SE526172C2 - Method of treating a surface - Google Patents

Method of treating a surface

Info

Publication number
SE526172C2
SE526172C2 SE0301362A SE0301362A SE526172C2 SE 526172 C2 SE526172 C2 SE 526172C2 SE 0301362 A SE0301362 A SE 0301362A SE 0301362 A SE0301362 A SE 0301362A SE 526172 C2 SE526172 C2 SE 526172C2
Authority
SE
Sweden
Prior art keywords
primer
epoxy material
powder
thickness
layer
Prior art date
Application number
SE0301362A
Other languages
Swedish (sv)
Other versions
SE0301362L (en
SE0301362D0 (en
Inventor
Peter Norman
Goeran Fahlstroem
Goeran Svensson
Original Assignee
Saab Ab
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 Saab Ab filed Critical Saab Ab
Priority to SE0301362A priority Critical patent/SE526172C2/en
Publication of SE0301362D0 publication Critical patent/SE0301362D0/en
Priority to EP04010656A priority patent/EP1475452A3/en
Publication of SE0301362L publication Critical patent/SE0301362L/en
Publication of SE526172C2 publication Critical patent/SE526172C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment
    • C25D11/246—Chemical after-treatment for sealing layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention concerns a method for treating a surface of aluminum or aluminum alloy. The method is characterized by a new combination of pretreatment and surface coating. The surface (1) intended for treatment is pretreated by means of anodization and coated with epoxy phenol adhesive primer. The pretreated surface is then sprayed with epoxy material in powder form with particle size in the 15 - 25 mu m range. The powder-coated surface is heated to the curing temperature of the epoxy material, 115 - 130 DEG C, whereupon the epoxy material is caused to cure.

Description

25 30 rf Ä /' r7 o 0 con 0 0 sk.) 1/2 °=§_="= 0 nano. 25 30 rf Ä / 'r7 o 0 con 0 0 sk.) 1/2 ° = § _ = "= 0 nano.

O 0 0 0 0 uno 09000 2 kromater att jämföra med den andel på 20 % som ingår i den konventionella primem. Den totala beläggningstjoclcleken kan vidare reduceras med ungefär en tredjedel i förhållande till vid användning av konventionellt lacksystem, vilket ger en viktsbesparing som är värdefull inom flygplansindustrín.O 0 0 0 0 uno 09000 2 chromates to compare with the 20% share included in the conventional primer. Furthermore, the total coating thickness can be reduced by about one third compared to when using a conventional paint system, which provides a weight saving that is valuable in the floor plan industry.

Den föreslagna metoden för ytbeläggning är även bättre med avseende på motståndskraft mot kemiska reaktioner, stötar och vidhäfinirigsegenskaper i förhållande till den konventionella metoden. Därigenom kan en väsentlig förlängning av driftstiden förväntas.The proposed method of coating is also better in terms of resistance to chemical reactions, shocks and adhesion properties compared to the conventional method. As a result, a significant extension of the operating time can be expected.

Genomförda test har visat att genomloppstiden vid tillverlmingen minskas med åtminstone 50% i jämförelse med vad som är fallet vid den konventionella metoden.Tests carried out have shown that the throughput time during manufacture is reduced by at least 50% compared to what is the case with the conventional method.

KORT FIGURBESKRIVNING Figur 1 visar konventionell ytbeläggning enligt teknikens ståndpunkt Figur 2 visar ytbeläggning medelst den uppfinningsenliga kombinationen av primerbehandling och pulverapplicering.BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows conventional surface coating according to the prior art Figure 2 shows surface coating by means of the inventive combination of primer treatment and powder application.

BESKRIVNING Av FÖREDRAGEN UTFÖRINGSFORM I figur l visas en aluminiumyta 1 med en ytbeläggning enligt konventionell teknik.DESCRIPTION OF THE PREFERRED EMBODIMENT Figure 1 shows an aluminum surface 1 with a surface coating according to conventional technology.

Aluminiumytan är i ett första skikt 2 kromsyraanodiserad med en skikttjocklek i storleksordningen 2-5 pm. Ett primerskikt 3 har vid konventionell teknik för ytbehandling en tjocklek i storleksordningen 15-25 pm. Den slutliga ytbeläggningen görs i två till fyra steg med ett resulterande skikt 4 i storleksordningen 40-60um. Ett problem vid konventionell teknik är att man vid denna teknik tvingas utnyttja en stor mängd miljöfarliga lösningsmedel. Skikten 2-4 måste även göras relativt tjocka, vilka leder till en oönskat hög vikt i flygplanssammanhang.The aluminum surface is in a first layer 2 chromic acid anodized with a layer thickness in the order of 2-5 μm. In the case of conventional surface treatment techniques, a primer layer 3 has a thickness of the order of 15-25 μm. The final coating is done in two to four steps with a resulting layer 4 in the order of 40-60 μm. A problem with conventional technology is that this technology is forced to use a large amount of environmentally hazardous solvents. Layers 2-4 must also be made relatively thick, which leads to an undesirably high weight in the eye plane context.

I figur 2 visas en yta belagd i enlighet med den nya metoden för ytbeläggning. En aluminiumyta 1 har anodiserats med en fosforsyra och försetts med en beläggning 6 av primer med en tjocklek 5 - 10 um. Tekniken för denna förbehandling är en väl känd process som idag utnyttjas vid ytbehandling före metallimning och sprutrnålning.Figure 2 shows a surface coated in accordance with the new method of surface coating. An aluminum surface 1 has been anodized with a phosphoric acid and provided with a coating 6 of primer with a thickness of 5 - 10 μm. The technique for this pre-treatment is a well-known process that is currently used in surface treatment before metal gluing and spray needling.

Före beläggning av primer och beläggning av epoximaterial i pulverform måste de för beläggningen avsedda artiklarna anodoxideras. Detta görs företrädesvis i en process med 10 15 20 25 30 b) fosforsyraanodiseríng. Dimensionen hos tilledare och antal kontaktpunkter anpassas till material och artikel. De olika artiklarna monteras på hållare så att behandlingsbad och sköljvatten kommer i kontakt med alla ytor. Artiklama anodiseras i 100-120 g/l fosforsyra vid en temperatur av 22-28°C och vid en spänning 15 i lV. Spänningen hålls konstant under en bestämd tidsperiod, vilken kan vara i storleksordningen 20 - 25 minuter.Before coating the primer and coating the epoxy material in powder form, the articles intended for the coating must be anodized. This is preferably done in a process of b) phosphoric acid anodizing. The dimension of the conductor and the number of contact points are adapted to the material and article. The various articles are mounted on holders so that the treatment bath and rinsing water come into contact with all surfaces. The articles are anodized in 100-120 g / l phosphoric acid at a temperature of 22-28 ° C and at a voltage of 15 IV. The voltage is kept constant for a certain period of time, which can be in the order of 20-25 minutes.

Artiklarna avlägsnas därefter ur anodiseringsbadet och sköljs. Artikeln torkas därefter grundligt, varefter kontroll utförs av det bildade anodiseringsskiktet 5.The articles are then removed from the anodizing bath and rinsed. The article is then thoroughly dried, after which inspection is performed of the formed anodizing layer 5.

Inom cirka tre dygn efter avslutad anodoxidering och efterföljande torkning ska limprimem appliceras. Limprimem används som vidhäftningsförbättrare och korrosionsskydd. Föredragen primer består huvudsakligen av epoxi och fenol, eventuellt med tillsats av strontiumkromat som korrosionshämmare. Primerbehandlingen utförs företrädesvis omedelbart efter ytbehandling eller altemativt senast inom två timmar - vid förvaring i rent rum inom 72 timmar. Applicering av primem sker via sprutning. Om resulterande primerskikt 6 efter sprutning är tunnare än önskat kan ett andra skikt appliceras före härdning för att öka tjockleken.Within about three days after completion of anode oxidation and subsequent drying, the adhesive primer should be applied. The adhesive primer is used as an adhesion promoter and corrosion protection. Preferred primers consist mainly of epoxy and phenol, possibly with the addition of strontium chromate as corrosion inhibitor. The primer treatment is preferably carried out immediately after surface treatment or alternatively no later than within two hours - when stored in a clean room within 72 hours. Application of primer is via spraying. If the resulting primer layer 6 after spraying is thinner than desired, a second layer can be applied before curing to increase the thickness.

Efter applicering ska primem torka vid rumstemperatur. Därefter härdas primerskiktet vid temperaturer i intervallet 110 - 135°C under 60-120 minuter, alternativt 80-90° under 24 h.After application, the primer should dry at room temperature. Thereafter, the primer layer is cured at temperatures in the range of 110 - 135 ° C for 60-120 minutes, alternatively 80-90 ° for 24 hours.

Tiden mellan prímerappliceríng och härdning bör inte överstiga 120 timmar.The time between primer application and curing should not exceed 120 hours.

Tjockleken på primerskiktet 6 ska företrädesvis vara i storleksordningen 5 - 10 um.The thickness of the primer layer 6 should preferably be in the order of 5 - 10 μm.

Tjockare primerskikt är naturligtvis även möjliga; användningen av tjockare skikt minskar dock en av de stora fördelarna med uppfinningen där den nya ytbehandlingsmetoden gör det möjligt att minska utsläppen av lösningsmedel genom att reducera tj ockleken hos primerskiktet.Thicker primer layers are of course also possible; however, the use of thicker layers reduces one of the great advantages of the invention where the new surface treatment method makes it possible to reduce solvent emissions by reducing the thickness of the primer layer.

Täcklackering av de forsforsyraanodiserade och limprimerbehandlade artiklama görs medelst en enkomponent epoxípulvertäcklack. Denna pulverlack ska inte användas på artiklar som utsätts för direkt solljus utan är främst avsedd för användning invändigt i flygplanet. Vid en föredragen utföringsforrn av uppfinningen används en pulverlack där pulvret utgörs av epoxipartiklar med mycket låg partikelstorlek, 15 - 25 ttm. Pulvret 10 “l » J k/\ -Q en ro 4 används såsom det levereras och genomgår inte någon ytterligare bearbetning innan pulverappliceringen på aktuell artikel.Coating of the phosphoric acid anodized and adhesive primer treated articles is done by means of a one-component epoxy powder coating. This powder coating should not be used on articles exposed to direct sunlight but is primarily intended for use inside the eye plane. In a preferred embodiment of the invention, a powder coating is used where the powder consists of epoxy particles with a very low particle size, 15 - 25 tm. The powder 10 “l» J k / \ -Q en ro 4 is used as it is delivered and does not undergo any further processing before the powder application on the current article.

Appliceringen sker genom elektrostatisk applicering av pulvret. Artikeln jordas och partiklarna i pulvret uppladdas varefter pulvret sprutas mot artikeln. Efler appliceringen tillåts den lackerade ytan att hårda cirka 30 minuter vid temperaturer i intervallet 115 - l35°C. Pulverbeläggningen görs i ett skikt 7 med tjockleken 40 - 50 pm. Skiktets 7 tjocklek kan naturligtvis varieras inom ramen för uppfinningstaiiken; eftersom viktaspekten är viktig inom flygplansindustrin bör dock skíktet 7 hållas så tunt som bedöms vara möjligt.The application takes place by electrostatic application of the powder. The article is grounded and the particles in the powder are charged, after which the powder is sprayed against the article. After application, the lacquered surface is allowed to harden for about 30 minutes at temperatures in the range 115 - l35 ° C. The powder coating is made in a layer 7 with a thickness of 40 - 50 μm. The thickness of the layer 7 can of course be varied within the scope of the invention; since the weight aspect is important in the pl planing industry, however, layer 7 should be kept as thin as is deemed possible.

Claims (1)

10 15 'Éï f» 17 2 šïïi jQ-:Iäíš 5 PATENTKRAV10 15 'Éï f »17 2 šïïi jQ-: Iäíš 5 PATENTKRAV 1. Metod för behandling av en yta (l) av aluminium eller alinniniumlegering kännetecknad av följande steg i kombination: ytan törbehandlas medelst anodoxidering och beläggs med en primer av epoxifenol, den förbehandlade ytan besprutas med epoximaterial i pulverform med partikelstorlek i ett intervall 15 - 25 pm, ytan uppvärms till epoximaterialets härdningstemperatur 115 - 130°C , varigenom epoximaterialet smälter och bringas att härda. Metod enligt patentkrav 1, varvid pulverbeläggningen görs i ett skikt (7) med tjockleken 30 - 50 um. Metod enligt något av föregående patentkrav, varvid prímerskiktet (6) ges en tjocklek inom intervallet 5 - 10 um. Metod enligt patentkrav 3, varvid anodiseringen görs med fosforsyra. Metod enligt något av föregående patentkrav, varvid ytbehandlingen utförs på formade och bearbetade plåtartiklar såsom spant och spryglar. Metod enligt något av patentkrav 1-4, varvid ytbehandlingen utförs vid maskinbearbetade artiklar såsom srniden och gjutgods. 0 00000:Method for treating a surface (1) of aluminum or aluminum alloy characterized by the following steps in combination: the surface is dry-treated by anode oxidation and coated with a primer of epoxyphenol, the pretreated surface is sprayed with epoxy material in powder form with a particle size in a range 15 - 25 pm, the surface is heated to the curing temperature of the epoxy material 115 - 130 ° C, whereby the epoxy material melts and is caused to cure. Method according to claim 1, wherein the powder coating is made in a layer (7) with a thickness of 30-50 μm. A method according to any one of the preceding claims, wherein the primer layer (6) is given a thickness in the range 5 - 10 μm. A method according to claim 3, wherein the anodizing is done with phosphoric acid. Method according to one of the preceding claims, wherein the surface treatment is carried out on shaped and machined sheet metal articles such as frames and spools. Method according to one of Claims 1 to 4, in which the surface treatment is carried out on machined articles such as molds and castings. 0 00000:
SE0301362A 2003-05-08 2003-05-08 Method of treating a surface SE526172C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0301362A SE526172C2 (en) 2003-05-08 2003-05-08 Method of treating a surface
EP04010656A EP1475452A3 (en) 2003-05-08 2004-05-05 Method for treating an aluminium or aluminium alloy surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0301362A SE526172C2 (en) 2003-05-08 2003-05-08 Method of treating a surface

Publications (3)

Publication Number Publication Date
SE0301362D0 SE0301362D0 (en) 2003-05-08
SE0301362L SE0301362L (en) 2004-11-09
SE526172C2 true SE526172C2 (en) 2005-07-19

Family

ID=20291260

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0301362A SE526172C2 (en) 2003-05-08 2003-05-08 Method of treating a surface

Country Status (2)

Country Link
EP (1) EP1475452A3 (en)
SE (1) SE526172C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2716144A1 (en) 2009-10-02 2011-04-02 University Of Windsor Method of surface treatment of aluminum foil and its alloy and method of producing immobilized nanocatalyst of transition metal oxides and their alloys
JP5890643B2 (en) * 2011-09-29 2016-03-22 株式会社東芝 Casting product for electrical insulation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127451A (en) * 1976-02-26 1978-11-28 The Boeing Company Method for providing environmentally stable aluminum surfaces for adhesive bonding and product produced
FR2638466B1 (en) * 1988-11-03 1993-05-07 Atochem PROCESS FOR COATING METAL SUBSTRATES USING A POWDER PRIMER AND A DIP APPLIED COATING, POWDER PRIMER COMPOSITIONS USED AND COMPOSITE MATERIALS OBTAINED
US5116672A (en) * 1990-02-05 1992-05-26 Sermatech International, Inc. Organic coatings with ion reactive pigments especially for active metals
US5252399A (en) * 1991-12-20 1993-10-12 Hitachi Metal Ltd. Aluminum member provided with weather-resistant coat
JP2001073168A (en) * 1999-09-03 2001-03-21 Honda Motor Co Ltd Coating structure having corrosion resistance
DE10115747A1 (en) * 2001-03-27 2002-11-28 Innovent Ev Technologieentwicklung Aqueous primer for aluminum metal and alloy surfaces for powder coating, comprises blocked or capped isocyanate groups, optionally in combination with H-acidic compounds, epoxides and/or silanes.

Also Published As

Publication number Publication date
EP1475452A3 (en) 2005-01-26
EP1475452A2 (en) 2004-11-10
SE0301362L (en) 2004-11-09
SE0301362D0 (en) 2003-05-08

Similar Documents

Publication Publication Date Title
EP0976795B1 (en) Antifriction coating for metals and process for its manufacture
US4274887A (en) Lacquer coated metal surface
RU2657500C2 (en) Joining thermoplastic material and metal
CA2733084C (en) Co-cure process for autodeposition coating
US6875471B2 (en) Metallization of polymer parts for painting
SE526172C2 (en) Method of treating a surface
EP1629139B1 (en) Process for painting metal parts
JPH10296171A (en) Method for coating plastic base material
CN116265130A (en) Corrosion resistant material and method of application
JP2599467B2 (en) Surface treatment method and surface treatment composition for galvanized steel
JP2004322029A (en) Painting method
JP2004189907A (en) Powder coating material composition, method for coating rust preventive film, and automotive steel material
KR102063914B1 (en) Coating systems
KR101830580B1 (en) Method for electrodeposition coating for preventing pinholes and wrinkles
Gadow et al. Coating system for magnesium diecastings in class A surface quality
US20030132116A1 (en) Process for coating workpieces, in particular vehicle bodies
JP4063132B2 (en) Painting method
EP4187000A1 (en) Component processing
CN107899925A (en) The coating process of arrangements for automotive doors
CZ294230B6 (en) Method of applying paint layers to surface of plastic parts
CN116855146A (en) Strippable coating with strong room temperature oxidant resistance, manufacturing method and coating structure
JP4235761B2 (en) High corrosion resistance powder coating method
GB2613173A (en) Component processing
JPH09241891A (en) Coating method
JPS61133276A (en) Coating composition for substrate