US1415198A - Process of brightening and hardening electrolytically-tinned articles - Google Patents
Process of brightening and hardening electrolytically-tinned articles Download PDFInfo
- Publication number
- US1415198A US1415198A US395626A US39562620A US1415198A US 1415198 A US1415198 A US 1415198A US 395626 A US395626 A US 395626A US 39562620 A US39562620 A US 39562620A US 1415198 A US1415198 A US 1415198A
- Authority
- US
- United States
- Prior art keywords
- electrolytically
- articles
- brightening
- hardening
- tinned
- 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 - Lifetime
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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
- C23F3/00—Brightening metals by chemical means
Definitions
- This invention relates to a process of brightening and hardening electrolytically tinned articles.
- I employ a neutral chemical compound having a melting point higher than that of tin.
- This chemical compound may be ordinary commercial saltpetre which is melted in an iron pot by means of a gas flame or any other suitable heating medium, and in this molten saltpetre I suspend the electrolyticall tinned articles for a few seconds, which pro uces a bright finish and case-hardens the 1 tin to a structure heretofore not known which will impart a long wearing quality to a thin coating of tin.
- a process of brightening and hardening electrolytic tin which comprises immersing the same in molten saltpetre.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Description
LOUIS SCHULTE, OF CHICAGO, ILLINOIS.
PROCESS OF BRIGHTENING AND HARDENING ELECTROLYTICALLY-TINNED ARTICLES.
No Drawing. Application filed July 12,
and useful Improvements in Processes of Brightening and Hardening Electrolytically-Tinned Articles, of which the following is a full, clear, and exact description.
This invention relates to a process of brightening and hardening electrolytically tinned articles.
In the art of electrolytic tinning, it is well known that electrolytic depositions of tin and other metals cannot be produced with a bright or lustrous surface. I have found a method by which such tin deposits can be brightened and hardened at the same time, thereby greatly improving the electrolytic tinning. v
In the preferred form of the invention, I employ a neutral chemical compound having a melting point higher than that of tin. This chemical compound may be ordinary commercial saltpetre which is melted in an iron pot by means of a gas flame or any other suitable heating medium, and in this molten saltpetre I suspend the electrolyticall tinned articles for a few seconds, which pro uces a bright finish and case-hardens the 1 tin to a structure heretofore not known which will impart a long wearing quality to a thin coating of tin.
Some of the saltpetre willadhere to the Specification of Letters Patent.
Patented May 9, 1922.
1920. Serial No. 395,626.
metal articles and this may be removed by dipping same in boiling water and after such boiling water has become saturated with saltpetre, this may be evaporated to leave a residue of saltpetre, which may be used over.
again in the melting pot.
I claim:
1. The herein described process which comprises immersing electrolytically tinned articles in a molten chemical compound having a melting point above that of tin.-
2. The herein described process which comprises immersing electrolytically tinned articles in a neutral molten chemical compound.
3. The herein described process which comprises immersing electrolytically tinned articles in saltpetre.
4. The process of brightening electrolytie cally tinned metal articles, which comprises immersing said articles in molten saltpetre.
. 5. The process of hardening electrolytic tin, which comprises immersing electrolytically tinned articles for a few seconds in molten saltpetre.
6. A process of brightening and hardening electrolytic tin, which comprises immersing the same in molten saltpetre.
The herein described process which comprises immersing electrolytically tinned articles in molten commercial 'saltpetre.'
In testimony that I claim the foregoing l hereunto ailix my signature.
' LOUIS SCHULTE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US395626A US1415198A (en) | 1920-07-12 | 1920-07-12 | Process of brightening and hardening electrolytically-tinned articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US395626A US1415198A (en) | 1920-07-12 | 1920-07-12 | Process of brightening and hardening electrolytically-tinned articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1415198A true US1415198A (en) | 1922-05-09 |
Family
ID=23563814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US395626A Expired - Lifetime US1415198A (en) | 1920-07-12 | 1920-07-12 | Process of brightening and hardening electrolytically-tinned articles |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1415198A (en) |
-
1920
- 1920-07-12 US US395626A patent/US1415198A/en not_active Expired - Lifetime
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