<div class="csl-bib-body">
<div class="csl-entry">Hudak, O. E., Bahr, A. A. I., Kutrowatz, P., Wojcik, T., Bohrn, F., Solyom, L., Schuster, R., Shang, L., Hunold, O., Polcik, P., Heller, M., Felfer, P., Ball, G., & Riedl-Tragenreif, H. (2023). Pitting corrosion – Preferred chloride diffusion pathways in physical vapor deposited AlCrN coatings. <i>Corrosion Science</i>, <i>211</i>, Article 110901. https://doi.org/10.1016/j.corsci.2022.110901</div>
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dc.identifier.issn
0010-938X
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/139705
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dc.description.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.