Corrosion-Resistant Member and Method for Manufacture Thereof
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United States of America Patent
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Issued Date -
Feb 7, 2008
app pub date -
Sep 30, 2005
filing date -
Oct 18, 2004
priority date (Note) -
Abandoned
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Abstract
A corrosion-resistant member used in a corrosive environment includes a substrate, and a ceramic sprayed film, which covers a part or all of the substrate surface and has relative density of 80% or greater. Maximum diameter of voids existing in the ceramic sprayed film surface is 25 .mu.m or less. This corrosion-resistant member is obtained by using Y.sub.2O.sub.3 as a material having a bulk density of at least 1.5 g/cm.sup.3 and dried to a moisture content of 1 mass percent or less and spraying plasma on the substrate with an output power of 40 to 110 kW by a spraying device including two anode torches.
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