US1678359A - Method of treating metal articles - Google Patents
Method of treating metal articles Download PDFInfo
- Publication number
- US1678359A US1678359A US103375A US10337526A US1678359A US 1678359 A US1678359 A US 1678359A US 103375 A US103375 A US 103375A US 10337526 A US10337526 A US 10337526A US 1678359 A US1678359 A US 1678359A
- Authority
- US
- United States
- Prior art keywords
- articles
- metal articles
- treating metal
- chromium
- treating
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/085—Iron or steel solutions containing HNO3
Definitions
- This invention relatcsto the manufacture of articles such, for example, as sheets, shapes or the like, from iromimn iron alloys and more particularly to tli e finishing of the surfaces of such articles.
- Articles made from high chromium iron alloys (I refer particularly to those alloys having a chromium content somewhere between 8% and 60%) if annealed, or heat treated attain a hard tenacious coating resembling a'dense scale which is extremely difiicult to remove for the reason that it will not yield to acid pickling nor can it be removed satisfactorily by dry scrubbing.
- An objectlof this invention is to provide .a method of treatin the surfaces of metallic articles so as to qulckly and effectively remove scale and oxide therefrom.
- a further object is to provide a method of treating the surfaces of articles made from chromium iron alloys which have been heat 1 treated so as'to clean the same and simultaneou'sly provide a satin or semi-lustrous finish.
- revolving on a de ree angle may be used for all kinds of sma articles, especially if the container is made from chronnum 11011 or some other substance which is harder than.
- a satisfactory acid bath can be made of from one to ten per cent solution of nitric acid which may be either cold or warm. Heating the acid will shorten the process and produce a whiter finish.
- W rat I claim as new and desire to secure by Letters Patent is 1.
- the method of treating the surfaces of articles made from chromium iron alloys which consists in subjecting said surfaces to the frictional action of solid particles in the presence of a nitric acid solution.
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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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
Description
Patented July 24, 1928.
UNITED- STATES- PATENT OFFICE;
LOUIS SCHULTE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 ALLEGHENY STEEL COMPANY, A CORPORATION OF PENNSYLVANIA.
METHOD OF TREATING METAL ARTICLES. I
No Drawing.
This invention relatcsto the manufacture of articles such, for example, as sheets, shapes or the like, from iromimn iron alloys and more particularly to tli e finishing of the surfaces of such articles.
Articles made from high chromium iron alloys (I refer particularly to those alloys having a chromium content somewhere between 8% and 60%) if annealed, or heat treated attain a hard tenacious coating resembling a'dense scale which is extremely difiicult to remove for the reason that it will not yield to acid pickling nor can it be removed satisfactorily by dry scrubbing.
An objectlof this invention is to provide .a method of treatin the surfaces of metallic articles so as to qulckly and effectively remove scale and oxide therefrom.
A further object is to provide a method of treating the surfaces of articles made from chromium iron alloys which have been heat 1 treated so as'to clean the same and simultaneou'sly provide a satin or semi-lustrous finish.
I have discovered, after many trials, that the tenacious coating on the surface of a chromium iron alloy article can be removed if suclf surfaces are simultaneously subjected to a vigorous scrubbing or scouring action and to a nitric acid bath or solution. Such a procedure not only cleans the surfaces of chromium iron or chromium steel having small perforations in its walls and which is revolved in or partly submerged in atank or bath containing a nitric acid solution. Any closed tumbling barrel may, however, be used if provision is made for a vent pipe or air valve to allow any possible hydrogen gas to escape. The commercial oblique barrel Application filed April 20, 1926. Serial No. 103,375.
revolving on a de ree angle may be used for all kinds of sma articles, especially if the container is made from chronnum 11011 or some other substance which is harder than.
the surface of the articles being treated. For example, hardened chromium iron shot,
chromium iron punchings of various sizes.
I have also obtained satisfactory results by using small river stones or pebbles where a high finish is not required, and glass balls can also be used, but hardened chromium iron or chromium steel particles are the best for all purposes and are practically indestructible.
A satisfactory acid bath. can be made of from one to ten per cent solution of nitric acid which may be either cold or warm. Heating the acid will shorten the process and produce a whiter finish.
W rat I claim as new and desire to secure by Letters Patent is 1. The method of treating the surfaces of articles made from chromium iron alloys which consists in subjecting said surfaces to the frictional action of solid particles in the presence of a nitric acid solution.
preferably screened, is satisfactory as is also 2. The method of treating the surfaces of frictional action of solid particles in the presence of a nitric acid solution.
In testimony whereof, I have hereunto subscribed my name this 17th day of April LOUIS SCHULTE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US103375A US1678359A (en) | 1926-04-20 | 1926-04-20 | Method of treating metal articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US103375A US1678359A (en) | 1926-04-20 | 1926-04-20 | Method of treating metal articles |
Publications (1)
Publication Number | Publication Date |
---|---|
US1678359A true US1678359A (en) | 1928-07-24 |
Family
ID=22294861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US103375A Expired - Lifetime US1678359A (en) | 1926-04-20 | 1926-04-20 | Method of treating metal articles |
Country Status (1)
Country | Link |
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US (1) | US1678359A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2733563A (en) * | 1956-02-07 | Method of cleaning scaled and soiled | ||
US3114657A (en) * | 1960-08-29 | 1963-12-17 | John W Stilwell | Composition and method for cleaning and stripping metals |
US3997358A (en) * | 1976-02-19 | 1976-12-14 | Motorola, Inc. | Cleaning process for semiconductor die |
US4289541A (en) * | 1975-09-25 | 1981-09-15 | Vereinigte Oesterreichische Eisen-Und Sthl-Werke Alpine Montan Akteingesellschaft | Process of cleaning an austenitic steel surface |
US6206755B1 (en) * | 1994-10-19 | 2001-03-27 | United States Surgical Corporation | Method and apparatus for making blunt needles |
US6217415B1 (en) * | 1999-04-06 | 2001-04-17 | Caterpillar Inc. | Method and arrangement for reducing friction between metallic components |
US6464565B1 (en) * | 2001-04-09 | 2002-10-15 | Edward A. Audet | Method of polishing sterling silver and gold pieces |
-
1926
- 1926-04-20 US US103375A patent/US1678359A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2733563A (en) * | 1956-02-07 | Method of cleaning scaled and soiled | ||
US3114657A (en) * | 1960-08-29 | 1963-12-17 | John W Stilwell | Composition and method for cleaning and stripping metals |
US4289541A (en) * | 1975-09-25 | 1981-09-15 | Vereinigte Oesterreichische Eisen-Und Sthl-Werke Alpine Montan Akteingesellschaft | Process of cleaning an austenitic steel surface |
US3997358A (en) * | 1976-02-19 | 1976-12-14 | Motorola, Inc. | Cleaning process for semiconductor die |
US6206755B1 (en) * | 1994-10-19 | 2001-03-27 | United States Surgical Corporation | Method and apparatus for making blunt needles |
US6217415B1 (en) * | 1999-04-06 | 2001-04-17 | Caterpillar Inc. | Method and arrangement for reducing friction between metallic components |
US6464565B1 (en) * | 2001-04-09 | 2002-10-15 | Edward A. Audet | Method of polishing sterling silver and gold pieces |
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