ANTICORROSIVE STRUCTURE FOR EXPANSION DEVICE

Japanese Patent JP2019100090

A

To provide an anticorrosive structure for an expansion device which can provide a sufficient corrosion-proof effect for a face plate.SOLUTION: An expansion device 1 is provided with two face plates 3, 3 made of steel which are fixed by a bolt 12 at ends of two floor slabs 2 opposed to each other across a joint gap G; a gutter 6 made of stainless steel which is fixed together with the face plates 3 by the bolt 12 to the floor slabs 2 and arranged within the joint gap G; a sacrificial anode 4 made of an Al-1Zn alloy and arranged on a backup member 7 that is arranged inside the gutter 6; a conductive wire 5 electrically connecting the sacrificial anode 4 to the face plates 3; and sediments 8 accumulated on the backup member 7 to cover the sacrificial anode 4 and also come into contact with the underside surface of the face plates 3. The gutter 6, the face plates 3, and the sacrificial anode 4 are electrically connected to one another so as to form the potentials which become lower in this order, and then corrosion current flows to the sediment 8 so as to generate an anode reaction at the sacrificial anode 4, thereby preventing the corrosion of the face plate 3.SELECTED DRAWING: Figure 1

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KAINUMA SHIGENOBU
TSUKAMOTO NARIAKI
IGUCHI SUSUMU
UCHIDA DAISUKE

JP2017232280A

June 24, 2019

December 04, 2017

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KAINUMA SHIGENOBU
HANSHIN EXPRESSWAY ENG CO LTD
JAPAN BRIDGE ASS

C23F13/02; E01C11/02; C23F13/06; C23F13/16; E01D19/06

JP2008057284A	2008-03-13
JP2016094633A	2016-05-26
JP2007269323A	2007-10-18
JP2003064613A	2003-03-05
JP2014084690A	2014-05-12
JP2012237037A	2012-12-06

US20020138925A1

2002-10-03

Atsushi Morikawa

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