✦ LIBER ✦
Evaluation of the corrosion resistance of different galvanized steels treated in a cerium salt solution
✍ Scribed by Y.-K. Song; F. Mansfeld
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- German
- Weight
- 334 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0947-5117
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✦ Synopsis
Analysis of polarization curves and impedance spectra has shown that the surface chemistry of galvanized steels plays an important role in determining their corrosion behavior. Zn-Ni samples that were untreated or had been treated in a 10 mM Ce(NO 3 ) 3 solution had the lowest corrosion rates in 0.5 N NaCl. The efficiency of the surface modification process was the highest for electrogalvanized steel. Surface analysis showed that the protective layers on Zn-Ni and electrogalvanized steel contained mainly cerium oxides/hydroxides, while the layer on hot-dipped steel consisted mainly of zinc hydroxide.