EP0240982A2 - Process for treating iron or steel surfaces - Google Patents
Process for treating iron or steel surfaces Download PDFInfo
- Publication number
- EP0240982A2 EP0240982A2 EP87105110A EP87105110A EP0240982A2 EP 0240982 A2 EP0240982 A2 EP 0240982A2 EP 87105110 A EP87105110 A EP 87105110A EP 87105110 A EP87105110 A EP 87105110A EP 0240982 A2 EP0240982 A2 EP 0240982A2
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- European Patent Office
- Prior art keywords
- guanidine
- mixed
- treatment
- solution
- imine
- 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.)
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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
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/76—Applying the liquid by spraying
Definitions
- the invention relates to a method for the treatment of iron or steel surfaces with the aid of solid blasting media which are mixed with an aqueous inhibitor-containing solution.
- wet blasting water-soluble corrosive salts that remain on the surface during dry blasting can also be removed.
- a disadvantage of wet blasting is that the freshly blasted surface is very clean and extremely reactive when wet. This promotes rust formation that is harmful for subsequent painting.
- a corrosion inhibitor such as sodium nitrite and polyphosphate
- sodium nitrite can very well reduce corrosion if the concentration is set correctly. But when used in too low Concentration will accelerate rust formation. If the concentration is too low, polyphosphate also allows rust formation. If the concentrations are too high or if they accumulate in the liquid phase and partially dry on the metal surface, the adhesion of the lacquer applied subsequently is unsatisfactory.
- the films produced on the metal surface with these corrosion inhibitors are water-soluble. If a water rinse is provided, they are therefore removed again from the iron or steel surface, with the result that the surface is again exposed to the corrosion attack.
- the object of the invention is to provide a method for the treatment of iron or steel surfaces with the aid of solid blasting media, which prevents rusting during blasting and after blasting, increases the adhesion of a subsequently applied lacquer and in particular results that are satisfactory over a wide concentration range of the inhibitor, regardless of whether the blasted surfaces are rinsed with water or not.
- the object is achieved by designing the method of the type mentioned at the outset in accordance with the invention in such a way that at least in the final phase of the treatment, abrasives are used which are mixed with a solution containing phosphate ions and imine or imide compound.
- the solution should be substantially free of metal, ammonium or amine cations that could be incorporated into the corrosion inhibiting layer formed.
- the solution is therefore most conveniently prepared by dissolving imine or imide phosphate, if appropriate with additional free phosphoric acid, or by dissolving phosphoric acid and water-soluble imine or imide compound, generally the carbonate compounds, in water.
- a nitrogen / carbon grouping is characteristic of imine or imide compounds, in which the NH group is bonded to one carbon atom by means of a double bond or to one carbon atom by means of two single bonds.
- the H atom on the nitrogen can optionally be substituted.
- Any compound that is soluble in phosphoric acid solution can be used.
- abrasives are used which are mixed with a solution containing phosphate ions and aminoguanidine, auramine, creatine, dicyandiamide, guanidine, phthalimide, pyrrole, pyrroline, pyrrolidine, rosindulin and / or triphenylguanidine.
- blasting media which are mixed with a solution containing phosphate ions and guanidine.
- blasting agents are used which are mixed with an additive of phosphoric acid and guanidine carbonate in a weight ratio (0.3 to 3): 1, preferably (0.5 to 0.75): l, solution obtained are added. Equivalent amounts are recommended when using other imine or imide compounds.
- the absolute amounts of active ingredients are not particularly critical. If the phosphoric acid concentration is above the optimal value, the major part of the excess phosphoric acid reacts with the iron or steel surface. Any residue that does not react is rinsed off, in particular if rinsing is provided. If the addition of guanidine or another imine or imide compound is more than the optimum, no real solution may be created, i.e. part of the addition remains unsolved. If the addition is not excessively high, there is no disadvantage from a technical point of view, only the process becomes uneconomical.
- a further advantageous embodiment of the invention consists in using blasting media which are mixed with a solution obtained by adding 0.2 to 4.5 g / l guanidine (calculated as guanidine carbonate). Particularly favorable concentrations are in the range from 1.5 to 2.5 g / l. If the solutions are too dilute, satisfactory corrosion protection will no longer be achieved. At excessively high concentrations, paint adhesion can be impaired.
- the duration of application of the method according to the invention depends on the condition of the metal surface to be treated. It can be used during the entire blast treatment, if necessary only in the final phase. This means that initially the wet radiation can only be carried out with the addition of water, and if necessary, it can also be blasted dry.
- the treatment time with the blasting agent mixed with a solution of phosphate ions and imine or imide compound should expediently be in the range from 6 seconds to 2 minutes.
- the treatment temperature is usually set to a value below 50 ° C, most advantageously to a value in the range from 10 to 25 ° C.
- Suitable abrasives are e.g. Steel shot or grit, stone grit or granular mineral slag.
- the pressure of the air / blasting agent jet should advantageously be 3.5 to 10 kg / cm2.
- the amount of aqueous solution is usually in the range of 0.5 to 5 l / min.
- Hot rolled steel was blasted with an air / mineral slag jet of 7 kg / cm2.
- An aqueous solution of 2 g / l was applied to this jet Guanidine carbonate and 1.32 g / l phosphoric acid (calculated as 100% acid) were added.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical Treatment Of Metals (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Bei einem Verfahren zur Behandlung von Eisen- oder Stahloberflächen mit Hilfe fester Strahlmittel setzt man zwecks Verbesserung des Korrosionsverhaltens und der Haftung eines ggf. aufgebrachten Lackes mindestens in der Endphase der Behandlung Strahlmittel ein, die mit einer Phosphationen und Imin- bzw. Imidverbindung enthaltenden wäßrigen Lösung versetzt sind. Besonders geeignete Imin- bzw. Imidverbindungen sind Aminoguanidin, Auramin, Kreatin, Dicyandiamid, Phthalimid, Pyrrol, Pyrrolin, Pyrrolidin, Rosindulin und/oder Triphenylguanidin, vorzugsweise Guanidin. Gemäß einer besonders vorteilhaften Ausgestaltung versetzt man das Strahlmittel mit einer durch Zugabe von Phosphorsäure und Guanidincarbonat im Gewichtsverhältnis (0,3 bis 3) : l, vorzugsweise (0,5 bis 0,75) : l, erhaltenen Lösung und stellt die Guanidinzugabe auf 0,2 bis 4,5 g/l, vorzugsweise l,5 bis 2,5 g/l (ber. als Guanidincarbonat), ein.In a process for the treatment of iron or steel surfaces with the aid of solid blasting media, in order to improve the corrosion behavior and the adhesion of any lacquer which may have been applied, at least in the final phase of the treatment, blasting media containing an aqueous solution containing phosphate ions and imine or imide compound are used are offset. Particularly suitable imine or imide compounds are aminoguanidine, auramine, creatine, dicyandiamide, phthalimide, pyrrole, pyrroline, pyrrolidine, rosindulin and / or triphenylguanidine, preferably guanidine. According to a particularly advantageous embodiment, the abrasive is mixed with a solution obtained by adding phosphoric acid and guanidine carbonate in a weight ratio (0.3 to 3): l, preferably (0.5 to 0.75): l, and the guanidine addition is set to 0 , 2 to 4.5 g / l, preferably 1.5 to 2.5 g / l (calc. As guanidine carbonate).
Description
Die Erfindung betrifft ein Verfahren zur Behandlung von Eisen- oder Stahloberflächen mit Hilfe fester Strahlmittel, die mit einer wäßrigen inhibitorhaltigen Lösung versetzt sind.The invention relates to a method for the treatment of iron or steel surfaces with the aid of solid blasting media which are mixed with an aqueous inhibitor-containing solution.
Es ist bekannt, Eisen- und Stahloberflächen mit Hilfe fester Strahlmittel zu behandeln, um dadurch insbesondere große Flächen zu reinigen und für die Lackierung und dergl. vorzubereiten. Dabei wird es zunehmend gebräuchlicher, aus Gesundheits-, Sicherheits- und Umweltschutzgründen dem Luft/Strahlmittel-Strahl Wasser zuzusetzen. Dadurch soll insbesondere die Staubbelästigung im Hinblick auf das Personal und die Umgebung vermindert werden. Ein weiterer Vorteil dieses häufig auch als "Naßstrahlen" bezeichneten Prozesses ist, daß auch wasserlösliche korrosive Salze, die beim Trockenstrahlen auf der Oberfläche verbleiben, beseitigt werden können. Ein Nachteil des Naßstrahlens ist jedoch, daß die frisch gestrahlte Oberfläche sehr rein und in feuchtem Zustand äußerst reaktiv ist. Dadurch ist eine für eine anschließende Lackierung schädliche Rostbildung begünstigt.It is known to treat iron and steel surfaces with the aid of solid abrasives, in order to thereby clean, in particular, large areas and to prepare them for painting and the like. It is becoming increasingly common to add water to the air / abrasive jet for health, safety and environmental reasons. This is particularly intended to reduce dust pollution with regard to personnel and the environment. Another advantage of this process, often referred to as "wet blasting", is that water-soluble corrosive salts that remain on the surface during dry blasting can also be removed. A disadvantage of wet blasting, however, is that the freshly blasted surface is very clean and extremely reactive when wet. This promotes rust formation that is harmful for subsequent painting.
Um diesen Nachteil zu beheben, ist es bekannt, dem Wasser einen Korrosionsinhibitor, wie Natriumnitrit und Polyphosphat, zuzusetzen. Beide Inhibitoren sind jedoch bezüglich der erforderlichen Konzentrationen sehr empfindlich. Beispielsweise kann Natriumnitrit die Korrosion bei richtiger Konzentrationseinstellung sehr wohl verringern. Aber bei Anwendung in zu niedriger Konzentration wird die Rostbildung beschleunigt. Polyphosphat läßt bei zu niedriger Konzentration die Rostbildung ebenfalls zu. Bei zu hohen Konzentrationen oder bei Anreicherung in der flüssigen Phase und teilweisem Auftrocknen auf der Metalloberfläche ist die Haftung des anschließend aufgebrachten Lackes unbefriedigend. Außerdem sind die mit diesen Korrosionsinhibitoren auf der Metalloberfläche erzeugten Filme wasserlöslich. Bei einer vorgesehenen Wasserspülung werden sie mithin von der Eisen- oder Stahloberfläche wieder entfernt, womit die Oberfläche erneut dem Korrosionsangriff ausgesetzt ist.To overcome this disadvantage, it is known to add a corrosion inhibitor such as sodium nitrite and polyphosphate to the water. However, both inhibitors are very sensitive to the concentrations required. For example, sodium nitrite can very well reduce corrosion if the concentration is set correctly. But when used in too low Concentration will accelerate rust formation. If the concentration is too low, polyphosphate also allows rust formation. If the concentrations are too high or if they accumulate in the liquid phase and partially dry on the metal surface, the adhesion of the lacquer applied subsequently is unsatisfactory. In addition, the films produced on the metal surface with these corrosion inhibitors are water-soluble. If a water rinse is provided, they are therefore removed again from the iron or steel surface, with the result that the surface is again exposed to the corrosion attack.
Aufgabe der Erfindung ist es, ein Verfahren zur Behandlung von Eisen- oder Stahloberflächen mit Hilfe fester Strahlmittel bereitzustellen, das ein Rosten während des Strahlens und nach dem Strahlen unterbindet, die Haftung eines nachträglich aufgebrachten Lackes erhöht und das insbesondere zu befriedigenden Resultaten über einen weiten Konzentrationsbereich des Inhibitors führt, gleichgültig, ob die gestrahlten Oberflächen mit Wasser gespült werden oder nicht.The object of the invention is to provide a method for the treatment of iron or steel surfaces with the aid of solid blasting media, which prevents rusting during blasting and after blasting, increases the adhesion of a subsequently applied lacquer and in particular results that are satisfactory over a wide concentration range of the inhibitor, regardless of whether the blasted surfaces are rinsed with water or not.
Die Aufgabe wird gelöst, indem das Verfahren der eingangs genannten Art entsprechend der Erfindung derart ausgestaltet wird, daß man mindestens in der Endphase der Behandlung Strahlmittel einsetzt, die mit einer Phosphationen und Imin- bzw. Imidverbindung enthaltenden Lösung versetzt sind.The object is achieved by designing the method of the type mentioned at the outset in accordance with the invention in such a way that at least in the final phase of the treatment, abrasives are used which are mixed with a solution containing phosphate ions and imine or imide compound.
Um zu vermeiden, daß die zugesetzte Lösung zu reaktiv ist, sollten aktivitätserhöhende Zusätze unterbleiben. Auch sollte die Lösung im wesentlichen frei von Metall-, Ammonium- oder Aminkationen sein, die in die gebildete korrosionsinhibierende Schicht eingebaut werden könnten.In order to avoid that the added solution is too reactive, activity-increasing additives should be avoided. Also the solution should be substantially free of metal, ammonium or amine cations that could be incorporated into the corrosion inhibiting layer formed.
Daher wird die Lösung am zweckmäßigsten durch Auflösen von Imin- bzw. Imidphosphat, ggf. mit zusätzlicher freier Phosphorsäure, oder durch Auflösen von Phosphorsäure und wasserlöslicher Imin- bzw. Imidverbindung, im allgemeinen der Carbonatverbindungen, in Wasser hergestellt.The solution is therefore most conveniently prepared by dissolving imine or imide phosphate, if appropriate with additional free phosphoric acid, or by dissolving phosphoric acid and water-soluble imine or imide compound, generally the carbonate compounds, in water.
Für Imin- bzw. Imidverbindungen ist eine Stickstoff/Kohlenstoff-Gruppierung charakteristisch, bei der die NH-Gruppe mittels einer Doppelbindung an ein Kohlenstoffatom oder mittels zweier Einfachbindungen an je ein Kohlenstoffatom gebunden ist. Das am Stickstoff befindliche H-Atom kann ggf. substituiert sein. Es kann jede Verbindung verwendet werden, die in phosphorsaurer Lösung löslich ist. Gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung setzt man Strahlmittel ein, die mit einer Phosphationen und Aminoguanidin, Auramin, Kreatin, Dicyandiamid, Guanidin, Phthalimid, Pyrrol, Pyrrolin, Pyrrolidin, Rosindulin und/oder Triphenylguanidin enthaltenden Lösung versetzt sind.A nitrogen / carbon grouping is characteristic of imine or imide compounds, in which the NH group is bonded to one carbon atom by means of a double bond or to one carbon atom by means of two single bonds. The H atom on the nitrogen can optionally be substituted. Any compound that is soluble in phosphoric acid solution can be used. According to a particularly advantageous embodiment of the invention, abrasives are used which are mixed with a solution containing phosphate ions and aminoguanidine, auramine, creatine, dicyandiamide, guanidine, phthalimide, pyrrole, pyrroline, pyrrolidine, rosindulin and / or triphenylguanidine.
Besonders günstig ist es, Strahlmittel einzusetzen, die mit einer Phosphationen und Guanidin enthaltenden Lösung versetzt sind.It is particularly favorable to use blasting media which are mixed with a solution containing phosphate ions and guanidine.
Gemäß einer weiteren zweckmäßigen Ausführungsform der Erfindung verwendet man Strahlmittel, die mit einer durch Zugabe von Phosphorsäure und Guanidincarbonat im Gewichtsverhältnis (0,3 bis 3) : l, vorzugsweise (0,5 bis 0,75) : l, erhaltenen Lösung versetzt sind. Bei Verwendung anderer Imin- bzw. Imidverbindungen werden äquivalente Mengen empfohlen.According to a further expedient embodiment of the invention, blasting agents are used which are mixed with an additive of phosphoric acid and guanidine carbonate in a weight ratio (0.3 to 3): 1, preferably (0.5 to 0.75): l, solution obtained are added. Equivalent amounts are recommended when using other imine or imide compounds.
Die Absolutmengen an wirkamen Bestandteilen sind nicht besonders kritisch. Wenn die Phosphorsäurekonzentration oberhalb des optimalen Wertes liegt, reagiert der überwiegender Teil des Phosphorsäureüberschusses mit der Eisen- oder Stahloberfläche. Ein ggf. nicht reagierender Rest wird abgespült, insbesondere wenn eine Nachspülung vorgesehen ist. Sollte der Zusatz an Guanidin bzw. an einer anderen Imin- bzw. Imidverbindung mehr als das Optimum betragen, entsteht ggf. keine echte Lösung, d.h. ein Teil des Zusatzes verbleibt ungelöst. Sofern der Zusatz nicht übermäßig hoch ist, entsteht aus technischer Sicht kein Nachteil, nur wird das Verfahren unökonomisch.The absolute amounts of active ingredients are not particularly critical. If the phosphoric acid concentration is above the optimal value, the major part of the excess phosphoric acid reacts with the iron or steel surface. Any residue that does not react is rinsed off, in particular if rinsing is provided. If the addition of guanidine or another imine or imide compound is more than the optimum, no real solution may be created, i.e. part of the addition remains unsolved. If the addition is not excessively high, there is no disadvantage from a technical point of view, only the process becomes uneconomical.
Eine weitere vorteilhafte Ausführungsform der Erfindung besteht darin, Strahlmittel einzusetzen, die mit einer durch Zugabe von 0,2 bis 4,5 g/l Guanidin (ber. als Guanidincarbonat) erhaltenen Lösung versetzt sind. Besonders günstige Konzentrationen liegen im Bereich von l,5 bis 2,5 g/l. Falls die Lösungen zu verdünnt sind, wird kein zufriedenstellender Korrosionsschutz mehr erzielt. Bei übermäßig hohen Konzentrationen kann die Lackhaftung beeinträchtigt sein.A further advantageous embodiment of the invention consists in using blasting media which are mixed with a solution obtained by adding 0.2 to 4.5 g / l guanidine (calculated as guanidine carbonate). Particularly favorable concentrations are in the range from 1.5 to 2.5 g / l. If the solutions are too dilute, satisfactory corrosion protection will no longer be achieved. At excessively high concentrations, paint adhesion can be impaired.
Nach dem derzeitigen Kenntnisstand entstehen bei Anwendung des erfindungsgemäßen Verfahrens chemisch gebundene Überzüge, die Eisen, Imin bzw. Imid und Phosphat enthalten.According to the current state of knowledge, when using the method according to the invention, chemically bound coatings are formed which contain iron, imine or imide and phosphate.
Die Anwendungsdauer des erfindungsgemäßen Verfahrens richtet sich nach dem Zustand der zu behandelnden Metalloberfläche. Es kann während der gesamten Strahlbehandlung, ggf. auch erst in der Endphase, eingesetzt werden. Das heißt, anfangs kann eventuell die Naßstrahlung nur unter Zugabe von Wasser erfolgen, ggf. kann auch trocken gestrahlt werden.The duration of application of the method according to the invention depends on the condition of the metal surface to be treated. It can be used during the entire blast treatment, if necessary only in the final phase. This means that initially the wet radiation can only be carried out with the addition of water, and if necessary, it can also be blasted dry.
Die Behandlungsdauer mit dem mit einer Lösung von Phosphationen und Imin- bzw. Imidverbindung versetzten Strahlmittel sollte zweckmäßigerweise im Bereich von 6 sec bis 2 min liegen. Die Behandlungstemperatur wird üblicherweise auf einen Wert unterhalb 50°C, am vorteilhaftesten auf einen Wert im Bereich von l0 bis 25°C eingestellt.The treatment time with the blasting agent mixed with a solution of phosphate ions and imine or imide compound should expediently be in the range from 6 seconds to 2 minutes. The treatment temperature is usually set to a value below 50 ° C, most advantageously to a value in the range from 10 to 25 ° C.
Im übrigen erfolgt die Durchführung des Naßstrahlens in konventioneller Weise. Geeignete Strahlmittel sind z.B. Stahlschrot oder -grieß, Gesteinsgrieß oder gekörnte Mineralschlacke. Der Druck des Luft/Strahlmittel-Strahles sollte zweckmäßigerweise 3,5 bis l0 kg/cm² betragen. Die Menge an wäßriger Lösung liegt üblicherweise im Bereich von 0,5 bis 5 l/min.Otherwise, the wet blasting is carried out in a conventional manner. Suitable abrasives are e.g. Steel shot or grit, stone grit or granular mineral slag. The pressure of the air / blasting agent jet should advantageously be 3.5 to 10 kg / cm². The amount of aqueous solution is usually in the range of 0.5 to 5 l / min.
Die Erfindung wird anhand des Beispiels beispielsweise und näher erläutert.The invention is explained by way of example and in more detail.
Warmgewalzter Stahl wurde mit einem Luft/Mineralschlacke-Strahl von 7 kg/cm² gestrahlt. Diesem Strahl wurde eine wäßrige Lösung von 2 g/l Guanidincarbonat und l,32 g/l Phosphorsäure (ber. als l00%ige Säure) zugesetzt.Hot rolled steel was blasted with an air / mineral slag jet of 7 kg / cm². An aqueous solution of 2 g / l was applied to this jet Guanidine carbonate and 1.32 g / l phosphoric acid (calculated as 100% acid) were added.
Nach der Behandlung, der ggf. eine Wasserspülung folgte, ließ man die Oberfläche trocknen. Anschließend wurde lackiert. Es wurde festgestellt, daß vor der Lackierung keine merkliche Rostbildung auftrat und der Lack selbst gut haftete.After the treatment, which was possibly followed by a water rinse, the surface was allowed to dry. Then it was painted. It was found that no noticeable rust formation occurred before the painting and the paint itself adhered well.
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8608797 | 1986-04-11 | ||
| GB868608797A GB8608797D0 (en) | 1986-04-11 | 1986-04-11 | Compositions for abrasive blast cleaning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0240982A2 true EP0240982A2 (en) | 1987-10-14 |
| EP0240982A3 EP0240982A3 (en) | 1989-03-22 |
Family
ID=10596016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87105110A Withdrawn EP0240982A3 (en) | 1986-04-11 | 1987-04-07 | Process for treating iron or steel surfaces |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4729770A (en) |
| EP (1) | EP0240982A3 (en) |
| JP (1) | JPS62243787A (en) |
| DE (1) | DE3711636C2 (en) |
| GB (2) | GB8608797D0 (en) |
| PT (1) | PT84664B (en) |
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|---|---|---|---|---|
| GB2250608B (en) * | 1990-10-26 | 1994-11-30 | Ricoh Kk | Surface machining method for electrophotographic photoconductor |
| US5439527A (en) * | 1991-08-28 | 1995-08-08 | The Tdj Group, Inc. | Method for fixing blast/cleaning waste |
| US5266122A (en) * | 1991-08-28 | 1993-11-30 | The Tdj Group, Inc. | Method for fixing blast/cleaning waste |
| US5344472A (en) * | 1991-09-12 | 1994-09-06 | Lynn William R | Method of recycling media for use in pressurized device |
| US5527203A (en) * | 1992-08-28 | 1996-06-18 | Cook; Jack R. | Method for removal of surface contaminants from metal substrates |
| US5441441A (en) * | 1992-08-28 | 1995-08-15 | Cook; Jack R. | Method for removal of surface contaminants from concrete substrates |
| US5317841A (en) * | 1992-08-28 | 1994-06-07 | Whitemetal, Inc. | Method for removal of surface contaminants from metal substrates |
| AU5093093A (en) * | 1992-08-28 | 1994-03-29 | Whitemetal, Inc. | Method for removal of surface contaminants from substrates |
| JP2599240B2 (en) * | 1992-10-21 | 1997-04-09 | 新日本製鐵株式会社 | Rust prevention method of abrasive in high-speed polishing fluid jet |
| US5681205A (en) * | 1993-08-12 | 1997-10-28 | Church & Dwight Co., Inc. | Method of using abrasive blast media containing corrosion inhibitor |
| US5575705A (en) * | 1993-08-12 | 1996-11-19 | Church & Dwight Co., Inc. | Slurry blasting process |
| US5529589A (en) * | 1994-09-02 | 1996-06-25 | Technology Trust Inc. | Fiber media blasting material, method of recycling same, and equipment for discharging same |
| WO1997014760A1 (en) * | 1995-10-17 | 1997-04-24 | Chesapeake Specialty Products | Method for processing iron-containing materials and products produced thereby |
| US5827114A (en) * | 1996-09-25 | 1998-10-27 | Church & Dwight Co., Inc. | Slurry blasting process |
| US6117249A (en) * | 1998-02-13 | 2000-09-12 | Kerk Motion Products, Inc. | Treating metallic machine parts |
| DE10255213B4 (en) * | 2002-11-27 | 2006-01-26 | Daimlerchrysler Ag | Process for the pretreatment of surfaces for thermally sprayed coatings |
| JP6249929B2 (en) * | 2014-03-27 | 2017-12-20 | 株式会社神戸製鋼所 | Continuous surface treatment method for steel wire |
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| FR973895A (en) * | 1947-10-24 | 1951-02-15 | Bataafsche Petroleum | Material treatment process, in particular packaging |
| FR1099691A (en) * | 1952-12-31 | 1955-09-08 | Parker Ste Continentale | Agent for the preparation of phosphating solutions |
| FR1099952A (en) * | 1953-12-30 | 1955-09-14 | Parker Ste Continentale | Improvement in the preparation of phosphating solutions |
| DE2407244A1 (en) * | 1974-02-15 | 1975-09-04 | Vaq Fos Ltd | Metal surface treatment - by blasting with mixt. contg. phosphate and aq. acidic soln. |
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|---|---|---|---|---|
| US1549409A (en) * | 1921-06-22 | 1925-08-11 | James H Gravell | Sand blasting |
| GB712238A (en) * | 1950-04-29 | 1954-07-21 | Air Reduction | Improvements in methods of gas shielded arc welding of aluminium and aluminium alloys |
| GB712271A (en) * | 1950-04-29 | 1954-07-21 | Air Reduction | Improvements in the preparation of aluminium wire for use in the gas-shielded arc welding method |
| GB710096A (en) * | 1951-03-13 | 1954-06-09 | Kuno Lodewijk Van Der Horst | Improvements relating to the electroplating of aluminium and alloys thereof |
| DE962489C (en) * | 1954-02-10 | 1957-04-25 | Dehydag Gmbh | Saver pickling agent to protect metals when treated with acidic agents |
| US3313067A (en) * | 1964-10-20 | 1967-04-11 | Gen Electric | Process for deflashing articles |
| DE1546151A1 (en) * | 1965-03-22 | 1969-05-14 | Collardin Gmbh Gerhard | Process for cleaning heating surfaces of circulating regenerative preheaters |
| US3329619A (en) * | 1965-08-02 | 1967-07-04 | United States Steel Corp | Pickling ferrous metal |
| US3909200A (en) * | 1967-05-22 | 1975-09-30 | Petrolite Corp | Use of guanidine derived compounds as corrosion inhibitors |
| US3532591A (en) * | 1967-11-28 | 1970-10-06 | Gen Electric | Etching silicide coatings and article formed therefrom |
| GB1308433A (en) * | 1970-01-16 | 1973-02-21 | Toyo Ink Mfg Co | Method for cleaning metal surface |
| GB1377484A (en) * | 1970-12-14 | 1974-12-18 | Hempels Skibsfarvefabrik As J | Method of and composition for the blast cleaning and the simultan eous corrosion-protection of metal surfaces |
| GB1362783A (en) * | 1971-07-23 | 1974-08-07 | Burmah Oil Trading Ltd | Concrete removal |
| US4125969A (en) * | 1977-01-25 | 1978-11-21 | A. Long & Company Limited | Wet abrasion blasting |
| JPS544834A (en) * | 1977-06-14 | 1979-01-13 | Nitto Chem Ind Co Ltd | Corrosion inhibitor |
| US4333743A (en) * | 1977-10-25 | 1982-06-08 | Nojimagumi Co., Ltd. | Sand-blasting abrasive materials and method of producing the same |
| JPS563180A (en) * | 1979-05-17 | 1981-01-13 | Fuji Seiki Seizosho:Kk | Injection type burr remover |
| US4666465A (en) * | 1982-10-15 | 1987-05-19 | Fuji Seiki Machine Works, Ltd. | Process for manufacturing fine blasting media for use in wet blasting |
| US4479917A (en) * | 1983-11-14 | 1984-10-30 | Olin Corporation | Use of aminoguanidine compounds as oxygen-scavenging and corrosion-inhibiting agents |
| US4519811A (en) * | 1984-05-24 | 1985-05-28 | Societe Nationale De L'amiante | Calcined serpentine useful as sandblasting agent |
-
1986
- 1986-04-11 GB GB868608797A patent/GB8608797D0/en active Pending
- 1986-12-17 JP JP61299020A patent/JPS62243787A/en active Pending
-
1987
- 1987-04-06 US US07/034,830 patent/US4729770A/en not_active Expired - Fee Related
- 1987-04-06 GB GB8708190A patent/GB2189261B/en not_active Expired - Fee Related
- 1987-04-07 EP EP87105110A patent/EP0240982A3/en not_active Withdrawn
- 1987-04-07 DE DE3711636A patent/DE3711636C2/en not_active Expired - Lifetime
- 1987-04-10 PT PT84664A patent/PT84664B/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR973895A (en) * | 1947-10-24 | 1951-02-15 | Bataafsche Petroleum | Material treatment process, in particular packaging |
| FR1099691A (en) * | 1952-12-31 | 1955-09-08 | Parker Ste Continentale | Agent for the preparation of phosphating solutions |
| FR1099952A (en) * | 1953-12-30 | 1955-09-14 | Parker Ste Continentale | Improvement in the preparation of phosphating solutions |
| DE2407244A1 (en) * | 1974-02-15 | 1975-09-04 | Vaq Fos Ltd | Metal surface treatment - by blasting with mixt. contg. phosphate and aq. acidic soln. |
| FR2387296A1 (en) * | 1977-04-12 | 1978-11-10 | Akzo Nv | PROCESS FOR CLEANING A METAL SURFACE AND PROTECTING IT AGAINST CORROSION |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2189261B (en) | 1990-08-01 |
| DE3711636A1 (en) | 1987-10-22 |
| GB2189261A (en) | 1987-10-21 |
| PT84664A (en) | 1987-05-01 |
| GB8708190D0 (en) | 1987-05-13 |
| US4729770A (en) | 1988-03-08 |
| GB8608797D0 (en) | 1986-05-14 |
| EP0240982A3 (en) | 1989-03-22 |
| DE3711636C2 (en) | 1995-03-16 |
| JPS62243787A (en) | 1987-10-24 |
| PT84664B (en) | 1989-11-30 |
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