GB1257861A - - Google Patents
Info
- Publication number
- GB1257861A GB1257861A GB1257861DA GB1257861A GB 1257861 A GB1257861 A GB 1257861A GB 1257861D A GB1257861D A GB 1257861DA GB 1257861 A GB1257861 A GB 1257861A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- boric acid
- brass
- annealing
- aqueous solution
- 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.)
- Expired
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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/52—Treatment of copper or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
1,257,861. Coating copper alloys. IMPERIAL METAL INDUSTRIES (KYNOCH) Ltd. 23 Dec., 1969 [3 Jan., 1969], No. 480/69. Heading B2E. [Also in Division C7] Copper alloys e.g. brass are treated prior to annealing in an air atmosphere furnace by applying e.g. by dipping, swabbing or spraying, a hot aqueous solution of boric acid or an inorganic borate, and evaporating the water to leave a film of boric acid or inorganic borate which is preferably more dense than 0.001g/cm<SP>2</SP>. The solutions may contain a wetting agent and suitably 2-27% w/v of boric acid. The film may be removed by cold water washing after annealing. To reduce loss of zinc from the brass, zinc oxide may be added to the aqueous solution. The film may be made self flaking by the inclusion of agents such as alkali metal phosphates or polyphosphates.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB48069 | 1969-01-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1257861A true GB1257861A (en) | 1971-12-22 |
Family
ID=9705091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1257861D Expired GB1257861A (en) | 1969-01-03 | 1969-01-03 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1257861A (en) |
-
1969
- 1969-01-03 GB GB1257861D patent/GB1257861A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |