Influence of Steel Surface Property on Galvannealing Rate of Galvanized Steel Sheet

The Effect of Si and Mn Content on Dynamic Wetting of Steel with Liquid Zn

“…Many reports have focused on the wettability of liquid Zn on steels containing Si and Mn. [4][5][6][7][8][9][10][11][12][13][14] The wettability of liquid Zn on steels has been reported to improve upon addition of Ni to the liquid Zn bath 10) or by oxidation and reduction processing 9) etc. The wettability of liquid Zn on steels has been qualitatively evaluated after galvanizing processing by counting the number of defects with bad-wetting 11,12) or measuring the mechanical adhesion properties of a Zn layer with steel substrates.…”

Influence of Inhibition Layer on Adhesion of a Galvanized High Al Dual Phase Steel

“…However, in sample 1, the Manganese oxides have small quantity and uniformly distribute on Fe-Al(-Zn) particles in shape of little spheres, while in sample 2 and 3, the Manganese oxides exist in the open areas of the inhibition layer with much larger quantities. Manganese oxides are reported to have prohibition effect on the nucleation and growth of Fe-Al (-Zn) intermetallics [7][8][9][10][11][12]. Therefore, the loose inhibition layers in sample 2 and 3 are led by the manganese oxides existing at the interface.…”

“…It has been pointed out that one of the reasons for the bad-wettabiliy for high tensile strength steels is related to the formation of oxides of Mn and Si on steel surface [7]. These oxides prohibit the nucleation and growth of Fe-Al (-Zn) intermetallics on the inhibition layer and lead to a formation of a brittle Fe-Zn intermetallics between the steel substrate and the Zn coating, which makes a bad adherence of the galvanized coating [8][9][10].…”