1.Method for protecting stainless steel flow-conducting component used in hot geothermal brine service from chloride stress corrosion caused by contact of geothermal brine with an exterior surface of said component comprising thermally coating said exterior surface with metal having an electrode potential more negative than that of the Stainless Steel Lost Wax Casting Parts Partsbeing protected.
2.For protecting flow-conducting component constructed of stainless steel containing less than about 15 weight percent nickel used in geothermal brine service from chloride stress corrosion caused by contact of geothermal brine having temperature of at least about 150?? F. with an exterior surface of said component comprising thermally-spraying onto an exterior surface thereof metal selected from the group consisting of mild steel, aluminum, zinc, magnesium, and mixtures thereof to provide metal coating of at least about 5 mils.
3.The protective method as claimed in claim 2 wherein said Stainless steel Investment Casting Parts is selected from austenitic stainless steel and chrome-duplex types of stainless steels.
4.For protecting stainless steel flow-conducting component used in geothermal brine service from stress corrosion cracking caused by contact of geothermal brine with an exterior surface of said component comprising thermally-spraying onto said exterior surface in region of residual stress metal having an electrode potential more negative than that of the stainless steel being protected.
5.Method for protecting stainless steel flow-conducting component through which is flowed corrosive geothermal brine having temperature of at least about 150?? F. from stress corrosion cracking caused by contact of geothermal brine with an exterior surface of said component comprising thermally-spraying mild steel onto said exterior surface in region of residual stress to provide thereon mild steel coating of at least about 5 mils.
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