Regular Spangle/Minimum Spangle 600-1250mm Width Hot Dipped Dx51d
Z275 Zinc Coated Galvanized Steel Coil
| Technical Standard | EN10147/EN10142/DIN 17162/JIS G3302/ASTM A653 |
| Grade | Dx51D, Dx52D, Dx53D, DX54D, S220GD, S250GD, S280GD , S350GD,
S350GD, S550GD; SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490,
SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC340 , SGC490, SGC570; SQ
CR22 (230), SQ CR22 (255), SQ CR40 (275), SQ CR50 (340), SQ CR80
(550), CQ, FS, DDS, EDDS, SQ CR33 (230), SQ CR37 (255), SQCR40
(275), SQ CR50 (340), SQ CR80 (550); or Customer's Requirement |
| Type | Coil/Sheet/Plate/Strip |
| Thickness | 0.125-6.00mm,or customer's requirement |
| Width | 600mm-1500mm,according to customer's requirement |
| Type of Coating | Hot Dipped Galvanized Steel(HDGI)/Electro-Galvanised Steel(EGI) |
| Zinc Coating | 20-275g/m2 |
| Surface Treatment | Passivation(C),Oiling(O),Lacquer
sealing(L),Phosphating(P),Untreated(U) |
| Surface Structure | Normal spangle coating(NS),minimized spangle
coating(MS),spangle-free(FS) |
| ID | 508mm/610mm,according to customer's requirement |
1. The mechanism of producing zinc flowers in the coating of
hot-dip galvanized coil/sheet. Beautiful zinc flowers are a main
feature of hot-dip galvanized coil
The most complete form of zinc crystal is similar to snowflake or
hexagonal star, so the zinc crystal on the surface of strip steel
is most likely to be shaped
Into snowflakes or hexagonal star zinc flowers.
1.1 conditions required for the formation of zinc flowers. Add two
kinds of alloy elements with different properties to the zinc
solution
Elements, one kind of which is fully soluble in molten zinc, but
hardly soluble in solid zinc, such as lead and titanium;
The other is soluble in both liquid and solid zinc, such as
aluminum, tin, antimony, etc. If you add a single
Although the alloy elements can change the surface state of the
solidified coating, they cannot form typical zinc flowers,
Usually, the lead-free process we use to produce small zinc flowers
is based on this principle.
1.2 the shape of zinc flower the shape of zinc flower depends on
the type of two kinds of alloys, such as: selecting lead antimony
can obtain
Get Phoenix Tail zinc flower; Choose lead tin to get sheep tooth
zinc flower and so on. Crystal orientation of zinc flower on
coating surface
Its appearance is different, and there are also differences in
processing, such as: the processability of feathery zinc flowers in
simple stretching and deep drawing
The processability of fern shaped and leaf shaped zinc flowers is
the worst; While in bending and tension processing, leaves
The processability of zinc flower is the best, followed by feather
zinc flower and sheep tooth zinc flower
Definition of galvanized coil coating
1, normal zinc flower coating During the normal solidification
process, the zinc grains grow freely and the coating with obvious
zinc flower morphology is formed.
2, small zinc flower coating During the solidification process of
zinc layer, the zinc grains are artificially limited to form as
fine zinc flower coating as possible.
3, no zinc flower coating By adjusting the chemical composition of
the bath, the coating does not have visible zinc flower morphology,
uniform surface.
4, zinc iron alloy coating After heat treatment of the steel strip
through the galvanized tank, the entire coating into zinc and iron
alloy layer, this coating appearance is dark gray, no metallic
luster, easy to powder in the violent forming process, suitable for
in addition to general cleaning, without further treatment can be
directly painted coating.
5, the thickness of the coating,On both sides of galvanized steel
plate, it is required to have different layers of coating weight.
6, finishing Finishing is a cold rolling of galvanized steel sheet
with a small amount of deformation for one or more of the following
purposes. Improve the surface appearance of galvanized steel plate
or suitable for decorative coating; So that the finished product is
not processed when the phenomenon of slip line or fold grain
temporarily reduced to the minimum.
