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All Journal TEKNIK JURNAL KIMIA SAINS DAN APLIKASI Reswara: Jurnal Pengabdian Kepada Masyarakat
Sri Hastuty
Mechanical Engineering Department, Universitas Pertamina, Jl. Teuku Nyak Arief, RT.7/RW.8, Simprug, Kec. Kby. Lama, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12220|Universitas Pertamina|Indonesia
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Pengaruh Perlakuan Panas Terhadap Struktur Mikro, Kekerasan dan Ketahanan Oksidasi Suhu Tinggi Pada Baja Tahan Karat Martensitik 13Cr3Mo3Ni-Cor Anwar, Moch Syaiful; Yulianto, Eric Jonathan; Chandra, Septian Adi; Hakim, Rahma Nisa; Hastuty, Sri; Mabruri, Efendi
TEKNIK Vol 40, No. 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (608.002 KB) | DOI: 10.14710/teknik.v40i1.23058

Abstract

This paper reports the effect of heat treatment on microstructure, hardness and high-temperature oxidation resistance of martensitic stainless steels13Cr3Mo3Ni-cast. The aim of this reseach is to increase quality of the steel through heat treatment process on microstructure, hardness and high-temperature oxidation resistance.  The steels samples were prepared by a process sequence ofinduction melting, casting, austenitisazed, single tempered and double tempered. Austenitization process of 1020°C was conducted until 4 hours and quench in water. Then, tempering process of 650°C was carried out until 2 hours and cooled in the air and then double tempering process of 550°C was carried out until 2 hours and air cooled. The double tempered steels were subjected to microstructure, hardness and high-temperature oxidation test of 400 – 700 °C. Then, the experimental results of double tempered steel were compared with control, austenitisazed and single tempered steels. The double tempered treatment revealed a positive effect on the increament properties of martensitic stainless steel 13Cr3Mo3Ni-cast    in the high-temperature environment.
PENERAPAN TEKNOLOGI PIROLISIS DALAM PENGOLAHAN SAMPAH PLASTIK DI BANK SAMPAH SENI BARU, JAKARTA SELATAN Nona Merry Merpati Mitan; M M Sari; Sri Hastuty; Rahmad G.N; Ayu S.F; Rizqi Alifia N.A; Mazaya A.R.S; Sava K.Z; Rofiah Rofiah; Gusti B.C; Azmi Z; Hilwa S.A; Vionna C.S
RESWARA: Jurnal Pengabdian Kepada Masyarakat Vol 3, No 1 (2022)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (585.286 KB) | DOI: 10.46576/rjpkm.v3i1.1612

Abstract

Sampah plastik menimbulkan permasalahan serius karena sulitnya terdegradasi oleh alam dan menimbulkan pencemaran pada lingkungan. Kehadiran Bank Sampah Seni Baru yang terletak di Kecamatan Kebayoran Baru, Jakarta Selatan, merupakan salah satu upaya mengurangi pembuangan sampah plastik. Hingga kini, Bank Sampah Seni Baru belum memiliki reaktor pengolahan sampah plastik khususnya reaktor pirolisis. Bank Sampah Seni Baru dalam operasional pengelolaannya melakukan pendekatan daur ulang sampah plastik kepada masyarakat sekitarnya melalui pemanfaatan sampah plastik menjadi bentuk kerajinan tangan dan lainnya. Tentu saja metode daur ulang ini pada suatu waktu akan menghadapi permasalahan yang sama karena hanya mengubah bentuk dari sampah plastik tersebut untuk sementara waktu. Atas dasar permasalahan ini, kegiatan ini bertujuan untuk memperkenalkan teknologi pirolisis sebagai bentuk daur ulang yang dapat mengubah sampah plastik menjadi fraksi cair yang memiliki sifat sebagai bahan bakar. Luaran dari kegiatan ini adalah menghasilkan reaktor pirolisis dan melakukan pelatihan teknis mengenai penggunaan reaktor pirolisis tersebut
Design, Fabrication, and Testing of Salt Spray as An Atmospheric Corrosion Test Tool Using MgCl₂ and NaCl Solutions Sri Hastuty; Darius Tegar Oktaviyanto; Fatwa Khoirrun Nadhor; Wahyu Caesarendra; Muhammad Awwaluddin
Jurnal Kimia Sains dan Aplikasi Vol 27, No 10 (2024): Volume 27 Issue 10 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.10.499-509

Abstract

The research aimed to design a salt spray chamber adhering to ASTM-B117 standards and test the chamber with determine the atmospheric corrosion rate in a salt spray chamber using steel materials (ST 37 and SS 304) in NaCl and MgCl2 solutions. Corrosion tests spanned 48 hours, with time variables of 4, 6, and 8 hours of wet and dry cycle for 48 hours total. The objective was to design salt spray chamber and test the chamber to compare the corrosion rate based on solution and material selected. Visual inspections post-corrosion included macro photos, microscopy, SEM, and EDS analyses. Weight loss in Steel ST 37, cleaned per ASTM G1 with HCl, was also assessed. Corrosion rates of Steel ST 37 varied marginally across time variables and solutions. NaCl corrosion rates at 4, 6, and 8 hours averaged 4.5232, 5.8418, and 6.7148 mmpy, respectively. For MgCl2, rates were 4.2564, 5.3436, and 6.0915 mmpy, respectively. Stainless steel exhibited higher resistance compared to Steel ST 37. In conclusion, both NaCl and MgCl2 solutions accelerate corrosion, with NaCl inducing a higher rate. Stainless steel outperforms Steel ST 37, and the chamber material displays resilience against atmospheric corrosion.
Co-Authors Anwar, Moch Syaiful Ayu S.F Azmi Z chandra, Septian Adi Darius Tegar Oktaviyanto Fatwa Khoirrun Nadhor Gusti B.C Hakim, Rahma Nisa Hilwa S.A M M Sari Mabruri, Efendi Mazaya A.R.S Mitan, Nona Merry Merpati Muhammad Awwaluddin Rahmad G.N Rizqi Alifia N.A Rofiah Rofiah Sava K.Z Vionna C.S Wahyu Caesarendra Yulianto, Eric Jonathan