| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9566885 | Applied Surface Science | 2005 | 7 Pages |
Abstract
The effect of carbonate anion on the pitting corrosion and inhibition behavior of stainless steel samples (304L SS and 316L SS) has been studied using potentiodynamic and scanning electron microscope (SEM) techniques. The effect of concentration of CO32â ions, pH, potential scanning rate and the composition of stainless steel are discussed. Additions of Clâ and Brâ ions into the carbonate solution increase the anodic dissolution of stainless steel and decrease its pitting corrosion resistance. The effect of CO32â anion on the inhibition of chloride and bromide pitting corrosion of the two stainless steel types has been studied also. Pitting corrosion decrease with the increasing of sodium carbonate concentration, i.e. increases the resistance of stainless steels towards the chloride and bromide pitting corrosion. This inhibition effect argued to formation of [Fe,Cr]CO3 film caused by preferential adsorption of the CO32â ion, leading to instantaneous repair of weak sites for pit nucleation.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
S.A.M. Refaey, F. Taha, A.M. Abd El-Malak,