Haidian Building 1-21H, Nanhai Street, Nanshan District, Shenzhen, China Code 518054
0755-26070067 26070127 26070322
TECHWELL Copper Clad Steel Rod are made by clading 99.9% pure
electrolytic copper onto a low carbon steel core and it increases
corrosion of the earthing. The steel core is a bar drawn up to the
required diameter. TECHWELL Copper Clad Steel Rod copper clading
technology let to get uniform copper layer on the whole length of
the rods. The copper jacket is 0.30-1.0 mm thick according to customer need and it ensures the preservation
of the earth rod in the ground for at least 30 years. TECHWELL
Copper Clad Steel Rod are highly tensile strength 600 N/mm2, they
can be driven by vibro-hammers to great depths (even up to 60
meters). |
To ensure a high performance of the rod, we have developed system
of quality control. This system covers the whole constructional
cycle, from material purchase to the end of production process, so
as to reach conformity of ready rod parameters with its
specification. Among others, this system provides tests of the
following basic parameters of our earth rod.
Copper thickness - measured by an electronic thickness gauge at the points and with
frequency specified in the instruction, which guarantees minimal
thickness 0.30 -1.0 mm . This thickness enables to perform the thread after copper
bonding, so as the bottom of the thread is covered with copper.
Adherence of copper - is tested in order to check whether the coating has not a
tendency to separation when the rod is driven into the ground. It
is tested as follows. Pointed rod is being shoved between the vice
jaws. Distance between jaws equals the rod diameter decreased by
1.2 mm . When the rod is being shoved, the vice jaws tear off the
coating at points where they contact the rod, while the rest of its
surface should not exfoliate. Such an adherence enables performing
of thread with rolling technique, after copper bonding.
Plasticity of copper - is tested by bending the rod at 180 degrees. Lack of cracks and
exfoliation goes to show high quality of our product.
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