Effects of sol-gel coatings on the localized corrosion behavior of 304 stainless steel

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837589· OSTI ID:509387

Trzaskoma-Paulette, P P; Nazeri, A ^[1]

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1. Naval Research Lab., Washington, DC (United States)

The corrosion behavior of ceria/titania coated 304 stainless steel (304 SS) was studied by anodic polarization measurements in 0.05 N NaCl. Coatings were prepared by sol-gel methods, were approximately 0.5 {micro}m thick and bonded well to the substrate. The as-received stainless steel suffers sensitization at the coating cure temperature of 900 C and a 500 mV decrease in pitting potential results. When the coating is present, however, despite sensitization of the substrate, the pitting potential is about the same as for the as-received stainless steel. The latter result indicates that the coating does protect the underlying metal from pitting corrosion. Following polarization, coated samples show significantly fewer pits than as-received stainless steel and resist crevice attack.

• Sponsoring Organization: Office of Naval Research, Washington, DC (United States)
• OSTI ID: 509387
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 144; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM OXIDES
CORROSION PROTECTION
PITTING CORROSION
PROTECTIVE COATINGS
SODIUM CHLORIDES
SOL-GEL PROCESS
STAINLESS STEEL-304
TITANIUM OXIDES