CN114016102A - Surface treatment process for standard part - Google Patents
Surface treatment process for standard part Download PDFInfo
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- CN114016102A CN114016102A CN202111482651.5A CN202111482651A CN114016102A CN 114016102 A CN114016102 A CN 114016102A CN 202111482651 A CN202111482651 A CN 202111482651A CN 114016102 A CN114016102 A CN 114016102A
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000004381 surface treatment Methods 0.000 title claims abstract description 37
- 238000009713 electroplating Methods 0.000 claims abstract description 59
- 238000003618 dip coating Methods 0.000 claims abstract description 47
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims abstract description 29
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 25
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract description 23
- 238000005868 electrolysis reaction Methods 0.000 claims description 72
- 238000005406 washing Methods 0.000 claims description 52
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 34
- 239000000843 powder Substances 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 28
- 239000002253 acid Substances 0.000 claims description 27
- 238000005238 degreasing Methods 0.000 claims description 25
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 19
- 238000001994 activation Methods 0.000 claims description 18
- 230000004913 activation Effects 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 17
- 239000003792 electrolyte Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 11
- 238000007598 dipping method Methods 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- YODZTKMDCQEPHD-UHFFFAOYSA-N thiodiglycol Chemical compound OCCSCCO YODZTKMDCQEPHD-UHFFFAOYSA-N 0.000 claims description 10
- 229950006389 thiodiglycol Drugs 0.000 claims description 10
- 229920006217 cellulose acetate butyrate Polymers 0.000 claims description 9
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 8
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 8
- 230000003213 activating effect Effects 0.000 claims description 8
- 229910001453 nickel ion Inorganic materials 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 239000003995 emulsifying agent Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 4
- 238000005282 brightening Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims 2
- 239000010410 layer Substances 0.000 abstract description 48
- 239000002131 composite material Substances 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002344 surface layer Substances 0.000 abstract description 5
- 238000011068 loading method Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 12
- 239000007921 spray Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 4
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- -1 polyoxyethylene Polymers 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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Classifications
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- 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
- B05D3/002—Pretreatement
-
- 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
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention provides a surface treatment process of a standard part, which comprises the steps of firstly preparing a zinc-nickel alloy layer by adopting an electroplating method, then preparing a zinc-aluminum coating by adopting a dip-coating method, and loading a double-layer composite layer on the surface layer of the standard part; the double-layer composite layer prepared by the surface treatment process greatly enhances the anti-corrosion effect; meanwhile, the thickness of the double-layer composite layer is larger than or equal to 18 microns, the problem of insufficient assembly precision can be solved, and the effects of fastening and noise reduction are realized.
Description
Technical Field
The invention belongs to the technical field of automobile corrosion prevention, and particularly relates to a surface treatment process of a standard component.
Background
With the rapid development of the automobile industry, the quality requirements of consumers on automobile products are more and more strict, and the automobile products are required to have fashionable and attractive appearance, excellent safety performance, excellent driving feeling and durable product. The automobile consists of tens of thousands of parts, wherein a metal standard part is exposed in the air, and under the combined action of moisture, heat and external force, the metal standard part is oxidized, corroded, even broken, so that the appearance is seriously influenced, huge hidden dangers are brought to the safe running of the automobile, the service life of the automobile is seriously influenced, and environmental pollution and material waste are brought. In order to slow down the oxidation and corrosion of the metal standard part, the surface protection treatment of the metal standard part is indispensable, and the surface protection treatment can effectively prolong the time of oxidation and corrosion of the metal standard part.
At present, the types of standard parts designed for a whole vehicle are about 500, wherein the types of standard parts needing surface treatment are about 200-300, and the corrosion prevention requirements of the standard parts of the vehicle can be basically met mainly by zinc plating, oxidation, zinc nickel plating and Dacromet treatment, but the surface treatment requirements of the standard parts partially highly visible or highly influencing the sensory evaluation of customers are difficult to completely meet.
CN111074313A discloses a wheel bolt electroplating process, which comprises the following process steps: hot degreasing, primary washing, pre-plating, secondary washing, electroplating, tertiary washing, brightening, fourth washing, passivation, fifth washing, hot washing and drying; the surface quality and the salt spray test of the product electroplated after shot blasting and the product electroplated after acid washing are the same, the shot blasting product does not need acid washing, the hydrogen embrittlement risk is reduced, the shot blasting only replaces one acid washing process, neutralization and dehydrogenation after acid washing are not needed, the production cost can be consumed by treating waste acid generated by acid washing, the problem of the shot blasting is solved, the product quality is improved, and the production cost is reduced.
CN112267135A discloses a zinc-nickel alloy electroplating process for a shell of a vacuum brake booster of a new energy automobile, wherein a zinc-nickel layer is firmly combined and corrosion is not easy to generate. The method comprises the following steps: the method comprises the steps of oil removal, rust removal, electroplating, passivation and drying. The workpiece is not easy to rust and the surface treatment is carried out by adopting a plurality of steps, so that the binding force between the coating and the workpiece is enhanced, and the coating has strong binding force and is not easy to fall off. However, the plating thickness of the electroplating process is limited, and coatings with excessive thickness are easy to fall off.
Therefore, it is necessary to develop a new surface treatment process for a standard component, which can increase the corrosion resistance effect and the thickness of the surface layer while loading a double-layer composite layer on the surface layer of the standard component.
Disclosure of Invention
The invention aims to provide a surface treatment process of a standard component, which comprises the steps of firstly preparing a zinc-nickel alloy layer by adopting an electroplating method, and then preparing a zinc-aluminum coating by adopting a dip coating method; the surface layer of the standard component is loaded with a double-layer composite layer, the corrosion resistance is greatly enhanced, and meanwhile, the thickness of the composite layer is more than or equal to 18 microns, so that the problem of insufficient assembly precision can be solved, and the effects of fastening and noise reduction are realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention aims to provide a surface treatment process of a standard component, which comprises the steps of preparing a zinc-nickel alloy layer by adopting an electroplating method and preparing a zinc-aluminum coating by adopting a dip coating method.
According to the invention, the double-layer composite layer is loaded on the surface layer of the standard component, so that the anti-corrosion effect is greatly enhanced, meanwhile, the thickness of the composite layer is increased, the problem of insufficient assembly precision can be made up, and the effects of fastening and noise reduction are realized.
As a preferable technical scheme of the invention, the electroplating method comprises the steps of degreasing, anode electrolysis, activation, zinc-nickel alloy layer electroplating and bright dipping which are sequentially carried out.
Preferably, the oil removal adopts oil removal liquid containing oil removal powder.
Preferably, the degreasing fluid has a degreasing powder content of 60-80g/L, such as 60g/L, 62g/L, 64g/L, 65g/L, 66g/L, 68g/L, 70g/L, 72g/L, 74g/L, 75g/L, 76g/L, 78g/L, 80g/L, etc., but not limited to the enumerated values, and other values within the above-mentioned range of values are also applicable.
Preferably, the type of the oil removing powder is SF 301.
Preferably, the degreasing temperature is 70-80 ℃, for example 70 ℃, 71 ℃, 72 ℃, 73 ℃, 74 ℃, 75 ℃, 76 ℃, 77 ℃, 78 ℃, 79 ℃, 80 ℃ and the like, but not limited to the recited values, and other values not recited in the above numerical range are also applicable.
Preferably, the degreasing time is 15-20min, such as 15min, 15.5min, 16min, 16.5min, 17min, 17.5min, 18min, 18.5min, 19min, 19.5min, 20min, etc., but not limited to the enumerated values, and other unrecited values within the above numerical range are also applicable.
Preferably, after the degreasing, the anode is cleaned before electrolysis.
Preferably, the washing includes hot water washing and cold water washing which are sequentially performed.
Preferably, the hot water washing temperature is 80-100 ℃, for example, 80 ℃, 81 ℃, 82 ℃, 83 ℃, 84 ℃, 85 ℃, 86 ℃, 87 ℃, 88 ℃, 89 ℃, 90 ℃, 91 ℃, 92 ℃, 93 ℃, 94 ℃, 95 ℃, 96 ℃, 97 ℃, 98 ℃, 99 ℃, 100 ℃ and the like, but is not limited to the recited values, and other values not recited in the above numerical range are also applicable.
Preferably, the hot water washing time is 5 to 10 seconds, and may be, for example, 5s, 5.5s, 6s, 6.5s, 7s, 7.5s, 8s, 8.5s, 9s, 9.5s, 10s, etc., but is not limited to the enumerated values, and other values not enumerated within the above-mentioned numerical range are also applicable.
Preferably, the cold water washing temperature is 0-20 ℃, and may be, for example, 0 ℃, 2 ℃, 4 ℃, 5 ℃, 6 ℃, 8 ℃, 10 ℃, 12 ℃, 14 ℃, 15 ℃, 16 ℃, 18 ℃, 20 ℃, etc., but is not limited to the recited values, and other values not recited in the above numerical range are also applicable.
Preferably, the time for the cold water washing is 5 to 10 seconds, and may be, for example, 5s, 5.5s, 6s, 6.5s, 7s, 7.5s, 8s, 8.5s, 9s, 9.5s, 10s, etc., but is not limited to the enumerated values, and other values not enumerated within the above-mentioned numerical range are also applicable.
As a preferable technical scheme of the invention, the anodic electrolysis comprises primary anodic electrolysis, acid washing and secondary anodic electrolysis which are sequentially carried out.
Preferably, the primary anode electrolysis and the secondary anode electrolysis both adopt electrolyte containing electric stripping oil powder.
Preferably, the electrolytic oil removal powder content of the electrolyte in the primary anolyte and the secondary anolyte is 120-130g/L, such as 120g/L, 121g/L, 122g/L, 123g/L, 124g/L, 125g/L, 126g/L, 127g/L, 128g/L, 129g/L, 130g/L, etc., but not limited to the enumerated values, and other unrecited values within the above numerical range are also applicable.
Preferably, the types of the electric release oil powder of the electrolyte in the primary anode electrolysis and the secondary anode electrolysis are both SF 303A.
Preferably, the temperature of the primary anolyte and the secondary anolyte is 40-50 ℃, for example 40 ℃, 41 ℃, 42 ℃, 43 ℃, 44 ℃, 45 ℃, 46 ℃, 47 ℃, 48 ℃, 49 ℃, 50 ℃ and the like, but is not limited to the recited values, and other values not recited in the above numerical range are also applicable.
Preferably, the time of the first anodic electrolysis and the time of the second anodic electrolysis are both 3-5min, such as 3min, 3.2min, 3.4min, 3.6min, 3.8min, 4min, 4.2min, 4.4min, 4.6min, 4.8min, 5min, etc., but not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
Preferably, the current density of the primary anodic electrolysis and the current density of the secondary anodic electrolysis are both 2-5A/dm2For example, it may be 2A/dm2，2.2A/dm2，2.5A/dm2，2.8A/dm2，3A/dm2，3.3A/dm2，3.5A/dm2，3.7A/dm2，4A/dm2，4.2A/dm2，4.5A/dm2，4.8A/dm2，5A/dm2And the like, but are not limited to the recited numerical values, and other numerical values not recited in the above numerical ranges are also applicable.
Preferably, the pickling solution used for pickling includes hydrochloric acid with a concentration of 30 to 40 wt%, such as 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, etc., but is not limited to the recited values, and other values not recited in the above range are also applicable.
Preferably, the acid washing temperature is 20-30 deg.C, such as 20 deg.C, 21 deg.C, 22 deg.C, 23 deg.C, 24 deg.C, 25 deg.C, 26 deg.C, 27 deg.C, 28 deg.C, 29 deg.C, 30 deg.C, etc., but it is not limited to the values listed, and other values not listed in the above range are also applicable.
Preferably, the time for the acid washing is 3-5min, such as 3min, 3.2min, 3.4min, 3.6min, 3.8min, 4min, 4.2min, 4.4min, 4.6min, 4.8min, 5min, etc., but is not limited to the recited values, and other values not recited in the above numerical range are also applicable.
As a preferable technical scheme of the invention, the activating solution used for the activation comprises hydrochloric acid.
Preferably, the concentration of hydrochloric acid in the activation solution is 20-30%, for example, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, etc., but is not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the activation time is 30-50s, such as 30s, 32s, 34s, 36s, 38s, 40s, 42s, 44s, 46s, 48s, 50s, etc., but not limited to the recited values, and other values not recited within the above range of values are equally applicable.
Preferably, the activation temperature is 20-30 ℃, such as 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃, 30 ℃ and the like, but not limited to the recited values, and other values not recited in the above numerical range are also applicable.
As a preferred technical solution of the present invention, the electroplating of the zinc-nickel alloy layer includes a pre-dipping and an electroplating performed in sequence.
Preferably, the pre-dip used for the pre-dip includes a sodium hydroxide solution with a content of 20-40g/L, such as 20g/L, 22g/L, 24g/L, 25g/L, 26g/L, 28g/L, 30g/L, 32g/L, 34g/L, 35g/L, 36g/L, 38g/L, 40g/L, etc., but is not limited to the recited values, and other values not recited in the above range of values are equally applicable.
Preferably, the pre-soaking time is 10-30s, and may be, for example, 10s, 12s, 14s, 16s, 18s, 20s, 22s, 24s, 26s, 28s, 30s, etc., but is not limited to the enumerated values, and other unrecited values within the above-mentioned range of values are also applicable.
Preferably, the temperature of the prepreg is 20 to 30 ℃, and may be, for example, 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃, 30 ℃, etc., but is not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, in the electroplating, the standard acts as a cathode.
Preferably, the electroplating solution employed for the electroplating comprises an alkaline zinc-nickel electroplating solution.
Preferably, the content of NaOH in the electroplating solution is 120-150g/L, such as 120g/L, 122g/L, 124g/L, 126g/L, 128g/L, 130g/L, 132g/L, 134g/L, 136g/L, 138g/L, 140g/L, 142g/L, 144g/L, 146g/L, 148g/L, 150g/L, etc., but not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
Preferably, the zinc ion content of the plating solution is 6-10g/L, for example, 6g/L, 6.5g/L, 7g/L, 7.5g/L, 8g/L, 8.5g/L, 9g/L, 9.5g/L, 10g/L, etc., but not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
Preferably, the amount of nickel ions in the plating solution is 0.6-1g/L, for example, 0.6g/L, 0.65g/L, 0.7g/L, 0.75g/L, 0.8g/L, 0.85g/L, 0.9g/L, 0.95g/L, 1g/L, etc., but is not limited to the recited values, and other values not recited within the above-mentioned range of values are also applicable.
Preferably, the electroplating time is 7-10min, such as 7min, 7.2min, 7.5min, 7.8min, 8min, 8.3min, 8.5min, 8.7min, 9min, 9.2min, 9.5min, 9.8min, 10min, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
In a preferred embodiment of the present invention, the light-emitting agent for light emission comprises a citric acid solution having a pH of 3 to 4, and examples thereof include 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, and 4, but the present invention is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
Preferably, the light emitting time is 30-60s, and may be, for example, 30s, 33s, 35s, 38s, 40s, 42s, 45s, 47s, 50s, 52s, 55s, 58s, 60s, etc., but is not limited to the enumerated values, and other non-enumerated values in the above numerical range are also applicable.
Preferably, the light extraction temperature is 20-30 ℃, such as 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃, 30 ℃ and the like, but not limited to the recited values, and other values not recited in the above range of values are also applicable.
As a preferred technical scheme of the invention, the water washing is carried out after the primary anodic electrolysis, the acid washing, the secondary anodic electrolysis, the activation, the electroplating and the bright dipping.
Preferably, the washing time is 2-6min, such as 2min, 2.5min, 3min, 3.5min, 4min, 4.5min, 5min, 5.5min, 6min, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the temperature of the water washing is 20-30 ℃, such as 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃, 30 ℃ and the like, but not limited to the recited values, and other values not recited in the above numerical range are also applicable.
As a preferable technical scheme of the invention, the dip coating method comprises the steps of dip coating of a zinc-aluminum coating, spin drying, pre-drying and baking solidification which are sequentially carried out.
Preferably, the dip coating solution used for dip coating the zinc-aluminum coating comprises zinc powder, aluminum powder, thiodiglycol, cellulose acetate butyrate, an emulsifier, a dispersant, ethanol and deionized water.
Preferably, the dip-coating solution comprises 25 to 45 wt% zinc powder, for example, may be 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, 31 wt%, 32 wt%, 33 wt%, 34 wt%, 35 wt%, 36 wt%, 37 wt%, 38 wt%, 39 wt%, 40 wt%, 41 wt%, 42 wt%, 43 wt%, 44 wt%, 45 wt%, etc., 8 to 13 wt% aluminum powder, for example, may be 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt%, 12 wt%, 12.5 wt%, 13 wt%, etc., 0.1 to 0.5 wt% thiodiglycol, for example, may be 0.1 wt%, 0.15 wt%, 0.2 wt%, 0.25 wt%, 0.3 wt%, 0.35 wt%, 0.4 wt%, 0.45 wt%, 0.5 wt%, etc., 0.3 to 1 wt% cellulose acetate, for example, may be 0.3 to 0.3 wt%, 0.35 wt%, 0.4 wt%, 0.45 wt%, 0.5 wt%, 0.55 wt%, 0.6 wt%, 0.65 wt%, 0.7 wt%, 0.75 wt%, 0.8 wt%, 0.85 wt%, 0.9 wt%, 0.95 wt%, 1 wt%, etc., 0.5-1.5 wt% of an emulsifier, for example, it may be 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1 wt%, 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt%, 1.5 wt%, etc., 4 to 8 wt% of a dispersant, for example, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, etc., 0.2 to 1.2 wt% ethanol, for example, it may be 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1 wt%, 1.1 wt%, 1.2 wt%, etc., the balance being deionized water, but not limited to the recited values, and other values within the above range are equally applicable.
Preferably, the temperature of the zinc-aluminum dip coating is 15-20 ℃, for example, 15 ℃, 15.5 ℃, 16 ℃, 16.5 ℃, 17 ℃, 17.5 ℃, 18 ℃, 18.5 ℃, 19 ℃, 19.5 ℃, 20 ℃, etc., but is not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the time for dip coating the zinc-aluminum coating is 1-3min, and may be, for example, 1min, 1.2min, 1.4min, 1.6min, 1.8min, 2min, 2.2min, 2.4min, 2.6min, 2.8min, 3min, etc., but is not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
Preferably, the spin-drying time is 10-20s, such as 10s, 11s, 12s, 13s, 14s, 15s, 16s, 17s, 18s, 19s, 20s, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the spin-drying speed is 180-220r/min, such as 180r/min, 182r/min, 184r/min, 186r/min, 188r/min, 190r/min, 192r/min, 194r/min, 196r/min, 198r/min, 200r/min, 202r/min, 204r/min, 206r/min, 208r/min, 210r/min, 212r/min, 214r/min, 216r/min, 218r/min, 220r/min, etc., but not limited to the values listed, and other values not listed in the above range of values are equally applicable.
In a preferred embodiment of the present invention, the pre-drying temperature is 70 to 80 ℃, and may be, for example, 70 ℃, 71 ℃, 72 ℃, 73 ℃, 74 ℃, 75 ℃, 76 ℃, 77 ℃, 78 ℃, 79 ℃, 80 ℃, etc., but the temperature is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
Preferably, the pre-drying time is 15-20min, such as 15min, 15.5min, 16min, 16.5min, 17min, 17.5min, 18min, 18.5min, 19min, 19.5min, 20min, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the temperature for curing is 280-320 ℃, and may be, for example, 280 ℃, 282 ℃, 284 ℃, 286 ℃, 288 ℃, 290 ℃, 292 ℃, 294 ℃, 296 ℃, 298 ℃, 300 ℃, 302 ℃, 304 ℃, 306 ℃, 308 ℃, 310 ℃, 312 ℃, 314 ℃, 316 ℃, 318 ℃, 320 ℃ and the like, but is not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
Preferably, the baking curing time is 25-30min, such as 25min, 25.5min, 26min, 26.5min, 27min, 27.5min, 28min, 28.5min, 29min, 29.5min, 30min, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, cooling is performed after the baking solidification.
Preferably, the cooling mode is natural cooling.
As a preferable technical scheme of the invention, the surface treatment process comprises the following steps:
(1) preparing a zinc-nickel alloy layer by adopting an electroplating method: firstly, deoiling a standard part for 15-20min at 70-80 ℃ by adopting deoiling liquid containing 60-80g/L deoiling powder SF301, cleaning the standard part for 5-10s by using hot water at 80-100 ℃, and cleaning the standard part for 5-10s by using cold water at 0-20 ℃; secondly, after primary anodic electrolysis is carried out for 3-5min at 40-50 ℃ by adopting electrolyte containing 120-plus-130 g/L electrolytic degreasing powder SF303A, acid washing is carried out for 3-5min at 20-30 ℃ by adopting 30-40% hydrochloric acid, secondary anodic electrolysis is carried out for 3-5min at 40-50 ℃ by adopting electrolyte containing 120-plus-130 g/L electrolytic degreasing powder SF303A, and the current density of the primary anodic electrolysis and the secondary anodic electrolysis is controlled to be 2-5A/dm2(ii) a Thirdly, activating for 30-50s at 20-30 ℃ by using 20-30% hydrochloric acid; then, 20-40g/L sodium hydroxide solution is adopted for presoaking for 10-30s at 20-30 ℃; then, taking the standard component as a cathode, and electroplating for 7-10min in an alkaline zinc-nickel electroplating solution containing 6-10g/L zinc ions, 0.6-1g/L nickel ions and 120-150g/L sodium hydroxide; finally, adopting citric acid solution with pH of 3-4 to emit light for 30-60s at 20-30 ℃;
wherein, after primary anode electrolysis, acid washing, secondary anode electrolysis, activation, electroplating and bright dipping, the water washing is carried out for 2-6min at 20-30 ℃;
(2) preparing a zinc-aluminum coating by adopting a dip-coating method: firstly, dip-coating by using dip-coating liquid at 15-20 ℃ for 1-3min, and then spin-drying for 10-20s under the condition of 180-220 r/min; secondly, pre-drying for 15-20min at 70-80 ℃; then, baking and curing at the temperature of 280-320 ℃ for 25-30min, and naturally cooling;
wherein the dip-coating liquid comprises 25-45 wt% of zinc powder, 8-13 wt% of aluminum powder, 0.1-0.5 wt% of thiodiglycol, 0.3-1 wt% of cellulose acetate butyrate, 0.5-1.5 wt% of emulsifier, 4-8 wt% of dispersant, 0.2-1.2 wt% of ethanol and the balance of deionized water.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the following beneficial effects:
(1) the surface treatment process of the invention prepares a double-layer composite layer on the standard component, the thickness of the double-layer composite layer reaches 18 mu m and above, and the anti-corrosion effect is greatly enhanced;
(2) the standard component obtained by the surface treatment process has a double-layer composite layer on the surface, is high in thickness, overcomes the problem of insufficient assembly precision, and achieves the effects of fastening and noise reduction.
Drawings
FIG. 1 is a flow chart of a surface treatment process according to the present invention;
FIG. 2 is a schematic view of a double-layered composite layer on a standard part obtained by the surface treatment process of the present invention;
in the drawings, 1-standard; a 2-zinc-nickel alloy layer; 3-zinc-aluminum coating.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
It is worth to be noted that the surface treatment process according to the embodiment of the present invention includes sequentially performing degreasing, primary anodic electrolysis, acid washing, secondary anodic electrolysis, activation, zinc-nickel alloy layer electroplating, brightening, zinc-aluminum coating dip-coating, spin-drying, pre-drying, baking, curing and cooling, as shown in fig. 1; the standard component 1 obtained by the surface treatment process of the embodiment of the invention has a double-layer composite layer on the surface, as shown in fig. 2, the double-layer composite layer comprises a zinc-nickel alloy layer 2 and a zinc-aluminum coating 3.
Example 1
The embodiment provides a surface treatment process of a standard part, which comprises the following steps:
(1) preparing a zinc-nickel alloy layer by adopting an electroplating method: firstly, deoiling a 65Mn ceiling skylight clamp by deoiling liquid containing 80g/L deoiling powder SF301 at 70 ℃ for 18min, cleaning the clamp by hot water at 90 ℃ for 10s, and cleaning the clamp by cold water at 10 ℃ for 8 s; secondly, after the primary anode electrolysis of 120g/L electrolytic degreasing powder SF303A for 3min at 50 ℃, the acid cleaning is carried out for 4min at 20 ℃ by using 40% hydrochloric acid, then the secondary anode electrolysis is carried out for 5min at 40 ℃ by using the electrolyte of 125g/L electrolytic degreasing powder SF303A, and the current density of the primary anode electrolysis and the secondary anode electrolysis is controlled to be 3A/dm2(ii) a Thirdly, activating the mixture for 50s at 25 ℃ by using 25% hydrochloric acid; then, presoaking for 20s at 25 ℃ by adopting 30g/L sodium hydroxide solution; then, taking a standard component as a cathode, and electroplating for 8min in an alkaline zinc-nickel electroplating solution containing 10g/L of zinc ions, 0.8g/L of nickel ions and 120g/L of sodium hydroxide; finally, adopting a citric acid solution with pH of 4 to emit light for 45s at 25 ℃;
wherein, after primary anode electrolysis, acid washing, secondary anode electrolysis, activation, electroplating and bright dipping, the water washing is carried out for 4min at 25 ℃;
(2) preparing a zinc-aluminum coating by adopting a dip-coating method: firstly, dip-coating the mixture for 2min at 20 ℃ by using dip-coating liquid, and then spin-drying the mixture for 15s at the speed of 200 r/min; secondly, pre-drying for 20min at 75 ℃; then, baking and curing the mixture at 300 ℃ for 30min, and naturally cooling the mixture;
wherein the dip-coating solution comprises 45 wt% of zinc powder, 8 wt% of aluminum powder, 0.5 wt% of thiodiglycol, 0.6 wt% of cellulose acetate butyrate, 1 wt% of alkylphenol polyoxyethylene, 8 wt% of sodium oleate, 0.8 wt% of ethanol and 36.1 wt% of deionized water.
Example 2
The embodiment provides a surface treatment process of a standard part, which comprises the following steps:
(1) preparing a zinc-nickel alloy layer by adopting an electroplating method: first, adoptDegreasing the vehicle lamp fastening bolt of SCM35 for 20min at 75 ℃ by using degreasing liquid containing 60g/L degreasing powder SF301, cleaning the vehicle lamp fastening bolt for 8s by using hot water at 80 ℃ and cleaning the vehicle lamp fastening bolt for 10s by using cold water at 0 ℃; secondly, after the primary anode electrolysis of 130g/L electrolytic degreasing powder SF303A for 4min at 45 ℃, 30% hydrochloric acid is adopted for pickling for 5min at 25 ℃, and then the secondary anode electrolysis of 120g/L electrolytic degreasing powder SF303A at 50 ℃ for 3min, wherein the current density of the primary anode electrolysis and the secondary anode electrolysis is controlled to be 5A/dm2(ii) a Thirdly, activating for 40s at 30 ℃ by using 20% hydrochloric acid; then, 20g/L sodium hydroxide solution is adopted for presoaking for 10s at 30 ℃; then, taking a standard component as a cathode, and electroplating for 7min in an alkaline zinc-nickel electroplating solution containing 6g/L of zinc ions, 1g/L of nickel ions and 150g/L of sodium hydroxide; finally, adopting a citric acid solution with the pH value of 3.5 to emit light for 30s at the temperature of 30 ℃;
wherein, after primary anode electrolysis, acid washing, secondary anode electrolysis, activation, electroplating and bright dipping, the water washing is carried out for 2min at 30 ℃;
(2) preparing a zinc-aluminum coating by adopting a dip-coating method: firstly, dip-coating the mixture for 3min at 15 ℃ by using dip-coating liquid, and then spin-drying the mixture for 20s at 180 r/min; secondly, pre-drying for 18min at 70 ℃; then, baking and curing the mixture at 320 ℃ for 25min, and naturally cooling the mixture;
wherein the dip-coating solution comprises 25 wt% of zinc powder, 13 wt% of aluminum powder, 0.3 wt% of thiodiglycol, 0.3 wt% of cellulose acetate butyrate, 1.5 wt% of alkylphenol polyoxyethylene, 6 wt% of sodium oleate, 0.2 wt% of ethanol and 53.7 wt% of deionized water.
Example 3
The embodiment provides a surface treatment process of a standard part, which comprises the following steps:
(1) preparing a zinc-nickel alloy layer by adopting an electroplating method: firstly, deoiling a vehicle lamp fastening bolt of SCM35 for 15min at 80 ℃ by adopting deoiling liquid containing 70g/L deoiling powder SF301, cleaning for 5s by hot water at 100 ℃, and cleaning for 5s by cold water at 20 ℃; secondly, after the primary anode electrolysis of the electrolyte containing 125g/L electrolytic degreasing powder SF303A at 40 ℃ for 5min, the acid cleaning is carried out for 3min at 30 ℃ by using 35% hydrochloric acid, and then the secondary anode electrolysis of the electrolyte containing 130g/L electrolytic degreasing powder SF303A at 45 ℃ for 4min is carried out, and the primary anode electrolysis and the secondary anode electrolysis are controlledThe current density of the solution is 2A/dm2(ii) a Thirdly, activating the mixture for 30 seconds at 20 ℃ by using 30% hydrochloric acid; then, presoaking for 30s at 20 ℃ by adopting 40g/L sodium hydroxide solution; then, using a standard component as a cathode, and electroplating for 10min in an alkaline zinc-nickel electroplating solution containing 8g/L of zinc ions, 0.6g/L of nickel ions and 135g/L of sodium hydroxide; finally, adopting a citric acid solution with pH of 3 to emit light for 60s at 20 ℃;
wherein, after primary anode electrolysis, acid washing, secondary anode electrolysis, activation, electroplating and bright dipping, the water is washed for 6min at 20 ℃;
(2) preparing a zinc-aluminum coating by adopting a dip-coating method: firstly, dip-coating the mixture for 1min at 18 ℃ by using dip-coating liquid, and then spin-drying the mixture for 10s at 220 r/min; secondly, pre-drying for 15min at 80 ℃; then, baking and curing the mixture at 280 ℃ for 28min, and naturally cooling the mixture;
wherein the dip-coating solution comprises 35 wt% of zinc powder, 10 wt% of aluminum powder, 0.1 wt% of thiodiglycol, 1 wt% of cellulose acetate butyrate, 0.5 wt% of alkylphenol polyoxyethylene, 4 wt% of sodium oleate, 1.2 wt% of ethanol and 48.2 wt% of deionized water.
Comparative example 1
This comparative example provides a surface treatment process for a standard part, as described with reference to example 1, with the only difference that: preparing a zinc-aluminum coating layer by adopting a dip-coating method; namely, the surface treatment process comprises the steps of:
firstly, deoiling a 65Mn ceiling skylight clamp by deoiling liquid containing 80g/L deoiling powder SF301 at 70 ℃ for 18min, cleaning the clamp by hot water at 90 ℃ for 10s, and cleaning the clamp by cold water at 10 ℃ for 8 s; secondly, after the primary anode electrolysis of 120g/L electrolytic degreasing powder SF303A for 3min at 50 ℃, the acid cleaning is carried out for 4min at 20 ℃ by using 40% hydrochloric acid, then the secondary anode electrolysis is carried out for 5min at 40 ℃ by using the electrolyte of 125g/L electrolytic degreasing powder SF303A, and the current density of the primary anode electrolysis and the secondary anode electrolysis is controlled to be 3A/dm2(ii) a Thirdly, activating the mixture for 50s at 25 ℃ by using 25% hydrochloric acid; then, presoaking for 20s at 25 ℃ by adopting 30g/L sodium hydroxide solution; then, taking a standard component as a cathode, and electroplating for 8min in an alkaline zinc-nickel electroplating solution containing 10g/L of zinc ions, 0.8g/L of nickel ions and 120g/L of sodium hydroxide; finally, citric acid solution with pH 4 is usedLight is emitted for 45s at 25 ℃;
wherein, after primary anode electrolysis, acid washing, secondary anode electrolysis, activation, electroplating and bright dipping, the water washing is carried out for 4min at 25 ℃.
Comparative example 2
This comparative example provides a surface treatment process for a standard part, as described with reference to example 1, with the only difference that: preparing a zinc-nickel alloy layer without adopting an electroplating method; namely, the surface treatment process comprises the steps of:
firstly, dip-coating the mixture for 2min at 20 ℃ by using dip-coating liquid, and then spin-drying the mixture for 15s at the speed of 200 r/min; secondly, pre-drying for 20min at 75 ℃; then, baking and curing the mixture at 300 ℃ for 30min, and naturally cooling the mixture;
wherein the dip-coating solution comprises 45 wt% of zinc powder, 8 wt% of aluminum powder, 0.5 wt% of thiodiglycol, 0.6 wt% of cellulose acetate butyrate, 1 wt% of alkylphenol polyoxyethylene, 8 wt% of sodium oleate, 0.8 wt% of ethanol and 36.1 wt% of deionized water.
The above examples and comparative examples were subjected to a neutral salt spray test measured according to the method disclosed in the national standard GB/T10125-2012 "Artificial atmosphere Corrosion test-salt spray test", and the time at which the standard component began to develop red rust in the test was recorded.
The results of the neutral salt spray tests of the above examples and comparative examples are shown in table 1.
TABLE 1
The following points can be derived from table 1:
(1) as can be seen from the examples 1-3, the surface treatment process of the invention firstly adopts an electroplating method to prepare the zinc-nickel alloy layer, and then adopts a dip-coating method to prepare the zinc-aluminum coating, so as to obtain a double-layer composite layer, wherein the thickness of the double-layer composite layer is more than or equal to 18 μm; in the neutral salt spray test, the time for starting red rust is more than 2500 h;
(2) comparing example 1 with comparative example 1, it can be seen that, since comparative example 1 does not adopt the dip coating method to prepare the zinc-aluminum coating, the surface of the standard part only has the zinc-nickel alloy layer, the thickness of the zinc-nickel alloy layer is small, and red rust begins to grow in 1325h in the neutral salt spray test;
(3) comparing example 1 with comparative example 2, it can be seen that, since comparative example 2 does not adopt the electroplating method to prepare the zinc-nickel alloy layer, the surface of the standard part only has the zinc-aluminum coating, the thickness of the zinc-aluminum coating is small, and red rust begins to grow within 786h in the neutral salt spray test; the zinc-aluminum coating layer prepared by the dip coating method of example 1 had a zinc-nickel alloy layer on the surface of the substrate, while the zinc-aluminum coating layer prepared by the dip coating method of comparative example 2 had 65Mn on the surface of the substrate, and the thickness of the zinc-aluminum coating layer was not uniform under the same conditions due to the difference in the substrates, and the thickness of the zinc-aluminum coating layer was 14.3 μm in example 1 and 13.8 μm in comparative example 2.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The surface treatment process of the standard component is characterized in that the surface treatment process comprises the steps of preparing a zinc-nickel alloy layer by adopting an electroplating method, and preparing a zinc-aluminum coating by adopting a dip coating method.
2. The surface treatment process according to claim 1, wherein the electroplating method comprises degreasing, anodic electrolysis, activation, zinc-nickel alloy layer electroplating and bright dipping which are sequentially carried out;
preferably, the oil removal adopts oil removal liquid containing oil removal powder;
preferably, the oil powder removing content in the deoiling liquid is 60-80 g/L;
preferably, the type of the oil removing powder is SF 301;
preferably, the temperature for removing the oil is 70-80 ℃;
preferably, the oil removing time is 15-20 min;
preferably, after the degreasing, the anode is cleaned before electrolysis;
preferably, the washing comprises hot water washing and cold water washing which are sequentially carried out;
preferably, the temperature of the hot water cleaning is 80-100 ℃;
preferably, the time of the hot water cleaning is 5-10 s;
preferably, the temperature of the cold water washing is 0-20 ℃;
preferably, the time for the cold water washing is 5-10 s.
3. The surface treatment process according to claim 2, wherein the anodic electrolysis comprises primary anodic electrolysis, acid washing and secondary anodic electrolysis which are performed in sequence;
preferably, the primary anode electrolysis and the secondary anode electrolysis both adopt electrolyte containing electric stripping oil powder;
preferably, the electrolytic oil removal powder content of the electrolyte in the primary anodic electrolysis and the secondary anodic electrolysis is 120-130 g/L;
preferably, the electrolytic degreasing powder of the electrolyte in the primary anode electrolysis and the electrolyte in the secondary anode electrolysis are both SF 303A;
preferably, the temperature of the primary anodic electrolysis and the temperature of the secondary anodic electrolysis are both 40-50 ℃;
preferably, the time of the primary anodic electrolysis and the time of the secondary anodic electrolysis are both 3-5 min;
preferably, the current density of the primary anodic electrolysis and the current density of the secondary anodic electrolysis are both 2-5A/dm2；
Preferably, the acid washing solution adopted by the acid washing comprises hydrochloric acid with the concentration of 30-40 wt%;
preferably, the temperature of the acid washing is 20-30 ℃;
preferably, the time for pickling is 3-5 min.
4. A surface treatment process according to claim 2 or 3, wherein the activating solution used for the activation comprises hydrochloric acid with a concentration of 20-30 wt%;
preferably, the time of activation is 30-50 s;
preferably, the temperature of the activation is 20-30 ℃.
5. The surface treatment process according to any one of claims 2 to 4, wherein the electroplating of the zinc-nickel alloy layer comprises a pre-dipping and an electroplating performed in sequence;
preferably, the pre-immersion liquid adopted by the pre-immersion comprises sodium hydroxide solution with the content of 20-40 g/L;
preferably, the presoaking time is 10-30 s;
preferably, the temperature of the presoaking is 20-30 ℃;
preferably, in the electroplating, the standard acts as a cathode;
preferably, the electroplating solution used for electroplating comprises an alkaline zinc-nickel electroplating solution;
preferably, the content of the sodium hydroxide in the electroplating solution is 120-150 g/L;
preferably, the content of zinc ions in the electroplating solution is 6-10 g/L;
preferably, the content of nickel ions in the electroplating solution is 0.6-1 g/L;
preferably, the time of electroplating is 7-10 min.
6. The surface treatment process according to any one of claims 2 to 5, wherein the light-emitting agent for light emission comprises a citric acid solution with pH of 3 to 4;
preferably, the light emitting time is 30-60 s;
preferably, the temperature of the light extraction is 20-30 ℃.
7. The surface treatment process according to any one of claims 2 to 6, wherein water washing is performed after the primary anodic electrolysis, acid washing, secondary anodic electrolysis, activation, plating and brightening;
preferably, the time of the water washing is 2-6 min;
preferably, the temperature of the water washing is 20-30 ℃.
8. The surface treatment process according to any one of claims 1 to 7, wherein the dip coating method comprises dip coating of a zinc-aluminum coating, spin-drying, pre-drying and baking curing in sequence;
preferably, the dip coating solution adopted by the dip coating of the zinc-aluminum coating comprises zinc powder, aluminum powder, thiodiglycol, cellulose acetate butyrate, an emulsifier, a dispersant, ethanol and deionized water;
preferably, the dip-coating liquid comprises 25-45 wt% of zinc powder, 8-13 wt% of aluminum powder, 0.1-0.5 wt% of thiodiglycol, 0.3-1 wt% of cellulose acetate butyrate, 0.5-1.5 wt% of emulsifier, 4-8 wt% of dispersant, 0.2-1.2 wt% of ethanol and the balance of deionized water;
preferably, the temperature of the dip-coating zinc-aluminum coating is 15-20 ℃;
preferably, the time for dip coating the zinc-aluminum coating is 1-3 min;
preferably, the drying time is 10-20 s;
preferably, the spin-drying speed is 180-.
9. The surface treatment process according to claim 8, wherein the pre-drying temperature is 70-80 ℃;
preferably, the pre-drying time is 15-20 min;
preferably, the temperature for curing is 280-320 ℃;
preferably, the baking and curing time is 25-30 min;
preferably, cooling is performed after the baking solidification;
preferably, the cooling mode is natural cooling.
10. A surface treatment process according to any one of claims 1 to 9, characterized in that it comprises the following steps:
(1) preparing a zinc-nickel alloy layer by adopting an electroplating method: firstly, deoiling a standard part for 15-20min at 70-80 ℃ by adopting deoiling liquid containing 60-80g/L deoiling powder SF301, cleaning the standard part for 5-10s by using hot water at 80-100 ℃, and cleaning the standard part for 5-10s by using cold water at 0-20 ℃; secondly, after primary anodic electrolysis is carried out for 3-5min at 40-50 ℃ by adopting electrolyte containing 120-plus-130 g/L electrolytic degreasing powder SF303A, acid washing is carried out for 3-5min at 20-30 ℃ by adopting 30-40% hydrochloric acid, secondary anodic electrolysis is carried out for 3-5min at 40-50 ℃ by adopting electrolyte containing 120-plus-130 g/L electrolytic degreasing powder SF303A, and the current density of the primary anodic electrolysis and the secondary anodic electrolysis is controlled to be 2-5A/dm2(ii) a Thirdly, activating for 30-50s at 20-30 ℃ by using 20-30% hydrochloric acid; then, 20-40g/L sodium hydroxide solution is adopted for presoaking for 10-30s at 20-30 ℃; then, taking the standard component as a cathode, and electroplating for 7-10min in an alkaline zinc-nickel electroplating solution containing 6-10g/L zinc ions, 0.6-1g/L nickel ions and 120-150g/L sodium hydroxide; finally, adopting citric acid solution with pH of 3-4 to emit light for 30-60s at 20-30 ℃;
wherein, after primary anode electrolysis, acid washing, secondary anode electrolysis, activation, electroplating and bright dipping, the water washing is carried out for 2-6min at 20-30 ℃;
(2) preparing a zinc-aluminum coating by adopting a dip-coating method: firstly, dip-coating by using dip-coating liquid at 15-20 ℃ for 1-3min, and then spin-drying for 10-20s under the condition of 180-220 r/min; secondly, pre-drying for 15-20min at 70-80 ℃; then, baking and curing at the temperature of 280-320 ℃ for 25-30min, and naturally cooling;
wherein the dip-coating liquid comprises 25-45 wt% of zinc powder, 8-13 wt% of aluminum powder, 0.1-0.5 wt% of thiodiglycol, 0.3-1 wt% of cellulose acetate butyrate, 0.5-1.5 wt% of emulsifier, 4-8 wt% of dispersant, 0.2-1.2 wt% of ethanol and the balance of deionized water.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050282033A1 (en) * | 2003-01-31 | 2005-12-22 | Jee Steel Corporation | Black zinc-plated steel sheet |
| CN106086957A (en) * | 2016-08-08 | 2016-11-09 | 常熟市常力紧固件有限公司 | A kind of process of surface treatment of flange face bolt |
| CN106756552A (en) * | 2016-12-15 | 2017-05-31 | 苏州陈恒织造有限公司 | A kind of production technology of wear-resistant gear |
| EP3620545A2 (en) * | 2018-09-04 | 2020-03-11 | Ford Global Technologies, LLC | Brake disc and method for producing same |
| CN111778532A (en) * | 2020-08-05 | 2020-10-16 | 扬州市景杨表面工程有限公司 | Alkaline zinc-nickel electroplating method for lock ring and embedded ring of automobile fuel tank |
| CN112266632A (en) * | 2020-10-15 | 2021-01-26 | 南通神州金属涂覆有限公司 | Environment-friendly zinc-aluminum coating paint for metal parts and preparation method thereof |
| CN112609212A (en) * | 2020-12-03 | 2021-04-06 | 南通申海工业科技有限公司 | Zinc-nickel alloy electroplating process for part with spinning surface |
-
2021
- 2021-12-07 CN CN202111482651.5A patent/CN114016102A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050282033A1 (en) * | 2003-01-31 | 2005-12-22 | Jee Steel Corporation | Black zinc-plated steel sheet |
| CN106086957A (en) * | 2016-08-08 | 2016-11-09 | 常熟市常力紧固件有限公司 | A kind of process of surface treatment of flange face bolt |
| CN106756552A (en) * | 2016-12-15 | 2017-05-31 | 苏州陈恒织造有限公司 | A kind of production technology of wear-resistant gear |
| EP3620545A2 (en) * | 2018-09-04 | 2020-03-11 | Ford Global Technologies, LLC | Brake disc and method for producing same |
| CN111778532A (en) * | 2020-08-05 | 2020-10-16 | 扬州市景杨表面工程有限公司 | Alkaline zinc-nickel electroplating method for lock ring and embedded ring of automobile fuel tank |
| CN112266632A (en) * | 2020-10-15 | 2021-01-26 | 南通神州金属涂覆有限公司 | Environment-friendly zinc-aluminum coating paint for metal parts and preparation method thereof |
| CN112609212A (en) * | 2020-12-03 | 2021-04-06 | 南通申海工业科技有限公司 | Zinc-nickel alloy electroplating process for part with spinning surface |
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Application publication date: 20220208 |