Sol-gel coatings doped with organosilane and cerium to improve the properties of hot-dip galvanized steel
Journal
Corrosion Science
Journal Volume
102
Pages
63-71
Date Issued
2016
Author(s)
Abstract
An inorganic sol-gel coating and an inorganic/organic hybrid sol-gel coating without and with cerium nitrate were made on hot-dip galvanized steel via a roll coating process. Results showed that the corrosion resistance of the hot-dip galvanized steel was improved with the inorganic coating; however, cracks were present in the coating. Cracks were effectively eliminated and paintability of the sol-gel coating was enhanced while doped with organic precursor. The corrosion resistance and self-healing capability were further enhanced when cerium cation was doped. Finally, the corrosion protection mechanism of the various coatings was discussed in detail.
Type
journal article