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  • 1
    Electronic Resource
    Electronic Resource
    Sol-gel ZrO2 coatings for chemical protection of stainless steel (1994)
    Springer
    Journal of sol gel science and technology 1 (1994), S. 177-184 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel coatings ; chemical protection ; stainless steel ; ZrO2 ; corrosion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract ZrO2 coatings deposited on 316 L stainless steel sheets were synthesized by sol-gel method using Zr(OC3H7)4 as precursor and isopropanol, glacial acetic acid, and water as solvents for application with ultrasounds. Different solutions for dip-coating were prepared with compositions varying between 0.025 and 0.9 mol/dm3 of ZrO2. X-ray diffraction shows that the films densified at 800°C are crystalline with a tetragonal structure. The thickness of the coatings varied from 0.35–0.75 μm. The influence of the ZrO2 coatings on the corrosion behavior of stainless steel substrates in aqueous NaCl was studied through potentiodynamic polarization curves at 1 mV/s. The values of the electrochemical parameters allow for an explanation of the role of the films in the increased resistance of steel against corrosion in moderately aggressive environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00490247
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Sol-gel coatings for chemical protection of stainless steel (1994)
    Springer
    Journal of sol gel science and technology 2 (1994), S. 529-534 
    Details
    ISSN: 1573-4846
    Keywords: thin film ; ZrO2 ; SiO2 ; SiO2-TiO2 ; SiO2-Al2O3 ; corrosion protection ; stainless steel 316L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Sol-gel thin coatings of ZrO2, SiO2, 70SiO2-30TiO2 and 88SiO2-12Al2O3 compositions (mole %) have been prepared from sonocatalyzed sols and deposited by dip-coating technique on 316L stainless steel foils. The influence of the coatings on the chemical corrosion of the substrate has been measured through potentiodynamic polarization curves in aqueous 15% H2SO4 solution between 25 and 50°C. The values of the corrosion potential, polarization resistance and corrosion rate have been determined. Analysis of the data combined with scanning electron microscopy studies indicate that the films act as a geometric blocking against exposure to the corrosive media and increase the lifetime of the substrate up to a factor 8.5.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486303
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    Paper (German National Licenses)
    Fulltext
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