ZnO in three commercial SPC paints (Brand A: 22.44% Cu₂O, 2.49% ZnO; Brand B: 20.54% Cu₂O, 3.28% ZnO; Brand C: 15.78% Cu₂O, 0.18% ZnO) on the percentage of biofouling coverage and fouling rating (FR) values. Additionally, this research examines the correlation between seawater physicochemical parameters (temperature, pH, conductivity, and nitrate) and the dominant biofouling organisms. Testing was conducted experimentally using ASTM A36 steel panels with a coating system in accordance with ASTM D3623-78a standards. The test panels were immersed for four months at three locations in PT X Surabaya waters, representing a gradient of hydrodynamic conditions (dynamic, transitional, and stagnant). Visual image analysis was performed using Ilastik software for biofouling segmentation and Fiji ImageJ for coverage percentage calculation, while the biofouling rate was evaluated based on the ASTM D6990 standard. The results showed that variations in Cu₂O and ZnO percentage, as well as immersion location, had a significant effect on both biofouling coverage percentage and FR (p-value < 0.05). Brand B coating exhibited the best antifouling performance, with an average biofouling coverage of 60.78% and the highest average FR of 98.91. The dynamic location resulted in the lowest average biofouling coverage (48.61%), whereas the stagnant location produced the highest average FR (98.97). Spearman correlation analysis indicated that temperature, pH, nitrate, and conductivity were associated with the type and intensity of biofouling; however, only temperature and conductivity showed statistically significant correlations (p-value < 0.05).
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | biofouling, Self-Polishing Copolymer (SPC), Cu₂O, ZnO, fouling rating, cakupan biofouling, biofouling, Self-Polishing Copolymer (SPC), cuprous oxide (Cu₂O), fouling rating, seawater parameters. |
| Subjects: | Q Science T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC205 Harbors--Design and construction. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Luh Made Maura Rikan Benaya Prabaswari |
| Date Deposited: | 22 Jul 2026 07:50 |
| Last Modified: | 22 Jul 2026 08:01 |
| URI: | http://repository.its.ac.id/id/eprint/136280 |
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