Joining method for stainless steel pipe with zirconium alloy pipe
Description
The present invention concerns a method of joining a pressure tube and an extension tube of a PWR type reactor. Zirconium or a zirconium alloy is applied on the outer surface of a stainless steel pipe by ion plating or flame-coating. Alternatively, a titanium alloy containing 5% or 35% of aluminum of less noble potential than the stainless steel is applied on the outer surface of the stainless steel pipe by ion plating or flame-coating. As a result, the potential difference between the zirconium alloy and the stainless steel is decreased to suppress metal joining corrosion, and the melted oxygen diffused and penetrate to the gap between the stainless steel and the interposed material is captured by titanium and aluminum and converted into a stable oxide. Accordingly, the corrosion of the gap is suppressed, thereby enabling to prevent failures. (N.H.)
Availability note (English)
Available from JAPIO. Also available from EPO.Additional details
Publishing Information
- Imprint Pagination
- 4 p.
- IPC:
- Int. Cl. G21D1/00; B21D39/04; F16L13/00; F16L21/02.
- IPC
- Int. Cl. G21D1/00; B21D39/04; F16L13/00; F16L21/02.
- Patent number
- JP patent document 5-172989/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 25022756
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CORROSION PROTECTION; ELECTRIC POTENTIAL; ELECTROCHEMICAL COATING; ELECTROCHEMICAL CORROSION; ELECTROPLATING; JOINING; OPENINGS; PIPE JOINTS; PRESSURE TUBE REACTORS; PRESSURE TUBES; ZIRCALOY
- Descriptors DEC
- ALLOYS; CHEMICAL COATING; CHEMICAL REACTIONS; CORROSION; DEPOSITION; ELECTRODEPOSITION; ELECTROLYSIS; FABRICATION; JOINTS; PLATING; POWER REACTORS; REACTORS; SURFACE COATING; TUBES; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS
Optional Information
- Secondary number(s)
- JP patent application 3-342717.