CN102268716A - Preparation method of colored electrophoretic coating on surface of magnesium-containing high-silicon wrought aluminum alloy - Google Patents
Preparation method of colored electrophoretic coating on surface of magnesium-containing high-silicon wrought aluminum alloy Download PDFInfo
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- CN102268716A CN102268716A CN2011102134011A CN201110213401A CN102268716A CN 102268716 A CN102268716 A CN 102268716A CN 2011102134011 A CN2011102134011 A CN 2011102134011A CN 201110213401 A CN201110213401 A CN 201110213401A CN 102268716 A CN102268716 A CN 102268716A
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Abstract
The invention relates to an alloy surface treatment technology, and particularly relates to a preparation method of a colored electrophoretic coating on the surface of a magnesium-containing high-silicon wrought aluminum alloy. The technical scheme provided by the invention comprises the steps of pretreatment, direct-current anodizing and anodic electrophoretic coating; and the points are as follows: the color is adjusted by different dyes or dye ratios, the process parameters of anodizing and electrophoretic coating are controlled, and the electrophoretic coating is carried out at the voltage of 130-140 V for 3 minutes to prepare a layer of colored electrophoretic coating on the surface of the magnesium-containing high-silicon wrought aluminum alloy, thereby improving the corrosion resistance and decorative effect of the surface of the magnesium-containing high-silicon wrought aluminum alloy. The properties of the electrophoretic coating provided by the invention reach or exceed the national standards.
Description
Technical field
The invention belongs to technical field of surface, be specifically related to a kind of preparation method that the high silicon wrought aluminium alloy of magnesium surface color electrophoresis is filmed that contains.
Background technology
Contain the high silicon wrought aluminium alloy of magnesium, what be a kind of silicon content up to 10-15wt% contains the high silicon wrought aluminium alloy of magnesium, being the novel aluminum alloy with complete independent intellectual property right of China research and development, is a kind of typical resource-conserving, environmentally friendly high-performance and low-cost novel material.It has, and to be better than 6XXX be the room temperature strength of wrought aluminium alloy and suitable with it plasticity, has wide application space at civilian and industrial circle.But in aluminum substrate, add the high content silicon element, can improve its castability, increase material hardness and intensity, reduced solidity to corrosion also.
The traditional process of surface treatment of aluminium alloy material section bar is oxidation, sealing and painted processing, the conversion film of this aluminium is out of doors during life-time service, in the time of particularly in acid rain or ocean environment, corrosion easily, poor durability, therefore from the seventies in 20th century, people attempt improving with the method for paint spraying the decorate properties and the working life of aluminium section bar for building.Industrialization has been used electrophoretic painting, powder coating and fluorocarbon-sprayed.The electrophoretic painting method is compared with other coating process has remarkable advantage, recycles, is easy to automatic production, is suitable for production in enormous quantities etc. as even film layer densification, solidity to corrosion height, coating.The limitation of electrophoresis coating technique is the single metal material that only is fit to have electroconductibility.
Summary of the invention
International blank in order to remedy prior art to containing the high silicon wrought aluminium alloy of magnesium surface-treated, the high silicon wrought aluminium alloy of magnesium solidity to corrosion is poor at containing, the weak point of ornamental difference, the invention provides the preparation method that a kind of color electrophoresis is filmed, at the paint film that contains the high silicon wrought aluminium alloy of magnesium external coating multicolour, contain the solidity to corrosion of the high silicon wrought aluminium alloy of magnesium and ornamental in order to raising.
The preparation process that electrophoresis of the present invention is filmed is: pre-treatment, dc anodizing and anode electro-coating.
Specifically carry out according to the following steps:
(1) pre-treatment
Choose and contain the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 300
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing and 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 60-65 C alkaline etching 2-3min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 98-100 C constant temperature pickling 2-3 min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4, 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2-3s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 15 ~ 30 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
The purpose of dedust is because the silicon content of silumin material own is higher, form the loose grey shape thing upper layer of one deck grey black after the alkaline etching at alloy surface, still residual after the pickling, this ash shape thing will lean on dedust technology to remove, dedust reaction more complicated, principal reaction has:
Si?+?4HNO
3?=?SiO
2ˉ?+?4NO
2-?+?2H
2O (1)
SiO
2?+?6HF?=?H
2SiF
6?+?2H
2O (2)
Al?+?4HNO
3?=?Al(NO
3)
3?+?NO-?+?2H
2O (3)
3M?+?8HNO
3?=?3M(NO
3)
2?+?2NO-?+?4H
2O (4)
Al
2O
3ˉ?+?6HNO
3?=?2Al(NO
3)
3?+?3H
2O (5)
M represents metallic elements such as manganese in the aluminum component, copper in the reaction (4).The effect of nitric acid is oxidation elemental silicon, dissolved oxygen aluminium film and generate aluminum nitrate, plays a major role to improving the chemical rightenning quality.The effect dissolve silica of hydrofluoric acid for the workpiece that blind hole is arranged, will fully be cleaned after the pickling, makes not remaining acid solution in the blind hole.
(2) anodic oxidation
To be anode, be negative electrode with graphite or stereotype, with the H of 160-180 g/L through pretreated Al alloy parts
2SO
4Solution carries out dc anodizing 20-30min at normal temperatures as the oxidation tank liquor, and current density is 1.5-1.8A/dm
2
(3) anode electro-coating
To place electrophoresis liquid through anodised Al alloy parts, and keep temperature 20-25 C, control voltage 130-140V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription is: 80-100mL/L water soluble acrylic resin, 12-15g/L dyestuff, 10mg/L dispersion agent.
Described coating is the blue or green orchid of phthalein, middle Huang or bright red, or middle Huang and phthalocyanine blue be according to weight ratio 4:1, middle Huang and bright red according to weight ratio 3:2, and phthalocyanine blue mixes according to weight ratio 14:1 or 1:1 with bright red, and described dispersion agent is a polyvinylpyrrolidone.
By the toning between different dyes and change the electrophoresis process parameter, the electrophoresis that can obtain blueness, yellow, green, orange, purple, brown or red seven kinds of colors is filmed.
The present invention preparation contain the high silicon wrought aluminium alloy of magnesium surface electrophoresis composite membrane (anode oxide film+electrodeposited paint film) thickness 20 ~ 45 μ m that film.The sample of application electrodeposited paint film soaks 24h, soaks 30h in 10% hydrochloric acid soln, soak 30h in 10% salt solution, soak 30h in acetone, carries out neutral salt spray test 240h in 5g/L NaOH solution, corrosion defaults such as spot corrosion, crackle, bubble, corrosion stream all do not appear in coating surface, the back quality no change of weighing.Sticking power reaches 0 grade (GB/T 9286-1998), hardness 3H ~ 4H(GB/T 6739-2006), protection class all reaches (GB 5237.3-2008) more than 9.5 grades.
The invention has the beneficial effects as follows:
The present invention passes through different dyes or the toning of dye ligand ratio and controls the processing parameter of anodic oxidation, electrophoretic painting, film containing the chromatic electrophoresis of the high silicon wrought aluminium alloy of magnesium surface preparation one deck, it is ornamental to have improved the solidity to corrosion that contains the high silicon wrought aluminium alloy of magnesium surface, increase varieties and designs, prolong product work-ing life, improve product economy and be worth, strengthen the competitive power of product on market.
Embodiment
Used chemical reagent is the analytical pure level chemical reagent that market is bought in the embodiment of the invention.
Embodiment 1
(1) pre-treatment
That chooses silicone content and be 10wt% contains the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 00
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing, 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 60 ℃ of alkaline etching 3min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 98C constant temperature pickling 3 min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4, 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 15 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
(2) anodic oxidation
To be anode through pretreated Al alloy parts, with the stereotype negative electrode, with 160 g/L mass concentrations 98% H
2SO
4Solution carries out dc anodizing 20min at normal temperatures as anode oxidation groove liquid, and current density is 1.8A/dm
2
(3) anode electro-coating
To place electrophoresis liquid through anodised Al alloy parts, be anode with the workpiece, is negative electrode with 316 stainless steels.Keep temperature 20 ~ 25 C, control volts DS 130V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription: the 80mL/L water soluble acrylic resin, the 12g/L phthalocyanine blue, the 10mg/L dispersion agent obtains the thick blue electrophoresis of 20 μ m and films.
Embodiment 2
Embodiment 2 is that the electrophoresis liquid prescription is with the difference of embodiment 1: the 90mL/L water soluble acrylic resin, and the 13g/L phthalocyanine blue, the 10mg/L dispersion agent obtains the thick blue electrophoresis of 20 μ m and films.
Embodiment 3
Embodiment 3 is that the electrophoresis liquid prescription is with the difference of embodiment 1: 100 mL/L water soluble acrylic resins, and the 15g/L phthalocyanine blue, the 10mg/L dispersion agent obtains the thick blue electrophoresis of 20 μ m and films.
Embodiment 4
(1) pre-treatment
That chooses silicone content and be 12wt% contains the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 00
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing, 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 65 C alkaline etching 2min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 100 C constant temperature pickling, 2 min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4, 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 3s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 15 ~ 30 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
(2) anodic oxidation
To be anode through pretreated Al alloy parts, with graphite negative electrode, with 180 g/L mass concentrations 98% H
2SO
4Solution carries out dc anodizing 25min at normal temperatures as anode oxidation groove liquid, and current density is 1.8A/dm
2
(3) anode electro-coating
To place electrophoresis liquid through anodised Al alloy parts, workpiece is an anode, and 316 stainless steels are negative electrode, keeps temperature 20 ~ 25 C, and control volts DS 140V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription: the 80mL/L water soluble acrylic resin, yellow among the 12g/L, the 10mg/L dispersion agent obtains the thick yellow electrophoretic of 25 μ m and films.
Embodiment 5
The difference of embodiment 5 and embodiment 4 is that the prescription of electrophoresis liquid is: the 90mL/L water soluble acrylic resin, yellow among the 14g/L, the 10mg/L dispersion agent obtains the thick yellow electrophoretic of 25 μ m and films.
Embodiment 6
The difference of embodiment 6 and embodiment 5 is that the prescription of electrophoresis liquid is: the 100mL/L water soluble acrylic resin, yellow among the 15g/L, the 10mg/L dispersion agent obtains the thick yellow electrophoretic of 25 μ m and films.
Embodiment 7
(1) pre-treatment
That chooses silicone content and be 13wt% contains the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 00
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing, 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 62 C alkaline etching 2min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 99 C constant temperature pickling, 3 min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4And 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2-3s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 20 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
(2) anodic oxidation
To be anode through pretreated workpiece, with graphite negative electrode, with 170 g/L mass concentrations 98% H
2SO
4Solution carries out dc anodizing 25min at normal temperatures as anode oxidation groove liquid, and current density is 1.7A/dm
2
(3) anode electro-coating
To place electrophoresis liquid through anodised Al alloy parts, workpiece is an anode, and 316 stainless steels are negative electrode, keeps temperature 20 ~ 25 C, and control volts DS 135V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription: the 80mL/L water soluble acrylic resin, Huang mixes by weight 4:1 with phthalocyanine blue among the 12g/L, and the 10mg/L dispersion agent obtains the thick green electrophoresis of 30 μ m and films.
Embodiment 8
The difference of embodiment 8 and embodiment 7 is that the prescription of electrophoresis liquid is: the 90mL/L water soluble acrylic resin, and Huang mixes by weight 4:1 with phthalocyanine blue among the 13g/L, and the 10mg/L dispersion agent obtains the thick green electrophoresis of 30 μ m and films.
Embodiment 9
The difference of embodiment 9 and embodiment 7 is that the prescription of electrophoresis liquid is: the 100mL/L water soluble acrylic resin, and Huang mixes by weight 4:1 with phthalocyanine blue among the 15g/L, and the 10mg/L dispersion agent obtains the thick green electrophoresis of 30 μ m and films.
Embodiment 10
(1) pre-treatment
That chooses silicone content and be 14wt% contains the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 00
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing, 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 64 C alkaline etching 2min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 100 C constant temperature pickling 2min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4, 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 25 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
(2) anodic oxidation
To be anode through pretreated Al alloy parts, with the stereotype negative electrode, with 170 g/L mass concentrations 98% H
2SO
4Solution carries out dc anodizing 25min at normal temperatures as anode oxidation groove liquid, and current density is 1.7A/dm
2
(3) electrophoretic painting
To place electrophoresis liquid through anodised Al alloy parts, workpiece is an anode, and 316 stainless steels are negative electrode, keeps temperature 20 ~ 25 C, and control volts DS 135V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription: the 80mL/L water soluble acrylic resin, Huang mixes according to weight ratio 3:2 with bright red among the 12g/L, and the 10mg/L dispersion agent obtains the thick orange electrophoresis of 35 μ m and films.
Embodiment 11
The difference of embodiment 11 and embodiment 10 is that the prescription of electrophoresis liquid is: the 90mL/L water soluble acrylic resin, and Huang mixes according to weight ratio 3:2 with bright red among the 14g/L, and the 10mg/L dispersion agent obtains the thick orange electrophoresis of 35 μ m and films.
Embodiment 12
The difference of embodiment 12 and embodiment 10 is that the prescription of electrophoresis liquid is: the 100mL/L water soluble acrylic resin, and Huang mixes according to weight ratio 3:2 with bright red among the 15g/L, and the 10mg/L dispersion agent obtains the thick orange electrophoresis of 35 μ m and films.
Embodiment 13
(1) pre-treatment
That chooses silicone content and be 15wt% contains the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 00
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing, 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 65 C alkaline etching 2min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 98 C constant temperature pickling, 3 min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4, 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 30 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
(2) anodic oxidation
To be anode through pretreated Al alloy parts, be negative electrode with graphite or stereotype, with 170 g/L mass concentrations 98% H
2SO
4Solution carries out dc anodizing 25min at normal temperatures as anode oxidation groove liquid, and current density is 1.7A/dm
2
(3) anode electro-coating
To place electrophoresis liquid through anodised Al alloy parts, workpiece is an anode, and 316 stainless steels are negative electrode, keeps temperature 20 ~ 25 C, and control volts DS 135V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription: the 80mL/L water soluble acrylic resin, the 12g/L phthalocyanine blue mixes according to weight ratio 14:1 with bright red, and the 10mg/L dispersion agent obtains the thick electrophoresis of purple 40 μ m and films.
Embodiment 14
The difference of embodiment 14 and embodiment 13 is that the prescription of electrophoresis liquid is: the 90mL/L water soluble acrylic resin, and the 14g/L phthalocyanine blue mixes according to weight ratio 14:1 with bright red, and the 10mg/L dispersion agent obtains the thick purple electrophoresis of 40 μ m and films.
Embodiment 15
The difference of embodiment 15 and embodiment 13 is that the prescription of electrophoresis liquid is: the 100mL/L water soluble acrylic resin, and the 15g/L phthalocyanine blue mixes according to weight ratio 14:1 with bright red, and the 10mg/L dispersion agent obtains the thick purple electrophoresis of 40 μ m and films.
Embodiment 16
(1) pre-treatment
That chooses silicone content and be 11wt% contains the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 00
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing, 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 62 C alkaline etching 2min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 99 C constant temperature pickling, 3 min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4And 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2-3s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 20 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
(2) anodic oxidation
To be anode through pretreated workpiece, with graphite negative electrode, with 170 g/L mass concentrations 98% H
2SO
4Solution carries out dc anodizing 25min at normal temperatures as anode oxidation groove liquid, and current density is 1.7A/dm
2
(3) anode electro-coating
To place electrophoresis liquid through anodised Al alloy parts, be anode with the workpiece, and 316 stainless steels are negative electrode, keeps temperature 20 ~ 25 C, and control volts DS 135V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription: the 100mL/L water soluble acrylic resin, the 15g/L phthalocyanine blue mixes by weight 1:1 with bright red, and the 10mg/L dispersion agent obtains the thick brown electrophoresis of 45 μ m and films.
Embodiment 17
The difference of embodiment 17 and embodiment 16 is that the prescription of electrophoresis liquid is: the 90mL/L water soluble acrylic resin, and the 13g/L phthalocyanine blue mixes according to weight ratio 1:1 with bright red, and the 10mg/L dispersion agent obtains the thick brown electrophoresis of 45 μ m and films.
Embodiment 18
The difference of embodiment 18 and embodiment 16 is that the prescription of electrophoresis liquid is: the 80mL/L water soluble acrylic resin, and the 12g/L phthalocyanine blue mixes by weight 1:1 with bright red, and the 10mg/L dispersion agent obtains the thick brown electrophoresis of 45 μ m and films.
Embodiment 19
(1) pre-treatment
That chooses silicone content and be 10wt% contains the high silicon wrought aluminium alloy of magnesium workpiece, with it earlier after 00
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing, 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 62 C alkaline etching 2min, the mixed alkali liquor composition in the alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, stop 1min after, put it into again in the acid tank in 99 C constant temperature pickling, 3 min, the composition of mix acid liquor is in the acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4And 3g/L Na
2CO
3Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2-3s at normal temperatures in the dedust tank liquor, the prescription of dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 20 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
(2) anodic oxidation
To be anode through pretreated workpiece, with graphite negative electrode, with 160 g/L mass concentrations 98% H
2SO
4Solution carries out dc anodizing 30min at normal temperatures as anode oxidation groove liquid, and current density is 1.5A/dm
2
(3) anode electro-coating
To place electrophoresis liquid through anodised Al alloy parts, workpiece is an anode, and 316 stainless steels are negative electrode, keeps temperature 20 ~ 25 C, and control volts DS 140V carries out electrophoretic painting 3min.
The electrophoresis liquid prescription: the 80mL/L water soluble acrylic resin, 12g/L is bright red, and the 10mg/L dispersion agent obtains the thick red electrophoresis of 20 μ m and films.
Embodiment 20
The difference of embodiment 20 and embodiment 19 is that the prescription of electrophoresis liquid is: the 90mL/L water soluble acrylic resin, and 14g/L is bright red, and the 10mg/L dispersion agent obtains the thick red electrophoresis of 20 μ m and films.
Embodiment 21
The difference of embodiment 21 and embodiment 19 is that the prescription of electrophoresis liquid is: the 100mL/L water soluble acrylic resin, and 15g/L is bright red, and the 10mg/L dispersion agent obtains the thick red electrophoresis of 20 μ m and films.
Claims (4)
1. one kind contains the preparation method that the high silicon wrought aluminium alloy of magnesium surface color electrophoresis is filmed, and it is characterized in that: at first choose and contain the high silicon wrought aluminium alloy of magnesium workpiece, earlier through 300
#Liquid honing, 600
#Liquid honing, 800
#Liquid honing and 1000
#Liquid honing with the polishing machine polishing, makes workpiece form finish plate again; Put it into then that ultrasonic 10 min carry out oil removal treatment in the acetone; Be placed on afterwards in the alkali groove in 60-65 C alkaline etching 2-3min; Workpiece after the alkaline etching is cleaned in the migration Rinsing Area in 1min, behind the stop 1min, put it into again in the acid tank in 98-100 C constant temperature pickling 2-3 min; Workpiece after the pickling is soaked 1min in Rinsing Area, in air, dry then; Workpiece after drying is carried out dedust handle, workpiece is soaked 2-3s at normal temperatures in the dedust tank liquor; To be anode, be negative electrode with graphite or stereotype, then with the H of 160-180 g/L through pretreated Al alloy parts
2SO
4Solution carries out dc anodizing 20-30min at normal temperatures as the oxidation tank liquor, and current density is 1.5-1.8A/dm
2It is characterized in that and to place electrophoresis liquid through anodised Al alloy parts, keep temperature 20-25 C, control voltage 130-140V, carry out electrophoretic painting 3min, described electrophoresis liquid prescription is: the 80-100mL/L water soluble acrylic resin, the 12-15g/L dyestuff, the 10mg/L dispersion agent finally obtains blueness, yellow, green, orange, purple, brown or red electrophoresis is filmed.
2. a kind of preparation method that the high silicon wrought aluminium alloy of magnesium surface color electrophoresis is filmed that contains according to claim 1 is characterized in that the mixed alkali liquor composition in the described alkali groove is: 5g/L NaOH, 20g/L Na
3PO
4With 20g/L Na
2CO
3The composition of mix acid liquor is in the described acid tank: 600 g/L mass concentrations are 85% H
3PO
4, 400 g/L mass concentrations are 98% H
2SO
4, 3g/L Na
2CO
3The prescription of described dedust tank liquor is: 90 g/L mass concentrations are 98% H
2SO
4, 15 ~ 30 g/L NaF and 50 g/L mass concentrations are 68% HNO
3
3. a kind of preparation method that the high silicon wrought aluminium alloy of magnesium surface color electrophoresis is filmed that contains according to claim 1, it is characterized in that described dyestuff selects the blue or green orchid of phthalein, middle Huang or bright red for use, Huang and phthalocyanine blue are according to weight ratio 4:1 perhaps, middle yellow and bright red according to weight ratio 3:2, phthalocyanine blue mixes according to weight ratio 14:1 or 1:1 with bright red, and described dispersion agent is a polyvinylpyrrolidone.
4. a kind of preparation method that the high silicon wrought aluminium alloy of magnesium surface color electrophoresis is filmed that contains according to claim 1 is characterized in that described kind contains the high silicon wrought aluminium alloy of magnesium silicon content and reaches 10-15wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102134011A CN102268716A (en) | 2011-07-28 | 2011-07-28 | Preparation method of colored electrophoretic coating on surface of magnesium-containing high-silicon wrought aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102134011A CN102268716A (en) | 2011-07-28 | 2011-07-28 | Preparation method of colored electrophoretic coating on surface of magnesium-containing high-silicon wrought aluminum alloy |
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| CN103352245A (en) * | 2013-06-26 | 2013-10-16 | 王维 | Colouring process for integrated suspended ceiling aluminium pinch plate |
| CN103556206A (en) * | 2013-08-08 | 2014-02-05 | 广东银一百创新铝业有限公司 | New aluminum black pearl color electrophoresis coloring process |
| CN103820835A (en) * | 2013-11-12 | 2014-05-28 | 浙江卓逸铝业有限公司 | Color electrophoretic coating process of aluminum alloy sections |
| CN104151968A (en) * | 2014-08-13 | 2014-11-19 | 经阁铝业科技股份有限公司 | Colored water-soluble electro-fluorine paint and production process thereof |
| WO2015021771A1 (en) * | 2013-08-15 | 2015-02-19 | 嘉兴兴禾汽车零部件有限公司 | Hole sealing method with anodic oxidation for aluminium or aluminium alloy component for vehicle |
| CN104589760A (en) * | 2015-01-20 | 2015-05-06 | 广东坚美铝型材厂（集团）有限公司 | Aluminum alloy section and manufacturing method thereof |
| CN104674323A (en) * | 2015-03-17 | 2015-06-03 | 深圳市鑫王牌科技发展有限公司 | Electrophoretic color filling process |
| CN106245090A (en) * | 2016-09-11 | 2016-12-21 | 经阁铝业科技股份有限公司 | A kind of production method of technicolo fluorine aluminium alloy extrusions |
| CN108486635A (en) * | 2018-03-23 | 2018-09-04 | 佛山市斯芬克斯贸易有限公司 | Aluminium shape surface transparent color water paint electrophoresis process |
| CN109652792A (en) * | 2019-01-21 | 2019-04-19 | 谢军 | A kind of production method of aluminum alloy decorating part |
| CN111235618A (en) * | 2020-01-16 | 2020-06-05 | 长沙鼎日成金属表面处理有限公司 | Anodic oxidation electrophoresis process for high-silicon high-copper aluminum alloy parts |
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| CN103352245A (en) * | 2013-06-26 | 2013-10-16 | 王维 | Colouring process for integrated suspended ceiling aluminium pinch plate |
| CN103352245B (en) * | 2013-06-26 | 2016-01-13 | 王维 | A kind of coloring process of Integral ceiling aluminum-pinch |
| CN103556206A (en) * | 2013-08-08 | 2014-02-05 | 广东银一百创新铝业有限公司 | New aluminum black pearl color electrophoresis coloring process |
| CN103556206B (en) * | 2013-08-08 | 2015-11-25 | 广东银一百创新铝业有限公司 | A kind of aluminum black pearl color electrophoresis colour novel process |
| WO2015021771A1 (en) * | 2013-08-15 | 2015-02-19 | 嘉兴兴禾汽车零部件有限公司 | Hole sealing method with anodic oxidation for aluminium or aluminium alloy component for vehicle |
| US9771663B2 (en) | 2013-08-15 | 2017-09-26 | Jiaxing Xinghe Automotive Parts Co., Ltd. | Anodization sealing process for an aluminum or aluminum alloy element for vehicles |
| CN103820835B (en) * | 2013-11-12 | 2017-04-19 | 浙江卓逸铝业有限公司 | Color electrophoretic coating process of aluminum alloy sections |
| CN103820835A (en) * | 2013-11-12 | 2014-05-28 | 浙江卓逸铝业有限公司 | Color electrophoretic coating process of aluminum alloy sections |
| CN104151968A (en) * | 2014-08-13 | 2014-11-19 | 经阁铝业科技股份有限公司 | Colored water-soluble electro-fluorine paint and production process thereof |
| CN104589760A (en) * | 2015-01-20 | 2015-05-06 | 广东坚美铝型材厂（集团）有限公司 | Aluminum alloy section and manufacturing method thereof |
| CN104589760B (en) * | 2015-01-20 | 2017-05-31 | 广东坚美铝型材厂（集团）有限公司 | A kind of aluminium alloy extrusions and its manufacture method |
| CN104674323B (en) * | 2015-03-17 | 2017-03-01 | 深圳市鑫王牌科技发展有限公司 | A kind of electrophoresis colors in technique |
| CN104674323A (en) * | 2015-03-17 | 2015-06-03 | 深圳市鑫王牌科技发展有限公司 | Electrophoretic color filling process |
| CN106245090A (en) * | 2016-09-11 | 2016-12-21 | 经阁铝业科技股份有限公司 | A kind of production method of technicolo fluorine aluminium alloy extrusions |
| CN108486635A (en) * | 2018-03-23 | 2018-09-04 | 佛山市斯芬克斯贸易有限公司 | Aluminium shape surface transparent color water paint electrophoresis process |
| CN109652792A (en) * | 2019-01-21 | 2019-04-19 | 谢军 | A kind of production method of aluminum alloy decorating part |
| CN111235618A (en) * | 2020-01-16 | 2020-06-05 | 长沙鼎日成金属表面处理有限公司 | Anodic oxidation electrophoresis process for high-silicon high-copper aluminum alloy parts |
| CN111235618B (en) * | 2020-01-16 | 2021-10-29 | 长沙鼎日成金属表面处理有限公司 | Anodic oxidation electrophoresis process for high-silicon high-copper aluminum alloy parts |
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Application publication date: 20111207 |