GB783526A - Hollow drill steel and a method for its manufacture - Google Patents
Hollow drill steel and a method for its manufactureInfo
- Publication number
- GB783526A GB783526A GB18309/54A GB1830954A GB783526A GB 783526 A GB783526 A GB 783526A GB 18309/54 A GB18309/54 A GB 18309/54A GB 1830954 A GB1830954 A GB 1830954A GB 783526 A GB783526 A GB 783526A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphate
- treated
- steel
- coating
- june
- 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
- C23C22/82—After-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
783,526. Preventing corrosion. SANDVIKENS JERNVERKS AKTIEBOLAG.. June 22, 1954 [June 29. 1953], No. 18309/54. Class 123(1) [Also in Group XXIII] A hollow percussive drill steel has the flushing channel or the flushing channel and the outer surface provided with a phosphate coating consisting of a grained. layer of phosphate crystals, and the phosphate coating is in turn coated with a corrosion preventing coating which is partly absorbed by the phosphate coating. The steel may be cleaned by pickling or sand-blasting, then treated with a phosphate solution, and finally given a coating of an oil, a fat, a paint or lacquer, a wax, rubber, an elastomeric plastic, or a silicone. Before application of the phosphate the surface of the steel may be treated to produce a compressive stress, e.g. by shot peening or cold drawing, or an increased hardness, e.g. by nitriding, case hardening, or surface hardening, therein, and after phosphating the steel may be treated with a solution of sodium or potassium chromate or chromic acid. Drill steels so treated are stated to have longer lives than untreated steels.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE783526X | 1953-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB783526A true GB783526A (en) | 1957-09-25 |
Family
ID=20336772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18309/54A Expired GB783526A (en) | 1953-06-29 | 1954-06-22 | Hollow drill steel and a method for its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB783526A (en) |
-
1954
- 1954-06-22 GB GB18309/54A patent/GB783526A/en not_active Expired
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