Microstructural and Mechanical Properties of Modificated Precipitation Hardening Steel 17-7ph After Modification Heat Treatment

Fakić, Belma; Burić, Adisa; Ćubela, Diana

doi:10.21474/ijar01/10375

Cited by 2 publications

(1 citation statement)

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“…Recent investigations on PHSS have focused on hydrogen diffusion, fatigue behavior, and microstructural characterization [36][37][38][39][40][41][42][43][44][45]. Samaniego et al [46] studied the corrosion behavior of CUSTOM450 and AM350 passivated PHSS steels using electrochemical noise and electrochemical impedance spectroscopy in acid baths.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Passivated Martensitic and Semi-Austenitic Precipitation Hardening Stainless Steel

Almeraya-Calderón

Samaniego-Gámez

Maldonado-Bandala

et al. 2022

Metals

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This research aimed to conduct a passive layer state study on martensitic and semi-austenitic precipitation hardening stainless steels (PHSS) passivated in citric acid and nitric acid baths at 49 and 70 °C for 50 and 75 min and subsequently exposed in 5 wt.% NaCl and 1 wt.% H2SO4 solutions. Corrosion behavior of the passivated material was observed by using potentiodynamic polarization (PP) according to the ASTM G5-11 standard. The microstructural analysis was performed by optical microscopy and scanning electron microscopy (SEM), while the passivated layer was characterized by X-ray photoelectron spectroscopy (XPS). The results indicated that the semi-austenitic-NA-50 min-70 °C sample showed the best corrosion resistance behavior in both solutions. The XPS characterization confirmed that the martensitic and semi-austenitic surface film presented a mixture of chemical compounds, such as Cr2O3 and Fe(OH)O, respectively.

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