Improved corrosion resistance of cathodic arc evaporated Al0.7Cr0.3−xVxN coatings in NaCl-rich media

Hudak, O.E.; Kutrowatz, Philip; Wójcik, Tomasz; Ntemou, E.; Primetzhofer, Daniel; Shang, Lunlin; Ramm, J.; Hunold, O.; Kolozsvári, S.; Polcik, P.; Riedl, H.

doi:10.1016/j.corsci.2023.111376

Cited by 4 publications

(1 citation statement)

References 32 publications

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“…In contrast, physical vapor deposition (PVD) coatings, such as those deposited by cathodic arc evaporation (CAE) [14][15][16], sputtering, balanced magnetron sputtering (BMS), unbalanced magnetron sputtering (UBMS), and high-power impulse magnetron sputtering (HiPIMS) [17,18], among others, are rarely used in highly corrosion-aggressive environments such as the conditions found in offshore oil exploration. Direct application of PVD coatings on carbon or low-alloy steels presents limitations, including a low thickness (often less than 5 µm) that increases the risk of a coating system failure and epitaxial growth, which allows corrosion media to permeate into the coating and reach the steel substrate [17,19].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Behavior of Nitrided AISI/SAE 4340 Steel Coated with NiP and AlCrN

Soares,

He,

DePaiva

et al. 2024

Lubricants

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In this study, novel surface engineering strategies to improve the wear performance of AISI 4340 were investigated. The strategies were as follows: (i) NiP deposition on a previously nitrided steel substrate, followed by NiP interdiffusion heat treatment at either 400 °C or 610 °C (referred to as duplex treatment); (ii) the deposition of AlCrN PVD coating on NiP layers on a previously nitrided steel substrate (referred to as triplex treatment). Prior to the deposition of AlCrN, the NiP was subjected to the interdiffusion heat treatment at either 400 °C or 610 °C. These strategies were compared with the performance of the AlCrN coating directly applied on nitrided steel. To characterize the microstructural features of each layer, X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS) analysis were conducted. We also carried out mechanical and tribological behavior assessments. The tribological tests were carried out using a ball-on-disc tribometer under a constant load of 20 N and a tangential speed of 25 cm/s; cemented carbide spheres with a diameter of 6 mm were the counterpart body. The friction coefficient was continuously monitored throughout the tests. The results reveal that the wear mechanism for the AlCrN coating is predominantly oxidative. The most wear-resistant surface architecture was the one comprising AlCrN over the NiP layer subjected to interdiffusion heat treatment at either 400 °C or 610 °C.

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