Open AccessCorrosion resistance of sol-gel ZrO2 coatings deposited on stainless steel
Author(s) -
I. Stambolova,
O. Dimitrov,
Мaria Shipochka,
St. Yordanov,
V. Blaskov,
Stanislav V. Vassilev,
Bojidar Jivov,
Silviya Simeonova,
Konstantin Balashev,
Nikolay A. Grozev,
L. Lakov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1492/1/012025
Subject(s) - materials science , corrosion , x ray photoelectron spectroscopy , contact angle , wetting , metallurgy , monoclinic crystal system , cubic zirconia , conversion coating , composite material , chemical engineering , crystal structure , ceramic , crystallography , chemistry , engineering
Corrosion-resistant ZrO 2 coatings were deposited on stainless steel plates using organic (A) and inorganic (B) Zr precursors containing polyethylene glycol as structure directing agent. The dipping-drying cycles were repeated five times; the coatings were then treated at 500 °C. The samples were studied by atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and by automated contact-angle goniometry. The corrosion resistance of the ZrO 2 coatings were examined in NaCl and artificial sea water. The XRD analyses revealed a crystallized monoclinic ZrO 2 phase. The AFM observation proved that after the corrosion attack the surface had no signs of corrosion (scratches or cracks). The A and B coatings had corrosion rates of 4×10 −5 and 2×10 −4 g/m 2 h, respectively. The A coatings possessed a fine grained structure and a lower wettability (contact angle of 107°) and a lower oxygen content than the B coatings, which determined their better corrosion properties in both corrosive media.