Analisa Pengaruh Penerapan Coating dan Variasi Tekanan Pada Proses Sandblasting Terhadap Daya Rekat Adhesi dan Laju Korosi

Alifi, Daffa Usaid (2025) Analisa Pengaruh Penerapan Coating dan Variasi Tekanan Pada Proses Sandblasting Terhadap Daya Rekat Adhesi dan Laju Korosi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Korosi merupakan masalah yang signifikan dalam struktur logam, terutama pada lambung kapal. Guna melindungi material baja, pencegahan korosi dilakukan dengan proses pengecatan (coating). Keberhasilan pengecatan bergantung pada kebersihan permukaan material melalui proses sandblasting. Penelitian ini bertujuan menganalisis pengaruh penerapan coating dan variasi tekanan sandblasting terhadap daya rekat adhesi dan laju korosi baja ASTM A36. Metode penelitian menggunakan tekanan sandblasting 4, 5, 6, dan 7 bar dengan steel grit grit 40, dengan dua lapisan coating (primer dan topcoat), serta pengujian kekasaran, ketebalan lapisan, adhesi (pull-off test), dan laju korosi menggunakan metode weight loss dan larutan HCl 32% sebagai media korosi. Hasil penelitian menunjukkan bahwa nilai kekasaran tertinggi diperoleh pada tekanan 7 bar sebesar 89,67 µm, sedangkan terendah pada 4 bar sebesar 64,33 µm. Nilai kekuatan adhesi tertinggi tercatat pada tekanan 7 bar sebesar 12,41 MPa, sedangkan terendah pada 4 bar sebesar 7,99 MPa. Laju korosi spesimen tanpa coating memili hasil paling tinggi dibandingkan dengan spesimen yang sudah dicoating. Temuan ini memberikan kontribusi bagi industri maritim dalam menentukan parameter optimal sandblasting dan coating untuk perlindungan struktur logam, memperpanjang umur material, dan mengurangi biaya perawatan.
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Corrosion is a significant problem in metal structures, especially in ship hulls. To protect steel materials, corrosion prevention is carried out by a painting process (coating). The success of the painting depends on the cleanliness of the material surface through the sandblasting process. This study aims to analyze the effect of coating application and variations in sandblasting pressure on the adhesion strength and corrosion rate of ASTM A36 steel. The research method uses sandblasting pressures of 4, 5, 6, and 7 bar with steel grit 40, with two layers of coating (primer and topcoat), as well as testing the roughness, layer thickness, adhesion (pull-off test), and corrosion rate using the Weight Loss method and 32% HCl solution as a corrosion medium. The results showed that the highest roughness value was obtained at a pressure of 7 bar of 89.67 µm, while the lowest at 4 bar of 64.33 µm. The highest adhesion strength value was recorded at a pressure of 7 bar of 12.41 MPa, while the lowest at 4 bar of 7.99 MPa. The corrosion rate of uncoated specimens was higher than that of coated specimens. These findings contribute to the maritime industry's ability to determine optimal sandblasting and coating parameters to protect metal structures, extend material life, and reduce maintenance costs.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Sandblasting, Coating, Adhesi, Laju korosi, ASTM A36
Subjects:	T Technology > T Technology (General) T Technology > TS Manufactures > TS320 Steel--Metallurgy.
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Daffa Usaid Alifi
Date Deposited:	30 Jul 2025 04:02
Last Modified:	30 Jul 2025 04:02
URI:	http://repository.its.ac.id/id/eprint/124055

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