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Author Nikitasari, Arini ♦ Mabruri, Efendi
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CONCENTRATION RATIO ♦ CORROSION ♦ HARDNESS ♦ HEAT TREATMENTS ♦ HYPOPHOSPHOROUS ACID ♦ MARTENSITIC STEELS ♦ MELTING POINTS ♦ NICKEL ♦ NICKEL SULFATES ♦ PHOSPHORUS ♦ PLATING ♦ SCANNING ELECTRON MICROSCOPY ♦ SODIUM TUNGSTATES ♦ STAINLESS STEELS ♦ SUBSTRATES ♦ SULFURIC ACID ♦ TENSILE PROPERTIES ♦ THERMAL EXPANSION ♦ TUNGSTEN ♦ WEAR RESISTANCE
Abstract Electroless nickel phospor (Ni-P) is widely used in many industries due to their corrosion and wear resistance, coating uniformity, and ability to coat non-conductive surfaces. The unique properties of tungsten such as high hardness, higher melting point, lower coefficient of linear thermal expansion, and high tensile strength have created a lot of interest in developing ternary Ni-W-P alloys. This article presents the study of electroless Ni-W-P alloys coating using acid or alkaline bath on martensitic stainless steel. Nickel sulfate and sodium tungstate were used as nickel and tungsten sources, respectively, and sodium hypophosphite was used as a reducing agent. Acid or alkaline bath refer to bath pH condition was adjusted by adding sulfuric acid. Martensitic stainless steel was immersed in Ni-W-P bath for 15, 30, and 60 minutes. The substrate of martensitic stainless steel was subjected to pre-treatment (polishing and cleaning) and activation prior to electroless plating. The plating characteristics were investigated for concentration ratio of nickel and hypophosphite (1:3), sodium tungstate concentration 0,1 M, immersion time (15 min, 30 min, 60 min), and bath condition (acid, alkaline). The electroless Ni-W-P plating was heat treated at 400°C for 1 hour. Deposits were characterized using scanning electron microscope (SEM) and corrosion measurement system (CMS).
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-04-19
Publisher Place United States
Volume Number 1725
Issue Number 1


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