Al rich PVD protective coatings: A promising approach to prevent T91 steel corrosion in stagnant liquid lead

In order to investigate a protective coating approach for nuclear applications, two different aluminum rich layers were deposited on T91 steel coupons: Ti-Al-N films were grown via High Power Impulse Magnetron Sputtering and AlO coatings were produced by Radio Frequency Magnetron Sputtering. In this...

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Bibliographic Details
Published in:Surface & coatings technology Vol. 377; p. 124890
Main Authors: Miorin, Enrico, Montagner, Francesco, Zin, Valentina, Giuranno, Donatella, Ricci, Enrica, Pedroni, Matteo, Spampinato, Valentina, Vassallo, Espedito, Deambrosis, Silvia Maria
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 15.11.2019
Elsevier BV
Subjects:
Aluminum
Aluminum oxide
Corrosion tests
Heat resistant steels
Heavy liquid metals corrosion protection
High power impulse magnetron sputtering (HiPIMS)
Liquid lead
Magnetron sputtering
Martensitic stainless steels
Oxide coatings
Protective coatings
Radio frequency magnetron sputtering (RFMS)
Sputtered films
Substrates
Titanium
Titanium aluminum nitride
Titanium aluminum nitride
Sputtered films
High power impulse magnetron sputtering (HiPIMS)
Radio frequency magnetron sputtering (RFMS)
Heavy liquid metals corrosion protection
Aluminum oxide
ISSN:0257-8972, 1879-3347
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Summary:In order to investigate a protective coating approach for nuclear applications, two different aluminum rich layers were deposited on T91 steel coupons: Ti-Al-N films were grown via High Power Impulse Magnetron Sputtering and AlO coatings were produced by Radio Frequency Magnetron Sputtering. In this exploratory work, coated specimens were corrosion tested in stagnant Pb at 550 °C for 1200 h and both types of coatings proved to be effective in protecting the substrate from the harsh environment. Due to the severe experimental conditions, the Al oxide film underwent some mechanical changes, while, the nitride coating demonstrated its noteworthy stability. [Display omitted] •Assessment of Al-rich coatings potentiality against liquid lead corrosion of steel•Aluminum Oxide and Titanium Aluminum Nitride coatings by magnetron sputtering•Coated and bare samples are exposed to severe liquid lead corrosive attack.•Aluminum-rich coatings are effective in protecting steel from corrosion.•Nitride coatings maintain their excellent mechanical properties unchanged.
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ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2019.124890