CN105381942B - Nanometer and exempts from the middle mating finishing of car body method of painting water paint at pre-treatment - Google Patents

Nanometer and exempts from the middle mating finishing of car body method of painting water paint at pre-treatment Download PDF

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CN105381942B
CN105381942B CN201510708497.7A CN201510708497A CN105381942B CN 105381942 B CN105381942 B CN 105381942B CN 201510708497 A CN201510708497 A CN 201510708497A CN 105381942 B CN105381942 B CN 105381942B
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paint
washing
water
treatment
time
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CN105381942A (en
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李明桓
彭彪斌
许慎
龚天喜
吕睿
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Dongfeng Peugeot Citroen Automobile Co Ltd
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Dongfeng Peugeot Citroen Automobile Co Ltd
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    • 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
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/007—After-treatment
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/102—Pretreatment of metallic substrates
    • 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
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/586—No clear coat specified each layer being cured, at least partially, separately
    • 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
    • C23C22/05—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 using aqueous solutions
    • C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
    • 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
    • B05D2506/00—Halogenated polymers
    • B05D2506/20—Chlorinated polymers
    • B05D2506/25—PVC
    • 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
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/20—Use of solutions containing silanes

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

Abstract

The invention discloses a kind of novel nano pre-treatment and exempt from the middle mating finishing of car body method of painting water paint, steps are as follows: novel nano pre-treatment → electrophoretic painting → electrophoresis is dried → applies PVC sealant and middle painting water colour paint → water colour paint preliminary drying → lacquer varnish → finishing coat drying is exempted from stone-impact-proof paint → PVC glue preliminary drying → spraying.The present invention compared to phosphatization pre-treatment and solvent type have in paint mating traditional coating process, save plant area and production line saved, the construction period shortens, and environmentally friendly income is very big, has the discharge of significant low pollution object, energy-saving social benefit.

Description

Nanometer and exempts from the middle mating finishing of car body method of painting water paint at pre-treatment
Technical field
In coachbuilt body incrustation and protection technology field more particularly to a kind of nanometer of pre-treatment and exempting from Apply the mating finishing of car body method of water paint.
Background technique
The traditional coating process of coachbuilt body is zinc, manganese, nickel ternary phosphatization pre-treatment and has middle painting solvent type finishing coat mating Coating process, technology maturation have excellent performance, are widely used, but there are the pollutants such as spent organic solvent (VOC), waste water, waste residue rows High-volume big, the problems such as energy consumption is high, process flow is long, coating overall cost is high, the Performances of Novel Nano-Porous of Abroad in Recent Years auto vendor exploitation Rice pretreatment technology includes zirconates pre-treatment, silane pre-treatment etc., can eliminate heavy metal pollution existing for phosphatization pre-treatment, is reduced Sewage yield and energy consumption；A series of compact finishing coat technologies developed, including aqueous 3C1B, exempt from middle painting water paint technology Deng having and be greatly reduced that VOC emission, process flow is compact, energy saving, advantageously reduces the advantages such as painting cost.Performances of Novel Nano-Porous Rice pre-treatment and compact finishing coat complete sets of Techniques use, and are able to achieve the maximization of environmental protection, energy saving profit, but be based on both new skills The feature of art respectively, each coating surface quality state control of vehicle body is difficult, therefore uses novel nano pre-treatment and compact face It paints mating application techniques and carries out finishing of car body, be not reported both at home and abroad so far.
Summary of the invention
The purpose of the present invention is to solve the deficiency of the above background technology, provides a kind of nanometer of pre-treatment and exempts from middle Tu Shui Property the mating finishing of car body method of paint, pass through suitable technical process and equipment Design, the setting of reasonable technological parameter and prison Control controls vehicle body in each process coating surface quality state.
The technical solution of the present invention is as follows: a kind of nanometer of pre-treatment and exempt from the middle mating finishing of car body method of painting water paint, It is characterized in that, steps are as follows: nanometer pre-treatment → electrophoretic painting → electrophoresis is dried → apply PVC sealant and stone-impact-proof paint → Middle painting water colour paint → water colour paint preliminary drying → lacquer varnish → finishing coat drying is exempted from PVC glue preliminary drying → spraying；
The nanometer pre-treating technology: including silane zirconates combined processing, the silane zirconates combined processing are as follows: use silicon Alkane zirconates complexing agent and deionized water are made into tank liquor, complete to soak, and handle time 150-240s, and 33-37 DEG C of temperature, pH value 4.4-4.9；
Middle painting water colour paint technique is exempted from the spraying: aqueous functional colored paint B0 and aqueous effect colored paint B1 is used, outside vehicle body The surface aqueous functional colored paint B0 that first automatic coating thickness is 12-15 μm, then the aqueous effect that automatic coating thickness is 10-18 μm Colored paint B1；Vehicle body inner surface only hand spray with a thickness of 10-18 μm of aqueous effect colored paint B1.
Preferably, the nanometer pre-treating technology process includes: that multiple washing → silane zirconates combined processing → continuation is more Secondary washing,
In the multiple washing, last time washing is soaked entirely using deionized water, and time 60-150s is handled, be washed till from Sub- water conductivity≤300 μ s/cm；
It washes in the multiple washing of continuation and is sprayed using deionized water for the last time, handle time 30-90s, be washed till Ion water conductivity≤30 μ s/cm.
Preferably, during the nanometer pre-treating technology, silane zirconates composite treating agent and deionized water match to obtain tank liquor It is interior: zirconium content 100-200mg/L, copper content 0.8-2.4mg/L, free fluorine content 30-45mg/L, silicone content 25-55mg/L, pH Value 4.4-4.9.
Preferably, the electrophoresis coating technique process includes: electrophoresis → repeatedly deionization washing；
The electrophoresis are as follows: complete to soak, solid part 19-22%, ash content 15-19%, conductivity 1300-2000 μ in electrophoresis groove liquid S/cm, pH value 5.8-6.5；
In the multiple deionization washing, it is washed till 5 μ s/cm of deionized water conductivity < for the last time.
Preferably, the electrophoresis drying is dried using two sections, 110-130 DEG C of first segment drying temperature, time 2-4min, the Two sections of drying temperatures are 165-195 DEG C, time 12-25min.
Preferably, the spraying is exempted from middle painting water colour paint technique: outer surface sprays B0 automatically, outer surface sprays B1 automatically Between flash-off time be greater than 4min；
Outer surface sprays B1 automatically as the spraying of two standing postures, sprays 6-10 μm of first stop coating thickness automatically；Second station spraying 4-8 μm of thickness.
Preferably, the water paint preliminary drying technical process are as follows: heating → heat preservation → cooling,
The heating process time 3-4min, 30-50 DEG C of car body temperature；
The heat preservation method time 3-4min, 60-65 DEG C of car body temperature；
The cooling technique time 2-3min, 30-35 DEG C of car body temperature.
Preferably, the lacquer varnish technical process are as follows: vehicle body inner surface hand spray is with a thickness of 35-40 μm of varnish Afterwards, then in the automatic coating thickness of vehicle body outside surface the varnish for being 40-45 μm.
Preferably, the finishing coat stoving process are as follows: 140-150 DEG C of drying temperature, drying time 20-25min.
Further, the plate used on vehicle body includes heat zinc coating plate and cold-reduced sheet, by the nanometer pre-treatment rear car Zirconium content is 80-180mg/m in gained conversion film on the heat zinc coating plate of body2, vehicle body cold-reduced sheet on gained conversion film in zirconium contain Amount is 30-100mg/m2。
The 5 μ s/cm of original conductivity < of deionized water used in the present invention.
Silane zirconates composite treating agent uses 9831 silane zirconates composite treating agent of Oxsilan, Oxsilan in the present invention 9831 be Kai Miteer chemical company silane treatment product.
After vehicle body outside surface refers to that the opening tools such as car door, luggage-boot lid, engine engine lid are closed in the present invention, vehicle body is visible Part；After vehicle body inner surface refers to the above-mentioned opening tool of opening, opening tool inside and engine bin, storage room, body sill, doorframe etc. Interior zone.
The invention has the benefit that
1. zinc-nickel manganese ternary phosphorizing liquid causes containing harmful heavy metals such as nickel ion, manganese ions in the waste water generated, originally Invention use nanometer pretreatment technology, using without containing nickel, manganese heavy metal non-phosphatic type reagent, while environmentally friendly Fine and close nanometer scale ceramics conversion film is formed on vehicle body, increases metal corrosion-resistant ability and paint adhesion.And the prior art The phosphating coat that middle ternary phosphatization pre-treatment obtains is about 1-2 μm, and gained conversion film thickness is about 0.1 μ after nanometer pre-treatment M, an order of magnitude smaller than thickness before.
2. developing and nanometer pre-treatment and exempting from the middle mating finishing of car body method of painting water paint, during traditional solvent type has It include: middle painting spray painting in lacker finish, middle painting is dried, middle painting is polished, subsequent dedusting, completely left out middle painting work in the present invention Skill has saved production equipment, workshop, artificial etc..Compared to phosphatization pre-treatment and solvent type have in paint mating traditional coating side Method, coating process plant area of the present invention reduce 9200m2(save 1/4 plant area), production line reduce investment outlay about 50,000,000 Yuan, the construction period shortens 1/5.
3. the vehicle body appearance obtained is horizontal, performance reaches traditional coating process level, solvent in traditional solvent-type paint Content is up to 80%, and water colour paint organic solvent used in the present invention is only 10%, and therefore, (VOC) is discharged in entire technique 60% is reduced, discharge of wastewater decline 28%, heavy metal waste slag zero-emission, energy consumption declines 26%, bicycle coating overall cost Decline 13%, whole environmental protection energy-saving effect is better than single use nanometer pretreatment technology or exempts from middle painting water paint technology.
4. environmental protection income of the invention is very big, there is the discharge of significant low pollution object, energy-saving social benefit.
Detailed description of the invention
Fig. 1 is process flow chart of the invention
Specific embodiment
Embodiment 1
As shown in Figure 1, nanometer pre-treatment of the present invention and exempting from the middle mating finishing of car body method of painting water paint, step is such as Under: nanometer pre-treatment → electrophoretic painting → electrophoresis is dried → applies PVC sealant and stone-impact-proof paint → PVC glue preliminary drying → spraying is exempted from Middle painting water colour paint → water colour paint preliminary drying → lacquer varnish → finishing coat drying.
Nanometer pre-treating technology: 1 → rouge of degreasing, 2 → washing of de- 2 → washing, 1 → washing, 3 → silane zirconates combined processing → Washing 4 → washing 5 → washing 6,
Degreasing 1 are as follows: spray, processing time are 150s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 1, wherein free alkali 6.0-15.0pt, pH value 10-11.5；
Degreasing 2 are as follows: full leaching, processing time are 250s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 2, wherein free alkali 9.0-20.0pt, pH value 10-11.5；
Washing 1 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 7-11.8, conductivity≤3000 μs/cm；
Washing 2 are as follows: industry water soaks entirely, handle time 120s, room temperature, industrial washing to pH value 6-9.5, be washed till conductivity≤ 1000μs/cm；
Washing 3 are as follows: deionized water is soaked entirely, room temperature, is handled time 60-150s (preferably 120s), deionized water is washed till pH value 6.5-8.9 is washed till conductivity≤300 μ s/cm；
Silane zirconates combined processing: use Kai Miteer chemical company product Oxsilan9831 multiple as silane zirconates Inorganic agent is closed, is made into tank liquor with deionized water, complete to soak, processing time 150-240s, 33-37 DEG C of temperature (preferred 90s, 34 DEG C), in tank liquor: zirconium content 100-200mg/L, copper content 0.8-2.4mg/L, free fluorine content 30-45mg/L, silicone content 25- 55mg/L, pH value 4.4-4.9, conductivity < 4000 μ s/cm, (preferably zirconium content 120mg/L, copper content 1mg/L, free fluorine content 32mg/L, silicone content 30mg/L, pH value 4.8)；
Washing 4 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 6.5-9, conductivity≤400 μ s/cm；
Washing 5 are as follows: deionized water is soaked entirely, handles time 120s, room temperature, and deionized water is washed till pH value 5.5-8, conductivity≤ 50μs/cm；
Washing 6 are as follows: deionized water spray is handled time 30-90s (preferably 50s), room temperature, deionized water is washed till conductivity ≤30μs/cm。
In the treated conversion film of pre-treatment final inspection vehicle body, hot-dip galvanizing sheet steel zirconium content is 80-180mg/m2(preferably 120mg/m2), cold-reduced sheet zirconium content is 30-100mg/m2(preferably 50mg/m2)。
Above-mentioned degreasing 1, degreasing 2 use Gardoclean S 5176 and Gardobond Additive H7419 degreasing Agent；Gardoclean S 5176 and Gardobond Additive H741 9 is the metal of Gardobond company, Germany production Surface treating additive.The pH value 6.8-7.5 of the industry water used, conductivity 300-400 μ s/cm.
Electrophoretic painting: → deionization 1 → deionization of washing washing 2 is washed in electrophoresis → ultrafiltration,
Electrophoresis: processing mode is full leaching, and material is POWERNICS 1421F-2 resin and POWERNICS 1421F-1 face Slurry (being Japanese ippon Products), time 210-230s, 28-32 DEG C of temperature (preferably 210s, 30 DEG C) match to obtain electrophoresis tank Liquid: solid part 19-22% (mass fraction), ash content 15-19% (mass fraction), conductivity 1300-2000 μ s/cm, pH value 5.8-6.5, MEQ acid value 20-28meq, solvent content 0.8-1.8% (mass fraction), (preferably solid part 20%, ash content 18%, 1500 μ s/cm of conductivity, pH value 6, MEQ acid value 24meq, solvent content 1%) electrophoretic voltage use two-period form, one section of electricity of electrophoresis Press 230V, two sections of voltage 260V.18-24 μm of vehicle body outside surface electrophoretic paint thickness (preferably 20 μm).
Ultrafiltration is washed: being rinsed using ultrafiltrate in electrophoresis tank, is washed till solid part < 0.1% in ultrafiltrate.
Deionization washing 1: 50 μ s/cm of deionized water conductivity <, solid part < 0.1% are washed till.
Deionization washing 2: 5 μ s/cm of deionized water conductivity <, pH value 5.5-7.0 are washed till.
To eliminate electrophoresis striped, electrophoresis tank entrance is equipped with deionized water and is sprayed, and guarantees that vehicle body is entirely wet and enters electrophoresis tank；To subtract Few horizontal plane electrophoretic particles, ultrafiltration wash 2 and ultrafiltration wash between 3 equipped with the wet sander of electrophoretic particles；To reduce electrophoretic paint tumor, After fresh deionized water is washed, entering to dry does stokehold, equipped with wide-angle water logging rolling bed.
Electrophoresis drying: being dried, 110-130 DEG C of first segment drying temperature using two-period form, time 2-4min (preferably 115 DEG C, 3min)；165-195 DEG C of second segment drying temperature, time 12-25min (preferably 190 DEG C, 15min).
Apply PVC sealant and stone-impact-proof paint: the material used is that (Henkel Corp. produces TEROLAN8540CN sealant Product), BETAGVARD DC2010/13 stone-impact-proof paint (U.S. Essex Products), sealant be squeezing and coating construction, anti-stone Hitting coating is spraying application, 500-600 μm of stone-impact-proof paint coating thickness (preferably 550 μm).
PVC glue preliminary drying: 140-160 DEG C of drying temperature, drying time 10-15min (preferably 150 DEG C, 10min).
Middle painting water colour paint is exempted from spraying: using aqueous functional colored paint B0 (any, this reality in white, light grey, Dark grey Applying is white in example) and aqueous effect colored paint B1 (the plain color colored paint or metal flash paint of various colors, such as: white colored paint, bohr Mostly red metal flash paint, shark ash metal flash paint, amber palm fibre metallic paint, carbon crystal Summoning paint are white color in the present embodiment Paint), the first automatic coating thickness of vehicle body outside surface is the aqueous functional colored paint B0 of 12-15 μm (preferably 13 μm), then automatic spraying thickness The aqueous effect colored paint B1 that degree is 10-18 μm (preferably 13 μm)；Vehicle body inner surface only hand spray with a thickness of 10-18 μm (preferably 13 μm) aqueous effect colored paint B1.The spraying of vehicle body outside surface and inner surface is independent, has no sequencing restriction, but because existing Technique outer lower face surface spray automatically B0 will lead to part spray to inner surface, therefore spray outer surface B0 use hand spray Inner surface B1, then automatic spraying outer surface B1.
Outer surface, which sprays B0, outer surface automatically and sprays between B1 flash-off time automatically, is greater than 4min；Outer surface sprays automatically B0 sprays flow 550cc/min, high pressure 80KV, revolving speed 50kt/min automatically；Outer surface sprays B1 for the spraying of two standing postures, certainly automatically Dynamic spraying 6-10 μm of first stop coating thickness (preferably 7 μm), first stop flow 450cc/min, high pressure 70KV, revolving speed 50kt/ min；4-8 μm of second station coating thickness (preferably 6 μm), second station flow 250cc/min, high pressure 70KV, revolving speed 55kt/min.
Water colour paint preliminary drying: heating → heat preservation → cooling,
The heating process time 3-4min, 30-50 DEG C of car body temperature (preferably 3min, 40 DEG C)；
The heat preservation method time 3-4min, 60-65 DEG C of car body temperature (preferably 3min, 60 DEG C)；
The cooling technique time 2-3min, 30-35 DEG C of car body temperature (preferably 2min, 30 DEG C).
Lacquer varnish: after varnish of the vehicle body inner surface hand spray with a thickness of 35-40 μm (preferably 35 μm), then outside vehicle body The automatic coating thickness in surface is the varnish of 40-45 μm (preferably 40 μm), and the material used is two-component solvent-based varnishes, and varnish is certainly Dynamic spraying flow 550cc/min, high pressure 80KV,.
Finishing coat drying: 140-150 DEG C of drying temperature, drying time 20-25min (preferably 150 DEG C, 20min).
Embodiment 2
As shown in Figure 1, nanometer pre-treatment of the present invention and exempting from the middle mating finishing of car body method of painting water paint, step is such as Under: nanometer pre-treatment → electrophoretic painting → electrophoresis is dried → applies PVC sealant and stone-impact-proof paint → PVC glue preliminary drying → spraying is exempted from Middle painting water colour paint → water colour paint preliminary drying → lacquer varnish → finishing coat drying.
Nanometer pre-treating technology: 1 → rouge of degreasing, 2 → washing of de- 2 → washing, 1 → washing, 3 → silane zirconates combined processing → Washing 4 → washing 5 → washing 6,
Degreasing 1 are as follows: spray, processing time are 150s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 1, wherein free alkali 6.0-15.0pt, pH value 10-11.5；
Degreasing 2 are as follows: full leaching, processing time are 250s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 2, wherein free alkali 9.0-20.0pt, pH value 10-11.5；
Washing 1 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 7-11.8, conductivity≤3000 μs/cm；
Washing 2 are as follows: industry water soaks entirely, handle time 120s, room temperature, industrial washing to pH value 6-9.5, be washed till conductivity≤ 1000μs/cm；
Washing 3 are as follows: deionized water is soaked entirely, room temperature, handles time 60s, and deionized water is washed till pH value 6.5-8.9, is washed till electricity Conductance≤300 μ s/cm；
Silane zirconates combined processing: use Kai Miteer chemical company product Oxsilan 9831 multiple as silane zirconates Inorganic agent is closed, is made into tank liquor with deionized water, it is complete to soak, handle time 150s, 33 DEG C of temperature, in tank liquor: zirconium content 100mg/L, Copper content 0.8mg/L, free fluorine content 30mg/L, silicone content 25mg/L, pH value 4.4, conductivity < 4000 μ s/cm；
Washing 4 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 6.5-9, conductivity≤400 μ s/cm；
Washing 5 are as follows: deionized water is soaked entirely, handles time 120s, room temperature, and deionized water is washed till pH value 5.5-8, conductivity≤ 50μs/cm；
Washing 6 are as follows: deionized water spray handles time 30s, room temperature, and deionized water is washed till conductivity≤30 μ s/cm.
In the treated conversion film of pre-treatment final inspection vehicle body, hot-dip galvanizing sheet steel zirconium content is 80mg/m2, cold-reduced sheet zirconium contains Amount is 30mg/m2。
Above-mentioned degreasing 1, degreasing 2 use Gardoclean S 5176 and Gardobond Additive H7419 degreasing Agent；Gardoclean S 5176 and Gardobond Additive H741 9 is the metal of Gardobond company, Germany production Surface treating additive.The pH value 6.8-7.5 of the industry water used, conductivity 300-400 μ s/cm.
Electrophoretic painting: → deionization 1 → deionization of washing washing 2 is washed in electrophoresis → ultrafiltration,
Electrophoresis: processing mode is full leaching, and material is POWERNICS 1421F-2 resin and POWERNICS 1421F-1 face Slurry (being Japanese ippon Products), time 210s, match to obtain the electrophoresis groove liquid: (quality point of solid part 19% by 28 DEG C of temperature Number), ash content 15% (mass fraction), 1300 μ s/cm of conductivity, pH value 5.8, MEQ acid value 20meq, solvent content 0.8%, electricity Voltage of swimming uses two-period form, electrophoresis one section of voltage 230V, two sections of voltage 260V.18 μm of vehicle body outside surface electrophoretic paint thickness.
Ultrafiltration is washed: being rinsed using ultrafiltrate in electrophoresis tank, is washed till solid part < 0.1% in ultrafiltrate.
Deionization washing 1: 50 μ s/cm of deionized water washing lotion conductivity <, solid part < 0.1% are washed till.
Deionization washing 2: 5 μ s/cm of deionized water conductivity <, pH value 5.5-7.0 are washed till.
To eliminate electrophoresis striped, electrophoresis tank entrance is equipped with deionized water and is sprayed, and guarantees that vehicle body is entirely wet and enters electrophoresis tank；To subtract Few horizontal plane electrophoretic particles, ultrafiltration wash 2 and ultrafiltration wash between 3 equipped with the wet sander of electrophoretic particles；To reduce electrophoretic paint tumor, After fresh deionized water is washed, entering to dry does stokehold, equipped with wide-angle water logging rolling bed.
Electrophoresis drying: it is dried using two-period form, 110 DEG C of first segment drying temperature, time 2min；Second segment drying temperature 165 DEG C, time 12min.
Apply PVC sealant and stone-impact-proof paint: the material used is that (Henkel Corp. produces TEROLAN 8540CN sealant Product), BETAGVARD DC2010/13 stone-impact-proof paint, sealant be squeezing and coating construction, stone-impact-proof paint is spraying application, anti-stone Hit 500 μm of coating coating thickness.
PVC glue preliminary drying: 140 DEG C of drying temperature, drying time 10min.
Middle painting water colour paint is exempted from spraying: using aqueous functional colored paint B0 (any, this reality in white, light grey, Dark grey Applying is light grey in example) and aqueous effect colored paint B1 (the plain color colored paint or metal flash paint of various colors, such as: white colored paint, wave Your how red metal flash paint, shark ash metal flash paint, amber palm fibre metallic paint, carbon crystal Summoning paint is bohr in the present embodiment Mostly red metal flash paint).The vehicle body outside surface aqueous functional colored paint B0 that first automatic coating thickness is 12 μm, then automatic coating thickness For 10 μm of aqueous effect colored paint B1；Vehicle body inner surface only hand spray with a thickness of 10 μm of aqueous effect colored paint B1.Outside vehicle body The spraying of surface and inner surface is independent, has no sequencing restriction, but will lead to because prior art outer lower face surface sprays B0 automatically Part sprays to inner surface, therefore has sprayed the B0 of outer surface using hand spray inner surface B1, then automatic spraying outer surface B1.
It is 5min that outer surface, which sprays B0, outer surface automatically and sprays flash-off time between B1 automatically,；Outer surface sprays B0 automatically Automatic spraying flow 550cc/min, high pressure 80KV, revolving speed 50kt/min；Outer surface sprays B1 for the spraying of two standing postures, automatically automatically 6 μm of first stop coating thickness of spraying, first stop flow 450cc/min, high pressure 70KV, revolving speed 50kt/min；Second station spraying is thick 4 μm of degree, second station flow 250cc/min, high pressure 70KV, revolving speed 55kt/min.
Water colour paint preliminary drying: heating → heat preservation → cooling,
The heating process time 3min, 30 DEG C of car body temperature；
The heat preservation method time 3min, car body temperature 60 C；
The cooling technique time 2min, 30 DEG C of car body temperature.
Lacquer varnish: it after vehicle body inner surface hand spray is with a thickness of 35 μm of varnish, then sprays automatically in vehicle body outside surface With a thickness of 40 μm of varnish, the material used is two-component solvent-based varnishes, and varnish sprays flow 550cc/min, high pressure automatically 80KV。
Finishing coat drying: 140 DEG C of drying temperature, drying time 20min.
Embodiment 3
As shown in Figure 1, nanometer pre-treatment of the present invention and exempting from the middle mating finishing of car body method of painting water paint, step is such as Under: nanometer pre-treatment → electrophoretic painting → electrophoresis is dried → applies PVC sealant and stone-impact-proof paint → PVC glue preliminary drying → spraying is exempted from Middle painting water colour paint → water colour paint preliminary drying → lacquer varnish → finishing coat drying.
Nanometer pre-treating technology: 1 → rouge of degreasing, 2 → washing of de- 2 → washing, 1 → washing, 3 → silane zirconates combined processing → Washing 4 → washing 5 → washing 6,
Degreasing 1 are as follows: spray, processing time are 150s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 1, wherein free alkali 6.0-15.0pt, pH value 10-11.5；
Degreasing 2 are as follows: full leaching, processing time are 250s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 2, wherein free alkali 9.0-20.0pt, pH value 10-11.5；
Washing 1 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 7-11.8, conductivity≤3000 μs/cm；
Washing 2 are as follows: industry water soaks entirely, handle time 120s, room temperature, industrial washing to pH value 6-9.5, be washed till conductivity≤ 1000μs/cm；
Washing 3 are as follows: deionized water is soaked entirely, room temperature, handles time 150s, and deionized water is washed till pH value 6.5-8.9, is washed till electricity Conductance≤300 μ s/cm；
Silane zirconates combined processing: use Kai Miteer chemical company product Oxsilan9831 multiple as silane zirconates Inorganic agent is closed, is made into tank liquor with deionized water, it is complete to soak, handle time 240s, 37 DEG C of temperature, in tank liquor: zirconium content 200mg/L, Copper content 2.4mg/L, free fluorine content 45mg/L, silicone content 55mg/L, pH value 4.9, conductivity < 4000 μ s/cm；
Washing 4 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 6.5-9, conductivity≤400 μ s/cm；
Washing 5 are as follows: deionized water is soaked entirely, handles time 120s, room temperature, and deionized water is washed till pH value 8, conductivity≤50 μ s/cm；
Washing 6 are as follows: deionized water spray handles time 90s, room temperature, and deionized water is washed till conductivity≤30 μ s/cm.
In the treated conversion film of pre-treatment final inspection vehicle body, hot-dip galvanizing sheet steel zirconium content is 180mg/m2, cold-reduced sheet zirconium Content is 100mg/m2。
Above-mentioned degreasing 1, degreasing 2 use Gardoclean S 5176 and Gardobond Additive H7419 degreasing Agent；Gardoclean S 5176 and Gardobond Additive H741 9 is the metal of Gardobond company, Germany production Surface treating additive.The pH value 6.8-7.5 of the industry water used, conductivity 300-400 μ s/cm.
Electrophoretic painting: → deionization 1 → deionization of washing washing 2 is washed in electrophoresis → ultrafiltration,
Electrophoresis: processing mode is full leaching, and material is POWERNICS 1421F-2 resin and POWERNICS 1421F-1 face Slurry (being Japanese ippon Products), time 230s, match to obtain the electrophoresis groove liquid: (quality point of solid part 22% by 32 DEG C of temperature Number), ash content 19% (mass fraction), 2000 μ s/cm of conductivity, pH value 6.5, MEQ acid value 28meq, solvent content 1.8%, electricity Voltage of swimming uses two-period form, electrophoresis one section of voltage 230V, two sections of voltage 260V.24 μm of vehicle body outside surface electrophoretic paint thickness.
Ultrafiltration is washed: being rinsed using ultrafiltrate in electrophoresis tank, is washed till solid part < 0.1% in ultrafiltrate.
Deionization washing 1: 50 μ s/cm of deionized water washing lotion conductivity <, solid part < 0.1% are washed till.
Deionization washing 2: 5 μ s/cm of deionized water conductivity <, pH value 5.5-7.0 are washed till.
To eliminate electrophoresis striped, electrophoresis tank entrance is equipped with deionized water and is sprayed, and guarantees that vehicle body is entirely wet and enters electrophoresis tank；To subtract Few horizontal plane electrophoretic particles, ultrafiltration wash 2 and ultrafiltration wash between 3 equipped with the wet sander of electrophoretic particles；To reduce electrophoretic paint tumor, After fresh deionized water is washed, entering to dry does stokehold, equipped with wide-angle water logging rolling bed.
Electrophoresis drying: it is dried using two-period form, 130 DEG C of first segment drying temperature, time 4min；Second segment drying temperature 195 DEG C, time 25min.
Apply PVC sealant and stone-impact-proof paint: the material used is that (Henkel Corp. produces TEROLAN8540CN sealant Product), BETAGVARD DC2010/13 stone-impact-proof paint, sealant be squeezing and coating construction, stone-impact-proof paint is spraying application, anti-stone Hit 600 μm of coating coating thickness.
PVC glue preliminary drying: 160 DEG C of drying temperature, drying time 15min.
Middle painting water colour paint is exempted from spraying: using aqueous functional colored paint B0 (any, this reality in white, light grey, Dark grey Applying is light grey in example) and aqueous effect colored paint B1 (the plain color colored paint or metal flash paint of various colors, such as: white colored paint, wave Your how red metal flash paint, shark ash metal flash paint, amber palm fibre metallic paint, carbon crystal Summoning paint is shark in the present embodiment Grey metal flash paint).The vehicle body outside surface aqueous functional colored paint B0 that first automatic coating thickness is 15 μm, then automatic coating thickness is 18 μm of aqueous effect colored paint B1；Vehicle body inner surface only hand spray with a thickness of 18 μm of aqueous effect colored paint B1.Vehicle body appearance The spraying of face and inner surface is independent, has no sequencing restriction, but will lead to portion because prior art outer lower face surface sprays B0 automatically Divide and spray to inner surface, therefore has sprayed the B0 of outer surface using hand spray inner surface B1, then automatic spraying outer surface B1.
It is 6min that outer surface, which sprays B0, outer surface automatically and sprays flash-off time between B1 automatically,；Outer surface sprays B0 automatically Automatic spraying flow 550cc/min, high pressure 80KV, revolving speed 50kt/min；Outer surface sprays B1 for the spraying of two standing postures, automatically automatically 10 μm of first stop coating thickness of spraying, first stop flow 450cc/min, high pressure 70KV, revolving speed 50kt/min；Second station spraying is thick 8 μm of degree, second station flow 250cc/min, high pressure 70KV, revolving speed 55kt/min.
Water colour paint preliminary drying: heating → heat preservation → cooling,
The heating process time 4min, car body temperature 50 C；
The heat preservation method time 4min, 65 DEG C of car body temperature；
The cooling technique time 3min, 35 DEG C of car body temperature.
Lacquer varnish: it after vehicle body inner surface hand spray is with a thickness of 40 μm of varnish, then sprays automatically in vehicle body outside surface With a thickness of 45 μm of varnish, the material used is two-component solvent-based varnishes, and varnish sprays flow 550cc/min, high pressure automatically 80KV。
Finishing coat drying: 150 DEG C of drying temperature, drying time 25min.
Embodiment 4
As shown in Figure 1, nanometer pre-treatment of the present invention and exempting from the middle mating finishing of car body method of painting water paint, step is such as Under: nanometer pre-treatment → electrophoretic painting → electrophoresis is dried → applies PVC sealant and stone-impact-proof paint → PVC glue preliminary drying → spraying is exempted from Middle painting water colour paint → water colour paint preliminary drying → lacquer varnish → finishing coat drying.
Nanometer pre-treating technology: 1 → rouge of degreasing, 2 → washing of de- 2 → washing, 1 → washing, 3 → silane zirconates combined processing → Washing 4 → washing 5 → washing 6,
Degreasing 1 are as follows: spray, processing time are 150s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 1, wherein free alkali 6.0-15.0pt, pH value 10-11.5；
Degreasing 2 are as follows: full leaching, processing time are 250s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 2, wherein free alkali 9.0-20.0pt, pH value 10-11.5；
Washing 1 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 7-11.8, conductivity≤3000 μs/cm；
Washing 2 are as follows: industry water soaks entirely, handle time 120s, room temperature, industrial washing to pH value 6-9.5, be washed till conductivity≤ 1000μs/cm；
Washing 3 are as follows: deionized water is soaked entirely, room temperature, handles time 90s, and deionized water is washed till pH value 6.5-8.9, is washed till electricity Conductance≤300 μ s/cm；
Silane zirconates combined processing: use Kai Miteer chemical company product Oxsilan 9831 multiple as silane zirconates Inorganic agent is closed, is made into tank liquor with deionized water, it is complete to soak, handle time 200s, 35 DEG C of temperature, in tank liquor: zirconium content 150mg/L, Copper content 1.6mg/L, free fluorine content 36mg/L, silicone content 40mg/L, pH value 4.6, conductivity < 4000 μ s/cm；
Washing 4 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 6.5-9, conductivity≤400 μ s/cm；
Washing 5 are as follows: deionized water is soaked entirely, handles time 120s, room temperature, and deionized water is washed till pH value 5.5-8, conductivity≤ 50μs/cm；
Washing 6 are as follows: deionized water spray handles time 60s, room temperature, and deionized water is washed till conductivity≤30 μ s/cm.
In the treated conversion film of pre-treatment final inspection vehicle body, hot-dip galvanizing sheet steel zirconium content is 130mg/m2, cold-reduced sheet zirconium Content is 65mg/m2。
Above-mentioned degreasing 1, degreasing 2 use Gardoclean S 5176 and Gardobond Additive H7419 degreasing Agent；Gardoclean S 5176 and Gardobond Additive H741 9 is the metal of Gardobond company, Germany production Surface treating additive.The pH value 6.8-7.5 of the industry water used, conductivity 300-400 μ s/cm.
Electrophoretic painting: → deionization 1 → deionization of washing washing 2 is washed in electrophoresis → ultrafiltration,
Electrophoresis: processing mode is full leaching, and material is POWERNICS 1421F-2 resin and POWERNICS 1421F-1 face Slurry (being Japanese ippon Products), time 220s, match to obtain the electrophoresis groove liquid: (quality point of solid part 20% by 30 DEG C of temperature Number), ash content 17% (mass fraction), 1600 μ s/cm of conductivity, pH value 6.1, MEQ acid value 25meq, solvent content 1.5%, electricity Voltage of swimming uses two-period form, electrophoresis one section of voltage 230V, two sections of voltage 260V.21 μm of vehicle body outside surface electrophoretic paint thickness.
Ultrafiltration is washed: being rinsed using ultrafiltrate in electrophoresis tank, is washed till solid part < 0.1% in ultrafiltrate.
Deionization washing 1: 50 μ s/cm of deionized water washing lotion conductivity <, solid part < 0.1% are washed till.
Deionization washing 2: 5 μ s/cm of deionized water conductivity <, pH value 5.5-7.0 are washed till.
To eliminate electrophoresis striped, electrophoresis tank entrance is equipped with deionized water and is sprayed, and guarantees that vehicle body is entirely wet and enters electrophoresis tank；To subtract Few horizontal plane electrophoretic particles, ultrafiltration wash 2 and ultrafiltration wash between 3 equipped with the wet sander of electrophoretic particles；To reduce electrophoretic paint tumor, After fresh deionized water is washed, entering to dry does stokehold, equipped with wide-angle water logging rolling bed.
Electrophoresis drying: it is dried using two-period form, 120 DEG C of first segment drying temperature, time 3min；Second segment drying temperature 180 DEG C, time 18min.
Apply PVC sealant and stone-impact-proof paint: the material used is that (Henkel Corp. produces TEROLAN 8540CN sealant Product), BETAGVARD DC2010/13 stone-impact-proof paint, sealant be squeezing and coating construction, stone-impact-proof paint is spraying application, anti-stone Hit 550 μm of coating coating thickness.
PVC glue preliminary drying: 150 DEG C of drying temperature, drying time 12min.
Middle painting water colour paint is exempted from spraying: using aqueous functional colored paint B0 (any, this reality in white, light grey, Dark grey Apply in example as Dark grey) and aqueous effect colored paint B1 (the plain color colored paint or metal flash paint of various colors, such as: white colored paint, wave Your how red metal flash paint, shark ash metal flash paint, amber palm fibre metallic paint, carbon crystal Summoning paint is amber in the present embodiment Brown metallic paint).The vehicle body outside surface aqueous functional colored paint B0 that first automatic coating thickness is 13 μm, then automatic coating thickness is 14 μm Aqueous effect colored paint B1；Vehicle body inner surface only hand spray with a thickness of 14 μm of aqueous effect colored paint B1.Vehicle body outside surface with The spraying of inner surface is independent, has no sequencing restriction, but will lead to part spray because prior art outer lower face surface sprays B0 automatically It is coated onto inner surface, therefore has sprayed the B0 of outer surface using hand spray inner surface B1, then automatic spraying outer surface B1.
It is 7min that outer surface, which sprays B0, outer surface automatically and sprays flash-off time between B1 automatically,；Outer surface sprays B0 automatically Automatic spraying flow 550cc/min, high pressure 80KV, revolving speed 50kt/min；Outer surface sprays B1 for the spraying of two standing postures, automatically automatically 8 μm of first stop coating thickness of spraying, first stop flow 450cc/min, high pressure 70KV, revolving speed 50kt/min；Second station spraying is thick 6 μm of degree, second station flow 250cc/min, high pressure 70KV, revolving speed 55kt/min.
Water colour paint preliminary drying: heating → heat preservation → cooling,
The heating process time 3.5min, 40 DEG C of car body temperature；
The heat preservation method time 3.5min, 62 DEG C of car body temperature；
The cooling technique time 2.5min, 32 DEG C of car body temperature.
Lacquer varnish: it after vehicle body inner surface hand spray is with a thickness of 38 μm of varnish, then sprays automatically in vehicle body outside surface With a thickness of 42 μm of varnish, the material used is two-component solvent-based varnishes, and varnish sprays flow 550cc/min, high pressure automatically 80KV。
Finishing coat drying: 145 DEG C of drying temperature, drying time 22min.
Embodiment 5
As shown in Figure 1, nanometer pre-treatment of the present invention and exempting from the middle mating finishing of car body method of painting water paint, step is such as Under: nanometer pre-treatment → electrophoretic painting → electrophoresis is dried → applies PVC sealant and stone-impact-proof paint → PVC glue preliminary drying → spraying is exempted from Middle painting water colour paint → water colour paint preliminary drying → lacquer varnish → finishing coat drying.
Nanometer pre-treating technology: 1 → rouge of degreasing, 2 → washing of de- 2 → washing, 1 → washing, 3 → silane zirconates combined processing → Washing 4 → washing 5 → washing 6,
Degreasing 1 are as follows: spray, processing time are 150s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 1, wherein free alkali 6.0-15.0pt, pH value 10-11.5；
Degreasing 2 are as follows: full leaching, processing time are 250s, 55-59 DEG C of temperature, use 5176 He of Gardoclean S Gardobond Additive H7419 degreasing agent and deionized water match to obtain degreaser 2, wherein free alkali 9.0-20.0pt, pH value 10-11.5；
Washing 1 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 7-11.8, conductivity≤3000 μs/cm；
Washing 2 are as follows: industry water soaks entirely, handle time 120s, room temperature, industrial washing to pH value 6-9.5, be washed till conductivity≤ 1000μs/cm；
Washing 3 are as follows: deionized water is soaked entirely, room temperature, handles time 120s, and deionized water is washed till pH value 6.5-8.9, is washed till electricity Conductance≤300 μ s/cm；
Silane zirconates combined processing: use Kai Miteer chemical company product Oxsilan 9831 multiple as silane zirconates Inorganic agent is closed, is made into tank liquor with deionized water, it is complete to soak, handle time 200s, 36 DEG C of temperature, in tank liquor: zirconium content 180mg/L, Copper content 2mg/L, free fluorine content 40mg/L, silicone content 50mg/L, pH value 4.8, conductivity < 4000 μ s/cm；
Washing 4 are as follows: industrial water spray handles time 50s, room temperature, industrial washing to pH value 6.5-9, conductivity≤400 μ s/cm；
Washing 5 are as follows: deionized water is soaked entirely, handles time 120s, room temperature, and deionized water is washed till pH value 5.5-8, conductivity≤ 50μs/cm；
Washing 6 are as follows: deionized water spray handles time 80s, room temperature, and deionized water is washed till conductivity≤30 μ s/cm.
In the treated conversion film of pre-treatment final inspection vehicle body, hot-dip galvanizing sheet steel zirconium content is 160mg/m2, cold-reduced sheet zirconium Content is 80mg/m2。
Above-mentioned degreasing 1, degreasing 2 use Gardoclean S 5176 and Gardobond Additive H7419 degreasing Agent；Gardoclean S 5176 and Gardobond Additive H741 9 is the metal of Gardobond company, Germany production Surface treating additive.The pH value 6.8-7.5 of the industry water used, conductivity 300-400 μ s/cm.
Electrophoretic painting: → deionization 1 → deionization of washing washing 2 is washed in electrophoresis → ultrafiltration,
Electrophoresis: processing mode is full leaching, and material is POWERNICS 1421F-2 resin and POWERNICS 1421F-1 face Slurry (being Japanese ippon Products), time 225s, match to obtain the electrophoresis groove liquid: (quality point of solid part 21% by 31 DEG C of temperature Number), ash content 18% (mass fraction), 1800 μ s/cm of conductivity, pH value 6, MEQ acid value 26meq, solvent content 1.5%, electrophoresis Voltage uses two-period form, electrophoresis one section of voltage 230V, two sections of voltage 260V.22 μm of vehicle body outside surface electrophoretic paint thickness.
Ultrafiltration is washed: being rinsed using ultrafiltrate in electrophoresis tank, is washed till solid part < 0.1% in ultrafiltrate.
Deionization washing 1: 50 μ s/cm of deionized water washing lotion conductivity <, solid part < 0.1% are washed till.
Deionization washing 2: 5 μ s/cm of deionized water conductivity <, pH value 5.5-7.0 are washed till.
To eliminate electrophoresis striped, electrophoresis tank entrance is equipped with deionized water and is sprayed, and guarantees that vehicle body is entirely wet and enters electrophoresis tank；To subtract Few horizontal plane electrophoretic particles, ultrafiltration wash 2 and ultrafiltration wash between 3 equipped with the wet sander of electrophoretic particles；To reduce electrophoretic paint tumor, After fresh deionized water is washed, entering to dry does stokehold, equipped with wide-angle water logging rolling bed.
Electrophoresis drying: it is dried using two-period form, 125 DEG C of first segment drying temperature, time 3.5min；Second segment drying temperature 180 DEG C, time 20min.
Apply PVC sealant and stone-impact-proof paint: the material used is that (Henkel Corp. produces TEROLAN 8540CN sealant Product), BETAGVARD DC2010/13 stone-impact-proof paint, sealant be squeezing and coating construction, stone-impact-proof paint is spraying application, anti-stone Hit 580 μm of coating coating thickness.
PVC glue preliminary drying: 155 DEG C of drying temperature, drying time 14min.
Middle painting water colour paint is exempted from spraying: using aqueous functional colored paint B0 (any, this reality in white, light grey, Dark grey Apply in example as Dark grey) and aqueous effect colored paint B1 (the plain color colored paint or metal flash paint of various colors, such as: white colored paint, wave Your how red metal flash paint, shark ash metal flash paint, amber palm fibre metallic paint, carbon crystal Summoning paint is carbon crystal in the present embodiment Summoning paint).The vehicle body outside surface aqueous functional colored paint B0 that first automatic coating thickness is 14 μm, then automatic coating thickness is 16 μm Aqueous effect colored paint B1；Vehicle body inner surface only hand spray with a thickness of 16 μm of aqueous effect colored paint B1.Vehicle body outside surface with The spraying of inner surface is independent, has no sequencing restriction, but will lead to part spray because prior art outer lower face surface sprays B0 automatically It is coated onto inner surface, therefore has sprayed the B0 of outer surface using hand spray inner surface B1, then automatic spraying outer surface B1.
It is 6min that outer surface, which sprays B0, outer surface automatically and sprays flash-off time between B1 automatically,；Outer surface sprays B0 automatically Automatic spraying flow 550cc/min, high pressure 80KV, revolving speed 50kt/min；Outer surface sprays B1 for the spraying of two standing postures, automatically automatically 9 μm of first stop coating thickness of spraying, first stop flow 450cc/min, high pressure 70KV, revolving speed 50kt/min；Second station spraying is thick 7 μm of degree, second station flow 250cc/min, high pressure 70KV, revolving speed 55kt/min.
Water colour paint preliminary drying: heating → heat preservation → cooling,
The heating process time 3min, car body temperature 45 C；
The heat preservation method time 3min, 61 DEG C of car body temperature；
The cooling technique time 3min, 34 DEG C of car body temperature.
Lacquer varnish: it after vehicle body inner surface hand spray is with a thickness of 36 μm of varnish, then sprays automatically in vehicle body outside surface With a thickness of 43 μm of varnish, the material used is two-component solvent-based varnishes, and varnish sprays flow 550cc/min, high pressure automatically 80KV,.
Finishing coat drying: 148 DEG C of drying temperature, drying time 25min.
Performance test: by embodiment and traditional coating process body paint appearance of coat quality, performance, environmental protection and energy saving effect And the comparison of cost situation, traditional coating process are to paint technology during phosphatization pre-treatment matching dissolvent type has.
1 present invention of table is compared with conventional method body paint appearance of coat quality
From the data of table 1 as it can be seen that body paint appearance of coat quality level of the present invention reaches conventional method appearance level.
2 present invention of table is compared with conventional method body paint coating main performance
As can be seen from Table 2, painting layer antiseptic property of the present invention is suitable with conventional method, scratch resistance and acid rain resistance can be than passing System method improves, and is conducive to cope with current harsh climate environment.
3 present invention of table is compared with conventional method bicycle coating material organic solvent content
Seen from table 3, the present invention reduces 3.5Kg with respect to conventional method, bicycle consumption of organic solvent.
4 present invention of table is compared with conventional method vehicle body environmental protection and energy saving effect
Conventional method The present invention Compare
VOC yield (g/m2) 50.9 19.7 Reduce by 61%
Heavy metal waste slag yield (g/ platform) 17 0 It completely eliminates
Total waste water yield (Kg/ platform) 395 283 Reduce by 28%
Total energy consumption (KWH/ platform) 605 450 Reduce by 26%
By table 4 as it can be seen that present invention significant effect in terms of reducing VOC emission, heavy metal pollution, waste water and energy saving, Environmentally friendly income is very big.
5 present invention of table is compared with conventional method bicycle coating overall cost
Project Conventional method (member/platform) (member/platform) of the invention Cost declining (member/platform)
Material of paint 494.5 455.3 39.2
The energy 201.4 140.5 60.9
Manually 99.5 91.8 7.7
Auxiliary material 14.8 13.3 1.5
It amounts to 810.2 700.9 109.3
By table 5 as it can be seen that bicycle coating overall cost of the present invention is compared with conventional method decline 13.5%, having reduces painting cost Effect.

Claims (8)

1. a kind of nanometer of pre-treatment and exempting from the middle mating finishing of car body method of painting water paint, which is characterized in that steps are as follows: receiving Rice pre-treatment → electrophoretic painting → electrophoresis is dried → applies PVC sealant and middle painting is exempted from stone-impact-proof paint → PVC glue preliminary drying → spraying Water colour paint → water colour paint preliminary drying → lacquer varnish → varnish drying；
The nanometer pre-treating technology: including silane zirconates combined processing, the silane zirconates combined processing are as follows: use silane zirconium Salt complexing agent and deionized water are made into tank liquor, complete to soak, and handle time 150-240s, and 33-37 DEG C of temperature, pH value 4.4-4.9, silane Zirconates composite treating agent and deionized water in tank liquor: zirconium content 100-200mg/L, copper content 0.8-2.4mg/L, free fluorine Content 30-45mg/L, silicone content 25-55mg/L, tank liquor pH value 4.4-4.9, the plate used on vehicle body include heat zinc coating plate and Cold-reduced sheet, zirconium content is 80-180mg/m in gained conversion film on the heat zinc coating plate by the nanometer pre-treatment rear2, vehicle Zirconium content is 30-100mg/m in gained conversion film on the cold-reduced sheet of body2；
Middle painting water colour paint technique is exempted from the spraying: using aqueous functional colored paint B0 and aqueous effect colored paint B1, the aqueous function Energy colored paint B0 is any colored paint in white, light grey, Dark grey, and the aqueous effect colored paint B1 is the plain color color of various colors Paint or metal flash paint, the vehicle body outside surface aqueous functional colored paint B0 that first automatic coating thickness is 12-15 μm, then automatic spraying are thick The aqueous effect colored paint B1 that degree is 10-18 μm；Vehicle body inner surface only hand spray with a thickness of 10-18 μm of aqueous effect colored paint B1。
2. a kind of nanometer of pre-treatment as described in claim 1 and exempting from the middle mating finishing of car body method of paintings water paint, spy Sign is that the nanometer pre-treating technology process includes: that multiple washing → silane zirconates combined processing → continuation is repeatedly washed,
In the multiple washing, last time washing is soaked entirely using deionized water, is handled time 60-150s, is washed till deionized water Conductivity≤300 μ s/cm；
Repeatedly in washing, last time washing is sprayed using deionized water for the continuation, is handled time 30-90s, is washed till deionization Water conductivity≤30 μ s/cm.
3. a kind of nanometer of pre-treatment as described in claim 1 and exempting from the middle mating finishing of car body method of paintings water paint, spy Sign is that the electrophoresis coating technique process includes: electrophoresis → repeatedly deionization washing；
The electrophoresis are as follows: complete to soak, solid part mass fraction 19-22%, ash content mass fraction 15-19%, conductance in electrophoresis groove liquid Rate 1300-2000 μ s/cm, pH value 5.8-6.5；
In the multiple deionization washing, it is washed till 5 μ s/cm of deionized water conductivity < for the last time.
4. a kind of nanometer of pre-treatment as described in claim 1 and exempting from the middle mating finishing of car body method of paintings water paint, spy Sign is that the electrophoresis drying is using two sections of drying, 110-130 DEG C of first segment drying temperature, time 2-4min, second segment drying Temperature is 165-195 DEG C, time 12-25min.
5. a kind of nanometer of pre-treatment as described in claim 1 and exempting from the middle mating finishing of car body method of paintings water paint, spy Sign is that the spraying is exempted from middle painting water colour paint technique: outer surface spray automatically B0, outer surface spray automatically dodged between B1 it is dry Time is greater than 4min；
Outer surface sprays B1 automatically as the spraying of two standing postures, sprays 6-10 μm of first stop coating thickness automatically；Second station coating thickness 4-8μm。
6. a kind of nanometer of pre-treatment as described in claim 1 and exempting from the middle mating finishing of car body method of paintings water paint, spy Sign is, the water colour paint preliminary drying technical process are as follows: heating → heat preservation → cooling,
The heating process time 3-4min, 30-50 DEG C of car body temperature；
The heat preservation method time 3-4min, 60-65 DEG C of car body temperature；
The cooling technique time 2-3min, 30-35 DEG C of car body temperature.
7. a kind of nanometer of pre-treatment as described in claim 1 and exempting from the middle mating finishing of car body method of paintings water paint, spy Sign is, the lacquer varnish technical process are as follows: after vehicle body inner surface hand spray is with a thickness of 35-40 μm of varnish, then The varnish that the automatic coating thickness of vehicle body outside surface is 40-45 μm.
8. a kind of nanometer of pre-treatment as described in claim 1 and exempting from the middle mating finishing of car body method of paintings water paint, spy Sign is, the varnish stoving process are as follows: 140-150 DEG C of drying temperature, drying time 20-25min.
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CN108360043A (en) * 2018-01-04 2018-08-03 湖南吉利汽车部件有限公司 A kind of Car Body Painting method
CN110129783A (en) * 2019-04-15 2019-08-16 汉腾汽车有限公司 A kind of Pretreatment Technology Before Finishing
CN110813680A (en) * 2019-11-15 2020-02-21 襄阳航林机械有限公司 Rust prevention method for cast iron cylinder body by heating infiltration
CN111763981A (en) * 2020-07-31 2020-10-13 东风本田汽车有限公司 Vehicle body coating process matched with amino resin modified zirconium salt pretreatment and electrophoresis
CN115739571B (en) * 2022-11-15 2023-11-21 东风柳州汽车有限公司 Coating method for collinear coating of paint

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CN103031584A (en) * 2012-12-06 2013-04-10 安徽未来表面技术有限公司 Process of silane-zirconium salt conversion treatment before metal cathode electrophoresis coating

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