NO851339L - CORROSION PROTECTION PRIMER FOR PHOSPHATED OR CHROMATED, ELECTROLYTIC THICKLY Galvanized, formable steel sheet - Google Patents

CORROSION PROTECTION PRIMER FOR PHOSPHATED OR CHROMATED, ELECTROLYTIC THICKLY Galvanized, formable steel sheet

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Publication number
NO851339L
NO851339L NO851339A NO851339A NO851339L NO 851339 L NO851339 L NO 851339L NO 851339 A NO851339 A NO 851339A NO 851339 A NO851339 A NO 851339A NO 851339 L NO851339 L NO 851339L
Authority
NO
Norway
Prior art keywords
corrosion protection
protection primer
steel sheet
dry film
phosphated
Prior art date
Application number
NO851339A
Other languages
Norwegian (no)
Inventor
Wolfgang Lorenz
Albert Arenz
Original Assignee
Inmont Gmbh
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 Inmont Gmbh filed Critical Inmont Gmbh
Publication of NO851339L publication Critical patent/NO851339L/en

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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
    • C23C22/00Chemical 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
    • C23C22/82After-treatment
    • C23C22/83Chemical after-treatment
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • C09D5/10Anti-corrosive paints containing metal dust

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Laminated Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemical Treatment Of Metals (AREA)

Description

Denne oppfinnelse angår en glidedyktig og sveisbar korrosjonsbeskyttelses-primer for fosfatert eller kromatert, elektrolytisk tynnforsinket, formbart stålblikk. This invention relates to a sliding and weldable corrosion protection primer for phosphated or chromated, electrolytically thin galvanized, malleable sheet steel.

Sinkstøv - primersystemer for formbart, fosfatert eller kromatert stålblikk ved hvilke korrosjonsbeskyttelsen bibeholdes etter formningen av blikket (f.eks. ved sponløs formning under pressing), er kjent fra DE-PS 32 32 755. Den korrosjonsbeskyttelse som disse sinkstøv-primersystemer gir, tilfredsstiller imidlertid ikke fordringene i våre dager, da det på grunn av manglende katodisk beskyttelse relativt tid-lig opptrer rødrustdannelse ved korrosjonsforsøk. På grunn av den bedre katodiske beskyttelse ved samtidig høyere over-flatekvalitet anvendes det idag i stor utstrekning elektrolytisk forsinket blikk med et forholdsvis tykt belegg på Zinc dust - primer systems for malleable, phosphated or chromated steel sheets in which the corrosion protection is maintained after the forming of the sheet (e.g. by chipless forming during pressing), is known from DE-PS 32 32 755. The corrosion protection that these zinc dust primer systems provide satisfies however, not the requirements these days, as due to a lack of cathodic protection, red rust formation occurs relatively early during corrosion tests. Due to the better cathodic protection at the same time higher surface quality, electrolytically delayed tin with a relatively thick coating on

7,5 - 10 jum. Voksende beleggtykkelse av sinksjiktet bringer imidlertid med seg problemer med hensyn til formbarheten. Riktignok lar sådant elektrolytisk forsinket blikk seg forme, men smøremiddelbehovet er da forholdsvis stort. Til tross for disse forholdsregler vil det med tiden avlagres sink på press-verktøyet, hvorved brukslevetiden forkortes vesentlig. Dessuten er energiforbruket ved påføringen av de for korrosjonsbeskyttelsen nødvendige sinktykkelser på 7,5 - 10 /um meget høyt. Allerede av denne grunn vil anvendelse av tynnforsinket blikk med en sinksjikttykkelse på ca. 2,5 jum være ønskelig. For opp-nåelse av den for korrosjonsbeskyttelsen nødvendige sjikt-tykkelse i området 7,5 - 10 yum i et elektrolytisk forsinkingsanlegg må belegningshastigheten sammenlignet med en tynnfor-sinking nedsettes ganske meget, nemlig til ca. 36 m/min. Hvis det kunne anvendes tynnforsinket blikk med et sinkbelegg på bare 2,5 um, så ville produksjonshastigheten kunne økes til 120 m/min. 7.5 - 10 days Increasing coating thickness of the zinc layer, however, brings with it problems with regard to formability. Admittedly, such electrolytically delayed tin can be formed, but the need for lubricant is relatively large. Despite these precautions, zinc will eventually be deposited on the press tool, thereby significantly shortening its service life. Furthermore, the energy consumption when applying the zinc thicknesses of 7.5 - 10 µm required for corrosion protection is very high. Already for this reason, the use of thin galvanized tin with a zinc layer thickness of approx. 2.5 jum be desirable. In order to achieve the layer thickness required for corrosion protection in the range of 7.5 - 10 µm in an electrolytic galvanizing plant, the coating speed must be reduced quite a lot compared to a thin galvanizing, namely to approx. 36 m/min. If thin galvanized sheet metal with a zinc coating of only 2.5 µm could be used, then the production speed could be increased to 120 m/min.

Oppfinnelsen tar derfor sikte på å skaffe en korrosjonsbeskyttelses-primer som tillater anvendelse av tynnforsinket stålblikk med en sinksjikttykkelse i området 2-4 jum, hvorved denne korrosjonsbeskyttelses-primer gir det tynnforsinkete blikk i det minste like god korrosjonsbeskyttelse som en sinksjikttykkelse på 7,5 - 10 jum, hvorved denne korrosjonsbeskyttelses-primer også letter eller forbedrer formbarheten sammenlignet med et tykkforsinket blikk. The invention therefore aims to provide a corrosion protection primer which allows the use of thin galvanized sheet steel with a zinc layer thickness in the range of 2-4 µm, whereby this corrosion protection primer gives the thin galvanized sheet at least as good corrosion protection as a zinc layer thickness of 7.5 - 10 jum, whereby this corrosion protection primer also facilitates or improves formability compared to a thick tinned tin.

Oppgaven løses i henhold til oppfinnelsen ved de trekk som er angitt i den karakteriserende del av krav 1. The task is solved according to the invention by the features specified in the characterizing part of claim 1.

Overraskende bevirker korrosjonsbeskyttelses-primeren ifølge oppfinnelsen, når den påføres med tørrfilmtykkelser på minst 4 /im på et tynnforsinket stålblikk med en sinksjikttykkelse på ca. 2,5 pm, en korrosjonsbeskyttelse som er ikke bare jevnbyrdig, men bedre enn den som ytes av et tykkforsinket blikk med en sinks j ikttykkelse på 7,5 jum. Surprisingly, the corrosion protection primer according to the invention, when applied with dry film thicknesses of at least 4 µm on a thin galvanized steel sheet with a zinc layer thickness of approx. 2.5 pm, a corrosion protection that is not only equal, but better than that provided by a thick galvanized sheet with a zinc thickness of 7.5 jum.

Dessuten kan et i henhold til oppfinnelsen belagt tynnforsinket blikk lettere formes (eksempelvis ved dyptrekking) enn et tykkforsinket blikk. En forurensning av formningsverk-tøyet og en herved betinget kortere brukslevetid unngås. In addition, a thin galvanized sheet coated according to the invention can be shaped more easily (for example by deep drawing) than a thick galvanized sheet. Contamination of the forming tool and a consequent shorter service life are avoided.

Korrosjonsbeskyttelses-primeren ifølge oppfinnelsen er formbar, eksempelvis ved sponløs formning, og sveisbar, slik at det med denne belagte stålblikk i tillegg til den tilstrek-kelige katodiske korrosjonsbeskyttelse er punktsveisbart og påny kan fosfateres og belegges elektroforetisk. Korrosjonsbeskyttelses-primeren ifølge oppfinnelsen tillater de i automobilindustrien vanlige tilknyttede arbeidsoperasjoner, så The corrosion protection primer according to the invention is formable, for example by chipless forming, and weldable, so that with this coated steel sheet, in addition to the sufficient cathodic corrosion protection, it is spot weldable and can be phosphated and electrophoretically coated again. The corrosion protection primer according to the invention allows the associated work operations common in the automotive industry, so

som avfetting, fosfatering, grunning med sprøyte- eller elektrodyppegrunninger på tilfredsstillende måte. Da oppfinnelsen ikke bare muliggjør bearbeidelse av meget store flater, men også i betydelig grad øker kapasiteten av de elektrolytiske forsinkingsanlegg, utgjør den et stort fremskritt, spesielt for stål- og automobilindustrien. Oppfinnelsen er imidlertid like meget anvendbar i skipsbygnings-, stålmøbel- og i emballasje-såvel som automobilindustrien. such as degreasing, phosphating, priming with spray or electrode dip primers in a satisfactory manner. As the invention not only enables the processing of very large surfaces, but also significantly increases the capacity of the electrolytic galvanizing plants, it constitutes a major advance, especially for the steel and automobile industries. However, the invention is just as applicable in the shipbuilding, steel furniture and packaging industries as well as the automobile industry.

De produkter som anvendes som bindemiddel i korrosjonsbeskyttelses-primeren ifølge oppfinnelsen, er kjent. Det dreier seg her om mettede polyesterharpikser og/eller epoksydharpikser og deres derivater, som f.eks. forkondensater og estere. The products used as binders in the corrosion protection primer according to the invention are known. These are saturated polyester resins and/or epoxy resins and their derivatives, such as e.g. precondensates and esters.

Foruten sink, aluminium "og/eller et glidemiddel så som grafitt eller molybdensulfid kan det eventuelt medanvendes andre korrosjonsbeskyttelsespigmenter, fortrinnsvis på kromat-, fosfat- eller boratbasis, som f.eks. sinkkaliumkromat og/eller sinkfosfat. Videre kan det i preparatet av korrosjonsbeskyttelses-primeren , som anvendes i'de vanlige organiske løs-ningsmidler, medanvendes kjente additiver som skal hindre sedimentering. Det dreier seg om i og for seg kjente anti-sedimenteringsmidler, f.eks. på basis av pyrogen kiselsyre, bentonitter og hydrert Ricinusolje. In addition to zinc, aluminium, and/or a lubricant such as graphite or molybdenum sulphide, other corrosion protection pigments can optionally be used, preferably on a chromate, phosphate or borate basis, such as zinc potassium chromate and/or zinc phosphate. Furthermore, in the preparation of corrosion protection -the primer, which is used in the usual organic solvents, is also used with known additives to prevent sedimentation. These are known anti-sedimentation agents in and of themselves, for example on the basis of fumed silicic acid, bentonites and hydrated castor oil.

Mengden av glidemiddel i korrosjonsbeskyttelses-primeren ifølge oppfinnelsen er avhengig av arten av det anvendte glidemiddel og utgjør ca. 1-5% beregnet på den tørre film. For meget glidemiddel forringer vedheftningen av de etterfølgende sjikt, og for lite medfører dårligere formbarhet. The amount of lubricant in the corrosion protection primer according to the invention depends on the nature of the lubricant used and amounts to approx. 1-5% calculated on the dry film. Too much lubricant impairs the adhesion of the subsequent layers, and too little leads to poorer formability.

Tørrfilm-sjikttykkelsen bør fortrinnsvis være minstThe dry film layer thickness should preferably be at least

4 Aim. Oppad er tykkelsen begrenset av sveisbarheten; i regelen er den øvre grense 10 yum. 4 Aim. Upwards, the thickness is limited by the weldability; as a rule, the upper limit is 10 yum.

Vektangivelsene er ved den glidedyktige og elektrisk ledende korrosjonsbeskyttelses-primer angitt på basis av det etter tørkingen gjenværende faste stoff. The weight specifications for the slippery and electrically conductive corrosion protection primer are given on the basis of the solid substance remaining after drying.

Oppfinnelsen belyses nærmere ved hjelp av de følgende eksempler, hvor det anvendes elektrolytisk med 2,5 / am forsinket stålblikk, som på kjent måte ble renset, avfettet og fosfatert eller kromatert, hvoretter det ble belagt med primeren ifølge oppfinnelsen under anvendelse av sprøyte-, dyppe-, påstryknings-, oversvømnings- eller Coil-Coiting-metoden, og herdet ved objekttemperaturer på 210 - 250°C. The invention is elucidated in more detail with the help of the following examples, where it is used electrolytically with 2.5 / am delayed steel tin, which was cleaned, degreased and phosphated or chromated in a known manner, after which it was coated with the primer according to the invention using spray, the dipping, brushing, flooding or Coil-Coiting method, and cured at object temperatures of 210 - 250°C.

I eksemplene er den vektbaserte sammensetning av den løsningsmiddelholdige korrosjonsbeskyttelses-primer angitt, d.v.s. den oppløste form som er påkrevet for anvendelsen. In the examples, the weight-based composition of the solvent-based corrosion protection primer is indicated, i.e. the dissolved form required for the application.

EKSEMPEL 1EXAMPLE 1

Det anvendte forsinkete stålblikk har en tykkelse påThe delayed steel sheet used has a thickness of

0,75 mm og en bredde på 1,85 m og er på konvensjonell måte avfettet, fosfatert eller kromatert. 0.75 mm and a width of 1.85 m and is conventionally degreased, phosphated or chromated.

For den videre behandling av overflaten anvendes de nedenfor nærmere beskrevne oppløsninger. De angitte deler er overalt vektdeler. For the further treatment of the surface, the solutions described in more detail below are used. The specified parts are everywhere parts by weight.

Det ifølge eksempel 1 belagte blikk sammenlignes med et elektrolytisk tykkforsinket blikk med en sinksjikttykkelse på 7,5 - 8fim i en korrosjonstest (SS DIN 50021), hvorved korro-sjonsbelastningen etter 360 timer ble målt. The sheet metal coated according to example 1 is compared with an electrolytically thick galvanized sheet metal with a zinc layer thickness of 7.5 - 8 fim in a corrosion test (SS DIN 50021), whereby the corrosion load after 360 hours was measured.

Mengden og størrelsen av blærene ble bestemt i henhold til DIN 53209 og rustgraden Ri i henhold til DIN 53 219. The amount and size of the blisters was determined according to DIN 53209 and the rust degree Ri according to DIN 53 219.

Claims (7)

1. Glidedyktig og sveisbar korrosjonsbeskyttelses-primer for fosfatert eller kromatert elektrolytisk tynnforsinket og formbart stålblikk, karakterisert ved at korrosjonsbeskyttelses-primeren består av en blanding av a) 70 - 95 vektprosent, beregnet på den tørre film, av sink, aluminium, andre korrosjonsbeskyttelsespigmenter, grafitt og/eller molybdensulfid og b) 5-30 vektprosent, beregnet på den tørre film/ av et organisk bindemiddel samt eventuelt vanlige additiver.1. Slippery and weldable corrosion protection primer for phosphated or chromated electrolytic thin galvanized and malleable steel sheet, characterized in that the corrosion protection primer consists of a mixture of a) 70 - 95 percent by weight, calculated on the dry film, of zinc, aluminium, other corrosion protection pigments, graphite and/or molybdenum sulphide and b) 5-30 percent by weight, calculated on the dry film/ of an organic binder and possibly common additives. 2. Korrosjonsbeskyttelses-primer ifølge krav 1, karakterisert ved at blandingen består av 80 - 90 vektprosent av komponentene a) og 10 - 20 vektprosent av komponentene b) .2. Corrosion protection primer according to claim 1, characterized in that the mixture consists of 80 - 90 percent by weight of components a) and 10 - 20 percent by weight of components b). 3. Korrosjonsbeskyttelses-primer ifølge krav 1 eller 2, karakterisert ved et innhold av polyesterharpikser og/eller epoksydharpikser og deres derivater som organiske bindemidler.3. Corrosion protection primer according to claim 1 or 2, characterized by a content of polyester resins and/or epoxy resins and their derivatives as organic binders. 4. Korrosjonsbeskyttelses-primer ifølge ett eller flere av de foregående krav, karakterisert ved en tørrfilmsj ikttykkelse på 4 - 10/ um.4. Corrosion protection primer according to one or more of the preceding claims, characterized by a dry film layer thickness of 4 - 10 µm. 5. Korrosjonsbeskyttelses-primer ifølge krav 4, karakterisert ved en tørrfilmsj ikttykkelse på 5 - 9 fim.5. Corrosion protection primer according to claim 4, characterized by a dry film layer thickness of 5 - 9 fim. 6. Korrosjonsbeskyttelses-primer ifølge krav 5, karakterisert ved en tørrfilmsjikttykkelse på 6 - 8 pm.6. Corrosion protection primer according to claim 5, characterized by a dry film layer thickness of 6 - 8 pm. 7. Anvendelse av korrosjonsbeskyttelses-primeren ifølge ett eller flere av de foregående krav for elektrolytisk tynnforsinket stålblikk med en sinks j ikttykkelse på 2 - 4 p. m.7. Use of the corrosion protection primer according to one or more of the preceding claims for electrolytically thin galvanized steel sheet with a zinc thickness of 2 - 4 p.m.
NO851339A 1984-04-02 1985-04-01 CORROSION PROTECTION PRIMER FOR PHOSPHATED OR CHROMATED, ELECTROLYTIC THICKLY Galvanized, formable steel sheet NO851339L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843412234 DE3412234A1 (en) 1984-04-02 1984-04-02 SLIDABLE AND WELDABLE CORROSION PROTECTION PRIMER FOR ELECTROLYTICALLY THIN GALVANIZED, DEFORMABLE, PHOSPHATED OR CHROMATIZED STEEL SHEET

Publications (1)

Publication Number Publication Date
NO851339L true NO851339L (en) 1985-10-03

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NO851339A NO851339L (en) 1984-04-02 1985-04-01 CORROSION PROTECTION PRIMER FOR PHOSPHATED OR CHROMATED, ELECTROLYTIC THICKLY Galvanized, formable steel sheet

Country Status (6)

Country Link
EP (1) EP0157392A3 (en)
DE (1) DE3412234A1 (en)
DK (1) DK148085A (en)
FI (1) FI851320L (en)
NO (1) NO851339L (en)
PT (1) PT80206B (en)

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Also Published As

Publication number Publication date
DK148085D0 (en) 1985-04-01
EP0157392A3 (en) 1987-06-24
FI851320L (en) 1985-10-03
DE3412234C2 (en) 1988-10-20
DE3412234A1 (en) 1985-10-10
EP0157392A2 (en) 1985-10-09
PT80206B (en) 1987-02-16
PT80206A (en) 1985-05-01
DK148085A (en) 1985-10-03
FI851320A0 (en) 1985-04-02

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