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All Journal Jurnal Sains dan Seni ITS Journal of Natural Sciences and Mathematics Research Jurnal Rekayasa Mesin Manutech : Jurnal Teknologi Manufaktur JURNAL CRANKSHAFT Jurnal Teknik Mesin Indonesia Piston: Journal of Technical Engineering International Journal of Applied Technology Research Aptekmas : Jurnal Pengabdian Kepada Masyarakat Industrial Research Workshop and National Seminar Abdimas Terapan: Jurnal Pengabdian Kepada Masyarakat Terapan
Devi Eka Septiyani Arifin
Jurusan Teknik Mesin, Politeknik Negeri Bandung
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Pengaruh waktu pelapisan back oxide terhadap ketahanan korosi dan sifat mekanik pada baja AISI 4340 Arifin, Devi Eka Septiyani; Alda Diva Meidina
Jurnal Teknik Mesin Indonesia Vol 21 No 1 (2026): April
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/jtmi2112026129

Abstract

Blackening, also known as Black Oxide coating, is a conversion coating method that forms a black oxide layer on the surface of steel used in industry to enhance corrosion resistance, aesthetics, and mechanical properties. This study aims to determine the effect of coating times (blackening) of 10 minutes, 30 minutes, and 60 minutes at a temperature of 140 °C on the corrosion resistance, tensile strength, and coating thickness of AISI 4340 steel. The results showed that the variations succeeded in forming a uniform black layer that adhered well to the surface, while good corrosion resistance was obtained at 30 minutes. The thickness of the layer formed was directly proportional to the coating time, increasing from 13.06 µm at 10 minutes to 18.55 µm at 60 minutes. In contrast, the tensile strength showed a different trend of results at 10 minutes, reaching the highest tensile strength of 1684 MPa; however, the tensile strength decreased at 30 minutes and 60 minutes. This decrease in tensile strength value was due to the number of hydrogen atoms formed during the dehydrogenation process. These atoms diffuse and become more entrapped in the steel's atomic structure with longer plating times. This difference in duration results in the dehydrogenation process having different rates of complete removal of trapped hydrogen atoms at each time interval, resulting in a decrease in tensile strength.
Co-Authors Adnan Rakhmadi Ramadhan Ajeng Ayu Milanti Alda Diva Meidina Aqil Murtadho Bintoro, Waluyo Musiono Budi Triyono Budi Triyono Defrianto Pratama Destri Muliastri Dewi, Yunita Citra Fitri Nur Indah Sari Hasanah, Rahmawati Heri Widiantoro Ilham Azmy Januar Nur Rohmah Suprihartini Lesmana, Prayoga Musyafak Musyafak Naufal Afif Pasya, Azdane Peprial Indika Prasetyo Prasetyo Prayadi, Aditya Anggara Riovano Putranto Rudi Rudiana Rudy Yuni W setiawan, Dibyo Slamet Sutjipto Sri Widarti Syafiq Ade Priyatama Tantan Sholahuddin Undiana Bambang Vania Tingting Sirenden Widiatmoko, Rudy Yuni Zainuddin Zainuddin Zainuri (DOI: 10.12962/j24604682.v12i2.1331), Mochamad Zen, Elfiah Fadhilah Zuhri, Muhammad Rizki