CN101220495B - Method for processing multiple anodization surface of light metal products - Google Patents
Method for processing multiple anodization surface of light metal products Download PDFInfo
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- CN101220495B CN101220495B CN2007100501306A CN200710050130A CN101220495B CN 101220495 B CN101220495 B CN 101220495B CN 2007100501306 A CN2007100501306 A CN 2007100501306A CN 200710050130 A CN200710050130 A CN 200710050130A CN 101220495 B CN101220495 B CN 101220495B
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Abstract
The invention discloses a method for processing various anodized surfaces of different properties on light metal products. The method comprises the following steps: (1) when machining the light metal product, various anodized surfaces are divided, and the physical dimension of corrosion resistant anodized surfaces is processed to be in accord with requirements, and processing volume is reserved on other surfaces; (2) the product is done with corrosion resistant anodization, and then is arranged in insulating sealing liquid to be sealed, and an insulating sealing layer is formed on the surface; (3) the physical dimension of another anodized surface of the machining light metal product is processed to be in accord with requirements; (4) another anodized processing is done on the product, which is arranged in the corresponding insulating liquid to be sealed, forming an insulating sealing layer on the surface; going on processing like this until all the surfaces are processed. The insulating sealing liquid is engine oil. The method has the advantages of ensuring accurate boundary among various anodized surfaces and avoiding the crisscross among the surfaces.
Description
Technical field
The present invention relates to light metal product surface anodic process, relate in particular to the method for the multiple different properties anodized surface of processing on these goods.
Background technology
Light metal such as aluminium and alloy thereof goods by anodizing, can improve its surface property, for example, handle by acidic solution, improve the solidity to corrosion on surface; By painted processing, strengthen surface decoration effect; By the hard processing, improve the wear resistance on surface, according to the purposes of light metal goods, select wherein a kind of treatment process, obtain the surface of respective performances.But, some particular product, the use properties difference of the different sites that it is surperficial, for example, many parts of aircraft, its part surface requires high to solidity to corrosion, another part surface then requires high to wear resistance, this just need carry out twice anodizing, and sulfur acid anodizing is carried out on the surface that the protection against corrosion requirement is arranged, and will carry out hard anodized to the surface that has wear resistance to require and handle.To this particular requirement on the part, ordinary method is: break insulation paste earlier on the surface of need hard anodized, remaining surface is carried out sulfur acid anodizing and is handled; Remove then and need the lip-deep insulation paste of hard anodized, again insulation paste is broken on the surface behind the sulfur acid anodizing, carry out hard anodized.This method is when part shape is uncomplicated, unexpectedly the pipe trouble can also be operated, but to complex-shaped part, the boundary line on two kinds of surfaces is irregular, crooked, tortuous, play the insulation paste manual operations, difficulty is very big, in case the boundary line of insulation paste is inaccurate, the super area of a kind of anodized surface, another kind of anodized surface is imperfect, causes part to be scrapped.
In addition, anodizing itself just has two procedures, i.e. the aftertreatment of surface anodization operation, anodized surface (sealing) operation, repeatedly use insulation paste more repeatedly, operation is too many, operates loaded down with trivial details, time-consuming, inefficiency also makes anodized cost high.
Summary of the invention
Purpose of the present invention provides a kind of method of processing multiple different properties anodized surface on the light metal goods, and this method can accurately be divided the boundary of various anodized surface, guarantees that goods processing is qualified; High efficiency is finished in sealing, insulation at a procedure; Reduce and use insulation paste, cut down finished cost.
The technical scheme that realizes above-mentioned purpose is:
A kind of method of processing multiple different properties anodized surface on the light metal goods comprises step:
(1). when machining light metal goods, mark off various anodized surface, the geometrical dimension on the anodized surface of solidity to corrosion wherein is machined to meets the requirements, remaining surface is reserved amount of finish;
(2). goods are carried out the solidity to corrosion anodizing, and its aftertreatment places the insulativity confining liquid to seal, and forms the insulativity sealer coat on the surface;
(3). the another kind of anodized surface of machining light metal goods meets the requirements its geometrical dimension;
(4). goods are carried out another kind of anodizing again, and its aftertreatment places corresponding dielectric sealing sealing, forms the insulativity sealer coat on the surface;
The rest may be inferred, until processing all surface.
Described anodized surface comprises solidity to corrosion surface, wear resistance surface, decorative surface.
The anodized insulativity confining liquid of described solidity to corrosion is a machine oil.
The anodizing method on described solidity to corrosion surface comprises step:
(1). behind light metal goods sulfur acid anodizing, place filling liquid to fill;
(2). taking-up dries up with pressurized air;
(3). be heated to 80～120 ℃, be incubated 5～10 minutes;
(4). place oil to seal, the oil temperature: 160～170 ℃, the time: 25～30 minutes.
Described filling liquid is dichromate (sodium dichromate 99, potassium an etc.) solution, concentration: 40～55g/L; Temperature: 90～100 ℃; Filling time: 15～20 minutes.
Described filling liquid is water also, temperature: 90～100 ℃, and the filling time: 15～25 minutes.
Described filling liquid is matching stain also, concentration: 0.5～10g/L, and temperature: 12～65 ℃, the filling time: 10～20 minutes.
The anodizing method on described wear resistance surface comprises step:
1). this machining surface is worked into size;
2). place oil to seal in goods, the oil temperature: 160～170 ℃, the time: 25～30 minutes;
3). remove the oil of product surface;
4). goods are placed nitric acid, make the surface-brightening that needs hard anodized; Concentration of nitric acid: 400～500g/L; Temperature: room temperature; 0.5～1 minute time;
5). place sulfuric acid to carry out hard anodized in goods; Sulfuric acid concentration: 200～350g/L, temperature: 0～-6 ℃, electric current: 2～3.5A/dm
2, the time presses thicknesses of layers and decides.
The anodizing method of described decorative surface comprises step:
1.. this machining surface is worked into size;
2.. behind light metal goods sulfur acid anodizing, with dye coloring or electrolytic coloring;
3.. place oil to seal, the oil temperature: 160～170 ℃, the time: 25～30 minutes
4.. remove the oil of product surface;
5.. goods are placed nitric acid, and making needs ornamental anodized surface-brightening; Concentration of nitric acid: 400～500g/L; Temperature: room temperature; 0.5～1 minute time;
6.. place chromic acid to carry out ornamental anodizing in goods; Chromic acid concentration: 50～100g/L; Temperature: 33～37 ℃; Voltage: 40V; 35～40 minutes time.
Useful technique effect of the present invention:
Can mark off the boundary of various different properties anodized surface exactly, guarantee that goods processing is qualified; Sealing, insulation are finished at a procedure, and easy and simple to handle, high efficiency has reduced tooling cost.
Embodiment
When machining light metal goods, mark off various anodized surface, a kind of geometrical dimension of surface wherein is machined to meets the requirements, remaining surface is reserved amount of finish.Goods are carried out a kind of anodizing, and its aftertreatment places the insulativity confining liquid to seal, and forms the insulativity sealer coat on the surface.The another kind of anodized surface of machining light metal goods meets the requirements its geometrical dimension again, and goods are carried out another kind of anodizing, and its aftertreatment places the insulativity confining liquid to seal, and forms the insulativity sealer coat on the surface; The rest may be inferred, until processing all surface.
When different surfaces will carry out anodizing of different nature on the part, process sequence was: solidity to corrosion anodizing, wear resistance anodizing, ornamental anodizing, or solidity to corrosion anodizing, ornamental anodizing, wear resistance anodizing.In a word, must carry out the solidity to corrosion anodizing earlier, carry out other anodizing then.The two kinds of anodized orders in back are to concern according to the shape of part and position to arrange.
The complete processing of various anodized surface is respectively described below:
One. the complete processing of solidity to corrosion anodized surface
Place sodium dichromate 99 (or potassium bichromate) solution to fill in goods, strength of solution 40～55g/L, technical grade, pH value 4.5～6.5,90～100 ℃ of temperature, 15～20 minutes filling times; Taking out drying, is to accelerate rate of drying, and available pressurized air dries up, and goods is heated to 90～110 ℃ again, is incubated 5～10 minutes, and heating medium preferably adopts hot blast, to keep surface cleaning; Place machine oil to seal then, 165 ± 5 ℃ of oil temperature, 25～30 minutes time.
Two. the complete processing of wear resistance anodized surface
The solidity to corrosion top layer that this is surperficial grinds away, and to size, places oil to seal in goods, 165 ± 5 ℃ of oil temperature, 25～30 minutes time.Remove the oil of product surface, wherein, need carry out the anodized surface degreasing of wear resistance must be thoroughly, this surface is stained with gasoline with soft cloth or degreasing cotton and is carried out wiping repeatedly, carry out wiping with clean calico or white filter paper again, above without any till the stain, otherwise repeat as stated above again, up to qualified.Remaining surface is stained with gasoline with soft cloth or degreasing cotton and is carried out most of oily the getting final product of wiping removal piece surface.Then need are carried out the anodized surperficial bright dipping of wear resistance, concrete grammar is: goods are placed nitric acid, concentration of nitric acid: 400～500g/L; Temperature: room temperature; 0.5～1 minute time; Make the surface-brightening that needs hard anodized.Place sulfuric acid to carry out hard anodized in goods at last, its sulfuric acid concentration 200～350g/L, temperature 0～-6 ℃, electric current 2～3.5A/dm
2, the time presses thicknesses of layers and decides.For example, the material of goods rete selects LY
12(No. 12 duralumin), thicknesses of layers 50～60 μ m are at sulfuric acid concentration 300～350g/L, temperature-3～-5 ℃, voltage 55～60V, current density 3A/dm
2, carry out under 55～65 minutes the condition of oxidization time.
Three. the complete processing of ornamental anodized surface
This corrosion resistance of surface top layer is ground away, and to size, with light metal goods sulfur acid anodizing after stain, coloring process can be used the organic or inorganic dye coloring, or electrolytic coloring then,, select coloring process according to the service requirements of product.Place oil to seal in goods again, 165 ± 5 ℃ of oil temperature, 25～30 minutes time.Oil removing then, bright dipping, method is identical with above-mentioned wear resistance anodized surface.Place chromic acid to carry out anodizing in goods at last, chromic acid concentration 50～100g/L; 35 ± 2 ℃ of temperature, voltage 40V, 35～40 minutes time.
The machine oil that above-mentioned each example sealing is used is preferably selected HL-30 gear oil or HG-52 superheated steam cylinder oil for use.Sealer coat with machine oil handle to form has good insulating property, and in the time of can guaranteeing to process another kind of anodized surface, the anodized surface that has processed is unaffected.
With the method for the various anodized surface of gradation machining, can guarantee that the boundary of various anodized surface is accurate, not staggered mutually, various surfaces are complete.
Process after all anodized surface, goods are washed with water totally, surface degreasing dries up, and can pack warehouse-in.
Claims (6)
- One kind on the light metal goods processing multiple different properties anodized surface method, described anodized surface comprises solidity to corrosion surface, wear resistance surface, decorative surface; This working method comprises step:(1). when machining light metal goods, mark off various anodized surface, the geometrical dimension on the anodized surface of solidity to corrosion wherein is machined to meets the requirements, remaining surface is reserved amount of finish;(2). goods are carried out the solidity to corrosion anodizing, and its aftertreatment places the insulativity confining liquid to seal, and forms the insulativity sealer coat on the surface;(3). the wear resistance surface or the decorative surface of machining light metal goods, remove this surperficial insulativity sealer coat, and its geometrical dimension is met the requirements;(4). goods are carried out wear resistance or decorative surface anodizing, and its aftertreatment places corresponding dielectric to seal, and forms the insulativity sealer coat on the surface;The rest may be inferred, until processing all surface.
- 2. method according to claim 1 is characterized in that: the anodized insulativity confining liquid of described solidity to corrosion is a machine oil.
- 3. method according to claim 1 is characterized in that: the anodizing method on described solidity to corrosion surface comprises step(1). behind light metal goods sulfur acid anodizing, place filling liquid to fill;(2). taking-up dries up with pressurized air;(3). be heated to 80～120 ℃, be incubated 5～10 minutes;(4). place oil to seal, the oil temperature: 160～170 ℃, the time: 25～30 minutes.
- 4. method according to claim 3 is characterized in that:Described filling liquid is a dichromate solution, concentration: 40～55g/L, and temperature: 90～100 ℃, the filling time: 15～20 minutes; OrDescribed filling liquid is a water, temperature: 90～100 ℃, and the filling time: 15～25 minutes: orDescribed filling liquid is a matching stain, concentration: 0.5～10g/L, and temperature: 12～65 ℃, the filling time: 10～20 minutes.
- 5. method according to claim 1 is characterized in that: the anodizing method on described wear resistance surface comprises step1). with this machining surface processing, remove the rearmounted insulativity sealer coat of handling formation of solidity to corrosion or ornamental anodizing, and this surperficial geometrical dimension is met the requirements;2). place oil to seal in goods, oil temperature: 160～170 ℃; Time: 25～30 minutes;3). remove the oil of product surface;4). goods are placed nitric acid, make the surface-brightening that needs hard anodized; Concentration of nitric acid: 400～500g/L; Temperature: room temperature; 1～2 minute time;5). place sulfuric acid to carry out hard anodized in goods; Sulfuric acid concentration: 200～350g/L, temperature: 0～-6 ℃, electric current: 2～3.5A/dm 2, the time presses thicknesses of layers and decides.
- 6. method according to claim 1 is characterized in that: the anodizing method of described decorative surface comprises step1.. with this machining surface processing, remove the rearmounted insulativity sealer coat of handling formation of solidity to corrosion or wear resistance anodizing, and this surperficial geometrical dimension is met the requirements;2.. behind light metal goods sulfur acid anodizing, with dye coloring or electrolytic coloring;3.. place oil to seal, the oil temperature: 160～170 ℃, the time: 25～30 minutes;4.. remove the oil of product surface;5.. goods are placed nitric acid, and making needs ornamental anodized surface-brightening; Concentration of nitric acid: 400～500g/L; Temperature: room temperature; 0.5～1 minute time;6.. place chromic acid to carry out ornamental anodizing in goods; Chromic acid concentration: 50～100g/L, temperature: 33～37 ℃, voltage: 40V, time: 35-40 minute.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102834551B (en) * | 2011-03-08 | 2015-07-01 | 纳米及先进材料研发院有限公司 | Method for producing white anodized aluminum oxide |
| CN103498177A (en) * | 2013-09-24 | 2014-01-08 | 昆山凯诺尔金属制品有限公司 | Processing method of various anodized surfaces of light metal product |
| CN104711652A (en) * | 2013-12-11 | 2015-06-17 | 贵州红林机械有限公司 | High-hardness hard anodization technology for processing hard aluminum alloy |
| CN106078120A (en) * | 2016-08-23 | 2016-11-09 | 江苏特兴通讯科技有限公司 | A kind of mobile phone camera bonnet bright technique |
| CN107937953B (en) * | 2017-12-12 | 2019-10-25 | 北京小米移动软件有限公司 | Al-alloy casing and preparation method thereof |
| CN111996524A (en) * | 2020-07-21 | 2020-11-27 | 国营芜湖机械厂 | Method for repairing damage of wear-resistant layer of aluminum alloy piston rod of airplane hydraulic system |
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| US20050109623A1 (en) * | 2003-09-10 | 2005-05-26 | Bao Sheng Corporation | Multi-color anodizing processes |
| CN101008098A (en) * | 2006-12-21 | 2007-08-01 | 上海交通大学 | Two-step electrochemical method for preparing aluminum base composite material surface protection coating |
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| US20050109623A1 (en) * | 2003-09-10 | 2005-05-26 | Bao Sheng Corporation | Multi-color anodizing processes |
| CN101008098A (en) * | 2006-12-21 | 2007-08-01 | 上海交通大学 | Two-step electrochemical method for preparing aluminum base composite material surface protection coating |
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Owner name: SICHUAN LINGFENG AERO HYDRAULIC MACHINERY CO., LTD Free format text: FORMER NAME: SICHUAN AERO HYDRAULIC MACHINERY FACTORY |
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