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DE4021466A1 - Restoring damaged areas of enamel layer in steel tanks - by spraying abrasive agent, esp. corundum, applying protection layer by plasma or detonation spraying etc. - Google Patents

Restoring damaged areas of enamel layer in steel tanks - by spraying abrasive agent, esp. corundum, applying protection layer by plasma or detonation spraying etc.

Info

Publication number
DE4021466A1
DE4021466A1 DE4021466A DE4021466A DE4021466A1 DE 4021466 A1 DE4021466 A1 DE 4021466A1 DE 4021466 A DE4021466 A DE 4021466A DE 4021466 A DE4021466 A DE 4021466A DE 4021466 A1 DE4021466 A1 DE 4021466A1
Authority
DE
Germany
Prior art keywords
layer
esp
pores
corundum
metallic
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.)
Withdrawn
Application number
DE4021466A
Other languages
German (de)
Inventor
Des Erfinders Auf Nennung Verzicht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAYERNWALD FRUECHTEVERWERTUNG
Original Assignee
BAYERNWALD FRUECHTEVERWERTUNG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BAYERNWALD FRUECHTEVERWERTUNG filed Critical BAYERNWALD FRUECHTEVERWERTUNG
Priority to DE4021466A priority Critical patent/DE4021466A1/en
Publication of DE4021466A1 publication Critical patent/DE4021466A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23DENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D13/00After-treatment of the enamelled articles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

In this method the affected site is subjected to the effects of a sprayed abrasive agent, esp corundum, blasted on by air or water pressure or a mixt. of the two. The area in the immediate vicinity of the damage (2-30 mm around the periphery) is also cleansed by blasting with a shape-edged abrasive. The protective layer is applied next by plasma or detonation spraying, powder-flame or wire-flame or electric arc methods. The pores of the covering layer thus produced are then closed by mechanical working esp. brushing with a metallic or non-metal powder. Alternatively, the pore closing can be effected by a sealant, esp. one based on poly-methylmethacrylate or epoxy resin. USE/ADVANTAGE - Useful for mending steel tanks coated with enamel, as used in the food industry. Cheap and simple method.

Description

Die Erfindung betrifft ein Verfahren zur Regeneration von Schadstellen der Emaille-Schicht in emaillierten Tanks aus Stahl, für welche die Bestimmungen der Lebensmittel­ industrie gelten.The invention relates to a method for the regeneration of Damaged areas of the enamel layer in enamelled tanks made of steel, for which the provisions of the food industry apply.

Bei emaillebeschichteten Tanks aus Stahl geschieht es häufig, daß die Emaille-Schicht in bestimmten Bereichen abgestoßen oder in sonstiger Weise beschädigt wird, so daß Schadstellen entstehen und der Tanks als solcher zur Aufbewahrung von Lebensmitteln oder dergleichen nicht mehr geeignet ist.It happens with enamel-coated steel tanks often that the enamel layer in certain areas repelled or otherwise damaged, so that damage occurs and the tanks as such No more storing food or the like suitable is.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Verfahren anzugeben, mittels dessen die entsprechenden Schadstellen beseitigt werden und der Tank seiner zweckgemäßen Bestimmung wieder zugeführt werden kann. The invention is based on this prior art the task of specifying a method by means of the corresponding damaged areas are eliminated and the tank returned to its intended purpose can be.  

Dadurch daß die Schadstelle mit Strahlmittel, insbesondere Korund, gestrahlt und aufgerauht wird, erfolgt praktisch eine Haftgrundvorbereitung, die das nachträgliche Auftragen der metallischen Deckschicht mittels thermischer Spritzver­ fahren ermöglicht und eine intensive Haftung der Deckschicht auf dem Untermaterial gewährleistet.Characterized in that the damaged area with blasting media, in particular Corundum, blasted and roughened is practically done a primer preparation, which the subsequent application the metallic cover layer by means of thermal spraying allows driving and an intensive adhesion of the top layer guaranteed on the base material.

Da die Deckschicht üblicherweise mikroporös ist, ist eine nachfolgende Behandlung oder Bearbeitung der Deckschicht erforderlich, wozu eine mechanische Verdichtung oder ein Tränken mit Versieglern vorgesehen werden kann. Bei einer mechanischen Verdichtung werden die Poren durch Umformung des Materials geschlossen, während bei einem Tränken mit Versiegler das Versieglungsmaterial in die Poren eindringt und dort gegen mechanische Reinigungsmittel oder dergleichen geschützt angeordnet ist, so daß er dauerhaft die Poren verschließen kann.Since the top layer is usually microporous, one is subsequent treatment or processing of the top layer required, for which a mechanical compression or a Watering with sealers can be provided. At a mechanical compression, the pores are formed of the material closed while having a soak Sealer the sealing material penetrates into the pores and there against mechanical cleaning agents or the like is arranged so that it permanently protects the pores can close.

Eine bevorzugte Weiterbildung wird darin gesehen, daß die örtlich neben der Schadstelle befindlichen Bereiche eben­ falls mit scharfkantigem Strahlmittel gestrahlt werden, und zwar insbesondere die Randfläche der noch an die Tank­ wandung haftenden Emaille-Schicht in einer Entfernung von 2 bis 30 mm vom Schadstellenrand aufgerauht wird.A preferred further development is seen in the fact that areas located next to the damaged area if blasting is carried out with a sharp-edged abrasive,  specifically the edge of the tank Adhesive layer adhering to the wall at a distance of Is roughened 2 to 30 mm from the edge of the damaged area.

Die entsprechende Fläche des Tanks im Bereich der Schad­ stelle kann durch Strahlen mit dem Schleuderrad, mit Druck­ luft/Strahlmittelgemisch oder Druckluft/Strahlmittel/Wasser­ gemisch aufgerauht werden. Durch die Einbeziehung der Rand­ flächen der noch haftenden Emaille-Schicht wird ein Über­ deckungsbereich geschaffen, der Undichtigkeiten im Bereich der Anschlußstellen vermeidet.The corresponding area of the tank in the area of damage can be blasted with the blast wheel, with pressure air / blasting media mixture or compressed air / blasting media / water be roughened. By including the edge areas of the still adhering enamel layer becomes an over created coverage area, the leaks in the area avoiding the connection points.

Die im Wege des thermischen Spritzverfahrens aufgebrachten Deckschichten können beispielsweise durch Tiegelspritzen, Pulver-Flamm-, Draht-Flamm-, Zweidraht-Lichtbogen-, Mehr­ draht-Lichtbogen-, Plasma-oder Detonationsspritzen erfolgen.The applied by thermal spraying Cover layers can, for example, by crucible spraying, Powder flame, wire flame, two-wire arc, more Wire arc, plasma or detonation syringes are carried out.

Bevorzugt ist ferner vorgesehen, daß die Poren der mikro­ porösen Deckschicht durch mechanische Bearbeitung, insbe­ sondere Bürsten, vornehmlich mit metallischen und/oder nichtmetallischen Arbeitsmitteln geschlossen werden.It is also preferably provided that the pores of the micro porous cover layer by mechanical processing, esp  special brushes, mainly with metallic and / or non-metallic work equipment.

Das Schließen der Poren kann beispielsweise durch Bürsten mit metallischen oder nichtmetallischen Bürstenkörpern geschehen.The pores can be closed, for example, by brushing with metallic or non-metallic brush bodies happen.

Alternativ oder zusätzlich kann vorgesehen sein, daß die Poren der Deckschicht mit Porenversiegler, insbesondere auf Basis von Polymethacrylat oder Epoxidharz, versiegelt werden.Alternatively or additionally, it can be provided that the Pores of the top layer with pore sealer, in particular based on polymethacrylate or epoxy resin, sealed will.

Eine bevorzugte Schichtausbildung wird darin gesehen, daß als thermische Deckschicht eine Einfachschicht aus Al 99,5; AlMg3; AlMg5; Cu 99; Cu 99,5; Ni/Al, Ni/Ti bzw. einer Mischung aus Al2O3 und TiO2 aufgebracht wird.A preferred layer formation is seen in the fact that a single layer made of Al 99.5; AlMg3; AlMg5; Cu 99; Cu 99.5; Ni / Al, Ni / Ti or a mixture of Al 2 O 3 and TiO 2 is applied.

Alternativ kann vorgesehen sein, daß als Deckschicht eine Mehrfachschicht aufgebracht wird, die als Haftgrundschicht aus NiAl und als Funktions-(Schutz)-Schicht aus einer Mischung von Al2O3 und TiO2, insbesondere 60/40 bzw. 97/03 besteht.Alternatively, it can be provided that a multilayer is applied as the cover layer, which consists of NiAl as the adhesive base layer and as a functional (protective) layer of a mixture of Al 2 O 3 and TiO 2 , in particular 60/40 or 97/03.

Der Mehrfachschichtaufbau ist bevorzugt.The multi-layer structure is preferred.

Claims (6)

1. Verfahren zur Regeneration von Schadstellen der Emaille- Schicht in emaillierten Tanks aus Stahl, für welche die Bestimmungen der Lebensmittelindustrie gelten, dadurch gekennzeichnet, daß die Schadstelle mit Strahl­ mittel, insbesondere Korund, gestrahlt und aufgerauht wird, daß die so behandelte Schadstelle mit einer metallischen Deckschicht mittels thermischer Spritzver­ fahren beschichtet wird und daß die Poren der so erzeug­ ten mikroprösen Deckschicht nachfolgend geschlossen werden.1. A process for the regeneration of damaged areas of the enamel layer in enameled steel tanks, to which the provisions of the food industry apply, characterized in that the damaged area is blasted with medium, in particular corundum, and roughened so that the damaged area thus treated is treated with a metallic top layer is coated by means of thermal spraying and that the pores of the micro-porous top layer thus produced are subsequently closed. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die örtlich neben der Schadstelle befindlichen Bereiche ebenfalls mit scharfkantigem Strahlmittel gestrahlt werden, und zwar insbesondere die Randfläche der noch an der Tankwandung haftenden Emaille-Schicht in einer Entfernung von 2 bis 30 mm vom Schadstellenrand aufge­ rauht wird. 2. The method according to claim 1, characterized in that the areas located next to the damaged area also blasted with sharp-edged abrasive be, in particular the edge of the still Enamel layer adhering to the tank wall in one Distance from 2 to 30 mm from the edge of the damaged area is roughed.   3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Poren der mikroporösen Deckschicht durch mecha­ nische Bearbeitung, insbesondere Bürsten, vornehmlich mit metallischen und/oder nichtmetallischen Arbeits­ mitteln, geschlossen werden.3. The method according to claim 1 or 2, characterized in that the pores of the microporous cover layer by mecha African processing, especially brushing, mainly with metallic and / or non-metallic work average, be closed. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Poren der Deckschicht mit Poren­ versiegler, insbesondere auf Basis von Polymethacrylat oder Expoxidharz, versiegelt werden.4. The method according to any one of claims 1 to 3, characterized characterized in that the pores of the top layer with pores sealer, in particular based on polymethacrylate or epoxy resin. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als thermische Deckschicht eine Einfachschicht aus Al 99,5; AlMg3; AlMg5; Cu 99; Cu 99,5; Ni/Al, Ni/Ti bzw. einer Mischung aus Al2O3 und TiO2 aufgebracht wird.5. The method according to any one of claims 1 to 4, characterized in that a single layer of Al 99.5; AlMg3; AlMg5; Cu 99; Cu 99.5; Ni / Al, Ni / Ti or a mixture of Al 2 O 3 and TiO 2 is applied. 6. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Deckschicht eine Mehrfachschicht aufgebracht wird, die als Haftgrundschicht aus NiAl und als Funktions-(Schutz)-Schicht aus einer Mischung von Al2O3 und TiO2, insbesondere 60/40 bzw. 97/03 besteht.6. The method according to any one of claims 1 to 4, characterized in that a multilayer is applied as the top layer, which is used as an adhesive base layer of NiAl and as a functional (protective) layer of a mixture of Al 2 O 3 and TiO 2 , in particular 60th / 40 or 97/03.
DE4021466A 1990-07-05 1990-07-05 Restoring damaged areas of enamel layer in steel tanks - by spraying abrasive agent, esp. corundum, applying protection layer by plasma or detonation spraying etc. Withdrawn DE4021466A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4021466A DE4021466A1 (en) 1990-07-05 1990-07-05 Restoring damaged areas of enamel layer in steel tanks - by spraying abrasive agent, esp. corundum, applying protection layer by plasma or detonation spraying etc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4021466A DE4021466A1 (en) 1990-07-05 1990-07-05 Restoring damaged areas of enamel layer in steel tanks - by spraying abrasive agent, esp. corundum, applying protection layer by plasma or detonation spraying etc.

Publications (1)

Publication Number Publication Date
DE4021466A1 true DE4021466A1 (en) 1992-01-09

Family

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DE4021466A Withdrawn DE4021466A1 (en) 1990-07-05 1990-07-05 Restoring damaged areas of enamel layer in steel tanks - by spraying abrasive agent, esp. corundum, applying protection layer by plasma or detonation spraying etc.

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Country Link
DE (1) DE4021466A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503999A1 (en) * 1995-02-08 1996-08-14 Thale Eisen Huettenwerk Producing enamelled iron workpieces in endless format or with large surface areas
US5624717A (en) * 1992-11-27 1997-04-29 Snmi-Societe Nouvelle De Metallisation Industrie Process for coating or hardfacing a part by means of a plasma transferred arc
DE19809982A1 (en) * 1998-03-09 1999-09-16 Volkswagen Ag Paint fault repair process for vehicle bodywork
EP1354978A1 (en) * 2000-11-27 2003-10-22 Ikebukuro Horo Kogyo Co. Ltd. Glass lining application method
DE102004007361B4 (en) * 2003-02-24 2005-10-06 Innovent E.V. Method for modifying galvanized steel surfaces and black steel surfaces
RU2587678C1 (en) * 2014-12-18 2016-06-20 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" Acid-proof composition for repair of enamel coating
EP3763686A1 (en) 2019-07-08 2021-01-13 OMERAS GmbH Oberflächenveredelung und Metallverarbeitung Repair of defects in a glass or glass-ceramic coating on a metallic or ceramic substrate including substrate surface

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5624717A (en) * 1992-11-27 1997-04-29 Snmi-Societe Nouvelle De Metallisation Industrie Process for coating or hardfacing a part by means of a plasma transferred arc
DE19503999A1 (en) * 1995-02-08 1996-08-14 Thale Eisen Huettenwerk Producing enamelled iron workpieces in endless format or with large surface areas
DE19503999C2 (en) * 1995-02-08 1998-08-20 Thale Eisen Huettenwerk Process for the production of enamelled components in endless lengths or large areas as well as partial element and use of a partial element
DE19809982A1 (en) * 1998-03-09 1999-09-16 Volkswagen Ag Paint fault repair process for vehicle bodywork
DE19809982B4 (en) * 1998-03-09 2007-09-27 Volkswagen Ag Method for small-area repair of paint defects of a paint coating
EP1354978A1 (en) * 2000-11-27 2003-10-22 Ikebukuro Horo Kogyo Co. Ltd. Glass lining application method
US6815013B2 (en) 2000-11-27 2004-11-09 Ikebukuro Horo Kogyo Co., Ltd. Glass lining application method
DE102004007361B4 (en) * 2003-02-24 2005-10-06 Innovent E.V. Method for modifying galvanized steel surfaces and black steel surfaces
RU2587678C1 (en) * 2014-12-18 2016-06-20 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" Acid-proof composition for repair of enamel coating
EP3763686A1 (en) 2019-07-08 2021-01-13 OMERAS GmbH Oberflächenveredelung und Metallverarbeitung Repair of defects in a glass or glass-ceramic coating on a metallic or ceramic substrate including substrate surface
WO2021004823A1 (en) 2019-07-08 2021-01-14 Omeras Gmbh Oberflächenveredelung Und Metallverarbeitung Repairing defects in a glass or glass ceramic covering on a metal or ceramic substrate including the substrate surface

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