CN105274602A - Anti-corrosion surface treatment method based on rare-earth modified phosphoric and sulfuric acid anodizing - Google Patents
Anti-corrosion surface treatment method based on rare-earth modified phosphoric and sulfuric acid anodizing Download PDFInfo
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- CN105274602A CN105274602A CN201410325472.4A CN201410325472A CN105274602A CN 105274602 A CN105274602 A CN 105274602A CN 201410325472 A CN201410325472 A CN 201410325472A CN 105274602 A CN105274602 A CN 105274602A
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Abstract
The invention provides an anti-corrosion surface treatment method based on rare-earth modified phosphoric and sulfuric acid anodizing. The method comprises the steps that the surface of an aluminum part is subjected to pretreatment of cleaning and impurity removing, anodizing is carried out through an electrolyte solution, and hot-air blow-drying treatment is carried out. According to the formula of the electrolyte solution, the electrolyte solution comprises 40-120 g/L of sulfuric acid with the weight concentration ratio being 98%, 50-70 g/L of analytically pure phosphoric acid, 0.4-0.8 g/L of cerous sulfate, and 6-8 g/L of oxalic acid. According to the method, a rare-earth modified anode oxide film with excellent corrosion resistance and good bonding performance is prepared on the surface of the aluminum part of XX armored amphibious equipment, and the damage problems of rubber falling of bogie wheels and overall stripping of rubber layers due to bad corrosion resistance and bonding performance of aluminum alloy and rubber which are bonded under a dry-wet alternating marine environment are solved; the method has the advantages that the process is simple, time is short, efficiency is high, and the enhancement effect is obvious; the method has important military and economic significance to improving the equipment service capacity and saving maintenance cost.
Description
Technical field
The invention belongs to military equipment guard technology field, particularly relate to a kind of corrosion-protected surface treatment process based on rare earth modified phosphorus sulphuric acid anodizing.
Background technology
In prior art, the armoring amphibious equipment car body of XX in army is alumina-base material, the working condition of alternation of wetting and drying is often faced with under ocean environment, under high temperature, high humidity, high salt fog and the condition at high sunshine, the car body of this amphibious equipment and component seriously corroded, cause the problems such as maintaining and repairing work load are large, maintenance and support expense rises, vehicle trouble rate is high, reliability reduction, had a strong impact on this amphibious equipment normal operation.Wherein, this amphibious equipment aluminium alloy bogie wheel corrosion failure situation more remarkable: through sea-water corrosion, bogie wheel is bonding with rubber of serious failure, and part cushion rubber is overall from wheel disc to be peeled off.
Through army's finding display: when this amphibious equipment of certain unit travels mostly less than 600 kilometers, aluminium alloy bogie wheel just occurs the problem that adhesive tape drops in succession.Along with lasting use, bogie wheel damaged condition is serious all the more, and adhesive tape constantly peels off from bulk wheel disc, serious even overall stripping from wheel disc.Bogie wheel spoilage up to 60%, and in the bogie wheel damaged, rubber come off and overall peel off account for 78%.The manifestation that aluminium alloy bogie wheel occurs to destroy is mainly the adhesive failure between aluminium alloy wheel disc and adhesive tape, and its damage has had a strong impact on the daily workout of army and the maintenance of equipment, and the Problem of Failure of bogie wheel is urgently to be resolved hurrily.
Therefore, aluminium alloy bogie wheel that new technical scheme solves the armoring amphibious equipment of XX is badly in need of in prior art under ocean environment because of corrosion and the bad technical problem causing inefficacy of adhesiveproperties.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of corrosion-protected surface treatment process based on rare earth modified phosphorus sulphuric acid anodizing, the erosion resistance of the aluminium alloy bogie wheel that improve the armoring amphibious equipment of XX under ocean environment and adhesiveproperties.
Corrosion-protected surface treatment process based on rare earth modified phosphorus sulphuric acid anodizing of the present invention, comprises the following steps:
Step 1, carries out cleaning removal of impurities pre-treatment to aluminium workpiece surface, and this cleaning removal of impurities pre-treatment comprises: oil removing, alkaline etching, pickling polishing, hot blast drying;
Step 2, prepares the electrolytic solution of rare earth modified phosphorus-sulphuric acid anodizing, utilizes described electrolytic solution to carry out anodic oxidation treatment to through the pretreated aluminium workpiece surface of step 1:
Step 3, carries out hot blast drying process to the aluminum component after step 2 anodic oxidation treatment;
Further, the electrolyte prescription of the rare earth modified phosphorus-sulphuric acid anodizing in described step 2 is:
Weight concentration is than the H being 98%
2sO
4sulfuric acid 40-120g/L,
Analytically pure H
3pO
4phosphoric acid 50-70g/L,
Analytically pure Ce
2(SO4)
34H
2o cerous sulfate is 0.4-0.8g/L,
CH
3cOOH bis-oxalic acid hydrate is 6-8g/L.
Further, organic solvent is utilized to carry out oil removal treatment to aluminium workpiece surface in described step 1.
Acetone is adopted to be that organic solvent carries out oil removal treatment to aluminium workpiece surface in described step 1.
Further, NaOH solution is adopted to carry out alkaline etching to aluminium workpiece surface in described step 1.
Be under the condition of 25 ~ 30 DEG C in temperature in described step 1, adopt NaOH solution to carry out alkaline etching to aluminium workpiece surface, the time of alkaline etching process is 3-10 minute.
Further, in described step 1, nitric acid light-emitting solution is adopted to carry out pickling polishing to aluminium workpiece surface.
Be under the condition of 25 ~ 30 DEG C in temperature in described step 1, adopt nitric acid light-emitting solution to carry out pickling polishing to aluminium workpiece surface, the time of pickling polishing process is 3-10 minute.
Further, the condition of the anodic oxidation treatment in described step 2 is:
Anodised temperature range is 20 ~ 25 DEG C,
Power supply type is direct current/pulse voltage stabilized source,
The voltage range of this direct current/pulse voltage stabilized source is 20 ± 2V,
Anodised time range is 25-35min,
Anodised magnetic agitation rotating speed is 280-320rpm.
Further, the electrolyte prescription of the rare earth modified phosphorus-sulphuric acid anodizing in described step 2 is: sulfuric acid 120g/L, phosphoric acid 60g/L, cerous sulfate 0.4g/L, oxalic acid 7g/L.
Further, in described step 3 to the particular content that the aluminum component after step 2 anodic oxidation treatment carries out hot blast drying process be: carry out thermostatically heating with 150 ~ 200 DEG C, the time of thermostatically heating is 2-4h, seals up for safekeeping after aluminum component naturally cooling.
Beneficial effect of the present invention is:
1. the invention provides a kind of rare earth modified anodic oxidation formula, prepare excellent anti-corrosion performance, rare earth modified anode oxide film that adhesiveproperties is good.
2. the present invention by adopting prepared rare earth modified anode oxide film in the aluminum alloy surface of the armoring amphibious equipment of XX, solves aluminium alloy and rubber and be bonded under alternation of wetting and drying ocean environment by corrode the overall damage problem peeled off with rubber layer of coming unstuck with the not good enough bogie wheel caused of adhesiveproperties.
3. the corrosion-protected surface treatment process based on rare earth modified phosphorus sulphuric acid anodizing of the present invention has the advantages such as technique is simple, the time is short, efficiency is high, effect promoting is obvious, and the equipment service ability improving the armoring amphibious equipment of XX and saving maintaining cost have important military affairs and economic implications.
Accompanying drawing explanation
Fig. 1 is the corrosion-protected surface process flow figure based on rare earth modified phosphorus sulphuric acid anodizing of the present invention.
Embodiment
Corrosion-protected surface treatment process based on rare earth modified phosphorus sulphuric acid anodizing of the present invention is a kind of process for treating surface improving aluminum alloy surface erosion resistance and bonding strength, and it comprises cleaning removal of impurities pre-treatment, anodic oxidation, hot blast drying process three steps.Fig. 1 is the corrosion-protected surface process flow figure based on rare earth modified phosphorus sulphuric acid anodizing of the present invention.As shown in Figure 1, the present invention includes following content:
1. clean removal of impurities pre-treatment
(1) Solvent degreasing
Generally all greasy dirt is there is in the aluminium workpiece surface of the armoring amphibious equipment of XX in the course of processing, need before anodic oxidation, its nothing to be removed, otherwise the greasy dirt remaining in specimen surface can cause certain pollution to follow-up process, even can affect the quality of oxide film, not reach expected effect.Therefore, this patent adopts Solvent degreasing, has except speed oil is fast, easy to operate, damage the advantages such as little to test specimen.
Effect is best, is to adopt the aluminium workpiece surface of acetone to the armoring amphibious equipment of XX directly to carry out Solvent degreasing, then with deionized water washings.This patent take aluminium alloy as test piece, the effect taking acetone as Solvent degreasing is verified: test piece is immersed and is equipped with in the beaker of acetone, be placed in KQ218 Ultrasonic Cleaners ultrasonic oil removal 20min, then use washed with de-ionized water 1min, whether the moisture film shape of observing strip can keep 30s continuously, when surperficial complete wetting, there will not be water break, oil removal process is complete.
(2) alkaline etching
But Solvent degreasing is more weak for the oil removing ability of the corner of the armoring amphibious equipment aluminum component of XX, blind hole, and the greasy dirt on surface can not be removed completely.Therefore next this patent carries out alkaline etching to the armoring amphibious equipment aluminum component of XX.
Aluminum component is through alkaline etching, and the greasy dirt on its surface and oxide film just can thoroughly be removed.Alkaline etching is the thinning process of alumiaum article surface uniform, and the slight scar that original surface is left over also can alleviate, and forms the etch outward appearance of scattering of light and activate matt surface uniformly.
Effect is good, is to adopt NaOH solution 50g/L to carry out alkaline etching.This patent adopts NaOH solution to be carry out alkaline etching under the condition of 25 ~ 30 DEG C in temperature to the aluminum alloy surface of the armoring amphibious equipment of XX, and the time of alkaline etching process is 3-10 minute.
(3) pickling polishing
Adopt pickling bright dipping, the alkaline matter on alumiaum article surface can be neutralized, suppress again to be oxidized, do not participate in reacting the dust that be but adsorbed on article surface when can remove again alkaline etching simultaneously.
Conventional light-emitting solution has nitric acid light-emitting solution, sulfuric acid light-emitting solution, chromic acid light-emitting solution, nitrate acid and hydrofluoric acid to mix light-emitting solution four kinds.Effect is good, and this patent adopts nitric acid light-emitting solution 20%-25% (volume) to be carry out pickling polishing under the condition of 25 ~ 30 DEG C in temperature to the aluminum alloy surface of the armoring amphibious equipment of XX, and the time of pickling polishing process is 3-10 minute.
Nitric acid generally adopts more polishing fluid at present, is characterized in reaction evenly, speed, and nitric acid can remove the impurity that sulfuric acid polishing can not remove, and the test specimen light uniform ground after polishing, obviously can improve the surfaceness of test specimen.If when blackout, spottiness, coarse unequal phenomenon appear in pickling complete rear surface, repeat the step of alkaline etching to pickling, until aluminum alloy surface light is smooth.
(4) hot blast drying
Seal up for safekeeping for subsequent use after adopting 80 ~ 100 DEG C of hot blast dryings, for removing aluminium alloy strip liquid.
2. anodic oxidation
(1) various acid added in water during electrolyte quota, limit edged stirs.
The electrolyte prescription of the rare earth modified phosphorus-sulphuric acid anodizing of this patent is:
Weight concentration is than the H being 98%
2sO
4sulfuric acid 40-120g/L,
Analytically pure H
3pO
4phosphoric acid 50-70g/L,
Ce
2(SO4)
34H
2o cerous sulfate analytical pure is 0.4-0.8g/L,
CH
3cOOH oxalic acid (two oxalic acid hydrates) is 6-8g/L.
This patent adopts with sulfuric acid, phosphoric acid and oxalic acid as main preparation anodic oxidation electrolyte, can fully comprehensive sulfuric acid electrolyte film forming corrosion resisting property good, vesicular structure porosity is high, uniform advantage of arranging, phosphoric acid electrolyte is strong to film layer dissolves ability, become membrane pore size is large, rete adhesiveproperties is good advantage and oxalic acid to reduce electrolytic solution to the dissolving power of oxide film, the feature improving thickness limit and toughness.
Best results, the electrolyte prescription of this patent middle-weight rare earths modification phosphorus-sulphuric acid anodizing is: sulfuric acid 120g/L, phosphoric acid 60g/L, cerous sulfate 0.4g/L, oxalic acid 7g/L.
(2) anode oxidation process
Electrolyte temperature span of control is defined as 20 ~ 25 DEG C, and power supply type is chosen as direct current/pulse voltage stabilized source, and voltage range is 20 ± 2V, and anodizing time scope is 25-35min, and magnetic agitation rotating speed is 280-320rpm.
3. hot blast drying process
After anodic oxidation, 150 ~ 200 DEG C of thermostatically heating 2-4h carry out hot blast drying, seal up for safekeeping and can use after aluminum component naturally cooling.
This patent prepares corrosion resistant rare earth modified phosphorus sulphuric acid anodizing scheme on aluminum-copper alloy, aluminum alloy surface bonding strength and erosion resistance can be significantly improved, be applicable under ocean environment as the surface treatment of aluminium alloy and preconditioning technique, extend the working hour of equipment and materials, save cost, improve the cost performance of use.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (10)
1., based on a corrosion-protected surface treatment process for rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, comprising:
Step 1, carries out cleaning removal of impurities pre-treatment to aluminium workpiece surface, and this cleaning removal of impurities pre-treatment comprises: oil removing, alkaline etching, pickling polishing, hot blast drying;
Step 2, prepares the electrolytic solution of rare earth modified phosphorus-sulphuric acid anodizing, utilizes described electrolytic solution to carry out anodic oxidation treatment to through the pretreated aluminium workpiece surface of step 1:
Step 3, carries out hot blast drying process to the aluminum component after step 2 anodic oxidation treatment;
Further, the electrolyte prescription of the rare earth modified phosphorus-sulphuric acid anodizing in described step 2 is:
Weight concentration is than the H being 98%
2sO
4sulfuric acid 40-120g/L,
Analytically pure H
3pO
4phosphoric acid 50-70g/L,
Analytically pure Ce
2(SO4)
34H
2o cerous sulfate is 0.4-0.8g/L,
CH
3cOOH bis-oxalic acid hydrate is 6-8g/L.
2., as claimed in claim 1 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, in described step 1, utilize organic solvent to carry out oil removal treatment to aluminium workpiece surface.
3., as claimed in claim 2 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, in described step 1, adopt acetone to be that organic solvent carries out oil removal treatment to aluminium workpiece surface.
4., as claimed in claim 1 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, in described step 1, adopt NaOH solution to carry out alkaline etching to aluminium workpiece surface.
5. as claimed in claim 4 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, be under the condition of 25 ~ 30 DEG C in temperature in described step 1, adopt NaOH solution to carry out alkaline etching to aluminium workpiece surface, the time of alkaline etching process is 3-10 minute.
6. as claimed in claim 1 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, in described step 1, adopt nitric acid light-emitting solution to carry out pickling polishing to aluminium workpiece surface.
7. as claimed in claim 6 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, be under the condition of 25 ~ 30 DEG C in temperature in described step 1, adopt nitric acid light-emitting solution to carry out pickling polishing to aluminium workpiece surface, the time of pickling polishing process is 3-10 minute.
8., as claimed in claim 1 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, the condition of the anodic oxidation treatment in described step 2 is:
Anodised temperature range is 20 ~ 25 DEG C,
Power supply type is direct current/pulse voltage stabilized source,
The voltage range of this direct current/pulse voltage stabilized source is 20 ± 2V,
Anodised time range is 25-35min,
Anodised magnetic agitation rotating speed is 280-320rpm.
9. as claimed in claim 1 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, the electrolyte prescription of the rare earth modified phosphorus-sulphuric acid anodizing in described step 2 is: sulfuric acid 120g/L, phosphoric acid 60g/L, cerous sulfate 0.4g/L, oxalic acid 7g/L.
10. as claimed in claim 1 based on the corrosion-protected surface treatment process of rare earth modified phosphorus sulphuric acid anodizing, it is characterized in that, in described step 3 to the particular content that the aluminum component after step 2 anodic oxidation treatment carries out hot blast drying process be: carry out thermostatically heating with 150 ~ 200 DEG C, the time of thermostatically heating is 2-4h, seals up for safekeeping after aluminum component naturally cooling.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109321920A (en) * | 2018-11-27 | 2019-02-12 | 上海申和热磁电子有限公司 | A kind of strip method aoxidizing plate |
| CN109415836A (en) * | 2016-04-18 | 2019-03-01 | 福克航空结构公司 | The anode oxidation method of aluminium or its alloy product |
| CN109423675B (en) * | 2017-08-28 | 2020-11-17 | 河南平芝高压开关有限公司 | Electrolyte for pure aluminum part surface anodic oxidation and pure aluminum part surface anodic oxidation method |
| CN114108051A (en) * | 2021-12-24 | 2022-03-01 | 靖江先锋半导体科技有限公司 | Corrosion-resistant mixed acid anodic oxidation process |
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| CN1560328A (en) * | 2004-03-11 | 2005-01-05 | 上海交通大学 | Preparation process for anode oxidation thick film of aluminium copper alloy |
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| CN1560328A (en) * | 2004-03-11 | 2005-01-05 | 上海交通大学 | Preparation process for anode oxidation thick film of aluminium copper alloy |
| CN101092731A (en) * | 2007-07-25 | 2007-12-26 | 大连交通大学 | Anodic oxidation method for raising rigidity and corrosion resistance of plated aluminum on surface of metal base |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109415836A (en) * | 2016-04-18 | 2019-03-01 | 福克航空结构公司 | The anode oxidation method of aluminium or its alloy product |
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| CN109423675B (en) * | 2017-08-28 | 2020-11-17 | 河南平芝高压开关有限公司 | Electrolyte for pure aluminum part surface anodic oxidation and pure aluminum part surface anodic oxidation method |
| CN109321920A (en) * | 2018-11-27 | 2019-02-12 | 上海申和热磁电子有限公司 | A kind of strip method aoxidizing plate |
| CN114108051A (en) * | 2021-12-24 | 2022-03-01 | 靖江先锋半导体科技有限公司 | Corrosion-resistant mixed acid anodic oxidation process |
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Application publication date: 20160127 |