scholarly journals Features of Ni-W Plating Film Obtained by the Jet-Flow System

AppliedChem ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 41-49
Author(s):  
Yuka Tsuruta ◽  
Yasushi Umeda ◽  
Hideo Honma ◽  
Osamu Takai ◽  
Katsuhiko Tashiro
Keyword(s):  
Corrosion Resistance ◽  
Current Density ◽  
Flow System ◽  
High Current Density ◽  
Jet Flow ◽  
High Corrosion Resistance ◽  
High Corrosion ◽  
Chromium Plating ◽  
Excellent Corrosion Resistance ◽  
Plating Method

Chromium plating has excellent corrosion resistance and is widely used in industry. However, it also has a high environmental load. As an alternative, electric Ni-W plating is attracting attention. However, it is not widely used because the stress is high and the film is prone to cracks. Furthermore, although it is necessary to thicken the film to improve the corrosion resistance, there are also problems that the current efficiency is low and the plating time is long. Therefore, we investigate a film with high corrosion resistance by using the jet-flow plating method that enables plating at a high current density. Our results show that the jet-flow plating enables plating of 50 µm, and high corrosion resistance is obtained by randomly generating fine cracks in the film at 20 A·dm−2. We also found that the stress changed depending on the current density and shape of the crack also changed.

High corrosion resistance Ni-reduced graphene oxide nanocomposite coating

2016 ◽  
Vol 34 (5-6) ◽  
pp. 305-312 ◽  
Author(s):  
Seyed Ali Hosseini Khorasani ◽  
Sohrab Sanjabi
Keyword(s):  
Corrosion Resistance ◽  
Graphene Oxide ◽  
Composite Coating ◽  
Current Density ◽  
Corrosion Current Density ◽  
Electrochemical Impedance ◽  
Corrosion Current ◽  
Nanocomposite Coating ◽  
High Corrosion Resistance ◽  
High Corrosion

AbstractThis paper presents a high corrosion resistance Ni-graphene composite coating fabricated by co-electrodeposition on Cu substrate. First, GO was synthesized by improved Hummers’ method, and then different concentrations of GO aqueous solution were introduced to Ni Watt’s bath. During electrodeposition, GO and Ni ions were reduced simultaneously to form composite coating. The phase structure and morphology were covered by X-ray diffraction and scanning electron microscopy analysis, respectively. Atomic force microscopy (AFM) was employed to identify the surface topography of the coatings. Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and electrochemical impedance spectroscopy (EIS) were used to study the synthesis of GO and its reduction during the plating process. Corrosion resistance of nanocomposite and that of pure Ni coating were compared by applying potentiodynamic polarization spectroscopy (PDS). The results showed that by increasing the amount of graphene oxide in solution, there has been a significant reduction in corrosion current density. As the EIS result showed, the high amount of GO reduction was obtained in GO concentration of 0.6 mg ml−1 and current density of 8 A dm−2. It is in a good agreement with data obtained from PDS. Analyses showed that the corrosion current density of corresponding coating was improved up to 0.2 μA cm−2, which means an improvement of about 100 times compared to pure Ni coating.

Chemical characteristics of the passive surface films formed on newly developed Cu–Zr–Ag–Al bulk metallic glasses

2008 ◽  
Vol 23 (8) ◽  
pp. 2091-2098 ◽  
Author(s):  
C.L. Qin ◽  
W. Zhang ◽  
Q.S. Zhang ◽  
K. Asami ◽  
A. Inoue
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glass ◽  
Current Density ◽  
Metallic Glasses ◽  
Surface Characteristics ◽  
Alkaline Solutions ◽  
Chemical Characteristics ◽  
Surface Films ◽  
High Corrosion Resistance ◽  
Excellent Corrosion Resistance

In this paper, we systematically demonstrate the corrosion behavior and surface characteristics of a newly developed Cu36Zr48Ag8Al8 bulk metallic glass (BMG). The Cu36Zr48Ag8Al8 BMG exhibits excellent corrosion resistance in acidic and alkaline solutions without Cl− ions. The alloy is spontaneously passivated with a markedly low current density in 1 N H2SO4 solution. The formation of the bilayered passive film of the present alloy immersed in 1 N H2SO4 solution, which is composed mostly of Zr4+ cations in the exterior part and Zr4+- and Al3+-enriched cations in the inner part, could be responsible for the high corrosion resistance.

BRIMCOLLOY

Alloy Digest ◽  
1971 ◽  
Vol 20 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
High Corrosion Resistance ◽  
Rolling Mills ◽  
High Corrosion ◽  
Copper Zinc

Abstract BRIMCOLLOY is a copper-zinc tin alloy having high strength, spring temper, superior conductivity and high corrosion resistance. It is produced in three grades: BRIMCOLLOY 100, BRIMCOLLOY 200, and BRIMCOLLOY 300. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-225. Producer or source: Bridgeport Rolling Mills Company.

HASTELLOY ALLOY F

Alloy Digest ◽  
1956 ◽  
Vol 5 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cold Working ◽  
Iron Alloy ◽  
Heat Treating ◽  
High Corrosion Resistance ◽  
High Corrosion ◽  
Nickel Chromium

Abstract HASTELLOY ALLOY-F is a nickel-chromium-molybdenum-iron alloy having high corrosion resistance and possessing satisfactory hot and cold working characteristics. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-30. Producer or source: Haynes Stellite Company.

UGI 209

Alloy Digest ◽  
2014 ◽  
Vol 63 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Magnetic Permeability ◽  
Heat Treating ◽  
High Corrosion Resistance ◽  
High Corrosion

Abstract UGI 209 is an austenitic stainless steel with high corrosion resistance and a low magnetic permeability. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-1192. Producer or source: Schmolz + Bickenbach USA Inc..

scholarly journals Structure and Corrosion Behavior of Sputter-Deposited W-Mo Alloys

1970 ◽  
Vol 21 ◽  
pp. 19-25 ◽  
Author(s):  
Jagadeesh Bhattarai
Keyword(s):  
Corrosion Resistance ◽  
Magnetron Sputtering ◽  
Corrosion Behavior ◽  
Solid Solutions ◽  
Chemical Society ◽  
High Corrosion Resistance ◽  
Corrosion Rates ◽  
High Corrosion ◽  
Sputter Deposited

Nanocrystalline, single bcc solid solutions of W-Mo alloys have been successfully prepared by D. C. magnetron sputtering in a wide composition. The corrosion behavior of the sputter-deposited W-Mo alloys was studied. The W-Mo alloys showed significantly high corrosion resistance in 12 M HCl at 30o C. Their corrosion rates are about one and half orders of magnitude lower than that of sputter-deposited tungsten and lower than that of the sputter-deposited molybdenum even after prolonged immersion.DOI: 10.3126/jncs.v21i0.217Journal of Nepal Chemical Society Vol.21 2006 pp.19-25

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