Pipe having heat-resistant and corrosion-resistant plating layer that has excellent workability
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United States of America Patent
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Apr 4, 2017
Grant Date -
May 28, 2015
app pub date -
Jun 27, 2013
filing date -
Jul 4, 2012
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Abstract
Provided is a pipe having a heat-resistant and corrosion-resistant multi-layered plated layer excellent in workability. The pipe includes a multi-layered plated layer including: a ZnNi alloy plated layer that has a Ni content of 5% to 9% and a layer thickness of 3 μm to 9 μm and is formed as a first layer on a surface of a base steel pipe; another ZnNi alloy plated layer that has a Ni content of 10% to 15% and a layer thickness of 1 μm to 3 μm and is deposited as a second layer on the ZnNi alloy plated layer formed as the first layer; and a chromate film that is formed on the ZnNi alloy plated layer formed as the second layer.
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