Pengaruh Sweep Blast Dan Non-Sweep Blast Terhadap Adhesi Sistem Duplex Coating (NORSOK M-501) Pada Hot-Dip Galvanized Steel Dengan Variasi Waktu

Cahyohartoto, Razan (2026) Pengaruh Sweep Blast Dan Non-Sweep Blast Terhadap Adhesi Sistem Duplex Coating (NORSOK M-501) Pada Hot-Dip Galvanized Steel Dengan Variasi Waktu. Diploma thesis, Institut Teknologi Sepuluh Nopember.

Text 5020221074-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (6MB) | Request a copy

Abstract

Sistem duplex coating yang mengombinasikan hot-dip galvanizing (HDG) dan lapisan epoxy merupakan metode proteksi korosi unggulan pada struktur baja di lingkungan offshore yang agresif. Kombinasi ini memberikan perlindungan sinergis melalui proteksi katodik dari lapisan seng dan mekanisme penghalang (barrier) dari coating organik. Namun, efektivitas sistem ini sangat bergantung pada kualitas adhesi antarmuka antara lapisan galvanis dan epoxy. Penelitian ini bertujuan untuk menganalisis pengaruh variasi waktu pencelupan HDG (5, 7, dan 9 menit) terhadap kekuatan adhesi sistem duplex pada baja karbon ASTM A36 berdasarkan standar NORSOK M-501. Proses galvanisasi mengacu pada ISO 1461, sementara pengujian daya lekat dilakukan menggunakan metode pull-off sesuai ASTM D4541. Parameter pendukung seperti ketebalan lapisan seng (Dry Film Thickness/DFT) dan profil permukaan juga dievaluasi. Hasil pengujian menunjukkan bahwa peningkatan waktu pencelupan cenderung meningkatkan ketebalan lapisan seng, namun terdapat durasi optimal untuk mencapai kekuatan adhesi maksimal sebesar MPa. Penelitian ini memberikan acuan teknis dalam optimalisasi parameter HDG untuk meningkatkan keandalan sistem proteksi korosi pada infrastruktur laut.
====================================================================================================================================
The duplex coating system, combining hot-dip galvanizing (HDG) and epoxy coating, is a premier corrosion protection method for steel structures in aggressive offshore environments. This system provides synergistic protection through the cathodic mechanism of the zinc layer and the barrier effect of the organic coating. However, the performance of a duplex system is critically dependent on the adhesion quality at the galvanized-epoxy interface. This study aims to analyze the effect of HDG immersion time variations (5, 7, and 9 minutes) on the pull-off adhesion strength of a duplex system applied to ASTM A36 carbon steel, following NORSOK M-501 standards. The galvanizing process adhered to ISO 1461, while adhesion performance was evaluated using the pull-off method per ASTM D4541. Supporting parameters, including zinc layer thickness (DFT) and surface profile, were also measured. The results indicate that while increased immersion time leads to higher zinc thickness, the optimal adhesion strength of MPa was achieved at the minute interval. This research provides technical references for optimizing HDG parameters to enhance the reliability of corrosion protection systems in heavy industrial and offshore applications.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Hot-Dip Galvanizing, Duplex Coating, Pull-Off Adhesion, NORSOK M-501, ASTM A36
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1665 Offshore structures--Materials. T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures T Technology > TJ Mechanical engineering and machinery > TJ561 Surface
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Razan Cahyohartoto
Date Deposited:	21 Jul 2026 06:50
Last Modified:	21 Jul 2026 06:50
URI:	http://repository.its.ac.id/id/eprint/136118

Actions (login required)

View Item