CN107034501A - A kind of engine periphery water tube surfaces handling process and its electrophoresis tool - Google Patents

A kind of engine periphery water tube surfaces handling process and its electrophoresis tool Download PDF

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Publication number
CN107034501A
CN107034501A CN201710470339.1A CN201710470339A CN107034501A CN 107034501 A CN107034501 A CN 107034501A CN 201710470339 A CN201710470339 A CN 201710470339A CN 107034501 A CN107034501 A CN 107034501A
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workpiece surface
workpiece
wash
time
temperature
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向可友
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Zhuhai MST Hardware Plastic Products Co Ltd
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Zhuhai MST Hardware Plastic Products Co Ltd
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Priority to CN201710470339.1A priority Critical patent/CN107034501A/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • C25D13/14—Tubes; Rings; Hollow bodies
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/20—Pretreatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • C25D17/08—Supporting racks, i.e. not for suspending
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The invention discloses a kind of engine periphery water tube surfaces handling process, including rack plating zinc-nickel and electrophoretic painting；Rack plating zinc-nickel comprises the following steps, and 1) surface preparation；2) rack plating zinc-nickel；3) wash, remove the plating solution of workpiece surface residual；4) blueness passivation, one layer of fine and close chemical composition coating of Zinc-Nickel coating layer Surface Creation；5) wash, remove the passivating solution of workpiece surface residual；6) dry.Electrophoretic painting comprises the following steps, and 1) surface degreasing；2) table is adjusted, and using zinc salt pre-treatment surface conditioner, changes the microstate of metal surface；3) phosphatization, one layer of phosphate coating with corrosion resistance and alkali resistance is generated in workpiece surface；4) wash, remove the phosphatization acid solution of workpiece surface residual；5) black electrophore tic, conductive workpiece is immersed in electrophoretic coating groove as negative electrode, leads to direct current in two interpolars, and uniform, water-insoluble black coating is separated out on workpiece, improves the paint adhesive rate of electrophoretic paint, improves salt spray resistance ability.

Description

A kind of engine periphery water tube surfaces handling process and its electrophoresis tool
Technical field
The present invention relates to electrophoretic techniques field, more particularly to engine periphery water tube surfaces handling process and its electrophoresis is controlled Tool.
Background technology
Electrophoretic paint has been widely used for industrial circle, the characteristics of it has low energy consumption, pollutes small, existing electrophoresis process In, on the premise of more low energy consumption, more low stain is pursued, the paint adhesive rate of electrophoretic paint is improved as far as possible, improves salt spray resistance ability, It is the target that those skilled in the art constantly pursue.Existing technique is in processing procedure there is still a need for further lifting.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of engine periphery water tube surfaces handling process and its electrophoresis Tool, improves the paint adhesive rate of electrophoretic paint, improves salt spray resistance ability, caused above-mentioned multinomial scarce in the prior art to solve Fall into.
To achieve the above object, the present invention provides following technical scheme：A kind of engine periphery water tube surfaces science and engineering Skill, including rack plating zinc-nickel and electrophoretic painting；
Rack plating zinc-nickel comprises the following steps,
1) surface preparation, is handled workpiece surface, and the dirt of workpiece surface is cleaned out；
2) rack plating zinc-nickel, plating solution, which is constituted, is：Sodium hydroxide：110-130g/L、Ni2+6-7g/L；Ni2+/Ni2+4-7；Plating Temperature：19-22 DEG C, electroplating time 30-50min, voltage：3-5V；
3) wash, remove the plating solution of workpiece surface residual；
4) blueness passivation：Passivating solution pH value：4.2-4.8, temperature：20-40 DEG C, time：90-150S, Zinc-Nickel coating layer surface Generate one layer of fine and close chemical composition coating；
5) wash, remove the passivating solution of workpiece surface residual；
6) dry, temperature：60-100 DEG C, time：25-45min；
Electrophoretic painting comprises the following steps,
1) surface degreasing, ungrease treatment is carried out to workpiece surface, greasy dirt is departed from workpiece surface, deoiling；
2) table is adjusted, and using zinc salt pre-treatment surface conditioner, changes microstate, the activation workpiece surface of metal surface, SURFFINEGL：1.0-3.0g/L, time：69±5S；
3) phosphatization, total acidity：16-25, free acidity：0.7-1.1, temperature：35-45 DEG C, Toner values：1.2-2.0, when Between：265 ± 10S, one layer of phosphate coating with corrosion resistance and alkali resistance is generated in workpiece surface；
4) wash, remove the phosphatization acid solution of workpiece surface residual；
5) black electrophore tic, conductive workpiece is immersed in electrophoretic coating groove as negative electrode, logical straight in two interpolars Stream electricity, separates out uniform, water-insoluble black coating, solid part on workpiece：19-21%, temperature：28-32 DEG C, time：230± 10Sec, voltage：160V±10V；
6) wash, remove the electrophoretic coating of workpiece surface residual；
7) dry, temperature：170-190 DEG C, time：2400±10Sec.
It is preferred that, the step 1 of the rack plating zinc-nickel) comprise the following steps,
1a) electrochemical deoiling, oil removing twice, temperature are at least carried out using degreaser：50-70 DEG C, time：5-10min, this is removed Finish；
Workpiece, is done anode by 1b) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：50-70 DEG C, time：5-10min, voltage： 4-6V；
1c) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1d) ultrasonic oil removal, using special ultrasonic oil removal agent, the bubble and degreaser produced using ultrasonic wave is dual Effect, cleans up workpiece surface greasy dirt, temperature：50-70 DEG C, time：3-5min；
Workpiece, is done anode by 1e) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：50-70 DEG C, time：5-10min, voltage： 4-6V；
1f) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1g) activate, the clear low-level oxidation film of workpiece surface is removed using low-concentration hcl, the time：1-3min；
1h) wash, using duplex countercurrent rinsing mode, the hydrochloric acid of workpiece surface is cleaned up.
It is preferred that, the step 3 in the rack plating zinc-nickel) comprise the following steps,
Washing 3a) is exchanged, exchange washing efficiently avoid product and be oxidized on the move, protect coating；
3b) wash, using duplex countercurrent rinsing mode, the plating solution of workpiece surface is cleaned up；
3c) ultrasonic wave water washing, the medicament of process residual before being removed using ultrasonic wave, moreover it is possible to make workpiece crack or welding Position obtains effective cleaning；
3d) neutralize, utilize sour further cleaning coating surface, time：5-15S；
3e) wash, using duplex countercurrent rinsing mode, the acid solution of workpiece surface is cleaned up.
It is preferred that, the step 5 in the rack plating zinc-nickel) comprise the following steps,
5a) wash, using three countercurrent rinsing modes, the passivating solution of workpiece surface is cleaned up；
5b) hot water wash, 50-70 DEG C of temperature；
5c) wash, using three countercurrent rinsing modes, workpiece surface is cleaned up.
It is preferred that, the step 1 of the electrophoretic painting) comprise the following steps,
1A) spray degreasing：Using alkalescent and without P, N Environment-friendlydegreasant degreasant, with reference to spray process carry out degreasing go Dirt, free alkali：10-25pt, temperature：35-45 DEG C, time：160±10Sec；
1B) hot water wash, temperature：45-55 DEG C, time：19±5Sec；
1C) dipping degreasing I：Using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, pass through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：15-25pt, temperature：40-50 DEG C, time：200±10Sec.
1D) wash, using three countercurrent rinsing modes, the degreasing agent of workpiece surface is cleaned up；
1E) dipping degreasing II, using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, passes through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：17-25pt, temperature：50-60 DEG C, time：265±10Sec；
1F) wash, using three countercurrent rinsing modes, and the washing of first second level adds ultrasonic technique, utilizes Ultrasonic wave can remove the degreasing agent remained through degreasing process, moreover it is possible to workpiece crack or welding position is obtained effective cleaning effect Really.
It is preferred that, the step 4 of the electrophoretic painting) comprise the following steps,
4A) wash, using four-stage counter-current rinse method, the water outlet conductivity of afterbody washing controls below 3us/cm, So as to ensure workpiece surface cleannes before electrophoresis；
4B) empty drop, drips in atmosphere, the time：69±5Sec.
It is preferred that, the step 6 of the electrophoretic painting) comprise the following steps,
6A) ultrafiltration is washed, and using ultrafiltration system, electrophoretic paint is obtained effective cleaning；
6B) spray washing, the current scour power of spray washing, is greatly improved the cleaning action of workpiece surface, solves very well Only with soaking and washing is relatively slower or the difficult electrophoretic paint problem washed off.
6C) pure water is washed, and using two countercurrent rinsing modes, workpiece surface is cleaned up.
A kind of electrophoresis tool of engine periphery water pipe, including framework, frame roof are provided with suspender, the lower portion water Flat to set many hanger bars, hanger bar is provided with tip hanger bracket.
Beneficial effect using above technical scheme is：Corrosion resistance height of the present invention and heatproof, the inside are admiro electricity Plating, outside is local black electrophore tic, and water resistance and temperature tolerance and resistance to salt water are all very strong.
Brief description of the drawings
Fig. 1 is the structural representation of electrophoresis tool of the present invention；
Fig. 2 is the side view of electrophoresis tool of the present invention.
Wherein, 1-- frameworks, 2-- suspenders, 3-- hanger bars, 4-- tip hanger brackets.
Embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Fig. 1 and Fig. 2 show the embodiment of the present invention：A kind of electrophoresis tool of engine periphery water pipe, including frame Frame 1, the top of framework 1 is provided with suspender 2, and the inner horizontal of framework 1 sets many hanger bars 3, and hanger bar 3 is hung provided with tip Frame 4.
Embodiment 1, a kind of engine periphery water tube surfaces handling process, including rack plating zinc-nickel and electrophoretic painting；
Rack plating zinc-nickel comprises the following steps,
1) surface preparation, is handled workpiece surface, and the dirt of workpiece surface is cleaned out；
2) rack plating zinc-nickel, plating solution, which is constituted, is：Sodium hydroxide：110g/L、Ni2+7g/L；Ni2+/Ni2+7；Electroplating temperature：19 DEG C, electroplating time 50min, voltage：5V；
3) wash, remove the plating solution of workpiece surface residual；
4) blueness passivation：Passivating solution pH value：4.2, temperature：20 DEG C, time：150S, the one layer of cause of Zinc-Nickel coating layer Surface Creation Close chemical composition coating；
5) wash, remove the passivating solution of workpiece surface residual；
6) dry, temperature：60 DEG C, time：45min；
Electrophoretic painting comprises the following steps,
1) surface degreasing, ungrease treatment is carried out to workpiece surface, greasy dirt is departed from workpiece surface, deoiling；
2) table is adjusted, and using zinc salt pre-treatment surface conditioner, changes microstate, the activation workpiece surface of metal surface, SURFFINEGL：1.0g/L, time：64S；
3) phosphatization, total acidity：16, free acidity：1.1, temperature：35 DEG C, Toner values：2.0, time：255S, in workpiece One layer of Surface Creation has the phosphate coating of corrosion resistance and alkali resistance；
4) wash, remove the phosphatization acid solution of workpiece surface residual；
5) black electrophore tic, conductive workpiece is immersed in electrophoretic coating groove as negative electrode, logical straight in two interpolars Stream electricity, separates out uniform, water-insoluble black coating, solid part on workpiece：19%, temperature：28 DEG C, time：240Sec, electricity Pressure：150V；
6) wash, remove the electrophoretic coating of workpiece surface residual；
7) dry, temperature：170 DEG C, time：2410Sec.
The step 1 of rack plating zinc-nickel) comprise the following steps,
1a) electrochemical deoiling, oil removing twice, temperature are at least carried out using degreaser：50 DEG C, time：10min；
Workpiece, is done anode by 1b) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：50 DEG C, time：10min, voltage：4V；
1c) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1d) ultrasonic oil removal, using special ultrasonic oil removal agent, the bubble and degreaser produced using ultrasonic wave is dual Effect, cleans up workpiece surface greasy dirt, temperature：50 DEG C, time：5min；Flexible electrochemical deoiling agent, oil removing ability is strong, To various metals almost free from corrosion degreaser
Workpiece, is done anode by 1e) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：50 DEG C, time：10min, voltage：4V；
1f) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1g) activate, the clear low-level oxidation film of workpiece surface is removed using low-concentration hcl, the time：1min；
1h) wash, using duplex countercurrent rinsing mode, the hydrochloric acid of workpiece surface is cleaned up.
Step 3 in rack plating zinc-nickel) comprise the following steps,
Washing 3a) is exchanged, exchange washing efficiently avoid product and be oxidized on the move, protect coating；
3b) wash, using duplex countercurrent rinsing mode, the plating solution of workpiece surface is cleaned up；
3c) ultrasonic wave water washing, the medicament of process residual before being removed using ultrasonic wave, moreover it is possible to make workpiece crack or welding Position obtains effective cleaning；
3d) neutralize, utilize sour further cleaning coating surface, time：5S, hydrochloric acid adds a certain amount of sour accelerator；
3e) wash, using duplex countercurrent rinsing mode, the acid solution of workpiece surface is cleaned up.
It is preferred that, the step 5 in the rack plating zinc-nickel) comprise the following steps,
5a) wash, using three countercurrent rinsing modes, the passivating solution of workpiece surface is cleaned up；
5b) hot water wash, temperature 50 C；
5c) wash, using three countercurrent rinsing modes, workpiece surface is cleaned up.
The step 1 of electrophoretic painting) comprise the following steps,
1A) spray degreasing：Using alkalescent and without P, N Environment-friendlydegreasant degreasant, with reference to spray process carry out degreasing go Dirt, free alkali：10pt, temperature：35 DEG C, time：170Sec；
1B) hot water wash, temperature：45 DEG C, time：24Sec；
1C) dipping degreasing I：Using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, pass through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：15pt, temperature：40 DEG C, time：210Sec.
1D) wash, using three countercurrent rinsing modes, the degreasing agent of workpiece surface is cleaned up；
1E) dipping degreasing II, using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, passes through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：17pt, temperature：50 DEG C, time：275Sec；
1F) wash, using three countercurrent rinsing modes, and the washing of first second level adds ultrasonic technique, utilizes Ultrasonic wave can remove the degreasing agent remained through degreasing process, moreover it is possible to workpiece crack or welding position is obtained effective cleaning effect Really.
The step 4 of electrophoretic painting) comprise the following steps,
4A) wash, using four-stage counter-current rinse method, the water outlet conductivity of afterbody washing controls below 3us/cm, So as to ensure workpiece surface cleannes before electrophoresis；
4B) empty drop, drips in atmosphere, the time：69±5Sec.
The step 6 of electrophoretic painting) comprise the following steps,
6A) ultrafiltration is washed, and using ultrafiltration system, electrophoretic paint is obtained effective cleaning；
6B) spray washing, the current scour power of spray washing, is greatly improved the cleaning action of workpiece surface, solves very well Only with soaking and washing is relatively slower or the difficult electrophoretic paint problem washed off.
6C) pure water is washed, and using two countercurrent rinsing modes, workpiece surface is cleaned up.
Passivating solution is a kind of color passivation solution, is the chromatic passivation technology from Europe；Degreaser and special ultrasonic wave Degreaser is that Japanese ippon company provides, and oil removing ability is strong, to a kind of oil removing medicament of the product surface without any corrosion.
Embodiment 2
A kind of engine periphery water tube surfaces handling process, including rack plating zinc-nickel and electrophoretic painting；
Rack plating zinc-nickel comprises the following steps,
1) surface preparation, is handled workpiece surface, and the dirt of workpiece surface is cleaned out；
2) rack plating zinc-nickel, plating solution, which is constituted, is：Sodium hydroxide：120g/L、Ni2+6.5g/L；Ni2+/Ni2+5.5；Electroplating temperature： 20 DEG C, electroplating time 40min, voltage：4V；
3) wash, remove the plating solution of workpiece surface residual；
4) blueness passivation：Passivating solution pH value：4.5, temperature：30 DEG C, time：120S, the one layer of cause of Zinc-Nickel coating layer Surface Creation Close chemical composition coating；
5) wash, remove the passivating solution of workpiece surface residual；
6) dry, temperature：80 DEG C, time：35min；
Electrophoretic painting comprises the following steps,
1) surface degreasing, ungrease treatment is carried out to workpiece surface, greasy dirt is departed from workpiece surface, deoiling；
2) table is adjusted, and using zinc salt pre-treatment surface conditioner, changes microstate, the activation workpiece surface of metal surface, SURFFINEGL：2.0g/L, time：69S；
3) phosphatization, total acidity：20, free acidity：0.9, temperature：40 DEG C, Toner values：1.6, time：265S, in workpiece One layer of Surface Creation has the phosphate coating of corrosion resistance and alkali resistance；
4) wash, remove the phosphatization acid solution of workpiece surface residual；
5) black electrophore tic, conductive workpiece is immersed in electrophoretic coating groove as negative electrode, logical straight in two interpolars Stream electricity, separates out uniform, water-insoluble black coating, solid part on workpiece：20%, temperature：30 DEG C, time：230Sec, electricity Pressure：160V；
6) wash, remove the electrophoretic coating of workpiece surface residual；
7) dry, temperature：180 DEG C, time：2400Sec.
The step 1 of rack plating zinc-nickel) comprise the following steps,
1a) electrochemical deoiling, oil removing twice, temperature are at least carried out using degreaser：60 DEG C, time：8min；
Workpiece, is done anode by 1b) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：60 DEG C, time：8min, voltage：5V；
1c) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1d) ultrasonic oil removal, using special ultrasonic oil removal agent, the bubble and degreaser produced using ultrasonic wave is dual Effect, cleans up workpiece surface greasy dirt, temperature：60 DEG C, time：4min；
Workpiece, is done anode by 1e) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：60 DEG C, time：8min, voltage：5V；
1f) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1g) activate, the clear low-level oxidation film of workpiece surface is removed using low-concentration hcl, the time：2min；
1h) wash, using duplex countercurrent rinsing mode, the hydrochloric acid of workpiece surface is cleaned up.
Step 3 in rack plating zinc-nickel) comprise the following steps,
Washing 3a) is exchanged, exchange washing efficiently avoid product and be oxidized on the move, protect coating；
3b) wash, using duplex countercurrent rinsing mode, the plating solution of workpiece surface is cleaned up；
3c) ultrasonic wave water washing, the medicament of process residual before being removed using ultrasonic wave, moreover it is possible to make workpiece crack or welding Position obtains effective cleaning；
3d) neutralize, utilize sour further cleaning coating surface, time：8S；
3e) wash, using duplex countercurrent rinsing mode, the acid solution of workpiece surface is cleaned up.
It is preferred that, the step 5 in the rack plating zinc-nickel) comprise the following steps,
5a) wash, using three countercurrent rinsing modes, the passivating solution of workpiece surface is cleaned up；
5b) hot water wash, temperature 60 C；
5c) wash, using three countercurrent rinsing modes, workpiece surface is cleaned up.
The step 1 of electrophoretic painting) comprise the following steps,
1A) spray degreasing：Using alkalescent and without P, N Environment-friendlydegreasant degreasant, with reference to spray process carry out degreasing go Dirt, free alkali：18pt, temperature：40 DEG C, time：160Sec；
1B) hot water wash, temperature：50 DEG C, time：19Sec；
1C) dipping degreasing I：Using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, pass through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：20pt, temperature：45 DEG C, time：200Sec.
1D) wash, using three countercurrent rinsing modes, the degreasing agent of workpiece surface is cleaned up；
1E) dipping degreasing II, using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, passes through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：21pt, temperature：55 DEG C, time：265Sec；
1F) wash, using three countercurrent rinsing modes, and the washing of first second level adds ultrasonic technique, utilizes Ultrasonic wave can remove the degreasing agent remained through degreasing process, moreover it is possible to workpiece crack or welding position is obtained effective cleaning effect Really.
The step 4 of electrophoretic painting) comprise the following steps,
4A) wash, using four-stage counter-current rinse method, the water outlet conductivity of afterbody washing controls below 3us/cm, So as to ensure workpiece surface cleannes before electrophoresis；
4B) empty drop, drips in atmosphere, the time：69±5Sec.
The step 6 of electrophoretic painting) comprise the following steps,
6A) ultrafiltration is washed, and using ultrafiltration system, electrophoretic paint is obtained effective cleaning；
6B) spray washing, the current scour power of spray washing, is greatly improved the cleaning action of workpiece surface, solves very well Only with soaking and washing is relatively slower or the difficult electrophoretic paint problem washed off.
6C) pure water is washed, and using two countercurrent rinsing modes, workpiece surface is cleaned up.
Embodiment 3
A kind of engine periphery water tube surfaces handling process, including rack plating zinc-nickel and electrophoretic painting；
Rack plating zinc-nickel comprises the following steps,
1) surface preparation, is handled workpiece surface, and the dirt of workpiece surface is cleaned out；
2) rack plating zinc-nickel, plating solution, which is constituted, is：Sodium hydroxide：130g/L、Ni2+6g/L；Ni2+/Ni2+7；Electroplating temperature：22 DEG C, electroplating time 30min, voltage：5V；
3) wash, remove the plating solution of workpiece surface residual；
4) blueness passivation：Passivating solution pH value：4.8, temperature：40 DEG C, time：90S, the one layer of densification of Zinc-Nickel coating layer Surface Creation Chemical composition coating；
5) wash, remove the passivating solution of workpiece surface residual；
6) dry, temperature：100 DEG C, time：25min；
Electrophoretic painting comprises the following steps,
1) surface degreasing, ungrease treatment is carried out to workpiece surface, greasy dirt is departed from workpiece surface, deoiling；
2) table is adjusted, and using zinc salt pre-treatment surface conditioner, changes microstate, the activation workpiece surface of metal surface, SURFFINEGL：3.0g/L, time：74S；
3) phosphatization, total acidity：25, free acidity：1.1, temperature：35 DEG C, Toner values：1.2-2.0, time：255S, Workpiece surface generates one layer of phosphate coating with corrosion resistance and alkali resistance；
4) wash, remove the phosphatization acid solution of workpiece surface residual；
5) black electrophore tic, conductive workpiece is immersed in electrophoretic coating groove as negative electrode, logical straight in two interpolars Stream electricity, separates out uniform, water-insoluble black coating, solid part on workpiece：21%, temperature：232 DEG C, time：220Sec, electricity Pressure：170V；
6) wash, remove the electrophoretic coating of workpiece surface residual；
7) dry, temperature：190 DEG C, time：2390Sec.
The step 1 of rack plating zinc-nickel) comprise the following steps,
1a) electrochemical deoiling, oil removing twice, temperature are at least carried out using degreaser：70 DEG C, time：5min；
Workpiece, is done anode by 1b) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：70 DEG C, time：5min, voltage：6V；
1c) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1d) ultrasonic oil removal, using special ultrasonic oil removal agent, the bubble and degreaser produced using ultrasonic wave is dual Effect, cleans up workpiece surface greasy dirt, temperature：70 DEG C, time：3min；
Workpiece, is done anode by 1e) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece Other dirts of greasy dirt and workpiece surface attachment on surface are cleaned out, temperature：70 DEG C, time：5min, voltage：6V；
1f) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1g) activate, the clear low-level oxidation film of workpiece surface is removed using low-concentration hcl, the time：3min；
1h) wash, using duplex countercurrent rinsing mode, the hydrochloric acid of workpiece surface is cleaned up.
Step 3 in rack plating zinc-nickel) comprise the following steps,
Washing 3a) is exchanged, exchange washing efficiently avoid product and be oxidized on the move, protect coating；
3b) wash, using duplex countercurrent rinsing mode, the plating solution of workpiece surface is cleaned up；
3c) ultrasonic wave water washing, the medicament of process residual before being removed using ultrasonic wave, moreover it is possible to make workpiece crack or welding Position obtains effective cleaning；
3d) neutralize, utilize sour further cleaning coating surface, time：15S；
3e) wash, using duplex countercurrent rinsing mode, the acid solution of workpiece surface is cleaned up.
It is preferred that, the step 5 in the rack plating zinc-nickel) comprise the following steps,
5a) wash, using three countercurrent rinsing modes, the passivating solution of workpiece surface is cleaned up；
5b) hot water wash, temperature 70 C；
5c) wash, using three countercurrent rinsing modes, workpiece surface is cleaned up.
The step 1 of electrophoretic painting) comprise the following steps,
1A) spray degreasing：Using alkalescent and without P, N Environment-friendlydegreasant degreasant, with reference to spray process carry out degreasing go Dirt, free alkali：25pt, temperature：45 DEG C, time：170Sec；
1B) hot water wash, temperature：55 DEG C, time：14Sec；
1C) dipping degreasing I：Using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, pass through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：25pt, temperature：50 DEG C, time：190Sec.
1D) wash, using three countercurrent rinsing modes, the degreasing agent of workpiece surface is cleaned up；
1E) dipping degreasing II, using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, passes through soap Change, emulsion reaction, make greasy dirt depart from workpiece surface, free alkali：25pt, temperature：60 DEG C, time：255Sec；
1F) wash, using three countercurrent rinsing modes, and the washing of first second level adds ultrasonic technique, utilizes Ultrasonic wave can remove the degreasing agent remained through degreasing process, moreover it is possible to workpiece crack or welding position is obtained effective cleaning effect Really.
The step 4 of electrophoretic painting) comprise the following steps,
4A) wash, using four-stage counter-current rinse method, the water outlet conductivity of afterbody washing controls below 3us/cm, So as to ensure workpiece surface cleannes before electrophoresis；
4B) empty drop, drips in atmosphere, the time：69±5Sec.
The step 6 of electrophoretic painting) comprise the following steps,
6A) ultrafiltration is washed, and using ultrafiltration system, electrophoretic paint is obtained effective cleaning；
6B) spray washing, the current scour power of spray washing, is greatly improved the cleaning action of workpiece surface, solves very well Only with soaking and washing is relatively slower or the difficult electrophoretic paint problem washed off.
6C) pure water is washed, and using two countercurrent rinsing modes, workpiece surface is cleaned up.
Above-described is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention Protection domain.

Claims (8)

1. a kind of engine periphery water tube surfaces handling process, it is characterised in that including rack plating zinc-nickel and electrophoretic painting；
Rack plating zinc-nickel comprises the following steps,
1) surface preparation, is handled workpiece surface, and the dirt of workpiece surface is cleaned out；
2) rack plating zinc-nickel, plating solution, which is constituted, is：Sodium hydroxide：110-130g/L、Ni2+6-7g/L；Ni2+/Ni2+4-7；Electroplating temperature： 19-22 DEG C, electroplating time 30-50min, voltage：3-5V；
3) wash, remove the plating solution of workpiece surface residual；
4) blueness passivation：Passivating solution pH value：4.2-4.8, temperature：20-40 DEG C, time：90-150S, Zinc-Nickel coating layer Surface Creation One layer of fine and close chemical composition coating；
5) wash, remove the passivating solution of workpiece surface residual；
6) dry, temperature：60-100 DEG C, time：25-45min；
Electrophoretic painting comprises the following steps,
1) surface degreasing, ungrease treatment is carried out to workpiece surface, greasy dirt is departed from workpiece surface, deoiling；
2) table is adjusted, and using zinc salt pre-treatment surface conditioner, changes microstate, the activation workpiece surface of metal surface, SURFFINEGL：1.0-3.0g/L, time：69±5S；
3) phosphatization, total acidity：16-25, free acidity：0.7-1.1, temperature：35-45 DEG C, Toner values：1.2-2.0, time： 265 ± 10S, one layer of phosphate coating with corrosion resistance and alkali resistance is generated in workpiece surface；
4) wash, remove the phosphatization acid solution of workpiece surface residual；
5) black electrophore tic, conductive workpiece is immersed in electrophoretic coating groove as negative electrode, leads to direct current in two interpolars, Uniform, water-insoluble black coating, solid part are separated out on workpiece：19-21%, temperature：28-32 DEG C, time：230± 10Sec, voltage：160V±10V；
6) wash, remove the electrophoretic coating of workpiece surface residual；
7) dry, temperature：170-190 DEG C, time：2400±10Sec.
2. engine periphery water tube surfaces handling process according to claim 1, it is characterised in that the rack plating zinc-nickel Step 1) comprise the following steps,
1a) electrochemical deoiling, oil removing twice, temperature are at least carried out using degreaser：50-70 DEG C, time：5-10min；
Workpiece, is done anode by 1b) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece surface On greasy dirt and workpiece surface attachment other dirts clean out, temperature：50-70 DEG C, time：5-10min, voltage：4-6V；
1c) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1d) ultrasonic oil removal, using special ultrasonic oil removal agent, the dual work of bubble and degreaser produced using ultrasonic wave With workpiece surface greasy dirt being cleaned up, temperature：50-70 DEG C, time：3-5min；
Workpiece, is done anode by 1e) electrolytic degreasing, using special model machine electrolytic degreasing agent, workpiece is processed, workpiece surface On greasy dirt and workpiece surface attachment other dirts clean out, temperature：50-70 DEG C, time：5-10min, voltage：4-6V；
1f) wash, using three countercurrent rinsing modes, the electrolytic degreasing agent of workpiece surface is cleaned up；
1g) activate, the clear low-level oxidation film of workpiece surface is removed using low-concentration hcl, the time：1-3min；
1h) wash, using duplex countercurrent rinsing mode, the hydrochloric acid of workpiece surface is cleaned up.
3. engine periphery water tube surfaces handling process according to claim 1, it is characterised in that in the rack plating zinc-nickel Step 3) comprise the following steps,
Washing 3a) is exchanged, exchange washing efficiently avoid product and be oxidized on the move, protect coating；
3b) wash, using duplex countercurrent rinsing mode, the plating solution of workpiece surface is cleaned up；
3c) ultrasonic wave water washing, the medicament of process residual before being removed using ultrasonic wave, moreover it is possible to make workpiece crack or welding position Obtain effective cleaning；
3d) neutralize, utilize sour further cleaning coating surface, time：5-15S；
3e) wash, using duplex countercurrent rinsing mode, the acid solution of workpiece surface is cleaned up.
4. engine periphery water tube surfaces handling process according to claim 1, it is characterised in that in the rack plating zinc-nickel Step 5) comprise the following steps,
5a) wash, using three countercurrent rinsing modes, the passivating solution of workpiece surface is cleaned up；
5b) hot water wash, 50-70 DEG C of temperature；
5c) wash, using three countercurrent rinsing modes, workpiece surface is cleaned up.
5. engine periphery water tube surfaces handling process according to claim 1, it is characterised in that the electrophoretic painting Step 1) comprise the following steps,
1A) spray degreasing：Using alkalescent and without P, N Environment-friendlydegreasant degreasant, with reference to spray process carry out degreasing decontamination, trip From alkali：10-25pt, temperature：35-45 DEG C, time：160±10Sec；
1B) hot water wash, temperature：45-55 DEG C, time：19±5Sec；
1C) dipping degreasing I：Using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, pass through saponification, breast Change reaction, greasy dirt is departed from workpiece surface, free alkali：15-25pt, temperature：40-50 DEG C, time：200±10Sec.
1D) wash, using three countercurrent rinsing modes, the degreasing agent of workpiece surface is cleaned up；
1E) dipping degreasing II, using alkalescent degreasing agent, with reference to impregnation technology, in a certain temperature conditions, by saponification, Emulsion reaction, makes greasy dirt depart from workpiece surface, free alkali：17-25pt, temperature：50-60 DEG C, time：265±10Sec；
1F) wash, using three countercurrent rinsing modes, and the washing of first second level adds ultrasonic technique, utilizes ultrasound Ripple can remove the degreasing agent remained through degreasing process, moreover it is possible to workpiece crack or welding position is obtained effective cleaning effect.
6. engine periphery water tube surfaces handling process according to claim 1, it is characterised in that the electrophoretic painting Step 4) comprise the following steps,
4A) wash, using four-stage counter-current rinse method, the water outlet conductivity of afterbody washing controls below 3us/cm, so that Ensure workpiece surface cleannes before electrophoresis；
4B) empty drop, drips in atmosphere, the time：69±5Sec.
7. engine periphery water tube surfaces handling process according to claim 1, it is characterised in that the electrophoretic painting Step 6) comprise the following steps,
6A) ultrafiltration is washed, and using ultrafiltration system, electrophoretic paint is obtained effective cleaning；
6B) spray washing, the current scour power of spray washing, is greatly improved the cleaning action of workpiece surface, solves very well only With soaking and washing is relatively slow or the difficult electrophoretic paint problem washed off.
6C) pure water is washed, and using two countercurrent rinsing modes, workpiece surface is cleaned up.
8. the electrophoresis tool of a kind of engine periphery water pipe, it is characterised in that including framework, frame roof is provided with suspender, described Lower portion is horizontally disposed with many hanger bars, and hanger bar is provided with tip hanger bracket.
CN201710470339.1A 2017-06-20 2017-06-20 A kind of engine periphery water tube surfaces handling process and its electrophoresis tool Pending CN107034501A (en)

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