The Corrosion Enhancement due to Plasma Post-Oxidation Subsequent to Plasma Nitriding of a Steel AISI 4140

• Authors: A. Muñoz-Castro , A. de la Piedad-Beneitez , R. Valencia-Alvarado , R. López-Callejas , A. Mercado-Cabrera , R. Peña-Eguiluz , B. Rodriguez-Mendez
• Languages of publication: EN

Abstracts

EN

The corrosion enhancement due to plasma post-oxidation subsequent to plasma nitriding of the samples of low alloy annealed steel AISI 4140 was evaluated. The plasma nitriding was carried out at ≈570°C for 1-3 h in an atmosphere of 75% H₂ and 25% N₂. After this process post-oxidation at ≈450°C in a gas mixture, air and dry air-like was conducted for an hour. The treated samples were characterized using the XRD, SEM, AFM, potentiodynamic polarization and Vickers microhardness tests. The outcome of combined processes showed the presence of ε and γ' nitrided phases in the inner compound layer and in the outer one mostly of magnetite phase and barely visible of hematite one without using H₂ in the post-oxidation process. Also in these processes, the corrosion potential proved to be lower in the treated specimens than the untreated ones, and the corrosion current decreased up to one order of magnitude when treated in environment air and air-like ambient.

Keywords

EN

52.77.-j; 52.40.Hf; 81.40.-z; 81.65.-b; 81.65.Mq

Discipline

• 52.77.-j: Plasma applications
• 81.65.-b: Surface treatments(for surface preparation and lithography in microelectronics, see 85.40.-e)
• 52.40.Hf: Plasma-material interactions; boundary layer effects
• 81.40.-z: Treatment of materials and its effects on microstructure, nanostructure, and properties
• 81.65.Mq: Oxidation(see also 64.75.Lm Phase separation and segregation in oxidation)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 5
• Pages: 824-827

Dates

published

2015-11

Contributors

author

A. Muñoz-Castro

• Instituto Nacional de Investigaciones Nucleares, Plasma Physics Laboratory, AP 18-1027, CP 11801, Mexico D.F., Mexico

author

A. de la Piedad-Beneitez

• Instituto Tecnológico de Toluca, Av. Tecnológico S/N, AP 890, Toluca, Mexico

author

R. Valencia-Alvarado

• Instituto Nacional de Investigaciones Nucleares, Plasma Physics Laboratory, AP 18-1027, CP 11801, Mexico D.F., Mexico

author

R. López-Callejas

• Instituto Nacional de Investigaciones Nucleares, Plasma Physics Laboratory, AP 18-1027, CP 11801, Mexico D.F., Mexico
• Instituto Tecnológico de Toluca, Av. Tecnológico S/N, AP 890, Toluca, Mexico

author

A. Mercado-Cabrera

• Instituto Nacional de Investigaciones Nucleares, Plasma Physics Laboratory, AP 18-1027, CP 11801, Mexico D.F., Mexico

author

R. Peña-Eguiluz

• Instituto Nacional de Investigaciones Nucleares, Plasma Physics Laboratory, AP 18-1027, CP 11801, Mexico D.F., Mexico

author

B. Rodriguez-Mendez

• Instituto Nacional de Investigaciones Nucleares, Plasma Physics Laboratory, AP 18-1027, CP 11801, Mexico D.F., Mexico

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Identifiers

DOI

10.12693/APhysPolA.128.824