Effect of Plasma Nitriding on the Wear and Corrosion Properties of Hastelloy CW2M Alloy

Abstract Nowadays, the improvement of ferrous materials performance is a problem of high interest. One of well-known wear- and corrosion properties improving technique is plasma nitriding, in which elemental nitrogen is introduced to the surface of a metal part for subsequent diffusion into the material. As a result, a compound, “white” layer and a diffusion zone are formed at the detail’s surface. Most of the authors positively describe the effects of surface ion nitiding. On the other hand, there are also reports on adverse effects of direct current and pulsed direct current plasma nitriding on ferrous materials performance. Therefore, an attempt to provide comprehensive summary on direct current and pulsed direct current ion nitriding and its influence on ferrous materials’ mechanical and corrosion properties has been made. According to the results, some of the technique drawbacks are hard to avoid in mass production.

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Wear and corrosion properties of pure aluminum reinforced with (B4C + Spent Catalyst) composite

Materials Today Proceedings ◽

10.1016/j.matpr.2021.05.528 ◽

2021 ◽

Author(s):

P. Pragathi ◽

R. Elansezhian

Keyword(s):

Pure Aluminum ◽

Spent Catalyst ◽

Corrosion Properties ◽

Wear And Corrosion

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Effect of Plasma Nitriding Process Conditions on Corrosion Resistance of 440B Martensitic Stainless Steel

Acta Mechanica et Automatica ◽

10.2478/ama-2014-0028 ◽

2014 ◽

Vol 8 (3) ◽

pp. 156-159 ◽

Cited By ~ 1

Author(s):

Magdalena Łępicka ◽

Małgorzata Grądzka-Dahlke

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Degradation Products ◽

Plasma Nitriding ◽

Electrochemical Corrosion ◽

Industrial Applications ◽

Process Conditions ◽

Corrosion Properties ◽

Dental Instruments ◽

Increased Risk

Abstract Martensitic stainless steels are used in a large number of various industrial applications, e.g. molds for plastic injections and glass moldings, automotive components, cutting tools, surgical and dental instruments. The improvement of their tribological and corrosion properties is a problem of high interest especially in medical applications, where patient safety becomes a priority. The paper covers findings from plasma nitrided AISI 440B (PN-EN or DIN X90CrMoV18) stainless steel corrosion resistance studies. Conventionally heat treated and plasma nitrided in N2:H2 reaction gas mixture (50:50, 65:35 and 80:20, respectively) in two different temperature ranges (380 or 450°C) specimens groups were examined. Microscopic observations and electrochemical corrosion tests were performed using a variety of analytical techniques. As obtained findings show, plasma nitriding of AISI 440B stainless steel, regardless of the process temperature, results in reduction of corrosion current density. Nevertheless, applying thermo-chemical process which requires exceeding temperature of about 400°C is not recommended due to increased risk of steel sensitization to intergranular and stress corrosion. According to the results, material ion nitrided in 450°C underwent leaching corrosion processes, which led to significant disproportion in chemical composition of the corroded and corrosion-free areas. The authors suggest further research into corrosion process of plasma nitrided materials and its degradation products.

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Wear and Corrosion Properties of 316L-SiC Composite Coating Deposited by Cold Spray on Magnesium Alloy

Journal of Thermal Spray Technology ◽

10.1007/s11666-017-0583-0 ◽

2017 ◽

Vol 26 (6) ◽

pp. 1381-1392 ◽

Cited By ~ 4

Author(s):

Jie Chen ◽

Bing Ma ◽

Guang Liu ◽

Hui Song ◽

Jinming Wu ◽

...

Keyword(s):

Magnesium Alloy ◽

Composite Coating ◽

Cold Spray ◽

Corrosion Properties ◽

Wear And Corrosion

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Mechanical, tribological, and corrosion properties of composite NiP-Al2O3 with different amount of particles

Journal of Tribology ◽

10.1115/1.4051393 ◽

2021 ◽

pp. 1-32

Author(s):

Renato Pessoa ◽

Carlos A H Laurindo ◽

Michelle S Meruvia ◽

Ricardo D Torres ◽

Alexandre Mikowski ◽

...

Keyword(s):

Corrosion Resistance ◽

Al2o3 Particle ◽

Corrosion Properties ◽

Mechanical Stirring ◽

Wear And Corrosion ◽

Sample Orientation ◽

Aisi 4140 ◽

Al2o3 Particles ◽

Wear And Corrosion Resistance ◽

Number Of Particles

Abstract In this study, the influence of Al2O3 particle amounts on the mechanical, tribological, and corrosion properties of the composite NiP-Al2O3 coating was evaluated. AISI 4140 steel was coated with NiP through an autocatalytic bath with the addition of Al2O3 particles maintained in suspension by mechanical stirring. Following, the coated samples were annealed at 600 °C to increase the hardness and to create an interdiffusion layer, which improves coating adhesion and corrosion resistance. The coating surface was characterized by SEM/EDS, XRD, microhardness, wear resistance, and corrosion tests. The results showed that the coating particles' amount depends on the bath agitation speed, the sample orientation during the deposition, and the volume of Al2O3 particles in the bath composition. Also, the number of particles in the coating affects the deposition kinetics, the thickness of the interdiffusion layer, which affects the wear and corrosion resistance.

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