Corrosion and Erosion Analysis of AlCrN/CrN Multilayered Coating Applied by Cathodic Arc Physical Vapor Deposition (PVD)

• Published in: Protection of metals and physical chemistry of surfaces Vol. 58; no. 3; pp. 623 - 632
• Main Authors: Borghei, Sina, Torbati-Sarraf, Hamidreza
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2022; Springer Nature B.V
• Subjects: Arc deposition; Cathodic coating (process); Characterization and Evaluation of Materials; Chemistry and Materials Science; Coating; Corrosion and Coatings; Corrosion currents; Corrosion resistance; Corrosion tests; Electrode polarization; Erosion resistance; Field emission microscopy; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials Science; Metallic Materials; Microhardness; Physical vapor deposition; Physicochemical Problems of Materials Protection; Precipitation hardening steels; Room temperature; Scratch tests; Stainless steels; Substrates; Surface roughness; Tribology; Water drops; physical vapor deposition (PVD); electrochemical corrosion; multilayered coating; AlCrN/CrN; water droplet erosion
• ISSN: 2070-2051; 2070-206X
• DOI: 10.1134/S2070205122030030

A multilayered AlCrN/CrN coating was applied on stainless steel C-450 precipitation hardened stainless steel by cathodic arc vapor deposition method. The microstructure of the coating was characterized using field emission scanning electron microscope (FE-SEM). Microhardness and surface roughness (
R
a
) measurements revealed 2900 HV and 0.8 µm for the coating, respectively. Coating delamination occurred at 48 N applied force in scratch test. The corrosion performance of the coating was compared with the substrate in a 3.5 wt % NaCl solution at room temperature using polarization and electrochemical impedance measurements. Applying multilayered AlCrN/CrN coating enhanced the passive film and reduced the corrosion current density by 78%. Water droplet erosion resistance of AlCrN/CrN coating was evaluated, and the eroded volume equation was formulated as a function of impact numbers.