GB466661A - Process of cleaning metal surfaces - Google Patents
Process of cleaning metal surfacesInfo
- Publication number
- GB466661A GB466661A GB509037A GB509037A GB466661A GB 466661 A GB466661 A GB 466661A GB 509037 A GB509037 A GB 509037A GB 509037 A GB509037 A GB 509037A GB 466661 A GB466661 A GB 466661A
- Authority
- GB
- United Kingdom
- Prior art keywords
- articles
- vitreous
- parts
- coatings
- metal
- 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
- 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
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
Landscapes
- 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)
- ing And Chemical Polishing (AREA)
Abstract
Scale, sand, grease, oil, and surface coatings such as paint, lacquer, vitreous and non-vitreous enamels, tin, zinc, and cadmium platings are removed from metal articles, e.g. ferrous, cuprous, or aluminous articles, by immersion in a molten bath comprising one or more of the alkali metal nitrates, one or more of the alkali metal carbonates and hydroxides, and a fluxing agent such as manganese dioxide or copper sulphate, the nitrate or nitrates being the preponderating constituent of the mixture. The treated articles may be washed with water or an aqueous solution containing one or more of the substances hydrochloric acid, sulphuric acid, oxalic acid, and iron sulphate. The molten bath forms a surface coating on the articles which forms a good base for paint, lacquer, non-vitreous and vitreous enamels and coatings of metal such as zinc, tin, cadmium, copper, or nickel. Baths may be formed, for example, of (a) 5 parts of sodium nitrate, 5 parts of potassium nitrate, and 1 per cent of sodium hydroxide, or (b) 65 parts of potassium nitrate and 34 parts of sodium hydroxide, 0,2--10 per cent of manganese dioxide or copper sulphate being added in each case. Directions are given showing the temperature and the duration of treatment required for removing various surface coatings. It is stated that metal coatings removed are usually precipitated, mostly in combined form, as a sludge which can be removed, but may appear in molten metallic form. When removing vitreous enamel the removed material may be precipitated by introducing steam. Reference is made to the treatment of sheets, castings, and small articles such as screws, bolts, nuts, and washers. Specifications 14462/89, [Class 82], and 464,982 are referred to.ALSO:Scale, sand, grease, oil, and surface coatings such as paint, lacquer, vitreous and non-vitreous enamels, tin, zinc, and cadmium platings are removed from metal articles, e.g. ferrous, cuprous, or aluminous articles, by immersion in a molten bath comprising one or more of the alkali metal nitrates, one or more of the alkali metal carbonates and hydroxides, and a fluxing agent such as manganese dioxide or copper sulphate, the nitrate or nitrates being the preponderating constituent of the mixture. The treated articles may be washed with water or an aqueous solution containing one or more of the substances hydrochloric acid, sulphuric acid, oxalic acid, and iron sulphate. The molten bath forms a surface coating on the articles which forms a good base for paint, lacquer, non-vitreous and vitreous enamels, and coatings of metal such as zinc, tin, cadmium, copper, or nickel. Baths may be formed, for example, of (a) 5 parts of sodium nitrate, 5 parts of potassium nitrate, and 1 per cent of sodium hydroxide, or (b) 65 parts of potassium nitrate and 34 parts of sodium hydroxide, 0,2-10 per cent of manganese dioxide or copper sulphate being added in each case. Directions are given showing the temperature and the duration of treatment required for removing various surface coatings. It is stated that metal coatings removed are usually precipitated, mostly in combined form, as a sludge which can be removed, but may appear in molten metallic form. When removing vitreous enamel the removed material may be precipitated by introducing steam. Reference is made to the treatment of sheets, castings, and small articles such as screws, bolts, nuts, and washers. Specifications 14462/89, [Class 82], and 464,982 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB509037A GB466661A (en) | 1935-10-26 | 1935-10-26 | Process of cleaning metal surfaces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB509037A GB466661A (en) | 1935-10-26 | 1935-10-26 | Process of cleaning metal surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
GB466661A true GB466661A (en) | 1937-05-26 |
Family
ID=9789575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB509037A Expired GB466661A (en) | 1935-10-26 | 1935-10-26 | Process of cleaning metal surfaces |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB466661A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2458661A (en) * | 1944-01-29 | 1949-01-11 | J H Shoemaker | Process of cleaning metal surfaces and compositions therefor |
US2538702A (en) * | 1944-06-02 | 1951-01-16 | Freeport Sulphur Co | Metal surface cleaning |
US2567456A (en) * | 1947-04-07 | 1951-09-11 | J H Shoemaker | Metal cleaning composition and process |
US2630393A (en) * | 1948-06-25 | 1953-03-03 | Charles B Francis | Method of cleaning and descaling ferrous bodies |
US2641559A (en) * | 1948-09-08 | 1953-06-09 | United States Steel Corp | Method of cleaning and descaling ferrous articles and a bath therefor |
US2891848A (en) * | 1956-10-25 | 1959-06-23 | Albert L Jaffe | Separation of metals |
DE1231085B (en) * | 1961-02-23 | 1966-12-22 | Degussa | Process for removing synthetic resins, paints and the like Like. Of metal parts, especially hardened steel molds |
-
1935
- 1935-10-26 GB GB509037A patent/GB466661A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2458661A (en) * | 1944-01-29 | 1949-01-11 | J H Shoemaker | Process of cleaning metal surfaces and compositions therefor |
US2538702A (en) * | 1944-06-02 | 1951-01-16 | Freeport Sulphur Co | Metal surface cleaning |
US2567456A (en) * | 1947-04-07 | 1951-09-11 | J H Shoemaker | Metal cleaning composition and process |
US2630393A (en) * | 1948-06-25 | 1953-03-03 | Charles B Francis | Method of cleaning and descaling ferrous bodies |
US2641559A (en) * | 1948-09-08 | 1953-06-09 | United States Steel Corp | Method of cleaning and descaling ferrous articles and a bath therefor |
US2891848A (en) * | 1956-10-25 | 1959-06-23 | Albert L Jaffe | Separation of metals |
DE1231085B (en) * | 1961-02-23 | 1966-12-22 | Degussa | Process for removing synthetic resins, paints and the like Like. Of metal parts, especially hardened steel molds |
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