Ditemukan 6 dokumen yang sesuai dengan query
Andhika Tri Prabowo
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Kurang efisiennya pengeringan biji kopi dengan menggunakan sinar matahari membuat produktifitas para petani kopi di Indonesia kurang maksimal. Maka dari itu penelitian ini dilakukan untuk membuat sistem pengeringan yang lebih optimum yaitu dengan cara mengkombinasikan sistem pengeringan jenis bed drying dengan sistem refrigerasi double condensor sebagai dehumidifier. Pengujian dilakukan dengan buah kopi yang sudah dikupas dengan variasi pengujian laju aliran, temperatur dan kelembaban udara pengering. Hasil yang diperoleh dari penelitian ini adalah karakterisasi pengeringan biji ...
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Depok: Fakultas Teknik Universitas Indonesia, 2022
S-pdf
UI - Skripsi Membership Universitas Indonesia Library
S. Divakara Shetty
"
Inhibition is one of the
mechanisms used for mitigating the metallic corrosion, particularly in an acid environment. The present work aims to
investigate the
inhibiting effect of N-benzyl-N/-phenyl thiourea (BPTU) on the
corrosion of low carbon steel in a 0.1 M hydrochloric acid (HCl) solution using a Tafel
extrapolation and linear polarization techniques. The study reveals that BPTU
acts as an excellent anodic inhibitor for low carbon steel in a HCl
solution. The protective efficiency of the compound was found to be ...
"
2016
J-Pdf
Artikel Jurnal Universitas Indonesia Library
S. Divakara Shetty
"
Inhibition is one of the mechanisms used for mitigating the metallic corrosion, particularly in an acid environment. The present work aims to investigate the inhibiting effect of N-benzyl-N/-phenyl thiourea (BPTU) on the corrosion of low carbon steel in a 0.1 M hydrochloric acid (HCl) solution using a Tafel extrapolation and linear polarization techniques. The study reveals that BPTU acts as an excellent anodic inhibitor for low carbon steel in a HCl solution. The protective efficiency ...
"
Depok: Faculty of Engineering, Universitas Indonesia, 2016
UI-IJTECH 7:5 (2016)
Artikel Jurnal Universitas Indonesia Library
Gidion Turu’allo
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Ground granulated blast furnace slag (ggbs) is a waste material generated from iron production, and is one of the cementitious materials that can be used to replace part of the cement in concrete. The aim of this research was to determine the effects of the water-binder ratios and levels of ggbs in concrete, with regard to the activation energy, which is needed for predicting the concrete’s strength. A number of mixtures with different water-binder ratios ...
"
Depok: Faculty of Engineering, Universitas Indonesia, 2015
UI-IJTECH 6:5 (2015)
Artikel Jurnal Universitas Indonesia Library
S. Divakara Shetty
"
Since inhibition is the simplest mechanism used for mitigating the corrosion of metals and alloys, particularly in acidic environments, the present work aims to investigate the inhibiting effect of N-benzyl-N?-phenyl thiourea (BPTU) and N-cyclohexyl-N?-phenyl thiourea (CPTU) on mild steel corrosion in 0.1M HCl medium using the Tafel extrapolation technique. Tafel experiments were conducted with ±250 mV vs. rest potential (RP) in steps of 20 mV from the cathodic side for recording the corrosion currents, and ...
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Depok: Faculty of Engineering, Universitas Indonesia, 2017
UI-IJTECH 8:5 (2017)
Artikel Jurnal Universitas Indonesia Library
Diwangkoro Kingkin
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Mampu bentuk (formability) material bukan hanya ditentukan oleh mikrostruktur dari material, temperatur, laju regangan (strain rate) dan regangan (strain), tetapi juga tahapan tegangan pada zona deformasi. Uji tarik panas merupakan salah satu metode pengujian yang dilakukan untuk mengevaluasi sifat mekanis dari material, memperoleh informasi plastisitas material dan sifat perpatahan (fracture). Pengujian dilakukan dengan menggunakan parameter dari persamaan konstitutif dimana tegangan alir merupakan fungsi dari regangan, laju regangan dan temperatur. Hal ini dapat menjelaskan karakteristik Rheologi ...
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Depok: Fakultas Teknik Universitas Indonesia, 2011
S694
UI - Skripsi Open Universitas Indonesia Library
