Faiz, Daffa Ikzaz (2026) Analisis Efektivitas Penggunaan Nozzle dengan Ukuran Berbeda pada Airless Spray Ditinjau dari Hasil Dry Film Thickness (DFT) Pengecatan Material Plat. Undergraduate thesis, Universitas Muhammadiyah Surabaya.
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Abstract
Pengecatan merupakan salah satu proses penting dalam industri perkapalan dan manufaktur guna memberikan perlindungan terhadap korosi serta meningkatkan estetika permukaan logam. Salah satu metode pengecatan yang umum digunakan adalah airless spray, yang memiliki keunggulan dalam hal kecepatan dan ketebalan lapisan yang seragam. Salah satu faktor yang memengaruhi hasil pengecatan adalah ukuran nozzle, yang berperan dalam menentukan pola semprot dan volume cat yang dikeluarkan, sehingga memengaruhi ketebalan lapisan cat kering atau Dry Film Thickness (DFT). Penelitian ini bertujuan untuk menganalisis efektivitas penggunaan berbagai ukuran nozzle terhadap hasil DFT pada pengecatan plat baja. Metode yang digunakan adalah eksperimen langsung dengan menggunakan airless spray dan variasi ukuran nozzle. Setiap pengecatan dilakukan dalam kondisi tekanan, jarak semprot, jenis cat, dan metode aplikasi yang sama. Pengukuran DFT dilakukan menggunakan alat Elcometer di beberapa titik per plat, lalu dihitung nilai rata-rata DFT dari tiap ukuran nozzle. Hasil penelitian menunjukkan bahwa ukuran nozzle berpengaruh signifikan terhadap hasil DFT. Penilitian ini di harapkan dapat memberikan gambaran mengenai pemilihan ukura Nozzle yang paling sesuai dengan standar spesifikasi 15-25 μm. Dengan demikian, pemilihan ukuran nozzle yang tepat dapat meningkatkan kualitas pengecatan sekaligus mengoptimalkan penggunaan material cat.
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Painting is a crucial process in the shipbuilding and manufacturing industries, serving both as corrosion protection and as an enhancement of metal surface aesthetics. One commonly used coating technique is the airless spray method, which offers advantages in terms of application speed and uniform coating thickness. Among the primary factors influencing coating quality is the nozzle size, which determines the spray pattern and paint discharge volume, thereby affecting the Dry Film Thickness (DFT) of the coating. This study aims to analyze the effectiveness of various nozzle sizes on DFT results in steel plate painting. The research employs an experimental method using an airless spray system with different nozzle size variations. Each painting test was carried out under consistent conditions, including pressure, spray distance, paint type, and application method. DFT measurements were performed using an Elcometer device at several points on each plate, and the average DFT value was calculated for each nozzle size. The findings indicated that nozzle size has a significant effect on DFT outcomes. This study is expected to provide insights into selecting the most suitable nozzle size in accordance with the standard specification range of 15–25 μm. Hence, appropriate nozzle selection can improve coating quality and optimize paint material utilization.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | airless spray, nozzle, dry film thickness (DFT), efektivitas, pengecatan plat, airless spray, nozzle, dry film thickness (DFT), effectiveness, plate painting. |
| Subjects: | T Technology > T Technology (General) T Technology > TP Chemical technology V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering |
| Divisions: | 08. Fakultas Teknik > Teknik Perkapalan |
| Depositing User: | Daffa Ikzaz Faiz |
| Date Deposited: | 12 May 2026 04:28 |
| Last Modified: | 12 May 2026 04:39 |
| URI: | https://repository.um-surabaya.ac.id/id/eprint/11588 |
