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All Journal Jurnal Teknoin Jurnal Sains Materi Indonesia IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Journal of Innovation and Applied Technology Martabe : Jurnal Pengabdian Kepada Masyarakat International Journal of Industrial Research and Applied Engineering Jurnal Kedaymas Prosiding Seminar Nasional Program Pengabdian Masyarakat Sewagati
Rohmannudin, Tubagus Noor
Institut Teknologi Sepuluh Nopember
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences

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Effect of Halide Concentration on the Effectiveness of Banana Peel Waste Inhibitor at 60C Widodo, Mochamad Puji; Tua Silaen, Yohannes Marudut; Ahada Kuswara, Muhammad Faiq Ridho; Rohmannudin, Tubagus Noor
IPTEK The Journal for Technology and Science Vol 30, No 2 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (592.972 KB) | DOI: 10.12962/j20882033.v30i2.5000

Abstract

Organic inhibitors have been widely studying to be an alternative corrosion prevention because of its abundance and non-hazardous effect to the environment. One of organic inhibitors which is obtained from plant extract is banana (Musa Paradisica) peel, because it has gallocatechin which is a strong antioxidant. Otherwise, inhibition effectiveness from organic compound decreases during increasing of temperature. However, the addition of other substance like halide ion has provided multiple effect of corrosion inhibitor effectiveness. The addition of the halide ions can enhanced the inhibition efficiency of the organic inhibitors. This research highlights the effect of additional halide concentration to the inhibition effectiveness of Musa Paradisica (banana) peel on API 5 L steel in 3,5% NaCl at temperature 600C. This inhibition performance is investigated using weight loss measurement and electrochemical measurement. Result shows that the maximum inhibition efficiency was observed with the mixture of 500 ppm banana peel waaste extract and 100 ppm potassium iodide at 600C. Also, The blends behaved as mixed type inhibitor. The effectiveness was found to be in order of KI > KBr due to the larger ionic radius in iodide ion.
Study of Organic Substance (Myrmecodia pendans) Extraction Using Soxhletation Method as an Organic Inhibitor Rohmannudin, Tubagus Noor; Sulistijono, Sulistijono; Adiyaksa, Muhammad; Chusururi, Mochamad Alvan Mifta
IPTEK Journal of Proceedings Series No 4 (2018): The 3rd International Conference On Materials and Metallurgical Engineering and Technol
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2018i4.3848

Abstract

Extract of natural substance is currently being developed as an organic inhibitor. Organic inhibitor can be used to inhibit corrosion rate of metallic material especially steel. The purpose of this study is to analyze the effectiveness of soxhletation extraction methods and the quality of inhibitor of Sarang Semut (Myrmecodia pendans) extract. The variations implemented in this research were the composition of the solvent-material and the content comparison of flavonoid compounds.  The results of Sarang Semut (Myrmecodia pendans) extract inhibitor using soxhletation extraction method was observed qualitatively and quantitatively This research used soxhletation extraction method, simplicia Sarang Semut (Myrmecodia pendans) powder as the organic substance, and a mixture of acetone and distilled water as the solvent. Ratio variation of the solvent-substance composition used are 1:10, 1:15, and 1:20. Tests used in this study were Extract Parameters, FTIR, TLC and UV-Vis Spectrophotometry and weight loss. The highest yield was shown when using 1:10 ratio which was 13.943%, the total ash content and the lowest extracted water content shown at a ratio of 1:10 with amount of 4.26% and 4.2483%. FTIR test results indicated functional groups of flavonoids compounds and TLC test showed positive results of Flavonoid compounds which were characterized by blackish discoloration. The highest percentage of flavonoid compounds of 0.22025% found at the 1:10 ratio. The highest efficiency inhibition happened when weight loss testing showed 500ppm with the result of 84.3%.
PENGARUH KONDISI TANAH ASAM DAN CACAT GORES BERBENTUK PERSEGI PANJANG PADA LAPIS LINDUNG TERHADAP KEBUTUHAN ARUS PROTEKSI SISTEM IMPRESSED CURRENT CATHODIC PROTECTION (ICCP) DENGAN MENGGUNAKAN BAJA AISI 1045 Tubagus Noor Rohmannudin; Sulistijono Sulistijono; Faris Putra Ardiansyah
Teknoin Vol. 21 No. 1 (2015)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/.v21i1.3696

Abstract

Corrosion is degradation of the metal due to an oxidation reaction between the metal with many substances that exist in the environment around them and form undesirable compounds. Corrosion can not be prevented, but still can be controlled its speed. One of the corrosion control process in a material can be used a  coating and cathodic protection by providing a forced flow. At this time the research conducted will learn about the effect of the rectangular scratch defect and the acid soil pH to the needs of current protection in the impressed current cathodic protection system (ICCP). The variation of given scratch is rectangular with each area of 10 mm2, 50 mm2, 100 mm2, 150 mm2, 250 mm2 and 500 mm2. While the differences in soil pH use is pH 3, pH 5, and pH 7. Then there is also a specimen without scratch and without layers of protection that is used as a comparison. In the ICCP system installation, AISI 1045 steel is used as the cathode and graphite as the anode. The system used a rectifier that is useful for current rectifier. The flow of the ICCP protection is set such that the value of the potential difference can reach -850 mV against the reference electrode Cu / CuSO4. Measurement of the current protection on the ICCP system performed during the 7 days with daily data retrieval. After obtained the measurement of the current protection value, showed that the greatest current protection value with 500 mm2 defect area in acidic soils (pH 3) that is equal to 1.696 mA. While the smallest current protection in area of 10 mm2 with normal soil that is equal to 0.032 mA. The influence of these two variables were calculated using multiple regression statistical analysis so as to get the equation Y = 0,11 + 0,008 X1 + 0,0004 X2. Where the value of X1 as soil pH conditions, X2 as scratch defect, and Y as current protection.
PENGARUH KADAR AIR DAN JENIS TANAH TERHADAP PENYEDIAAN ARUS SISTEM IMPRESSED CURRENT CATHODIC PROTECTION UNTUK PROTEKSI KOROSI PIPA BAJA Tubagus Noor Rohmannudin; Sulistijono Sulistijono; Arini Arini
Jurnal Sains Materi Indonesia Vol 18, No 2: JANUARI 2017
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (466.448 KB) | DOI: 10.17146/jsmi.2017.18.2.4163

Abstract

PENGARUH KADAR AIR DAN JENIS TANAH TERHADAP PENYEDIAAN ARUS SISTEM IMPRESSED CURRENT CATHODIC PROTECTION UNTUK PROTEKSI KOROSI PIPA BAJA. Faktor lingkungan yang menjadi salah satu indikator utama terhadap korosi pada tanah adalah resistivitas dan kadar air tanah. Tujuan penelitian adalah untuk menganalisis pengaruh resistivitas dan kadar air tanah terhadap kebutuhan arus proteksi sistem ICCP pada material pipa API 5L Grade B sebagai katoda yang yang diberi variasi coating (coating seluruhnya, tanpa coating dan cacat gores berbentuk persegi dengan luas 500 mm2). Variasi kadar air adalah 0%(kondisi kering) dan 25%. Anoda menggunakan grafit, rectifiernya sebagai penyearah arus dan elektroda referensi Cu/CuSO4 sebagai elektroda acuan. Pengukuran arus proteksi ini dilakukan selama 7 hari dengan pengambilan data setiap hari. Dari hasil penelitian terlihat bahwa dengan bertambahnya kadar air dalam tanah akan menyebabkan nilai resistivitas tanah menurun, karena bertambahnya jumlah air dalam tanah akan mempermudah aliran arus. Nilai resistivitas tanah yang semakin tinggi akan membutuhkan arus proteksi yang rendah karena pada tanah dengan nilai resistivitas tinggi memiliki tahanan yang tinggi (lemah menghantar listrik atau bersifat isolator). Sedangkan dengan kadar air tanah yang tinggi nilai arus proteksi semakin meningkat karena air mempermudah ionisasi elektron dalam tanah sehingga mempermudah aliran arus
Kelor Leaf Extraction As Organic Inhibitor Of Steel In Seawater Training To Increase Competence Luqman Al-Hakim Surabaya High School Teachers And Students. Tubagus Noor Rohmannudin; Agung Purniawan; Moh. Farid; Fakhreza Abdul; Zaid Sulaiman; Sulistijono Sulistijono
Journal of Innovation and Applied Technology Vol 6, No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Materials Engineering Department held the training as a public service program with participants coming from Teachers and Students of Luqman Al-Hakim Surabaya High School. This training was held at the Materials Engineering Department. The training method used was the presentation of material by the Team, followed by experiments in the Laboratory. These results indicate an increase in the competency, insight and understanding of Luqman Al-Hakim High School Teachers and Students regarding the process of Kelor leaves as an organic inhibitor.
Scratch Area Effect in Coating to Protection Current Needing in ICCP System for AISI 1045 Steel in Sea Water Environment Dewanti Dewanti; Tubagus Noor Rohmannudin; Sigit Tri Wicaksono
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.288

Abstract

Every metal always going back to its oxide form. Steel which are oxidized having lower quality than steel which are not. Oxidizing steel will going faster if it is placed in corrosive environment. Sea water is one of the environment that support the oxidizing process. Coats are using to protect the steel in sea water. But sometimes there is some failure in coating process so the coat will have scratch damage area. The objective of this experiment is to know how much current needed to protect AISI 1045 steel which have been coated with polyethylene and given scratch area with shape variations, in sea water environment. This experiments is the continuation from the past experiences which is using sacrifice anode, on the other hand, this experiences using Impressed Current Cathodic Protection. Data which are taken from this experiment is the differentiation of potential that measured with electrode reference Cu/CuSO4, and the current measured by avometer. With ICCP system, we know that the corrosion rate in rectangular-shape scratch is faster than circle-shape scratch, and the larger the area of scratch, the larger current needed to protect the coated steel.
PENGELOLAAN AIR BERSIH DENGAN METODE FISIKA DAN KIMIA PADA SMA LUQMAN AL-HAKIM Tubagus Noor Rohmannudin; Lukman Noerochim; Budi Agung Kurniawan; Hariyati Purwaningsih; Zaid Sulaiman; Sulistijono Sulistijono
Prosiding Seminar Nasional Program Pengabdian Masyarakat 2020: 6. Kinerja Kelembagan Sosial Masyarakat dalam Pengelolaan Lingkungan dan Penanganan Bencana
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (659.804 KB) | DOI: 10.18196/ppm.36.320

Abstract

Kondisi air yang keruh di kawasan Surabaya utara mengakibatkan masyarakatnya tidak bisa menggunakan air tersebut untuk keperluan sehari-hari. Kondisi ini disebabkan karena Surabaya utara merupakan kawasan dekat pantai, adanya pencemaran dari limbah industri dan limbah rumah tangga. Sehingga diperlukan teknologi pengolahan air bersih untuk mengolah air tanah menjadi air bersih. Metode pelatihan yang digunakan adalah presentasi materi dan demostrasi pengolahan air bersih. Untuk mengetahui kompetensi peserta pelatihan dilakukan ujian pretest dan postest. Hasil pelatihan ini menunjukan adanya peningkatan kompetensi, wawasan dan pemahaman Guru dan Siswa SMA Luqman Al-Hakim mengenai proses pengolahan air bersih, hal ini dibuktikan dengan peningkatan nilai dari ujian Pretest dan Postest.
Analysis on the Effectiveness of Extract Mixture of Anthouse Plant (Myrmecodia Pendans) and Red Pepper Vine (Piper Ornatum) as a Green Corrosion Inhibitor on the Corrosion Rate of API 5L Grade B Steel in H2SO4 1M Solution Tubagus Noor Rohmannudin; Agung Purniawan; Sulistijono -; Bintang Ayu Nuraeni
International Journal of Industrial Research and Applied Engineering Vol 3, No 1 (2018)
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.219 KB) | DOI: 10.9744/jirae.3.1.7-13

Abstract

The analysis of the mixture of anthouse plant (Myrmecodia pendans) and red pepper vine (Piper ornatum) in H2SO4 1M solution had been studied by weight loss, Electrochemical Impedance Spectroscopy (EIS), Fourier-Transform Infrared Spectroscopy (FTIR), and Spectrometer test. The Myrmecodia pendans and Piper ornatum were chosen because they contain antioxidants that can inhibit the corrosion rate. The specimen used in this study was API 5L Grade B steel in H2SO4 1M solution. The compositions used in this study were 100% MP : 0% PO, 75% MP : 25% PO, 50% MP : 50% PO, 25% MP : 75% PO, and 0% MP : 100% PO (MP: Myrmecodia pendans, PO: Piper ornatum). FTIR testing result shows that a passive layer was formed by O, H, and N bonds. The weight loss method shows that the highest efficiency of 52.43% was achieved by 50% MP : 50% PO mix composition. Polarization testing shows that the corrosion rate decreased drastically with the addition of 50% MP : 50% PO mix composition, i.e., from 36.32 mpy to 7.93 mpy, due to the passive layer formed on the steel surface. EIS results show the presence of resistance solution (Rs), charge transfer resistance (Rct), and CPE. The adsorption free energy value of the mixture of Myrmecodia pendans and Piper ornatum was −10.02 kJ/mol and it was a physical adsorption.
UPAYA SERTIFIKASI HALAL PRODUK UMKM UNTUK MEMPERMUDAH KEWIRAUSAHAAN MANDIRI Tubagus Noor Rohmannudin; Sulistijono Sulistijono; Diah Susanti; Fakhreza Abdul; Haniffudin Nurdiansyah; Mavindra Ramadhani
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Publisher : Jurnal KeDayMas: Kemitraan dan Pemberdayaan Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14414/kedaymas.v2i2.3068

Abstract

Kegiatan ini dilaksanakan dengan latar belakang untuk mendorong perkembangan dan pertumbuhan ekonomi Indonesia terutama pengembangan ekonomi syariah di tingkat nasional, dan untuk membantu dan mempermudah kewirausahaan mandiri atau UMKM untuk menjual produknya dan meningkatkan ekonominya sesuai masterplan ekonomi Syariah Indonesia. Kegiatan ini dilaksanakan dengan awal-awal mengikuti pelatihan sertifikasi halal yang diadakan oleh ITS Tekno Sains. Sertifikasi halal dilakukan bertahap dengan kontak UMKM masing-masing yang bertotalkan 3 UMKM yaitu Sinom Mbok Na, Pisang Monyet, Keripik Melinjo Yes dari dibantu pembuatan NPWP, NIB, pengajuan izin pengedaran BPOM dan terakhir sertifikasi halal.
PELAYANAN PENGUJIAN PIPA HDPE UNTUK APLIKASI SALURAN AIR BAWAH TANAH Tubagus Noor Rohmannudin; Sulistijono .; Budi Agung Kurniawan; Lukman Noerochiem; Willy Deviet Kusuma
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Publisher : Jurnal KeDayMas: Kemitraan dan Pemberdayaan Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14414/kedaymas.v3i1.3571

Abstract

The material chemistry laboratory is a laboratory which having facilities to provide teaching, research, and community dedication. One example of community dedication that the material chemistry laboratory does is by giving testing and research service to a certain institution. In this service, testing regarding HDPE pipe quality that will be applied for underground waterways is done. HDPE is a plastic material with flexible and impact-resistant properties. this material is commonly used in the industrial world, especially as a main material for pipes. In the pipe production process, good qualification of pipe is necessary. To determine the quality of the HDPE pipe, a hydrostatic pressure test, tensile test, and expansion test is done. after the testing, the result obtained for the hydrostatic pressure test is in good condition, and for the tensile test and expansion test the result is in accordance with the quality requirement of SNI 4829.2 : 2015.
Co-Authors Adiyaksa, Muhammad Agung Budi Kurniawan Agung Purniawan Ahada Kuswara, Muhammad Faiq Ridho Ardhyananta, Hosta Arini Arini Benedicta Dian Alfanda Bintang Ayu Nuraeni Chusururi, Mochamad Alvan Mifta Dewanti Dewanti Diah Susanti Elok Amaylia Swasthika Candra Fakhreza Abdul Faris Putra Ardiansyah George Endri Kusuma Haniffudin Nurdiansah Haniffudin Nurdiansyah Haniffudin Nurdiansyah Hariyati Purwaningsih Lukman Noerochiem Lukman Noerochim Mavindra Ramadhani Moh. Farid Sulistijono . Sulistijono Sulistijono Sulistijono Sulistijono Sungging Pintowantoro Tua Silaen, Yohannes Marudut Wicaksono, Sigit Tri Widodo, Mochamad Puji Willy Deviet Kusuma Yeny Widya Rakhmawati Yuli Setiyorini Zaid Sulaiman Zaid Sulaiman