CN101634042A - Method for processing superhard aluminum alloy oxide film - Google Patents
Method for processing superhard aluminum alloy oxide film Download PDFInfo
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- CN101634042A CN101634042A CN200910183890A CN200910183890A CN101634042A CN 101634042 A CN101634042 A CN 101634042A CN 200910183890 A CN200910183890 A CN 200910183890A CN 200910183890 A CN200910183890 A CN 200910183890A CN 101634042 A CN101634042 A CN 101634042A
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Abstract
The invention relates to a method for processing a superhard aluminum alloy oxide film, which is characterized by comprising the following technical steps: binding an aluminum alloy section bar on a conducting rod and hanging the aluminum alloy section bar in a degreasing groove to carry out degreasing processing at room temperature; after the aluminum alloy section bar carries out degreasing processing, washing; hanging the washed aluminum alloy section bar in an alkali washing groove to carry out alkali washing; after the aluminum alloy section bar carries out the alkali washing, hanging the aluminum alloy section bar into a neutralization groove to carry out neutralization processing; washing the aluminum alloy section bar after neutralization processing by water; after the aluminum alloy section bar is washed by the water, hanging the aluminum alloy section bar into an oxidation groove to carry out anode oxidation processing; washing the aluminum alloy section bar after the anode oxidation processing by water; after the aluminum alloy section bar is washed by the water, hanging the aluminum alloy section bar into a hole seal groove to carry out hole seal processing; and after the aluminum alloy section bar carries out the hole seal processing, carrying out drying processing by a steam pipeline to form a finished product. The invention can improve the hardness, the abrasive resistance and the corrosion resistance of the oxide film and lead properties of the oxide film to achieve the following requirements: the microhardness is larger than or equal to 1,000HV; the abrasive resistance is tested by a method of GB/T8013.1-2007, and the abrasive loss does not exceed 10 mg; and the salt fog test resistance is tested by a method of GB/T12967.3 and reaches the ninth grade.
Description
Technical field
The present invention relates to a kind of treatment process of superhard aluminum alloy oxide film, belong to the non-ferrous metal technical field of surface.
Background technology
Flourish along with aluminium processing industry, aluminium alloy anode oxide has become one of aluminium alloy section surface processing mode.Anode oxide film is not only wear-resisting, anti-corrosion, weather, and can above various beauties and chromatic colour, thereby the using value of aluminium section bar is greatly improved.And the every performance of properties of oxide-film meets the GB5237 standard at present, work-ing life is about 20 years, but this does not often satisfy requirement of client, and the customer requirement aluminium section bar takes 80 years even higher work-ing life, and this requirement to Process on Aluminum Alloy Oxidation Film is had higher requirement.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, can improve oxide film hardness thereby provide a kind of, wear resistance, erosion resistance, and can satisfy the treatment process of the superhard aluminum alloy oxide film of customer requirement.
According to technical scheme provided by the invention, a kind of treatment process of superhard aluminum alloy oxide film, adopt following processing step:
1, dress hang, degreasing process: aluminium alloy extrusions tied up hang in degreasing tank at room temperature carry out skimming treatment on conducting rod, waste sulfuric acid solution concentration is in the degreasing tank: 80～150g/L; Treatment time is: 5～15 minutes;
2, washing, caustic wash process: wash after the aluminium alloy extrusions skimming treatment; Washed aluminum alloy section hangs in carries out alkali cleaning in the alkaline bath; Concentration of sodium hydroxide solution is in the alkaline bath: 40～90g/L, and the alkali cleaning temperature is: 30～80 ℃, the alkali cleaning time is: 2～5 minutes;
3, washing, neutralizing treatment operation: the aluminium alloy extrusions after the alkali cleaning is washed again; Hang in neutralizing well after the washing and at room temperature carry out neutralizing treatment, the treatment time is: 3～5 minutes; Salpeter solution concentration is in the neutralizing well: 100～150g/L;
4, washing, anodic oxidation treatment operation: the aluminium alloy extrusions after neutralizing treatment is washed again; Hang in oxidation trough after the washing and adopt direct current sulfuric acid process anodic oxidation treatment, sulphuric acid soln concentration is in the oxidation trough: 150～180g/L, oxidation temperature is: 14～16 ℃, current density is: 1.0～2.5A/dm
2, voltage is: 12～20V; Treatment time is: 25～45 minutes; Oxide thickness is: 10～15 μ m;
5, washing, sealing of hole treatment process: the aluminium alloy extrusions after the anodic oxidation treatment is washed again; Hang in the sealing of hole groove after the washing and carry out the sealing of hole processing; Nickel ion concentration is in the liquor of hole-sealing tank: 0.8～1.3g/L, and fluorinion concentration is: 0.4～0.8g/L, pH value is in the tank liquor: 5.5～6.5, the sealing of hole treatment temp is: 25～35 ℃, the sealing of hole treatment time is: 8～30 minutes;
6, washing, oven dry treatment process: the aluminium alloy extrusions after sealing of hole is handled is washed again; The washing back is dried with steam-pipe and is treated to finished product, and the oven dry treatment temp is: 75～85 ℃; The oven dry treatment time is: 25～35 minutes.
Tank liquor configuration in the described degreasing tank: 1 ton of water adds 25～60 kilograms of sulfur waste acid.
Tank liquor configuration in the described alkaline bath: 1 ton of water adds 80～90 kilograms of sheet alkali.
Tank liquor configuration in the described neutralizing well: 1 ton of water adds 30～50 kilograms of nitric acid.
Tank liquor configuration in the described oxidation trough: 1 ton of water adds 8～10 kilograms of sulfuric acid (technical pure).
Tank liquor preparation in the described sealing of hole groove: 1 ton of water adds 4～5 kilograms of hole sealing agents.
Tap water is adopted in washing in each operation described in the present invention, all washings at room temperature, and the washing time is: 1～2 minute.
Compared with the prior art the present invention has the following advantages:
The present invention can improve oxide film hardness, wear resistance, and erosion resistance makes properties of oxide-film reach following requirement: microhardness 〉=1000HV, wear resistance: adopt the GB/T8013.1-2007 method test, the abrasion loss is no more than 10mg; The salt-fog resistant test performance adopts the GB/T12967.3 method test, reaches 9 grades.
Embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
Embodiment one: the treatment process of a kind of superhard aluminum alloy oxide film of the present invention, adopt following processing step:
The present invention serves as to produce starting material with the 6063T5 aluminium alloy extrusions, and section bar numbering JX18-512A ties up aluminium section bar on conducting rod, guarantees that conduction is good.Produce in batches, enter degreasing tank after slinging with driving, add 30 kilograms of sulfur waste acid in the interior 35 tons of water of degreasing tank and be mixed with tank liquor, make waste sulfuric acid solution concentration be: 85g/L is immersed in section bar in the solution fully; The skimming treatment temperature is: 21 ℃, the skimming treatment time is: 12 minutes.Wash after the skimming treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
The washing back hangs in alkaline bath with driving, add sheet alkali in the interior 35 tons of water of alkaline bath and be mixed with tank liquor for 3 tons, make concentration of sodium hydroxide solution be: 60g/L, the alkali cleaning temperature is: 60 ℃, the alkali cleaning time is: be 5 minutes, wash after the alkali cleaning, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in neutralizing well after the washing and carry out neutralizing treatment, 35 tons of water in the neutralizing well add nitric acid and are mixed with tank liquor for 110 kilograms, and salpeter solution concentration is 105g/L, the neutralizing treatment temperature: 21 ℃ of room temperatures, the neutralizing treatment time is: 3 minutes.Wash after the neutralizing treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in oxidation trough after the washing, adopt the anodic oxidation of direct current sulfuric acid process, 35 tons of water in the oxide thickness 10 μ m, oxidation trough add sulfuric acid and are mixed with tank liquor for 300 kilograms, and sulphuric acid soln concentration is: 155g/L, 14.5 ℃ of anodic oxidation temperature, current density 1.5A/dm
2, voltage 15V, the time is according to calculating 25 minutes; Wash after the direct current sulfuric acid process anodic oxidation treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Carry out sealing of hole after the washing and handle, 35 tons of water in the sealing of hole groove add hole sealing agent and are mixed with tank liquor for 150 kilograms; the hole sealing agent model is LSF-86 (manufacturer is a Wuhan material protection institute); its major ingredient is a nickelous fluoride, makes nickel ion concentration be: 0.95g/L, and fluorinion concentration is: 0.56g/L; tank liquor pH value 5.9; the sealing of hole treatment temp is: 28 ℃, the sealing of hole treatment time is: 12 minutes, and the sealing of hole after washing; at room temperature wash with tap water, the washing time is: 1～2 minute.
The treatment time with the steam-pipe oven dry, is dried: 30 minutes in the washing back under 85 ℃ of conditions; Process on Aluminum Alloy Oxidation Film microhardness through the oxidation of this kind method can reach 1000HV.
Embodiment two: the treatment process of a kind of superhard aluminum alloy oxide film of the present invention, adopt following processing step:
The present invention serves as to produce starting material with 6063T5 aluminium alloy extrusions (model number JX18-553), and aluminium section bar is tied up on conducting rod, guarantees that conduction is good.Enter degreasing tank after slinging with driving, 35 tons of water in the degreasing tank add sulfur waste acid and are mixed with tank liquor for 50 kilograms, and waste sulfuric acid solution concentration is: 100g/L.Skimming temp is: 25 ℃, degreasing time is: 7 minutes.Wash after the skimming treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in alkaline bath after the washing, 35 tons of water in the alkaline bath add sheet alkali and are mixed with tank liquor for 3 tons, and concentration of sodium hydroxide solution is: 60g/L, the alkali cleaning temperature is: 63 ℃, the alkali cleaning time is: 2 minutes.Wash after the alkali cleaning, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in neutralizing well after the washing, add 100 kilograms in nitric acid in 35 tons of water in the groove, salpeter solution concentration is 130g/L, and neutral temperature is: 20 ℃, in and the time be: 6 minutes.Wash after the neutralizing treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in oxidation trough after the washing, 35 tons of water in the oxidation trough add sulfuric acid and are mixed with tank liquor for 310 kilograms, adopt the anodic oxidation of direct current sulfuric acid process, oxide thickness 12 μ m, and sulphuric acid soln concentration is: 150g/L, the anodic oxidation temperature is: 15 ℃, current density 1.6A/dm
2, voltage 15V, the time is according to calculating 30 minutes; Wash after the direct current sulfuric acid process anodic oxidation treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Carrying out sealing of hole after the washing handles; 35 tons of water hole sealing agents addings are mixed with tank liquor for 140 kilograms in the groove; the hole sealing agent model is LSF-86 (manufacturer is a Wuhan material protection institute); its major ingredient is a nickelous fluoride; nickel ion concentration is: 1.15g/L, and fluorinion concentration is: 0.5g/L, pH value 6.4; the sealing of hole treatment temp is: 32 ℃, the sealing of hole treatment time is: 18 minutes.The sealing of hole after washing is at room temperature washed with tap water, and the washing time is: 1～2 minute.
The treatment time with the steam-pipe oven dry, is dried: 30 minutes in the washing back under 80 ℃ of conditions; Process on Aluminum Alloy Oxidation Film microhardness through the oxidation of this kind method can reach 1000HV.
Embodiment three: the treatment process of a kind of superhard aluminum alloy oxide film of the present invention, adopt following processing step:
The present invention serves as to produce starting material with 6063T5 aluminium alloy extrusions (model number JX18-535), and aluminium section bar is tied up on conducting rod, guarantees that conduction is good.Enter degreasing tank after slinging with driving, 35 tons of water in the degreasing tank add sulfur waste acid and are mixed with tank liquor for 35 kilograms, and waste sulfuric acid solution concentration is: 120g/L.Skimming temp is: 25 ℃, degreasing time is: 8 minutes.Wash after the skimming treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in alkaline bath after the washing, 35 tons of water in the alkaline bath add sheet alkali and are mixed with tank liquor for 3.1 tons, and concentration of sodium hydroxide solution is: 185g/L, the alkali cleaning temperature is: 65 ℃, the alkali cleaning time is: 3.5 minutes.Wash after the alkali cleaning, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in neutralizing well after the washing, 35 tons of water in the groove add nitric acid and are mixed with tank liquor for 140 kilograms, and salpeter solution concentration is 120g/L, and neutral temperature is: 25 ℃, in and the time be: 6 minutes.Wash after the neutralizing treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Hang in oxidation trough after the washing, 35 tons of water add sulfuric acid and are mixed with tank liquor for 300 kilograms, adopt the anodic oxidation of direct current sulfuric acid process, oxide thickness 15 μ m, and sulphuric acid soln concentration is: 160g/L, the anodic oxidation temperature is: 16 ℃, current density 1.6A/dm
2, voltage 15V, the time is according to calculating 45 minutes; Wash after the direct current sulfuric acid process anodic oxidation treatment, at room temperature wash with tap water, the washing time is: 1～2 minute.
Carrying out sealing of hole after the washing handles; 35 tons of water in the groove; add hole sealing agent and be mixed with tank liquor for 145 kilograms; the hole sealing agent model is LSF-86 (manufacturer is a Wuhan material protection institute), and its major ingredient is a nickelous fluoride, and nickel ion concentration is: 1.15g/L; fluorinion concentration is: 0.5g/L; tank liquor pH value 6.4, the sealing of hole temperature is: 32 ℃, the sealing of hole time is: 18 minutes.The sealing of hole after washing is at room temperature washed with tap water, and the washing time is: 1～2 minute.
With the steam-pipe oven dry, the oven dry treatment time is: 30 minutes under 80 ℃ of conditions in the washing back; Process on Aluminum Alloy Oxidation Film microhardness through the oxidation of this kind method can reach 1000HV.
Claims (2)
1, a kind of treatment process of superhard aluminum alloy oxide film is characterized in that: adopt following processing step:
(1), dress hangs, degreasing process: aluminium alloy extrusions is tied up hung in degreasing tank at room temperature carry out skimming treatment on conducting rod, waste sulfuric acid solution concentration is in the degreasing tank: 80～150g/L; Treatment time is: 5～15 minutes;
(2), washing, caustic wash process: wash after the aluminium alloy extrusions skimming treatment; Washed aluminum alloy section hangs in carries out alkali cleaning in the alkaline bath; Concentration of sodium hydroxide solution is in the alkaline bath: 4O～90g/L, and the alkali cleaning temperature is: 30～80 ℃, the alkali cleaning time is: 2～5 minutes;
(3), washing, neutralizing treatment operation: the aluminium alloy extrusions after the alkali cleaning is washed again; Hang in neutralizing well after the washing and at room temperature carry out neutralizing treatment, the treatment time is: 3～5 minutes; Salpeter solution concentration is in the neutralizing well: 100～150g/L;
(4), washing, anodic oxidation treatment operation: the aluminium alloy extrusions after neutralizing treatment is washed again; Hang in oxidation trough after the washing and adopt direct current sulfuric acid process anodic oxidation treatment, sulphuric acid soln concentration is in the oxidation trough: 150～180g/L, oxidation temperature is: 14～16 ℃, current density is: 1.0～2.5A/dm
2, voltage is: 12～20V; Treatment time is: 25～45 minutes; Oxide thickness is: 10～15 μ m;
(5), washing, sealing of hole treatment process: the aluminium alloy extrusions after the anodic oxidation treatment is washed again; Hang in the sealing of hole groove after the washing and carry out the sealing of hole processing; Nickel ion concentration is in the liquor of hole-sealing tank: 0.8～1.3g/L, and fluorinion concentration is: 0.4～0.8g/L, pH value is: 5.5～6.5, the sealing of hole treatment temp is: 25～35 ℃, the sealing of hole treatment time is: 8～30 minutes;
(6), washing, oven dry treatment process: the aluminium alloy extrusions after sealing of hole is handled is washed again; The washing back is dried with steam-pipe and is treated to finished product, and the oven dry treatment temp is: 75～85 ℃; The oven dry treatment time is: 25～35 minutes.
2, the treatment process of a kind of superhard aluminum alloy oxide film according to claim 1 is characterized in that described washing adopts tap water at room temperature to wash, and the washing time is: 1～2 minute.
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| CN102321904A (en) * | 2011-08-25 | 2012-01-18 | 东北大学 | Mixed acid anodizing and hole sealing method of magnesium-containing high-silicon-content wrought aluminum alloy surface |
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