Hot dipping method for zinc-aluminum coating of bridge cable
A bridge cable and aluminum coating technology, applied in the field of bridge cables, to achieve the effect of ensuring the aluminum content requirements and increasing the line speed
Inactive Publication Date: 2018-01-09
杨晓艳
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Problems solved by technology
[0009] But how to prevent the oxidation of aluminum, so as to eliminate the influence of aluminum oxide on the appearance of steel wire, is the technical difficulty of hot-dip galvanized aluminum alloy coating by flux method
Method used
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Embodiment 1
[0032] The invention relates to a hot-dip method for zinc-aluminum coating of a bridge cable. Steel wires are firstly galvanized in a zinc furnace, and then galvanized in a zinc-aluminum alloy furnace. In the zinc-aluminum alloy, the aluminum content is 10wt%, the wire running speed is 30m / min, the hot-dip temperature is controlled at 450°C, and the zinc-aluminum alloy coated steel wire is wiped with nitrogen gas.
Embodiment 2
[0034] The invention relates to a hot-dip method for zinc-aluminum coating of a bridge cable. Steel wires are firstly galvanized in a zinc furnace, and then galvanized in a zinc-aluminum alloy furnace. In the zinc-aluminum alloy, the aluminum content is 6.5wt%, the wire running speed is 35m / min, the hot-dip temperature is controlled at 430°C, and the zinc-aluminum alloy coated steel wire is wiped with nitrogen gas.
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The invention discloses a hot dipping method for a zinc-aluminum coating of a bridge cable. A steel wire is firstly subjected to galvanizing by a zinc furnace and then subjected to coating of zinc-aluminum alloy by a zinc-aluminum alloy furnace. The zinc-aluminum alloy coating steel wire obtained by the method meets requirements of national standards on the steel wire for the bridge cable, and canreplace a hot galvanized steel wire to be applied to a large bridge cable. The performance indexes of the zinc-aluminum alloy coating steel wire not only meet the requirements of national standards,but also are large in allowance and the performances are equal to or superior to the galvanized steel wire.
Description
technical field [0001] The invention relates to the field of bridge cables, in particular to a hot-dip method for zinc-aluminum coating of bridge cables. Background technique [0002] Bridge cables are load-bearing and force-transmitting components of cable bridges, mainly including main cables, suspension cables and stay cables of suspension bridges, cable-stayed bridges and arch suspension bridges. Hot-dip metal coating is an effective method for corrosion protection of steel wire, and the metal coating applied to steel wire is mainly hot-dip galvanized. [0003] Generally, the galvanizing process of steel wire is: pay-off rack - pre-plating treatment - help plating - hot-dip galvanizing - cooling - take-up rack. The hot-dip galvanizing process of the first developed zinc-aluminum alloy coating is basically the same as that of hot-dip galvanizing, except that the flux and metal melting furnace have been changed, which is usually called the "flux method". Usually, the flu...
Claims
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IPC IPC(8): C23C2/06C23C2/38C22C18/04
Inventor 杨晓艳
Owner 杨晓艳