Pitting corrosion-Preferred chloride diffusion pathways in physical vapor deposited AlCrN coatings

Hudak OE, Bahr A, Kutrowatz P, Wojcik T, Bohrn F, Solyom L, Schuster R, Shang L, Hunold O, Polcik P, Heller M, Felfer P, Ball G, Riedl H (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Corrosion Science Elsevier

Book Volume: 211

DOI: 10.1016/j.corsci.2022.110901

Abstract

Pitting corrosion of sputtered and arc evaportaed fcc-AlCrN coated low-alloy steel substrates was studied in a 0.1 M NaCl solution, using a three-electrode-cell. Depending on the deposition technique, several diffusion mechanisms were identified by high-resolution techniques (i.e. APT, TOF-SIMS). For arc evaporated AlCrN, incoherently embedded macro-particles provided the majority of fast-track diffusion pathways and pit-initiation sites, while their pristine coating matrix proved protective against chloride inward diffusion. Contrarily, the more coarse-grained sputtered AlCrN morphology with a highly orientated crystal growth featured diffusion paths along column boundaries, where chloride permeated the coating structure and initiated pit formations at the coating-substrate interface.

Authors with CRIS profile

Martina Heller Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Peter Felfer Professur für Atom Probe Tomography

Involved external institutions

Technische Universität Wien / Vienna University of Technology AT Austria (AT) Oerlikon Balzers Ltd. LI Liechtenstein (LI) Plansee Composite Materials GmbH DE Germany (DE)

How to cite

APA:

Hudak, O.E., Bahr, A., Kutrowatz, P., Wojcik, T., Bohrn, F., Solyom, L.,... Riedl, H. (2023). Pitting corrosion-Preferred chloride diffusion pathways in physical vapor deposited AlCrN coatings. Corrosion Science, 211. https://dx.doi.org/10.1016/j.corsci.2022.110901

MLA:

Hudak, O. E., et al. "Pitting corrosion-Preferred chloride diffusion pathways in physical vapor deposited AlCrN coatings." Corrosion Science 211 (2023).

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