Corrosion inhibition of magnesium by combined zirconia silica sol-gel films.

Citation:

Tamar Y, Mandler D. Corrosion inhibition of magnesium by combined zirconia silica sol-gel films. Electrochim. ActaElectrochimica Acta. 2008;53 (16) :5118 - 5127.

Date Published:

2008///

Abstract:

The inhibition of Mg (AZ91D) corrosion by thin sol-gel films was studied. The sol-gel films were prepd. by the traditional acid or base-catalyzed hydrolysis and condensation, and finally deposited by dip coating. Two different sol-gel monomers were used: phenyltrimethoxysilane (PTMOS) and Zr(IV) tetra-1-propoxide (ZrTPO). Films were made of each of the individual monomers and by depositing 1st a PTMOS film followed by ZrTPO-based film. The corrosion inhibition of the films and their characterization were examd. by different methods including potentiodynamic polarization, contact angle measurement, adhesion test, XPS, SEM and electrochem. impedance spectroscopy (EIS). While the ZrTPO-based film did not show a significant corrosion inhibition, the PTMOS-based film provided moderate protection. The combined film exhibited superior corrosion inhibition as compared with the other films. [on SciFinder(R)]

Notes:

CAPLUS AN 2008:550288(Journal)