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Efendi Mabruri
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THE EFFECT OF SURFACE ROUGHNESS AND STIRRING SPEED ON THE COATING CHARACTERISTICS OF MARTENSITIC ELECTROLESS Ni-P Rafi Dwi R; Arini Nikitasari; Sunardi Sunardi; Efendi Mabruri
Widyariset Vol 4, No 1 (2018): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (648.408 KB) | DOI: 10.14203/widyariset.4.1.2018.21-28

Abstract

Coating process of martensitic stainless steel 420 (SS 420) as the base material component of the steam turbine blade component uses an Electroless Ni-P coating process. This process is one of the solution coatingsthat applied to stainless steel as a substrate to improve corrosion resistance.The goal of this research is to get an idea and information about the effect of surface roughness and stirring speed on the characteristics of Electroless Ni-P layer. Experimental parameters in this research were variations of 0.044 μm, 0.056 μm, 0.101 μm, and 0.164 μm surface roughness and variations of 4.9 rpm, 11.3 rpm, and 21.3 rpm stirring speed. Results showed that the surface roughness and low stiring speed causes the grain distribution becomes more uniform, whichis shown by Scanning Electron Microscopy (SEM) examination. Adhesion layer also increases along with increasing levels of surface roughness. The highest value of adhesion was 1.9 MPa at 0.164 μm and the lowest value of adhesion was 0.8 MPa at 0,044 μm.
THE EFFECT OF SURFACE ROUGHNESS AND STIRRING SPEED ON THE COATING CHARACTERISTICS OF MARTENSITIC ELECTROLESS Ni-P Rafi Dwi R; Arini Nikitasari; Sunardi Sunardi; Efendi Mabruri
Widyariset Vol 4, No 1 (2018): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.4.1.2018.21-28

Abstract

Coating process of martensitic stainless steel 420 (SS 420) as the base material component of the steam turbine blade component uses an Electroless Ni-P coating process. This process is one of the solution coatingsthat applied to stainless steel as a substrate to improve corrosion resistance.The goal of this research is to get an idea and information about the effect of surface roughness and stirring speed on the characteristics of Electroless Ni-P layer. Experimental parameters in this research were variations of 0.044 μm, 0.056 μm, 0.101 μm, and 0.164 μm surface roughness and variations of 4.9 rpm, 11.3 rpm, and 21.3 rpm stirring speed. Results showed that the surface roughness and low stiring speed causes the grain distribution becomes more uniform, whichis shown by Scanning Electron Microscopy (SEM) examination. Adhesion layer also increases along with increasing levels of surface roughness. The highest value of adhesion was 1.9 MPa at 0.164 μm and the lowest value of adhesion was 0.8 MPa at 0,044 μm.
KARAKTERISTIK LAPISAN HOT DIP ALUMINIZING PADA BAJA TAHAN KARAT MARTENSITIK 13Cr Moch. Syaiful Anwar; Mikhael Kevin; Alfirano Alfirano; Efendi Mabruri
Metalurgi Vol 34, No 3 (2019): Metalurgi Vol. 34 No. 3 Desember 2019
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (407.301 KB) | DOI: 10.14203/metalurgi.v34i3.462

Abstract

Pada material aplikasi suhu tinggi, pelapisan permukaan merupakan hal penting dalam memberikan ketahanan oksidasi dan korosi temperatur tinggi, ketahanan erosi dan abrasi.Hot dip Aluminizing merupakan metode alternatif pelapisan yang dapat digunakan, karena lebih murah daripada PVD dan paduan Co. Perlakuan permukaan, komposisi lelehan Al dan Al – Si, dan parameter proses seperti temperatur dan waktu pencelupan berpengaruh terhadap komposisi intermetalik dan struktur mikronya. Baja dilapisi lelehan Al murni, Al – 5% Si, Al - 11% Si, dan Al – 15% Si pada temperature dan waktu celup yang brvariasi. Si memberikan pengaruh terhadap perubahan morfologi antara substrat dengan interface intermetalik dan mencegah kemungkinan terjadinya stress konsentrasi akibat morfologi finger-like. Pada waktu pencelupan yang sama sebesar 3 menit dari 4 variasi komposisi coating yang berbeda, ketebalan lapisan coating terbesar adalah sampel Al – 15% Si dengan temperature 800oC, sedangkan ketebalan lapisan intermetalik terbesar adalah sampel Al murni dengan temperatur 861oC dengan nilai ketebalan masing-masing sebesar 480µm dan 46,8 µm.
Co-Authors Alfirano Alfirano Arini Nikitasari Mikhael Kevin Moch. Syaiful Anwar Rafi Dwi R