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Al 2 O 3 –TiO 2 composite coatings with enhanced anticorrosion properties for 316L stainless steel
Author(s) -
Dai Jiamin,
Yang Jiaqi,
Zhuge Lanjian,
Wu Xuemei
Publication year - 2020
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201911449
Subject(s) - materials science , x ray photoelectron spectroscopy , composite number , corrosion , scanning electron microscope , contact angle , coating , electrochemistry , metallurgy , layer (electronics) , sputter deposition , chloride , chemical engineering , composite material , sputtering , thin film , nanotechnology , electrode , chemistry , engineering
316L stainless steel is used as an important structural material in various industries. However, its service life is limited in the presence of chloride ions due to severe chemical corrosion. Herein, a facile radiofrequency magnetron sputtering process is reported for the synthesis of various Al 2 O 3 –TiO 2 composite coatings as an anticorrosion layer for 316L stainless steel substrates. The enhanced chemical stability of Al 2 O 3 –TiO 2 composite coatings was investigated by X‐ray photoelectron spectroscopy, electron paramagnetic resonance, and X‐ray diffraction measurements. Moreover, the high specific surface area of Al 2 O 3 –TiO 2 composite coatings displayed better hydrophobic property which can be confirmed by scanning electron microscopy and contact angle measurements. Finally, the direct characterization of anticorrosion properties was carried out using electrochemical tests. All of the above results exhibited the enhanced anticorrosion properties of Al 2 O 3 coating after the incorporation of TiO 2 . Significantly, the Al 2 O 3 –TiO 2 composite coatings with 15.56% Ti content provided the best corrosion resistance for 316L stainless steel.