STEEL MATERIAL OF HIGH CORROSION RESISTANCE PRODUCED BY HOT-DIP GALVANISING Russian patent published in 2011 - IPC C23C2/06 

FIELD: metallurgy.

SUBSTANCE: steel material produced by hot-dip galvanising has layer of alloyed coating containing Zn at amount of 35 wt % or more and Mg at amount from 1 to 60 wt %. Also, the layer of alloyed coating contains a non-equilibrium phase, thermal capacity of which measured by differential scanning calorimetry at rate of temperature growth 0,5°C/sec is equal to 1 J/g or more. Additionally, 5 vol % or more, mainly 50 vol % or more, of the said layer correspond to an amorphous phase. The layer of alloyed coating also can contain, in wt %, Al from 0.07 to 59% and one or more elements, chosen from Cr, Mn, Fe, Co, Ni and Cu in summary amount from 0.1 to 10% and one or more elements out of La from 0.1 to 10%, Ce from 0.1 to 10%, Ca from 0.1 to 10%, Sn from 0.1 to 10%, P from 0.005 to 2% and Si from 0.02 to 7%.

EFFECT: production of steel material of high corrosion resistance of both proper layer of coating and metal iron protected with applied layer and of high processability not associated with fracture caused by formation of inter-metallic compounds of added elements.

23 cl, 2 dwg, 5 tbl, 2 ex