Pengaruh Ketebalan Lapisan Zinc Pada Pipa Galvanized Iron Terhadap Fenomena White Rust PT Spindo Unit 6.

Ssidharta, Firza Pratama (2025) Pengaruh Ketebalan Lapisan Zinc Pada Pipa Galvanized Iron Terhadap Fenomena White Rust PT Spindo Unit 6. Project Report. [s.n.]. (Unpublished)

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Abstract

Magang industri dilaksanakan di PT. Steel Pipe Industry of Indonesia Tbk. Unit 6 pada Departemen Quality Assurance/Quality Control (QA/QC) selama periode Januari–Mei 2025. Kegiatan ini bertujuan untuk memahami proses produksi pipa baja, sistem pengendalian kualitas, serta menganalisis pengaruh ketebalan lapisan zinc terhadap fenomena white rust pada pipa Galvanized Iron (GI). Penelitian dilakukan melalui metode observasi lapangan, studi literatur, wawancara dengan pihak terkait, serta pengumpulan dan analisis data hasil pengujian. Fenomena white rust merupakan bentuk korosi yang terjadi pada lapisan seng (zinc) akibat paparan kelembapan tinggi dan sirkulasi udara yang kurang baik selama proses penyimpanan maupun distribusi. Analisis ketebalan lapisan zinc dilakukan menggunakan metode pengujian tidak langsung berdasarkan standar JIS H 0401 melalui pengukuran kehilangan massa setelah pelarutan lapisan galvanis dengan asam klorida. Hasil pengujian menunjukkan massa lapisan zinc sebesar 111 g/m² pada spesimen uji. Hasil analisis menunjukkan bahwa semakin tebal lapisan zinc, semakin tinggi kemampuan perlindungan terhadap korosi sehingga intensitas kemunculan white rust dapat diminimalkan. Selain ketebalan lapisan zinc, faktor lain yang memengaruhi kemunculan white rust meliputi kelembapan lingkungan, sirkulasi udara yang kurang baik, serta kerusakan pada lapisan pelindung. PT. SPINDO Unit 6 menerapkan beberapa upaya pencegahan, antara lain pencelupan pipa menggunakan Rust Preventive Oil (RPO), penyimpanan pada lingkungan yang kering dan memiliki sirkulasi udara yang baik, inspeksi berkala dengan metode sampling, serta penerapan sistem First In First Out (FIFO). Berdasarkan hasil pengamatan selama magang, white rust hanya menyerang lapisan zinc dan tidak menurunkan kekuatan mekanis material dasar (base material). Oleh karena itu, pengendalian ketebalan lapisan zinc dan penerapan prosedur penyimpanan yang tepat menjadi faktor penting dalam menjaga kualitas pipa Galvanized Iron serta meminimalkan potensi kerusakan produk.
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his industrial internship was conducted at PT Steel Pipe Industry of Indonesia Tbk. (PT SPINDO) Unit 6 in the Quality Assurance/Quality Control (QA/QC) Department from January to May 2025. The internship aimed to understand the steel pipe manufacturing process, quality control procedures, and to analyze the effect of zinc coating thickness on the occurrence of white rust in Galvanized Iron (GI) pipes. The study employed field observations, literature reviews, interviews with company personnel, and analysis of testing data obtained during the internship. White rust is a form of corrosion that develops on galvanized steel surfaces due to the reaction between the zinc coating and moisture, particularly under conditions of high humidity and inadequate air circulation during storage or transportation. The zinc coating thickness was evaluated using the indirect testing method specified in JIS H 0401, which determines coating mass by measuring the weight loss after dissolving the galvanized layer with hydrochloric acid. The test results indicated a zinc coating mass of 111 g/m² for the tested specimen. The analysis demonstrated that thicker zinc coatings provide greater corrosion resistance, thereby reducing the likelihood of white rust formation. In addition to coating thickness, environmental humidity, poor ventilation, and mechanical damage to the zinc layer were identified as significant factors contributing to the occurrence of white rust. To minimize the formation of white rust, PT SPINDO Unit 6 implements several preventive measures, including immersion of galvanized pipes in Rust Preventive Oil (RPO), storage in dry and well-ventilated environments, periodic inspections using a sampling method, and the application of the First In, First Out (FIFO) inventory system. Based on the internship observations, white rust affects only the zinc coating and does not reduce the mechanical strength of the base material. Therefore, maintaining an adequate zinc coating thickness and implementing proper storage procedures are essential to ensuring the quality, durability, and corrosion resistance of Galvanized Iron pipes.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	Galvanized Iron, White Rust, Zinc Coating, Corrosion, Quality Control, Galvanized Iron, White Rust, Lapisan Zinc, Korosi, Quality Control.
Subjects:	T Technology > TS Manufactures > TS156 Quality Control. QFD. Taguchi methods (Quality control) T Technology > TS Manufactures > TS320 Steel--Metallurgy.
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Firza Pratama Ssidharta
Date Deposited:	08 Jul 2026 06:35
Last Modified:	08 Jul 2026 11:46
URI:	http://repository.its.ac.id/id/eprint/134269

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