JPS5576055A - Corrosion preventing method for weld heat-affected zone - Google Patents
Corrosion preventing method for weld heat-affected zoneInfo
- Publication number
- JPS5576055A JPS5576055A JP14994778A JP14994778A JPS5576055A JP S5576055 A JPS5576055 A JP S5576055A JP 14994778 A JP14994778 A JP 14994778A JP 14994778 A JP14994778 A JP 14994778A JP S5576055 A JPS5576055 A JP S5576055A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- metal
- welding
- affected zone
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
PURPOSE:To prevent occurrence of pitting corrosion, stress corrosion cracking, intergranular corrosion, etc. in a weld heat-affected zone by depositing a metal nobler than a parent metal on the zone and heat diffusing the nobler metal to the parent metal side with welding heat to form a passivation film. CONSTITUTION:Noble metal 4 such as palladium is deposited on a joining portion of austenitic steel, titanium clad or the like within a range where welding heat is affected before or immediately after backing plate 1 and clad 2 are welded by fillet welding or other method. Metal 4 is heat diffused to the surfaces of plate 1 and clad 2 with welding heat to form a strong passivation film. Since the noble metal is used only at the heat-affected zone apt to undergo local corrosion, manufacture of equipment and welding can be performed easily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994778A JPS5576055A (en) | 1978-12-06 | 1978-12-06 | Corrosion preventing method for weld heat-affected zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994778A JPS5576055A (en) | 1978-12-06 | 1978-12-06 | Corrosion preventing method for weld heat-affected zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5576055A true JPS5576055A (en) | 1980-06-07 |
Family
ID=15486049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14994778A Pending JPS5576055A (en) | 1978-12-06 | 1978-12-06 | Corrosion preventing method for weld heat-affected zone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5576055A (en) |
-
1978
- 1978-12-06 JP JP14994778A patent/JPS5576055A/en active Pending
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