ITGE20100066A1 - METHOD FOR THE PAINTING OF METALLIC OBJECTS, AND PAINTING COMPOSITION FOR ITS IMPLEMENTATION. - Google Patents
METHOD FOR THE PAINTING OF METALLIC OBJECTS, AND PAINTING COMPOSITION FOR ITS IMPLEMENTATION. Download PDFInfo
- Publication number
- ITGE20100066A1 ITGE20100066A1 IT000066A ITGE20100066A ITGE20100066A1 IT GE20100066 A1 ITGE20100066 A1 IT GE20100066A1 IT 000066 A IT000066 A IT 000066A IT GE20100066 A ITGE20100066 A IT GE20100066A IT GE20100066 A1 ITGE20100066 A1 IT GE20100066A1
- Authority
- IT
- Italy
- Prior art keywords
- bath
- weight
- painting
- salt suitable
- paint stripping
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 15
- 239000000203 mixture Substances 0.000 title description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 14
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- PSHMSSXLYVAENJ-UHFFFAOYSA-N dilithium;[oxido(oxoboranyloxy)boranyl]oxy-oxoboranyloxyborinate Chemical compound [Li+].[Li+].O=BOB([O-])OB([O-])OB=O PSHMSSXLYVAENJ-UHFFFAOYSA-N 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 6
- 239000004317 sodium nitrate Substances 0.000 claims description 5
- 235000010344 sodium nitrate Nutrition 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 125000000896 monocarboxylic acid group Chemical group 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910011129 Li2B407 Inorganic materials 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 206010040943 Skin Ulcer Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
DESCRIZIONE del brevetto per invenzione industriale avente per titolo: “Metodo per la sverniciatura di oggetti metallici, e composizione di sverniciatura per la sua attuazione” DESCRIPTION of the patent for industrial invention entitled: "Method for stripping metal objects, and stripping composition for its implementation"
TESTO DELLA DESCRIZIONE TEXT OF THE DESCRIPTION
La presente invenzione ha per oggetto un metodo ed una composizione per la sverniciatura rapida di oggetti metallici anche di grandi dimensioni, quali ad esempio tubisteria e manufatti di bordo, radiatori, testate dei pistoni, separatori, teglie in alluminio, cancellate e serramenti, ed oggetti in ferro, alluminio e rame in genere. The present invention relates to a method and a composition for the rapid stripping of metal objects even of large dimensions, such as for example pipes and on-board products, radiators, piston heads, separators, aluminum trays, gates and doors and windows, and objects in iron, aluminum and copper in general.
Attualmente, i metodi più usati per la sverniciatura di oggetti metallici sono: Currently, the most used methods for stripping metal objects are:
-Sverniciatura con solventi, quali ad esempio il cloruro di metilene (CH2CI2), un potente solvente per bitumi, gomma, olii, resine, cere e un gran numero di composti organici. Si presenta come un liquido volatile, velenoso se respirato o anche solo quando viene a contatto con la pelle. A causa di queste problematiche ambientali e di salute personale il suo impiego oggi non è consentito in molti paesi. - Painting with solvents, such as methylene chloride (CH2CI2), a powerful solvent for bitumen, rubber, oils, resins, waxes and a large number of organic compounds. It occurs as a volatile liquid, poisonous when inhaled or even only when it comes into contact with the skin. Due to these environmental and personal health issues, its use is not permitted in many countries today.
-Sverniciatura con soluzioni di soda caustica (NaOH) a temperatura ambiente: queste soluzioni non sono efficaci su vernici catalizzate o nitrocellulosiche. - Painting with caustic soda (NaOH) solutions at room temperature: these solutions are not effective on catalyzed or nitrocellulose paints.
-Sverniciatura con acido solforico (H2SO4) al 98%: pericoloso e nocivo. L’acido solforico a queste concentrazioni può causare delle gravi ustioni ed ulcerazioni alla pelle, e pertanto deve essere manipolato con grande attenzione. Inoltre, il suo impiego presenta dei problemi ambientali ed economici per la successiva depurazione del bagno. -Dainting with 98% sulfuric acid (H2SO4): dangerous and noxious. Sulfuric acid at these concentrations can cause severe burns and skin ulcerations, and therefore must be handled with great care. Furthermore, its use presents environmental and economic problems for the subsequent purification of the bathroom.
- Trattamento in forni a 500°C e successiva microsabbiatura: questa tecnica richiede degli alti costi di esercizio e poca flessibilità. - Treatment in furnaces at 500 ° C and subsequent micro-sandblasting: this technique requires high operating costs and little flexibility.
Costituisce pertanto lo scopo principale della presente invenzione un metodo di sverniciatura di parti metalliche che sia rapido, efficiente, e che non presenti problematiche ambientali e di salute personale per gli operatori. Therefore, the main object of the present invention is a method of stripping metal parts which is rapid, efficient, and which does not present environmental and personal health problems for the operators.
Ulteriore scopo della presente invenzione è una composizione di sali atta alla attuazione di tale metodo. A further object of the present invention is a composition of salts suitable for carrying out this method.
Secondo una sua caratteristica, tale metodo comprende la fusione in vasche di acciaio a temperature dell’ordine di 350 a 500°C di una miscela formata dal 62 al 73% in peso, e preferibilmente dal 67% in peso di soda caustica (NaOH), dal 25 al 35% in peso, e preferibilmente dal 30% in peso di nitrato di sodio (NaN03) e dal 1 al 3% in peso, e preferibilmente dal 3% in peso di tetraborato di litio According to one of its characteristics, this method comprises the melting in steel tanks at temperatures of the order of 350 to 500 ° C of a mixture formed by 62 to 73% by weight, and preferably by 67% by weight of caustic soda (NaOH) , from 25 to 35% by weight, and preferably from 30% by weight of sodium nitrate (NaN03) and from 1 to 3% by weight, and preferably from 3% by weight of lithium tetraborate
(L12B4O7) ; la immersione per tempi molto brevi, dell’ordine di alcuni minuti, in tale bagno del manufatto metallico da sverniciare, la sua estrazione e la sua successiva immersione rapida in un bagno neutralizzante formato da una soluzione diluita di un acido e di preferenza di acido citrico [C3H4(OH) (C00H)3.H20]. (L12B4O7); the immersion for very short times, of the order of a few minutes, in this bath of the metal product to be stripped, its extraction and its subsequent rapid immersion in a neutralizing bath formed by a dilute solution of an acid and preferably of citric acid [C3H4 (OH) (C00H) 3.H20].
Grazie alla presenza tetraborato di litio, la temperatura di fusione del bagno di sali viene abbassata. Grazie alla presenza del nitrato di sodio, il bagno fuso è reso più fluido consentendo quindi una maggiore diffusione del bagno nei pezzi speciali e consente, nella fase di estrazione del pezzo dal bagno, un “colaggio” più veloce ed efficace dei sali fusi che bagnano il pezzo. Thanks to the presence of lithium tetraborate, the melting temperature of the salt bath is lowered. Thanks to the presence of sodium nitrate, the molten bath is made more fluid thus allowing a greater diffusion of the bath in the special pieces and allows, in the phase of extraction of the piece from the bath, a faster and more effective "pouring" of the molten salts that wet the piece.
Ulteriori scopi e vantaggi della presente invenzione appariranno meglio nel corso della seguente descrizione particolareggiata della stessa. Further objects and advantages of the present invention will become clearer in the course of the following detailed description thereof.
Esempio esecutivo Executive example
In una vasca di acciaio inossidabile del volume utile di 3-4 m<3>si introduce una miscela formata da 1340 Kg di soda caustica (NaOH), da 600 Kg di nitrato di sodio (NaN03) e da 60 Kg di tetraborato di litio (Li2B407). Tale miscela viene riscaldata a temperatura di 500°C sino a completa fusione. A mixture consisting of 1340 kg of caustic soda (NaOH), 600 kg of sodium nitrate (NaN03) and 60 kg of lithium tetraborate is introduced into a stainless steel tank with a useful volume of 3-4 m <3>. (Li2B407). This mixture is heated to a temperature of 500 ° C until it is completely melted.
In tale miscela fusa viene immerso, mediante l’ausilio di una gru, il manufatto da sverniciare, che viene pochi minuti dopo estratto completamente sverniciato e sgrassato, per essere immerso per brevissimo tempo in una vasca contenente una soluzione all ’ 1 % in volume di acido citrico, alla temperatura di 30 a 70°C. Il manufatto dopo questi trattamenti è perfettamente sverniciato e sgrassato in ogni sua parte, e non presenta “fioriture” dovute alla presenza di carbonato di sodio sulla superficie dei pezzi. The product to be stripped is immersed in this melted mixture, with the aid of a crane, which is completely stripped and degreased a few minutes later, to be immersed for a very short time in a tank containing a 1% by volume solution of citric acid, at a temperature of 30 to 70 ° C. After these treatments, the product is perfectly stripped and degreased in all its parts, and does not show “blooms” due to the presence of sodium carbonate on the surface of the pieces.
Il bagno di sverniciatura secondo l’invenzione ha una durata estremamente lunga in quanto viene integrato nei suoi componenti in funzione dell’avvenuto utilizzo. The paint stripping bath according to the invention has an extremely long life as it is integrated into its components according to the use.
Naturalmente la presente invenzione non è limitata agli esempi di realizzazione descritti, ma comprende tutte quelle varianti e modifiche rientranti nell’ambito più vasto del concetto inventivo, sostanzialmente come a seguito rivendicato. Of course, the present invention is not limited to the examples of embodiment described, but includes all those variants and modifications falling within the broader scope of the inventive concept, substantially as claimed below.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000066A ITGE20100066A1 (en) | 2010-06-17 | 2010-06-17 | METHOD FOR THE PAINTING OF METALLIC OBJECTS, AND PAINTING COMPOSITION FOR ITS IMPLEMENTATION. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000066A ITGE20100066A1 (en) | 2010-06-17 | 2010-06-17 | METHOD FOR THE PAINTING OF METALLIC OBJECTS, AND PAINTING COMPOSITION FOR ITS IMPLEMENTATION. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ITGE20100066A1 true ITGE20100066A1 (en) | 2011-12-18 |
Family
ID=43434609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT000066A ITGE20100066A1 (en) | 2010-06-17 | 2010-06-17 | METHOD FOR THE PAINTING OF METALLIC OBJECTS, AND PAINTING COMPOSITION FOR ITS IMPLEMENTATION. |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | ITGE20100066A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1160547A (en) * | 1980-08-01 | 1984-01-17 | Brian L. Radford | Method of stripping paint in a molten salt bath |
| WO2000044681A2 (en) * | 1999-02-01 | 2000-08-03 | The Curators Of The University Of Missouri | Method for preparing porous shells or gels from glass particles |
| US6309476B1 (en) * | 1999-05-24 | 2001-10-30 | Birchwood Laboratories, Inc. | Composition and method for metal coloring process |
| US6471788B1 (en) * | 1999-12-15 | 2002-10-29 | Lynntech Coatings, Ltd. | Ferrate conversion coatings for metal substrates |
| US20020193256A1 (en) * | 2001-01-26 | 2002-12-19 | Benchmark Research And Technology | Suspensions of particles in non-aqueous solvents |
| US20040250748A1 (en) * | 1999-05-24 | 2004-12-16 | Ravenscroft Keith N. | Composition and method for metal coloring process |
-
2010
- 2010-06-17 IT IT000066A patent/ITGE20100066A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1160547A (en) * | 1980-08-01 | 1984-01-17 | Brian L. Radford | Method of stripping paint in a molten salt bath |
| WO2000044681A2 (en) * | 1999-02-01 | 2000-08-03 | The Curators Of The University Of Missouri | Method for preparing porous shells or gels from glass particles |
| US6309476B1 (en) * | 1999-05-24 | 2001-10-30 | Birchwood Laboratories, Inc. | Composition and method for metal coloring process |
| US20040250748A1 (en) * | 1999-05-24 | 2004-12-16 | Ravenscroft Keith N. | Composition and method for metal coloring process |
| US6471788B1 (en) * | 1999-12-15 | 2002-10-29 | Lynntech Coatings, Ltd. | Ferrate conversion coatings for metal substrates |
| US20020193256A1 (en) * | 2001-01-26 | 2002-12-19 | Benchmark Research And Technology | Suspensions of particles in non-aqueous solvents |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2152013T3 (en) | PROCEDURE FOR LIXIVIATION OF MINERALS AT ATMOSPHERIC PRESSURE. | |
| BR112014028227A2 (en) | metal molding processing method and apparatus for plastic molding processing | |
| CN104562018B (en) | A kind of smokeless minute surface chemical polishing solution | |
| CN103882439B (en) | A kind of water-soluble metal degreasing derusting rust-proofing liquid and preparation method thereof | |
| ITGE20100066A1 (en) | METHOD FOR THE PAINTING OF METALLIC OBJECTS, AND PAINTING COMPOSITION FOR ITS IMPLEMENTATION. | |
| CN103695940B (en) | A kind of Water-soluble antioxidant derusting rust-proofing liquid and preparation method thereof | |
| MX2008014226A (en) | Method and composition for forming a coloured coating on a metallic surface. | |
| CN102766871B (en) | Silver-plated antitarnish protectant composition | |
| CN107474967A (en) | A kind of glass cleaner and preparation method thereof | |
| CN104294250A (en) | Solution formula and surface treatment method for conductive oxidation on aluminum alloy matrix | |
| CN107641815A (en) | A kind of highly effective antirust type ring protects agent for carbon hydrogen detergent and preparation method thereof | |
| ES2377835T3 (en) | Two or more step deraining process | |
| MX2018000797A (en) | Scale conditioning process for advanced high strength carbon steel alloys. | |
| CN107779594A (en) | A kind of technique for being segmented reducing leaching Africa heterogenite | |
| EP2487746A3 (en) | Electrode materials and method for their production | |
| CN103451716A (en) | Plating layer stripping corrosion solution | |
| CN105821411A (en) | Chemical stripping solution used for semiconductor manufacture procedure and preparing method of chemical stripping solution | |
| CN103695924B (en) | A kind of five metals salt spray resistance antirust solution and preparation method thereof | |
| CN103695916A (en) | Water-soluble antifouling antirust liquid and preparation method thereof | |
| CN104311458A (en) | Method for oxidizing symmetric thioether for preparation of sulfoxide | |
| CN103695917B (en) | A kind of Water-emulsion-type antirust liquid and preparation method thereof | |
| Jindra et al. | Etching and recovery of gold from aluminum substrate in thiourea solution | |
| CN104003444B (en) | A kind of method preparing dichloro vanadyl | |
| CN102747375A (en) | Paint remover for internal and external surface paint films of aluminum pop can and use method | |
| WO2015189262A1 (en) | A method for the chemical modification of polychlorinated biphenyls for improved affinity towards noble metal surfaces |