CN110105840A - A method of improving corrosion resistance of aluminum alloy and intensity - Google Patents
A method of improving corrosion resistance of aluminum alloy and intensity Download PDFInfo
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- CN110105840A CN110105840A CN201910218895.9A CN201910218895A CN110105840A CN 110105840 A CN110105840 A CN 110105840A CN 201910218895 A CN201910218895 A CN 201910218895A CN 110105840 A CN110105840 A CN 110105840A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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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
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
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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
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The present invention relates to alloy surface processing technology fields, disclose a kind of method for improving corrosion resistance of aluminum alloy and intensity, comprising the following steps: Step 1: aluminium alloy is carried out de-oiling, pickling, activation processing, be then dried for standby；Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: nano-titanium dioxide 20-40g/L, a hydrated nickel chloride 60-80g/L, lanthana 0.2-0.6g/L, bath pH value 4.5-5.5；Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin 28-34g/L, butyl acetate 10-15g/L, nano silica 18-26g/L, polyethylene glycol 2-6g/L；Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing.The present invention uses electroplating processes, in aluminum alloy surface plated film, obtains the coating that thickness is uniform, wearability and corrosion resistance are high, then form layer protecting film in piece surface using surface coated treatment, can effectively prevent the generation of corrosion, easy to operate, practical.
Description
Technical field
The present invention relates to alloy surface processing technology fields, and in particular to a kind of improvement corrosion resistance of aluminum alloy and intensity
Method.
Background technique
Since the standard electrode potential of aluminium is relatively negative, Al and Al-alloy is easy to happen spot corrosion in moist atmosphere, makes
With easily corroding in the process, its performance and appearance are influenced, must could be used after surface treated.It is main currently on the market to use
Anti-corrosive treatment method be chromic acid salt treatment, although chromic acid salt treatment effect is preferable, it such as wherein contains there are larger drawback
There is Cr VI, very big harm can be caused to environment, with the continuous reinforcement of people's environmental consciousness, this processing method is not
It is disconnected to be rejected, it is therefore necessary to develop that effect is good, easy to operate, cost is relatively low and environmentally friendly aluminum alloy surface is anti-
Corrosion treatment method.The present invention uses electroplating processes, in aluminum alloy surface plated film, obtains uniform thickness, wearability and corrosion resistance
High coating, then layer protecting film is formed in piece surface using surface coated treatment, the generation of corrosion can be effectively prevented, and
And will not cause damages to environment, it is easy to operate, it is practical.
Summary of the invention
Technical problems to be solved: the purpose of the present invention is to solve deficiencies in the prior art, provide a kind of improvement
The method of corrosion resistance of aluminum alloy and intensity.
Technical solution:
The present invention provides a kind of improvement corrosion resistance of aluminum alloy and the methods of intensity, comprising the following steps:
Step 1: aluminium alloy is carried out de-oiling, pickling, activation processing, then it is dried for standby；
Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: nano-titanium dioxide
20-40g/L, a hydrated nickel chloride 60-80g/L, lanthana 0.2-0.6g/L, bath pH value 4.5-5.5；
Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin
28-34g/L, butyl acetate 10-15g/L, nano silica 18-26g/L, polyethylene glycol 2-6g/L；
Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing.
Preferably, deoiling treatment temperature is 60-70 DEG C in step 1, and time 10-15min, pickling temperature is room temperature, when
Between be 8s, activating treatment temperature is room temperature, time 8-10min.
Preferably, the partial size of nano-titanium dioxide is 100-200nm in step 2.
Preferably, the voltage of electroplating processes is 8-12V in step 2, and thickness of coating is 0.1-0.8mm, electroplating temperature
It is 40-80 DEG C.
Preferably, in step 3 coating the preparation method comprises the following steps: by formula, epoxy resin and butyl acetate are uniformly dispersed,
Then nano silica and polyethylene glycol ultrasonic disperse is added.
Preferably, the power of ultrasonic disperse described in the preparation method of coating is 400-500W, time 10- in step 3
20min。
Preferably, the partial size of nano silica is 40-60nm in step 3.
Preferably, the temperature that baking-curing is handled in step 4 is 220-260 DEG C, time 30-50s.
The utility model has the advantages that the present invention has carried out composite plating to aluminum alloy surface, nano particle is added in plating solution, nanometer
The wearability, anti-contact fatigue, nano particle that the addition of particle can significantly improve coating can significantly refine coating microstructure,
Make it that more dense uniform, such coating matrix metal crystal boundary be organized to increase, dislocation can be hindered mobile and micro-crack, to make
It obtains composites resins to be strengthened, improves the comprehensive performance of alloy material；
The present invention has carried out surface coated treatment to the aluminium alloy after plating, further increases its corrosion resistance, when with salt fog
Between extension, the shielding action of coating surface corrosion scales hinders the infiltration of corrosive medium, and the corrosion rate of coating is quick
It reduces, preferably protection can be provided to alloy.
Specific embodiment
Embodiment 1
Step 1: aluminium alloy is carried out deoiling treatment, temperature is 70 DEG C, time 10min, and degreaser ingredient is 50g/L hydrogen-oxygen
Change sodium and 8g/L sodium phosphate, then pickling, pickling temperature is room temperature, and time 8s, pickling solution ingredient is 100g/L phosphoric acid and 2g/
L hydrochloric acid, reactivation processing, activating treatment temperature are room temperature, and time 10min, activating solution is 200ml/mL nitric acid, is dried after processing
It does spare；
Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: 100nm nanometer two
Titanium oxide 40g/L, a hydrated nickel chloride 60g/L, lanthana 0.6g/L, bath pH value 4.5, the voltage of electroplating processes are 12V,
Thickness of coating is 0.1mm, and electroplating temperature is 80 DEG C；
Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin
28g/L, butyl acetate 15g/L, 40nm nano silica 26g/L, polyethylene glycol 2g/L, preparation method for coating be by formula,
Epoxy resin and butyl acetate are uniformly dispersed, nano silica and polyethylene glycol ultrasonic disperse, ultrasonic disperse is then added
Power be 500W, time 10min；
Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing, and the temperature of baking-curing processing is 260
DEG C, time 30s.
Embodiment 2
Step 1: aluminium alloy is carried out deoiling treatment, temperature is 60 DEG C, time 15min, and degreaser ingredient is 50g/L hydrogen-oxygen
Change sodium and 8g/L sodium phosphate, then pickling, pickling temperature is room temperature, and time 8s, pickling solution ingredient is 100g/L phosphoric acid and 2g/
L hydrochloric acid, reactivation processing, activating treatment temperature are room temperature, and time 8min, activating solution is 200ml/mL nitric acid, is dried after processing
It does spare；
Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: 200nm nanometer two
Titanium oxide 20g/L, a hydrated nickel chloride 80g/L, lanthana 0.2g/L, bath pH value 5.5, the voltage of electroplating processes are 8V,
Thickness of coating is 0.8mm, and electroplating temperature is 40 DEG C；
Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin
34g/L, butyl acetate 10g/L, 60nm nano silica 18g/L, polyethylene glycol 6g/L, preparation method for coating be by formula,
Epoxy resin and butyl acetate are uniformly dispersed, nano silica and polyethylene glycol ultrasonic disperse, ultrasonic disperse is then added
Power be 400W, time 20min；
Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing, and the temperature of baking-curing processing is 220
DEG C, time 50s.
Embodiment 3
Step 1: aluminium alloy is carried out deoiling treatment, temperature is 65 DEG C, time 12min, and degreaser ingredient is 50g/L hydrogen-oxygen
Change sodium and 8g/L sodium phosphate, then pickling, pickling temperature is room temperature, and time 8s, pickling solution ingredient is 100g/L phosphoric acid and 2g/
L hydrochloric acid, reactivation processing, activating treatment temperature are room temperature, and time 9min, activating solution is 200ml/mL nitric acid, is dried after processing
It does spare；
Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: 160nm nanometer two
Titanium oxide 25g/L, a hydrated nickel chloride 75g/L, lanthana 0.3g/L, bath pH value 5.0, the voltage of electroplating processes are 11V,
Thickness of coating is 0.3mm, and electroplating temperature is 75 DEG C；
Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin
30g/L, butyl acetate 14g/L, 45nm nano silica 24g/L, polyethylene glycol 3g/L, preparation method for coating be by formula,
Epoxy resin and butyl acetate are uniformly dispersed, nano silica and polyethylene glycol ultrasonic disperse, ultrasonic disperse is then added
Power be 460W, time 12min；
Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing, and the temperature of baking-curing processing is 250
DEG C, time 35s.
Embodiment 4
Step 1: aluminium alloy is carried out deoiling treatment, temperature is 65 DEG C, time 12min, and degreaser ingredient is 50g/L hydrogen-oxygen
Change sodium and 8g/L sodium phosphate, then pickling, pickling temperature is room temperature, and time 8s, pickling solution ingredient is 100g/L phosphoric acid and 2g/
L hydrochloric acid, reactivation processing, activating treatment temperature are room temperature, and time 9min, activating solution is 200ml/mL nitric acid, is dried after processing
It does spare；
Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: 140nm nanometer two
Titanium oxide 35g/L, a hydrated nickel chloride 65g/L, lanthana 0.5g/L, bath pH value 5.0, the voltage of electroplating processes are 9V,
Thickness of coating is 0.6mm, and electroplating temperature is 45 DEG C；
Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin
32g/L, butyl acetate 12g/L, 55nm nano silica 20g/L, polyethylene glycol 5g/L, preparation method for coating be by formula,
Epoxy resin and butyl acetate are uniformly dispersed, nano silica and polyethylene glycol ultrasonic disperse, ultrasonic disperse is then added
Power be 420W, time 18min；
Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing, and the temperature of baking-curing processing is 230
DEG C, time 45s.
Embodiment 5
Step 1: aluminium alloy is carried out deoiling treatment, temperature is 65 DEG C, time 12min, and degreaser ingredient is 50g/L hydrogen-oxygen
Change sodium and 8g/L sodium phosphate, then pickling, pickling temperature is room temperature, and time 8s, pickling solution ingredient is 100g/L phosphoric acid and 2g/
L hydrochloric acid, reactivation processing, activating treatment temperature are room temperature, and time 9min, activating solution is 200ml/mL nitric acid, is dried after processing
It does spare；
Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: 150nm nanometer two
Titanium oxide 30g/L, a hydrated nickel chloride 70g/L, lanthana 0.4g/L, bath pH value 5.0, the voltage of electroplating processes are 10V,
Thickness of coating is 0.45mm, and electroplating temperature is 60 DEG C；
Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin
31g/L, butyl acetate 13g/L, 50nm nano silica 22g/L, polyethylene glycol 4g/L, preparation method for coating be by formula,
Epoxy resin and butyl acetate are uniformly dispersed, nano silica and polyethylene glycol ultrasonic disperse, ultrasonic disperse is then added
Power be 450W, time 15min；
Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing, and the temperature of baking-curing processing is 240
DEG C, time 40s.
The aluminium alloy handled well in embodiment 1-5 is tested for the property, is evaluated by IS04628-1 ranking method, test
When box temperature be maintained at 35 DEG C ± 2 DEG C, brine strength is ± 10 g/L of 50 g/L, and spray amount is 1~2 mL/ (80 cm2H), it ties
Fruit such as the following table 1:
Table 1
| Resistance to saltfog energy/60h | Hardness/HV | |
| Embodiment 1 | Slight erosion, corroded area < 0.2% | 488 |
| Embodiment 2 | It is not blistering, corrosion-free | 542 |
| Embodiment 3 | It is not blistering, corrosion-free | 573 |
| Embodiment 4 | It is not blistering, corrosion-free | 620 |
| Embodiment 5 | It is not blistering, corrosion-free | 650 |
Claims (8)
1. a kind of method for improving corrosion resistance of aluminum alloy and intensity, which comprises the following steps:
Step 1: aluminium alloy is carried out de-oiling, pickling, activation processing, then it is dried for standby；
Step 2: by treated in step 1, aluminium alloy carries out electroplating processes, and plating solution includes following component: nano-titanium dioxide
20-40g/L, a hydrated nickel chloride 60-80g/L, lanthana 0.2-0.6g/L, bath pH value 4.5-5.5；
Step 3: by treated in step 2, aluminium alloy carries out surface coating process, and coating includes following component: epoxy resin
28-34g/L, butyl acetate 10-15g/L, nano silica 18-26g/L, polyethylene glycol 2-6g/L；
Step 4: by treated in step 3, aluminium alloy carries out baking-curing processing.
2. a kind of method for improving corrosion resistance of aluminum alloy and intensity according to claim 1, which is characterized in that step
Deoiling treatment temperature is 60-70 DEG C, time 10-15min in one, and pickling temperature is room temperature, time 8s, activating treatment temperature
For room temperature, time 8-10min.
3. a kind of method for improving corrosion resistance of aluminum alloy and intensity according to claim 1, which is characterized in that step
The partial size of nano-titanium dioxide is 100-200nm in two.
4. a kind of method for improving corrosion resistance of aluminum alloy and intensity according to claim 1, which is characterized in that step
The voltage of electroplating processes is 8-12V in two, and thickness of coating is 0.1-0.8mm, and electroplating temperature is 40-80 DEG C.
5. a kind of method for improving corrosion resistance of aluminum alloy and intensity according to claim 1, which is characterized in that step
In three coating the preparation method comprises the following steps: by formula, epoxy resin and butyl acetate are uniformly dispersed, nano silica is then added
With polyethylene glycol ultrasonic disperse.
6. a kind of method for improving corrosion resistance of aluminum alloy and intensity according to claim 5, which is characterized in that step
The power of ultrasonic disperse described in the preparation method of coating is 400-500W, time 10-20min in three.
7. a kind of method for improving corrosion resistance of aluminum alloy and intensity according to claim 1, which is characterized in that step
The partial size of nano silica is 40-60nm in three.
8. a kind of method for improving corrosion resistance of aluminum alloy and intensity according to claim 1, which is characterized in that step
The temperature that baking-curing is handled in four is 220-260 DEG C, time 30-50s.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565125A (en) * | 2019-08-05 | 2019-12-13 | 宣城金诺模塑科技有限公司 | nickel plating solution for automobile ornaments and electroplating method thereof |
| CN111926354A (en) * | 2020-10-12 | 2020-11-13 | 江西科技学院 | Electric element for computer data processing device and manufacturing method thereof |
| CN113583536A (en) * | 2021-07-26 | 2021-11-02 | 苏州市万利成制桶有限公司 | Formula and manufacturing process of outer-layer stab-resistant coating of environment-friendly metal barrel |
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| CN106700830A (en) * | 2016-12-14 | 2017-05-24 | 苏州纽东精密制造科技有限公司 | Anti-corrosive primer for automobile chassis |
| CN106756905A (en) * | 2017-01-20 | 2017-05-31 | 上海应用技术大学 | Compound nickel-base plating coat of nano-graphene and preparation method thereof |
| CN106868571A (en) * | 2016-12-25 | 2017-06-20 | 句容亿格纳米材料厂 | A kind of nanometer molybdenum palladium titanium electroplate liquid and preparation method thereof |
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| US20030098338A1 (en) * | 2001-11-21 | 2003-05-29 | Dockus Kostas F. | Methods for fluxless brazing |
| CN106700830A (en) * | 2016-12-14 | 2017-05-24 | 苏州纽东精密制造科技有限公司 | Anti-corrosive primer for automobile chassis |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565125A (en) * | 2019-08-05 | 2019-12-13 | 宣城金诺模塑科技有限公司 | nickel plating solution for automobile ornaments and electroplating method thereof |
| CN111926354A (en) * | 2020-10-12 | 2020-11-13 | 江西科技学院 | Electric element for computer data processing device and manufacturing method thereof |
| CN113583536A (en) * | 2021-07-26 | 2021-11-02 | 苏州市万利成制桶有限公司 | Formula and manufacturing process of outer-layer stab-resistant coating of environment-friendly metal barrel |
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