EP1630251B1 - Procédé de revêtement des appareils ou des parties d'appareils utilisés pour la construction d'installations chimiques - Google Patents

Procédé de revêtement des appareils ou des parties d'appareils utilisés pour la construction d'installations chimiques Download PDF

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Publication number
EP1630251B1
EP1630251B1 EP04022161A EP04022161A EP1630251B1 EP 1630251 B1 EP1630251 B1 EP 1630251B1 EP 04022161 A EP04022161 A EP 04022161A EP 04022161 A EP04022161 A EP 04022161A EP 1630251 B1 EP1630251 B1 EP 1630251B1
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EP
European Patent Office
Prior art keywords
coated
coating
activator
layer
parts
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EP04022161A
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German (de)
English (en)
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EP1630251A2 (fr
EP1630251A3 (fr
Inventor
Bernd Terstegen
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Individual
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Priority to DE502004004444T priority Critical patent/DE502004004444D1/de
Priority to EP04022161A priority patent/EP1630251B1/fr
Priority to AT04022161T priority patent/ATE368137T1/de
Priority to ES04022161T priority patent/ES2291792T3/es
Publication of EP1630251A2 publication Critical patent/EP1630251A2/fr
Publication of EP1630251A3 publication Critical patent/EP1630251A3/fr
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    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/088—Iron or steel solutions containing organic acids

Definitions

  • the invention relates to a method for coating of apparatuses and apparatus parts for chemical plant construction consisting of metals, in particular stainless steels, in which the surfaces to be coated are pretreated and subsequently coated with at least one layer of a Ni-P alloy by electroless plating with the aid of a plating bath become.
  • Such a procedure is over DE-A 100 16 215 known.
  • On the surfaces to be protected first elevations are formed. This is done by adding inorganic particles of oxides, silicates, carbonates, carbides or nitrides to the plating bath or by structuring the surfaces by etching, embossing or blasting.
  • the coating is applied by chemical or autocatalytic deposition by filling the apparatus with metal electrolyte solution or by immersing pieces of equipment in dip baths containing the metal electrolyte solution.
  • a nickel-phosphorus alloy is preferably used. This may contain a halogenated polymer, especially for a coating consisting of two layers.
  • a metal layer is first deposited on the surfaces and then applied to this a metal-polymer dispersion layer.
  • the invention is based on a method for electroless chemical deposition of metal-polymer dispersion layers, which is known per se (US Pat. W. Riedel: Functional Vemickelung, Verlag Eugen Leize, Saulgau, 1989, pp. 231-236, ISBN 3-750480-044-x ).
  • the deposition of the metal layer or the metal-polymer dispersion phases serves to coat the apparatuses and apparatus parts of chemical plant construction known per se. Since the layers adhere well only on a clean surface, all materials must be subjected to a pre-treatment before electroplating.
  • chemical nickel systems which are phosphorus-containing nickel alloys having a phosphorus content of about 0.5 to about 15 wt .-%.
  • the layers are applied by chemical or autocatalytic deposition on the surfaces to be protected, the necessary electrons are not provided by an external power source, but are generated by chemical reaction in the electrolyte itself.
  • Such solutions are marketed, for example, by Riedel, Galvan- und Filtertechnik GmbH, Halle, Westphalia and Atotech GmbH, Berlin.
  • a layer of a Nl-P alloy containing particles of a halogenated polymer is applied to the pretreated surfaces of the apparatus or apparatus parts.
  • the optional polymer to be used is preferably fluorinated.
  • suitable fluorinated polymers are polytetrafluoroethylene, perfluoroalkoxy polymers (PFA, for example with C 1 -C 8 -alkoxy units), copolymers of tetrafluoroethylene and perfluoroalkylvinylether, for example perfluorovinylpryl ether.
  • Particularly preferred are polytetrafluoroethylene (PTFE) and perfluoroalkoxy polymers (PFA, according to DIN 7728, Part 1, Jan. 1988).
  • the polymer content of the coating is mainly influenced by the amount of polymer dispersion added and the choice of detergents.
  • the concentration of the polymer plays the major role here; high polymer concentrations of the immersion baths lead to a disproportionately high polymer content in the nickel-phosphorus-polymer dispersion layer.
  • the parts to be coated are immersed in immersion baths containing the nickel electrolyte solution.
  • Another embodiment of the method according to the invention consists in that the containers to be coated are filled with nickel electrolyte solution.
  • Another suitable method is to pump the electrolyte solution through the part to be coated. This variant is shown schematically in FIG. 1, which shows the coating of a heat exchanger.
  • the heat exchanger is designated by (1). It has connections (2) and (3) for the inlet and outlet of a heating medium.
  • the means necessary for the pretreatment and coating of the surfaces of the heat exchanger are contained in the reservoirs (4), (5), (6) and (7), wherein, for example, in (4) a mordant, in (5) a surfactant cleaner, in (6) the activator according to the invention and in (7) the nickel electrolyte solution can be stored.
  • These agents are successively conveyed by means of a pump (8) through the heat exchanger and returned via the return (9) back into the reservoir.
  • the activator is removed from the heat exchanger by means of nitrogen.
  • a connection (10) is provided for this purpose.
  • the annealing time is generally 5 minutes to 3 hours, preferably 35 to 60 minutes.
  • the treated surfaces of the invention allow good heat transfer, although the coatings have a significant thickness of 1 to 100 microns.
  • the polymer content of the dispersion coating is 5 to 30% by volume.
  • the surfaces also have excellent durability.
  • the nickel-polymer dispersion layer contains an additional polymer to further enhance the non-stick properties of the coating.
  • This polymer may be halogenated or non-halogenated. Particularly preferred is the use of polytetrafluoroethylene or ethylene polymers and ethylene copolymers.
  • This optionally used polymer is also added as a dispersion or slurry in an aqueous surfactant solution, the order of addition of the dispersions being not critical. It is important that the particles of the further, halogenated or non-halogenated polymer are coarser than those of the halogenated polymer. Thus, mean particle diameters of 5 to 50 microns have been found to be advantageous.
  • a further cover layer of a perfluoroalkoxy polymer (PFA) can be applied to this layer structure by dipping, spraying or electrostatic powder coating. Such a coating is shown in FIG. 2.
  • the method according to the invention can be applied to all surfaces of apparatuses and apparatus parts which are threatened by deposits for chemical plant construction, in particular apparatuses and apparatus parts made of metals, particularly preferably of stainless steels.

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  • 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)
  • Chemical Treatment Of Metals (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Chemically Coating (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Fertilizers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electroplating Methods And Accessories (AREA)

Claims (5)

  1. Procédé pour appliquer un revêtement sur des appareils et des parties d'appareils utilisés pour la construction d'installations chimiques en matière métallique et notamment en inox, avec pré traitement des surfaces destinés à être revêtus et revêtement avec au moins une couche d'alliage en Ni-P de façon autocatalytique a l'aide d'un bain de galvanisation. Ce procédé est caractérisé en ce que les surfaces sont décapées par un activateur chauffé à 40°C à 85°C, consistant d'un mélange (relatif à 1 I d'activateur) de
    10 à 300 ml d'acide chlorhydrique ou d'acide fluorhydrique ,
    1 à 5 ml d'acide sulfurique ,
    1 à 2 g de chlorure de fer-III (sublimé),
    6 à 12 g de chlorure de nickel ,
    10 à 20 g d'acide citrique et de l'eau,
    en ce que l'activateur est enlevé par un produit chimique inerte et que les surfaces sont revêtues directement.
  2. Procédé selon la revendication 1, caractérisé en ce que l'activateur est enlevé par de l'azote ou par une solution électrolytique métallique.
  3. Procédé selon la revendication 1, caractérisé en ce qu'un dépôt en alliage Ni-P comprenant des particules d'un polymère halogénés est appliqué aux surfaces prétraitées.
  4. Procédé selon la revendication 1, caractérisé en ce qu'une couche supplémentaire en polymères perfluoro-alkoxy (PFA)
  5. Procédé selon la revendication 1, caractérisé en ce qu'un dépôt est appliqué par immersion, jet ou pulvérisation électrostatique.
EP04022161A 2004-09-17 2004-09-17 Procédé de revêtement des appareils ou des parties d'appareils utilisés pour la construction d'installations chimiques Active EP1630251B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502004004444T DE502004004444D1 (de) 2004-09-17 2004-09-17 Verfahren zur Beschichtung von Apparaten und Apparateteilen für den chemischen Anlagenbau
EP04022161A EP1630251B1 (fr) 2004-09-17 2004-09-17 Procédé de revêtement des appareils ou des parties d'appareils utilisés pour la construction d'installations chimiques
AT04022161T ATE368137T1 (de) 2004-09-17 2004-09-17 Verfahren zur beschichtung von apparaten und apparateteilen für den chemischen anlagenbau
ES04022161T ES2291792T3 (es) 2004-09-17 2004-09-17 Procedimiento para el recubrimiento de aparatos y piezas de aparatos para la construccion de plantas quimicas.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04022161A EP1630251B1 (fr) 2004-09-17 2004-09-17 Procédé de revêtement des appareils ou des parties d'appareils utilisés pour la construction d'installations chimiques

Publications (3)

Publication Number Publication Date
EP1630251A2 EP1630251A2 (fr) 2006-03-01
EP1630251A3 EP1630251A3 (fr) 2006-03-08
EP1630251B1 true EP1630251B1 (fr) 2007-07-25

Family

ID=35721017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04022161A Active EP1630251B1 (fr) 2004-09-17 2004-09-17 Procédé de revêtement des appareils ou des parties d'appareils utilisés pour la construction d'installations chimiques

Country Status (4)

Country Link
EP (1) EP1630251B1 (fr)
AT (1) ATE368137T1 (fr)
DE (1) DE502004004444D1 (fr)
ES (1) ES2291792T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014272A1 (de) * 2008-03-04 2009-09-10 Deutsches Zentrum für Luft- und Raumfahrt e.V. Beschichtung für ein Wärmeübertragungselement, Wärmeübertragungselement, Wärmeübertragungsvorrichtung und Verfahren zur Herstellung einer Beschichtung
DE102008020037A1 (de) 2008-04-21 2009-10-29 Snt Schauenburg Nanotec Gmbh Verfahren zum Beschichten von Bauteilen und Apparaten

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102234810A (zh) * 2010-04-20 2011-11-09 深圳富泰宏精密工业有限公司 不锈钢蚀刻后的清洗剂及其使用方法
DE102014108588B3 (de) * 2014-06-18 2015-09-03 CSB Chemische Spezialbeschichtungen GmbH Beizlösung und Verfahren zum Beizen von Metallen
DE202014102805U1 (de) 2014-06-18 2014-07-17 CSB Chemische Spezialbeschichtungen GmbH Beizlösung zum Beizen von Metallen
DE102014113543A1 (de) * 2014-09-19 2016-03-24 Endress + Hauser Gmbh + Co. Kg Medienbeständige Multilagenbeschichtung für ein Messgerät der Prozesstechnik

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029158A (en) * 1960-12-06 1962-04-10 Gen Am Transport Processes of chemical nickel plating of amphoteric and like materials
JPS61246373A (ja) * 1985-04-23 1986-11-01 Yamato Denki Kogyo Kk 快削鋼の無電解メツキ前処理剤および前処理方法
DE19860526A1 (de) * 1998-12-30 2000-07-06 Basf Ag Wärmeüberträger mit verringerter Neigung, Ablagerungen zu bilden und Verfahren zu deren Herstellung
DE10016215A1 (de) * 2000-03-31 2001-10-04 Basf Ag Verfahren zur Beschichtung von Apparaten und Apparateteilen für den chemischen Anlagenbau

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014272A1 (de) * 2008-03-04 2009-09-10 Deutsches Zentrum für Luft- und Raumfahrt e.V. Beschichtung für ein Wärmeübertragungselement, Wärmeübertragungselement, Wärmeübertragungsvorrichtung und Verfahren zur Herstellung einer Beschichtung
DE102008020037A1 (de) 2008-04-21 2009-10-29 Snt Schauenburg Nanotec Gmbh Verfahren zum Beschichten von Bauteilen und Apparaten

Also Published As

Publication number Publication date
ATE368137T1 (de) 2007-08-15
ES2291792T3 (es) 2008-03-01
EP1630251A2 (fr) 2006-03-01
DE502004004444D1 (de) 2007-09-06
EP1630251A3 (fr) 2006-03-08

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