SE9602540D0 - Method of processing a metal product - Google Patents
Method of processing a metal productInfo
- Publication number
- SE9602540D0 SE9602540D0 SE9602540A SE9602540A SE9602540D0 SE 9602540 D0 SE9602540 D0 SE 9602540D0 SE 9602540 A SE9602540 A SE 9602540A SE 9602540 A SE9602540 A SE 9602540A SE 9602540 D0 SE9602540 D0 SE 9602540D0
- Authority
- SE
- Sweden
- Prior art keywords
- product
- metal
- oven
- hydr
- metal product
- Prior art date
Links
- 239000002184 metal Substances 0.000 title abstract 7
- 238000000034 method Methods 0.000 title abstract 2
- 239000000047 product Substances 0.000 abstract 7
- 239000010410 layer Substances 0.000 abstract 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 239000011260 aqueous acid Substances 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 230000001143 conditioned effect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
A method for treating a cold-processed metal product having a thin (hydr)oxide layer (1) on its surface, comprises heating the product in an oxidising atmosphere inside an oven until it glows red hot and then treating the product to remove scale formed on the product surfaces in the oven.Before the product is heated in the oven it is pre-treated in an aqueous acid solution containing free protons that completely remove the (hydr)oxide layer by means of a reduction reaction to enable the metal beneath this layer to be oxidised and form a new surface layer (2) comprising the reaction products of the acid solution components with the metal and optional unreacted components in the metal. The conditioned metal product is then heated in the oven. Preferably a stainless steel metal product is pre-treated in sulphuric acid, hydrochloric acid or hydrofluoric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9602540A SE9602540L (en) | 1996-06-27 | 1996-06-27 | Method of processing a metal product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9602540A SE9602540L (en) | 1996-06-27 | 1996-06-27 | Method of processing a metal product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE9602540D0 true SE9602540D0 (en) | 1996-06-27 |
| SE9602540L SE9602540L (en) | 1997-12-28 |
Family
ID=20403180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9602540A SE9602540L (en) | 1996-06-27 | 1996-06-27 | Method of processing a metal product |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE9602540L (en) |
-
1996
- 1996-06-27 SE SE9602540A patent/SE9602540L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE9602540L (en) | 1997-12-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
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