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All Journal TEKNIK Teknologi Indonesia Metalurgi Piston: Journal of Technical Engineering Jurnal Litbang Polri Jurnal Sains Materi Indonesia
Gadang Priyotomo
Research Center for Metallurgy and Material, Indonesian Institute of Sciences, Serpong, Tangerang
Aerospace Engineering Computer Science & IT Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Journal : Piston: Journal of Technical Engineering

 1 
The Effect of Chloride Ions for Corrosion Resistance of C276 Material in NaCl Solution Priyotomo, Gadang; Anam, Ahsonul
Piston: Journal of Technical Engineering Vol. 8 No. 1 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i1.48481

Abstract

Hastealloy-C276 is an austenitic nickel-molybdenum-chromium alloy with small amounts of tungsten added. This material is quite familiar and is used in various industrial components. However, this alloy, like other types, is very susceptible to corrosion due to the influence of chloride ions in solution. The corrosion resistance of steel alloy materials was investigated using electrochemical methods including open circuit potential (OCP), Anodic Potentiodyamic (AP) with and Tafel in NaCl solution media. The test parameters carried out were chloride concentration (0.001 M-1M) and pH (2, 7 and 10) values. The test results show that an increase in chloride ion concentration causes a decrease in the OCP value in a negative direction, which indicates a tendency for decreasing of the corrosion resistance for C276. The AP test results show that the pitting potential (Epit) value slowly decreases as the chloride ion concentration increases up to 1 M. On the other hand, the role of pH is very important in changing the corrosion resistance performance. A decrease in pH to 2 causes an increase in the corrosion rate of the material, whereas an increase in pH causes this decrease.
The Influence of Chloride Ion Concentration and Short Immersion Time on the Corrosion Behavior of C11000 Copper Alloy Priyotomo, Gadang; Anam, Ahsonul; Maldini, Noviar Rizky
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48881

Abstract

The effect of various chloride ion concentration (0 %, 1 %, 2 %, 3%, 4% and 5 % NaCl solution) on the corrosion behavior of the C1100 copper alloy was investigated with the immersion test (weight loss method). The effect of various immersion periods was also examined up to 14 days. After conducting immersion test, metal surfaces were observed with an optical microscope and the SEM analysis. The product of corroded copper was characterized using Energy Dispersive Analysis of X-rays (EDAX). On the basis of results, the magnitude of corrosion rate is higher in increasing the chloride concentration and immersion period, respectively. The increase of chloride concentration causes the copper oxide layer to become porous and cracked compared to without chloride addition. The reduction in the integrity of the copper protective layer took place due the presence of chloride ion.
Co-Authors Ahmadi, Rapli Nur ahsonul anam Astawa, I Nyoman Gede Putrayasa Astuti, Septi Fachry Abda El Rahman Hadi Gunawan, Hadi Harsisto, Harsisto Heri Nugraha Irawan, Januar J.W. Soedarsono Maldini, Noviar Rizky Nasoetion, Ronald Nikitasari, Arini Nuraini, Lutviasari Nuraini, Lutviasari Prifiharni, Siska Raslin, Harvin Rini Riastuti, Rini Rokhmanto, Fendy Royani, Ahmad Saragih, Agung Shamsudin Soesaptri Oediyani Sundjono, Sundjono Triwardono, Joko Wahyono, Ary