Galfan Gabions, or Galfan Coated Gabions are steel wire mesh gabions woven or welded, specially treated with Zn + AL coating offering an excellent corrosion resistance. Galfan gabions have a better propety than zinc galvanized gabions and are widely used in soil retaining, slope protection, especially for offshore areas and long term uses.
Galfan coating has two types according to coating material ratio: one is 95% zinc and 5% aluminum or 90% zinc and 10% aluminum coating.
GalFan + PVC Coated woven wire mesh gabions, mechanically edged/selvedged
Woven, double twisted, hexgonal shaped steel wire Mesh,
(Zn90%+Al10%)+PVC coated
Popular mesh opening applied: 80x100mm.
One diaphragm every one meter (or at 3ft center) is positioned to
divide the gabions into cells.
This structure makes the whole gabion flexible and easy to
handle.
This type of woven or knitted mesh gabion has selvedge wire and
lacing wire for reinforcement. All mesh panel edges are selvedged
with a wire having a greater diameter than the woven or knitted
wire.
Galfan (95% zinc, 5% aluminum or 90% zinc 10% alum) coating and
its benefits:
Galfan gabion gets its name from its wire material: a kind of
heavy Galfan soft tempered steel . Compared with traditional
galvanized steel gabions with pure zinc coating, Galfan gabion
features a heavy zinc – aluminum coating layer which enables an
excellent corrosion resistance. The corrosion resistance of
Galfan gabion doubles that of traditional pure zinc
plating.
Wire
Material Requirements:
The
pvc coating for Galfan Gabions can be checked below (take
an example of the 80x100mm galfan gabion), from the changes of
the wire diameter before and after coating:
Knitted or woven
wire: 3.7mm after PVC coating (2.7mm heavy Galfan before
pvc coating)
Selvedge
wire: 4.2mm after PVC coating (3.2mm heavy Galfan before
pvc coating)
Lacing
wire: 3.2mm after PVC coating (2.2mm heavy Galfan before
pvc coating)
Zinc
plating or galvanization required for the Galfan
Gabions:
Galvanization on
Kitted & Lacing wire: Heavy GALFAN (ZnAL) min 245gr/m2
Galvanization on
Selvedge wire: Heavy GALFAN (ZnAL) min 255gr/m2