发明名称 |
VERFAHREN ZUR HERSTELLUNG EINES GESCHWEISSTEN ROHRES MIT HOCHKORROSIONSBESTAENDIGER INNENOBERFLAECHE |
摘要 |
Disclosed are a welded pipe with an excellent corrosion resistance, having two plate layers on the inner surface thereof, and a method of manufacturing it. The inner surface is coated with the plate layers even on the bead part and other steel foundation-exposed parts. A first plate layer of at least one of Ni, Co and Ni- or Co-base alloys is formed on at least one surface of a steel strip, then a second plate layer made of a metal or alloy having a lower melting point than the metal or alloy of forming the first plate layer is formed over the first plate layer. The thus plated steel strip is formed into a pipe and then heat-treated to give a welded pipe having no exposed steel foundation. The welded pipe has excellent corrosion resistance and workability. |
申请公布号 |
DE4136038(A1) |
申请公布日期 |
1992.05.07 |
申请号 |
DE19914136038 |
申请日期 |
1991.11.01 |
申请人 |
USUI KOKUSAI SANGYO KAISHA LTD., SUNTO, SHIZUOKA, JP |
发明人 |
YAMANASHI, HIROSHI, MISHIMA, SHIZUOKA, JP |
分类号 |
C25D5/10;C25D7/04;F16L58/08 |
主分类号 |
C25D5/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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