US2336020A - Sandblasting process - Google Patents
Sandblasting process Download PDFInfo
- Publication number
- US2336020A US2336020A US406371A US40637141A US2336020A US 2336020 A US2336020 A US 2336020A US 406371 A US406371 A US 406371A US 40637141 A US40637141 A US 40637141A US 2336020 A US2336020 A US 2336020A
- Authority
- US
- United States
- Prior art keywords
- ferrophosphorus
- metal
- iron
- sand
- cleaned
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
Definitions
- This invention relates to a process of treating metals by the impact of small particles or shots of ferrophosphorus.
- An object of this invention is the provision of a process whereby metals generally and particularly ferrous metals such as iron and steel may be cleaned, and the surface thereof treated to impart corrosion resisting properties.
- ferrophosphorus be finely divided, which may be done by crushing or grinding that the particles of ferrophosphorus have very sharp edges and that these sharp edges are maintained and renewed during use.
- finely ground or crushed ferrophosphorus may, 1 according to my invention, be introduced into a stream of air moving at high velocity and pro- .iected against the metal surfaces to be cleaned. I have found that the ferrophosphorus being brittle tends to somewhat penetrate the surface of the material being cleaned which penetration by means of mechanical devices which are now commonly employed in this art.
- the ferrophosphorus may be subdivided into any reasonable size as may be suitable for the particular device used for sand blasting. In general, however, where the material is to be suspended in an air stream the metal should be crushed or ground to a, size of from 4 mesh to about 20 mesh.
- Treatment of iron or steel surfaces may generally be carried out at ordinary temperatures, however, for certain purposes, where it is desired to accelerate the penetration of ferrophosphorus into the iron, it may be desirable to heat the metal, and also the ferrophosphorus particles in any suitable manner and then carry out may be of molecular dimensions and that minor amounts of the ferrophosphorus remain imbedded in or adhere to the iron or steel or other metal surface.
- the ferrophosphorus employed in my invention may be the ordinary blast furnace type of metal known commonly as low metal which has a'phosphorus content in the neighborhood of 17% to 18%, or it may constitute the "high" metal as produced in the electric furnace.
- “bigh metal normally runs from 22% to 25% or 26% or more in phosphorus, or it may constitute alloys of intermediate composition. In general I prefer to employ the so-called “high” metal, because it is somewhat more brittle and harder.
- the temperatures may range upwardly'to as high a 500 C. to 600 C. or even higher, and may desirably include the critical temperature range of iron.
- the finely divided ferrophosphorus is preferably employed as such as a sand blasting abrasive, however it may for 'certain purposes be mixed with other metallic and non-metallic abrasives, for the purpose of obtaining special effects.
- the fine- 1y divided ferrophosphorus may be suspended in a rapidly moving stream of air as in ordinary sand blasting operations or it may be projected 7.'As a material for simultaneously cleaning and rust proofing metal surfaces, a "sand blasting" sand comprising finely divided ferrophosphorus.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
Patented Dec. 7,1943
UNITED; STATES PATENT" OFFICE sannsmsme raocsss Herbert J. Krase, Dayton, Ohio, assignor to Monsanto Chemical Company, a corporation of Delaware No Drawing. Application August 11, 1941,
Serial No. 406,371
7 Claims.
' This invention relates to a process of treating metals by the impact of small particles or shots of ferrophosphorus.
An object of this invention is the provision of a process whereby metals generally and particularly ferrous metals such as iron and steel may be cleaned, and the surface thereof treated to impart corrosion resisting properties.
It has already been proposed to sand blast iron or steel surfaces by means of combinations of sand and acid phosphates, particularly sodium acid phosphate. Such acid salts of phosphoric acid, however, are relatively soft and usually due to the blasting action of the sand are rapidly disintegrated to relatively small particles which are. lost as dust from the sand blasted surface.
They are moreover soluble and may readily be removed from the surface treated therewith.
I have now found that if ferrophosphorus be finely divided, which may be done by crushing or grinding that the particles of ferrophosphorus have very sharp edges and that these sharp edges are maintained and renewed during use. The
. finely ground or crushed ferrophosphorus may, 1 according to my invention, be introduced into a stream of air moving at high velocity and pro- .iected against the metal surfaces to be cleaned. I have found that the ferrophosphorus being brittle tends to somewhat penetrate the surface of the material being cleaned which penetration by means of mechanical devices which are now commonly employed in this art. For the purpose of this invention the ferrophosphorus may be subdivided into any reasonable size as may be suitable for the particular device used for sand blasting. In general, however, where the material is to be suspended in an air stream the metal should be crushed or ground to a, size of from 4 mesh to about 20 mesh.
Treatment of iron or steel surfaces may generally be carried out at ordinary temperatures, however, for certain purposes, where it is desired to accelerate the penetration of ferrophosphorus into the iron, it may be desirable to heat the metal, and also the ferrophosphorus particles in any suitable manner and then carry out may be of molecular dimensions and that minor amounts of the ferrophosphorus remain imbedded in or adhere to the iron or steel or other metal surface.
The ferrophosphorus employed in my invention may be the ordinary blast furnace type of metal known commonly as low metal which has a'phosphorus content in the neighborhood of 17% to 18%, or it may constitute the "high" metal as produced in the electric furnace. The
. "bigh metal normally runs from 22% to 25% or 26% or more in phosphorus, or it may constitute alloys of intermediate composition. In general I prefer to employ the so-called "high" metal, because it is somewhat more brittle and harder.
-' Also associated with the hosphorus are minor proportions of silicon and manganese, the silicon running from a fraction of a per cent to as much as 2 or 3%, and the manganese running from 1% to.2%.
the sand blasting at elevated temperatures. The temperatures may range upwardly'to as high a 500 C. to 600 C. or even higher, and may desirably include the critical temperature range of iron.
In general the finely divided ferrophosphorus is preferably employed as such as a sand blasting abrasive, however it may for 'certain purposes be mixed with other metallic and non-metallic abrasives, for the purpose of obtaining special effects.
What I claim is:
'1. The process of treating metal surfaces which are susceptible to rusting, comprising projecting upon said surfaces finely divided particles of ferrophosphorus at such a velocity that said surfaces are simultaneously cleaned and rendered rust resistant.
2. The process defined in claim 1 in which the ferrophosphorus employed contains from 22 to 26% of phosphorus.
3. The process of treating iron surfaces which are susceptible to rusting, comprising projecting finely divided particles of ferrophosphorus at high velocity upon said surfaces whereby said surfaces are cleaned and rendered rust resistant in a single operation;
or the various metals which maybe treatedbymy process I may say that generally any metal from which it is desired to remove dirty or CO1! roded surface coatings such as rust. grease, paint,
,etc., may be treated by my invention. The fine- 1y divided ferrophosphorus may be suspended in a rapidly moving stream of air as in ordinary sand blasting operations or it may be projected 7.'As a material for simultaneously cleaning and rust proofing metal surfaces, a "sand blasting" sand comprising finely divided ferrophosphorus.
- HERBERT J. KRASE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US406371A US2336020A (en) | 1941-08-11 | 1941-08-11 | Sandblasting process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US406371A US2336020A (en) | 1941-08-11 | 1941-08-11 | Sandblasting process |
Publications (1)
Publication Number | Publication Date |
---|---|
US2336020A true US2336020A (en) | 1943-12-07 |
Family
ID=23607691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US406371A Expired - Lifetime US2336020A (en) | 1941-08-11 | 1941-08-11 | Sandblasting process |
Country Status (1)
Country | Link |
---|---|
US (1) | US2336020A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3473943A (en) * | 1963-04-10 | 1969-10-21 | Asahi Chemical Ind | Explosive coating of metallic substrates with powder |
-
1941
- 1941-08-11 US US406371A patent/US2336020A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3473943A (en) * | 1963-04-10 | 1969-10-21 | Asahi Chemical Ind | Explosive coating of metallic substrates with powder |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3188776A (en) | Surface treatment of steel | |
US2622047A (en) | Ligno-cellulose aggregate and blast cleaning process employing the same | |
CN107671736A (en) | One kind improves steel plate impeller blasting technique | |
US4115076A (en) | Abrasive material suitable for manually blast cleaning ferrous metals prior to painting | |
US2359401A (en) | Metal powders | |
US4289541A (en) | Process of cleaning an austenitic steel surface | |
US2336020A (en) | Sandblasting process | |
US3020140A (en) | Compositions for metal surface reformation | |
USRE23861E (en) | Cladding metal | |
US2354727A (en) | Metal powder | |
US2077639A (en) | Process for hardening metallic surfaces | |
US2059915A (en) | Method of cleaning metal and material therefor | |
CN108161753A (en) | The shot blasting method of surface of steel plate | |
KR102460923B1 (en) | projectile | |
US2368282A (en) | Steel powder | |
US1549409A (en) | Sand blasting | |
US1678359A (en) | Method of treating metal articles | |
US2145756A (en) | Metallic blast material | |
CN101161848B (en) | Corrosion resisting alloy sand and preparation method thereof | |
US753610A (en) | Method of cleaning and coating pipes | |
DE102011086496B4 (en) | RADIANT AND A METHOD FOR PRODUCING THE RADIANT | |
JP5512854B2 (en) | Blasting material and blasting method | |
US2773339A (en) | Process for the surface treatment of light alloy components, more particularly for the abrasive blast treatment of light alloy castings | |
JP2016191131A (en) | Continuous surface treatment method of steel wire | |
US2184926A (en) | Metal blasting material and method of producing the same |