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All Journal JURNAL HUTAN LESTARI ROTOR: JURNAL ILMIAH TEKNIK MESIN
Adi Purnomo
Alumni Mahasiswa Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
Agriculture, Biological Sciences & Forestry Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH VARIASI KONSENTRASI INHIBITOR EKSTRAK KULIT BUAH KAKAO TERHADAP LAJU KOROSI PIPA BAJA KARBON A53 PADA MEDIA AIR LAUT Purnomo, Adi; Sumarji, Sumarji
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

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Abstract

Corrosion is a chemical phenomenon that occurs in metal materials in a wide variety of environmental conditions. always good corrosion causing losses losses that are directly or indirectly impacted. one way of corrosion prevention is the addition of corrosion inhibitors. Corrosion inhibitor is a substance that is added to the medium to prevent or reduce the rate of corrosion of metals in the environment . In this study , the authors make use of a corrosion inhibitor cocoa peel extract from the rind of the results of maceration with the variation of the cocoa peel extract concentration was 0 ppm , 500 ppm , 1000 ppm , 1500 ppm and 2000 ppm in sea water media using specimens of carbon steel pipe A53,The purpose of this study was to determine the effect of variations in the concentration of cocoa peel extract against corrosion rate and efficiency of inhibitors that occur in the carbon steel pipe A53 and analysis form macroscopic and microscopic corrosion that occurs in the specimen by using a camera and test equipment microscope with 200x magnification. From the results of this study concluded that there are significant variations in the concentration of the tea leaf extract against corrosion rate of carbon steel pipe A53. At 2000 ppm concentration variation, occurred average value of the lowest rate of corrosion inhibitor that is 0,2384 mdd and highest efficiency 83.37 %.
PENGARUH VARIASI KONSENTRASI INHIBITOR EKSTRAK KULIT BUAH KAKAO TERHADAP LAJU KOROSI PIPA BAJA KARBON A53 PADA MEDIA AIR LAUT Purnomo, Adi; Sumarji, Sumarji
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (320.347 KB)

Abstract

Corrosion is a chemical phenomenon that occurs in metal materials in a wide variety of environmental conditions. always good corrosion causing losses losses that are directly or indirectly impacted. one way of corrosion prevention is the addition of corrosion inhibitors. Corrosion inhibitor is a substance that is added to the medium to prevent or reduce the rate of corrosion of metals in the environment . In this study , the authors make use of a corrosion inhibitor cocoa peel extract from the rind of the results of maceration with the variation of the cocoa peel extract concentration was 0 ppm , 500 ppm , 1000 ppm , 1500 ppm and 2000 ppm in sea water media using specimens of carbon steel pipe A53,The purpose of this study was to determine the effect of variations in the concentration of cocoa peel extract against corrosion rate and efficiency of inhibitors that occur in the carbon steel pipe A53 and analysis form macroscopic and microscopic corrosion that occurs in the specimen by using a camera and test equipment microscope with 200x magnification. From the results of this study concluded that there are significant variations in the concentration of the tea leaf extract against corrosion rate of carbon steel pipe A53. At 2000 ppm concentration variation, occurred average value of the lowest rate of corrosion inhibitor that is 0,2384 mdd and highest efficiency 83.37 %.
SEBARAN PESUT (Orcaella brevirostris) DI PERAIRAN KABUPATEN KUBU RAYA DAN DI PERAIRAN KABUPATEN KAYONG UTARA PROVINSI KALIMANTAN BARAT Purnomo, Adi; Rifanjani, Slamet; Wahdina, .
JURNAL HUTAN LESTARI Vol 5, No 1 (2017): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v5i1.18418

Abstract

Porpoises or freshwater dolphins (Orcaella brevirostris), of Delphinidae family and is a kind of marine mammals. Porpoises are one of oceanic dolphins biota but this group can live in the sea, brackish or fresh water. This species distributed in the shallow waters of tropical and subtropical Indo-Pacific from northern Australia waters, Papua New Guniea, to the Bengal Bay, especially in Brahmaputra and Ganges of India River waters, mekong in Vietnam, Laos and Cambodia, the Mahakam River in East Kalimantan and Ayeyarwady river in Myanmar. This study is aimed to determine the distribution of the dolphins (Orcaella brevirostris) in the waters kubu raya district and waterways Kayong utara districts. This study uses survey / observation method, population observation method using cruising with a ship. The survey results were the discovery of the dolphins numbered 13 tails and are in three different groups. The first group was found in simpang lidah area. Kubu Raya district 9 tails, the second group was found in Paket 3 (Batu Ping). Kayong Utara District 2 tails and a third group in bumbun estuaries. Kubu Raya District 2 tails. Keyword: District Kubu Raya, District Kayong Utara Waters. Pesut (Orcaella brevirostris)
Co-Authors Adam Prayogo Kuncoro Kusuma, Bagus Adhi Sumarji Wahdina, .