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All Journal INTEK: Jurnal Penelitian Jurnal Pengabdian Kepada Masyarakat
Nurchajat, Nurchajat
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Computer Science & IT Economics, Econometrics & Finance Engineering Languange, Linguistic, Communication & Media Social Sciences Other

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The Hardness of Aluminum Oxide Surface in Anodized Coloring Under Low Voltage Buwono, Haris Puspito; Hadi, Syamsul; Muzaki, Mochamad; Subagiyo, Subagiyo; Agustriyana, Lisa; Hadi, Samsul; Nurchajat, Nurchajat
INTEK: Jurnal Penelitian Vol 6 No 2 (2019): October 2019
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (367.08 KB) | DOI: 10.31963/intek.v6i2.1522

Abstract

Coloring of aluminum oxide on the Aluminum type AA1100, which is the typical type for household appliances and purposes, through anodizing coloring process by the blue color of commercial printer ink had been successfully performed. The blue color was well adhered and was not easy to be removed by physical treatment such as wiping. The anodize coloring process includes chemical cleaning of aluminum surface, the formation of pores in the sulfuric acid solution at a specific current and a specified duration of time, coloring and closing the pores via sealing. It also shows the anodizing process increases aluminum oxide surface hardness increased by applying higher current density, and longer duration time of the process. The aluminum oxide hardness was in harmony to the duration of time processing, and current density; however, not in line to a concentration of the solution. The maximum hardness of the aluminum oxide layer obtained is 50 kg/mm2. The relation of current density and voltage, the effect of current density and sulfuric acid concentration toward aluminum oxide hardness were analyzed. Moreover, the difference of aluminum oxide hardness of the front side and backside to cathode also discussed.
DESAIN DAN PEMBUATAN KURSI AYUNAN UNTUK POS PENDIDIKAN ANAK USIA DINI Hadi, Syamsul; Zainuri, Ach. Muhib; Nurhadi, Nurhadi; Nurchajat, Nurchajat; Purwoko, Purwoko
Jurnal Pengabdian kepada Masyarakat Vol. 12 No. 2 (2025): JURNAL PENGABDIAN KEPADA MASYARAKAT 2025
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/abdimas.v12i2.9114

Abstract

Early childhood education of Melati Bangsa has only static arcades that still restrict the creativity of children in play as a limitation encountered. The purpose of community service is to facilitate children early age (less than 5 years) in order to build a game together in an exciting atmosphere in the swing chairs capacity of 6 children who are facing each other. Teachers or parents/guardians have responsibility of overseeing and swinging the swing chairs that can be accompanied by the providing of learning through the accompaniment of an interesting story, so learning can be more effective and achieve goals. Methods of community service include: survey with teachers and principal, the availability of areas for installation of swing chairs, design of swing chairs in accordance with the size of the students also anticipate the possiblility that must be strong if it is used by 4 adults, manufacturing swing chairs, painted steel construction and wood, mounting frame and chairs, foundation construction, and testing the chairs and installation of a chain lock. Results obtained in swing chair that can be used by 6 students and 1 teacher simultaneously while receiving lessons from teacher.
Co-Authors Haris Puspito Buwono Lisa Agustriyana Muzaki, Mochamad Nurhadi Purwoko Purwoko Samsul Hadi Subagiyo Subagiyo Syamsul Hadi Zainuri, Ach. Muhib