CN107557774A - A kind of automobile component aluminum alloy surface passivating method - Google Patents
A kind of automobile component aluminum alloy surface passivating method Download PDFInfo
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- CN107557774A CN107557774A CN201710777397.9A CN201710777397A CN107557774A CN 107557774 A CN107557774 A CN 107557774A CN 201710777397 A CN201710777397 A CN 201710777397A CN 107557774 A CN107557774 A CN 107557774A
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Abstract
The invention discloses a kind of automobile component aluminum alloy surface passivating method, it is related to aluminium alloy processing technology field, comprises the following steps：（1）Pretreatment；（2）Passivation；（3）Cleaning, drying；The present invention is using modified epoxy as coalescents; with reference to nitric acid and the passivation effect of potassium permanganate; and compound High-performance green aluminium alloy passivator is obtained after being compounded with remaining raw material; the fine and close film with network structure can be formed in aluminum alloy surface; compared with the film that conventional passivator is formed; with excellent intensity, toughness and adhesive ability; decay resistance is good; effectively it can prevent oxidized aluminum alloy from getting rusty simultaneously; significant protective effect is played to aluminium alloy, there is good economic benefit and social benefit.
Description
Technical field
The invention belongs to aluminium alloy processing technology field, and in particular to a kind of automobile component aluminum alloy surface passivation side
Method.
Background technology
The pretreatment liquid generally used in Chinese market at present is to be primarily adapted for use in the phosphating solution of steel and be primarily adapted for use in
The chromaking liquid of aluminium and aluminium alloy.
Aluminum component chromaking liquid is widely used in various industrial products surface treatments, although passivation effect is preferable, chromium
The main component chromic anhybride for changing liquid causes significant damage to the health of operator, and environment and water quality are caused seriously to pollute.
Explicitly described in the Part III of the safe practice specification (MSDS) of chromic anhybride and the 12nd part it to health and
To the harmfulness of ecological environment：Health hazard：Acute poisoning；Acute respiratory irritation, nosebleed, sound can be caused after suction
Sound is hoarse, the contracting of schneiderian membrance committee, occurs asthma and cyanosis sometimes.Chemical pneumonia can occur for severe one.It can orally stimulate and corrosion disappears
Change road, cause Nausea and vomiting, stomachache, bloody stool etc.；There is expiratory dyspnea, cyanosis, shock, hepatic lesion and acute renal in severe one
Exhaustion etc..Chronic Effect：There are contact dermatitis, chrome ulcer, rhinitis, perforation of nasal septum and respiratory inflammation etc..Fire danger：This
Product are combustion-supporting, high poison, are carcinogenic substance, tool corrosivity, excitant, human body can be caused to burn.The ecological hazard：The material has danger to environment
Evil, can pollute to water body, in mankind's important foodstuffs chain, biological accumulation particularly occurs in meat, body of shellfish.
It is one of automobile component main material, but its corrosion resistance is not because aluminium alloy has the performance of high-strength light
Good, case hardness is relatively low, it is therefore desirable to surface passivating treatment is carried out to it further to improve its combination property.
The content of the invention
The purpose of the present invention is to be directed to the problem of existing, there is provided a kind of automobile component aluminum alloy surface passivating method.
The present invention is achieved by the following technical solutions：
A kind of automobile component aluminum alloy surface passivating method, this method use passivating solution by weight by following component
It is made：Zinc nitrate 3-5, nitric acid 1-4, lanthanum chloride 0.15-0.18, Wu Luotuo 0.02-0.04, fluosilicic acid 1.18-1.22, sulfuric acid
0.3-0.5, sulfuric acid 2.5-2.8, the methene phosphine 0.1-0.3 of amino three, potassium permanganate 0.6-0.8, modified epoxy 1.5-1.8,
Deionized water 110-120；
The passivating method specifically includes following steps：
（1）Pretreatment：Aluminum alloy surface is subjected to uniform grinding, polishes, is then cleaned again with deionized water, is dried；
（2）Passivation：Passivating solution is added in deactivation slot, is preheated to 70 DEG C, 30min is incubated, then will pass through step（1）Processing
Aluminium alloy afterwards is added in deactivation slot, floods completely in passivating solution, adjusts its temperature to 65 DEG C, immersion treatment time 130-
150s；
（3）Cleaning, drying：By step（2）Aluminium alloy after middle taking-up is cleaned to neutrality, then at 80 DEG C, drying, you can.
Further, the modified epoxy preparation method is：
Under nitrogen protection, polyoxypropyleneglycol is added into reactor, after being warming up to 55 DEG C, adds epoxy resin and horse
Carry out sour di-isooctyl, adjust the temperature to 70 DEG C, react 35min, after being subsequently added into hydroxyl amino acetic acidreaction 2 hours, add third
Olefin(e) acid hydroxyl ethyl ester reacts 40min again, is then cooled to 40 DEG C, and 15min is disperseed under 2000r/min high-speed stirreds, is produced, described
Polyoxypropyleneglycol, epoxy resin, diisooctyl maleate, hydroxyl amino acetic acid, hydroxy-ethyl acrylate mass ratio are 1:50:
1:0.5:0.8。
Further, the step（1）Middle drying temperature is 105 DEG C.
Further, step（2）Middle passivating solution accounts for 2/3rds of passivation sump volume.
Further, step（3）It is middle to use deionized water or washes of absolute alcohol to neutrality.
The present invention has advantages below compared with prior art：The present invention using modified epoxy as coalescents,
Compound High-performance green aluminium alloy is obtained with reference to nitric acid and the passivation effect of potassium permanganate, and after being compounded with remaining raw material
Passivator, the fine and close film with network structure can be formed in aluminum alloy surface, compared with the film that conventional passivator is formed,
With excellent intensity, toughness and adhesive ability, decay resistance is good, while effectively can prevent oxidized aluminum alloy from getting rusty,
Significant protective effect is played to aluminium alloy, there is good economic benefit and social benefit.
Embodiment
Embodiment 1
A kind of automobile component aluminum alloy surface passivating method, this method use passivating solution by weight by following component
It is made：Zinc nitrate 3, nitric acid 1, lanthanum chloride 0.15, Wu Luotuo 0.02, fluosilicic acid 1.18, sulfuric acid 0.3, sulfuric acid 2.5, amino front three
Pitch phosphine 0.1, potassium permanganate 0.6, modified epoxy 1.5, deionized water 110；
The passivating method specifically includes following steps：
（1）Pretreatment：Aluminum alloy surface is subjected to uniform grinding, polishes, is then cleaned again with deionized water, is dried；
（2）Passivation：Passivating solution is added in deactivation slot, is preheated to 70 DEG C, 30min is incubated, then will pass through step（1）Processing
Aluminium alloy afterwards is added in deactivation slot, floods completely in passivating solution, adjusts its temperature to 65 DEG C, the immersion treatment time
130s；
（3）Cleaning, drying：By step（2）Aluminium alloy after middle taking-up is cleaned to neutrality, then at 80 DEG C, drying, you can.
Further, the modified epoxy preparation method is：
Under nitrogen protection, polyoxypropyleneglycol is added into reactor, after being warming up to 55 DEG C, adds epoxy resin and horse
Carry out sour di-isooctyl, adjust the temperature to 70 DEG C, react 35min, after being subsequently added into hydroxyl amino acetic acidreaction 2 hours, add third
Olefin(e) acid hydroxyl ethyl ester reacts 40min again, is then cooled to 40 DEG C, and 15min is disperseed under 2000r/min high-speed stirreds, is produced, described
Polyoxypropyleneglycol, epoxy resin, diisooctyl maleate, hydroxyl amino acetic acid, hydroxy-ethyl acrylate mass ratio are 1:50:
1:0.5:0.8。
Further, the step（1）Middle drying temperature is 105 DEG C.
Further, step（2）Middle passivating solution accounts for 2/3rds of passivation sump volume.
Further, step（3）It is middle to use deionized water or washes of absolute alcohol to neutrality.
Embodiment 2
A kind of automobile component aluminum alloy surface passivating method, this method use passivating solution by weight by following component
It is made：Zinc nitrate 5, nitric acid 4, lanthanum chloride 0.18, Wu Luotuo 0.04, fluosilicic acid 1.22, sulfuric acid 0.5, sulfuric acid 2.8, amino front three
Pitch phosphine 0.3, potassium permanganate 0.8, modified epoxy 1.8, deionized water 120；
The passivating method specifically includes following steps：
（1）Pretreatment：Aluminum alloy surface is subjected to uniform grinding, polishes, is then cleaned again with deionized water, is dried；
（2）Passivation：Passivating solution is added in deactivation slot, is preheated to 70 DEG C, 30min is incubated, then will pass through step（1）Processing
Aluminium alloy afterwards is added in deactivation slot, floods completely in passivating solution, adjusts its temperature to 65 DEG C, the immersion treatment time
150s；
（3）Cleaning, drying：By step（2）Aluminium alloy after middle taking-up is cleaned to neutrality, then at 80 DEG C, drying, you can.
Further, the modified epoxy preparation method is：
Under nitrogen protection, polyoxypropyleneglycol is added into reactor, after being warming up to 55 DEG C, adds epoxy resin and horse
Carry out sour di-isooctyl, adjust the temperature to 70 DEG C, react 35min, after being subsequently added into hydroxyl amino acetic acidreaction 2 hours, add third
Olefin(e) acid hydroxyl ethyl ester reacts 40min again, is then cooled to 40 DEG C, and 15min is disperseed under 2000r/min high-speed stirreds, is produced, described
Polyoxypropyleneglycol, epoxy resin, diisooctyl maleate, hydroxyl amino acetic acid, hydroxy-ethyl acrylate mass ratio are 1:50:
1:0.5:0.8。
Further, the step（1）Middle drying temperature is 105 DEG C.
Further, step（2）Middle passivating solution accounts for 2/3rds of passivation sump volume.
Further, step（3）It is middle to use deionized water or washes of absolute alcohol to neutrality.
Embodiment 3
A kind of automobile component aluminum alloy surface passivating method, this method use passivating solution by weight by following component
It is made：Zinc nitrate 4, nitric acid 2, lanthanum chloride 0.16, Wu Luotuo 0.03, fluosilicic acid 1.20, sulfuric acid 0.4, sulfuric acid 2.6, amino front three
Pitch the potassium permanganate 0.7 of phosphine 0.2, modified epoxy 1.6, deionized water 112；
The passivating method specifically includes following steps：
（1）Pretreatment：Aluminum alloy surface is subjected to uniform grinding, polishes, is then cleaned again with deionized water, is dried；
（2）Passivation：Passivating solution is added in deactivation slot, is preheated to 70 DEG C, 30min is incubated, then will pass through step（1）Processing
Aluminium alloy afterwards is added in deactivation slot, floods completely in passivating solution, adjusts its temperature to 65 DEG C, the immersion treatment time
140s；
（3）Cleaning, drying：By step（2）Aluminium alloy after middle taking-up is cleaned to neutrality, then at 80 DEG C, drying, you can.
Further, the modified epoxy preparation method is：
Under nitrogen protection, polyoxypropyleneglycol is added into reactor, after being warming up to 55 DEG C, adds epoxy resin and horse
Carry out sour di-isooctyl, adjust the temperature to 70 DEG C, react 35min, after being subsequently added into hydroxyl amino acetic acidreaction 2 hours, add third
Olefin(e) acid hydroxyl ethyl ester reacts 40min again, is then cooled to 40 DEG C, and 15min is disperseed under 2000r/min high-speed stirreds, is produced, described
Polyoxypropyleneglycol, epoxy resin, diisooctyl maleate, hydroxyl amino acetic acid, hydroxy-ethyl acrylate mass ratio are 1:50:
1:0.5:0.8。
Further, the step（1）Middle drying temperature is 105 DEG C.
Further, step（2）Middle passivating solution accounts for 2/3rds of passivation sump volume.
Further, step（3）It is middle to use deionized water or washes of absolute alcohol to neutrality.
Further, the step（4）Soaking temperature is 95 DEG C in middle clear water, and drying temperature is 120 DEG C.
, as test specimen, to be handled using embodiment method automobile engine cylinder head aluminium alloy, the examination after experiment process
Part surface property is tested：
Table 1
| Adhesive force/level | Impact test | Neutral salt spray test（180h） | Humid test（1000h） | |
| Embodiment 1 | 0 | Zero defect | Zero defect | Zero defect |
| Embodiment 2 | 0 | Zero defect | Zero defect | Zero defect |
| Embodiment 3 | 0 | Zero defect | Zero defect | Zero defect |
As can be seen from Table 1, the automobile engine cylinder head aluminium alloy surface of test piece performance after present invention processing is greatly carried
Height, passivating film adhesive force is high, and corrosion resistance is strong.
Claims (5)
1. a kind of automobile component aluminum alloy surface passivating method, it is characterised in that the passivating solution that this method uses is by weight
Part meter is made up of following component：Zinc nitrate 3-5, nitric acid 1-4, lanthanum chloride 0.15-0.18, Wu Luotuo 0.02-0.04, fluosilicic acid
1.18-1.22, sulfuric acid 0.3-0.5, sulfuric acid 2.5-2.8, the methene phosphine 0.1-0.3 of amino three, potassium permanganate 0.6-0.8, modified ring
Oxygen tree fat 1.5-1.8, deionized water 110-120；
The passivating method specifically includes following steps：
（1）Pretreatment：Aluminum alloy surface is subjected to uniform grinding, polishes, is then cleaned again with deionized water, is dried；
（2）Passivation：Passivating solution is added in deactivation slot, is preheated to 70 DEG C, 30min is incubated, then will pass through step（1）Processing
Aluminium alloy afterwards is added in deactivation slot, floods completely in passivating solution, adjusts its temperature to 65 DEG C, immersion treatment time 130-
150s；
（3）Cleaning, drying：By step（2）Aluminium alloy after middle taking-up is cleaned to neutrality, then at 80 DEG C, drying, you can.
A kind of 2. automobile component aluminum alloy surface passivating method as claimed in claim 1, it is characterised in that the modified ring
Oxygen process for preparing resins is：
Under nitrogen protection, polyoxypropyleneglycol is added into reactor, after being warming up to 55 DEG C, adds epoxy resin and horse
Carry out sour di-isooctyl, adjust the temperature to 70 DEG C, react 35min, after being subsequently added into hydroxyl amino acetic acidreaction 2 hours, add third
Olefin(e) acid hydroxyl ethyl ester reacts 40min again, is then cooled to 40 DEG C, and 15min is disperseed under 2000r/min high-speed stirreds, is produced, described
Polyoxypropyleneglycol, epoxy resin, diisooctyl maleate, hydroxyl amino acetic acid, hydroxy-ethyl acrylate mass ratio are 1:50:
1:0.5:0.8。
A kind of 3. automobile component aluminum alloy surface passivating method as claimed in claim 1, it is characterised in that the step
（1）Middle drying temperature is 105 DEG C.
A kind of 4. automobile component aluminum alloy surface passivating method as claimed in claim 1, it is characterised in that step（2）In
Passivating solution accounts for 2/3rds of passivation sump volume.
A kind of 5. automobile component aluminum alloy surface passivating method as claimed in claim 1, it is characterised in that step（3）In
Using deionized water or washes of absolute alcohol to neutrality.
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| CN201710777397.9A CN107557774A (en) | 2017-09-01 | 2017-09-01 | A kind of automobile component aluminum alloy surface passivating method |
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| CN201710777397.9A CN107557774A (en) | 2017-09-01 | 2017-09-01 | A kind of automobile component aluminum alloy surface passivating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126918A (en) * | 2020-08-28 | 2020-12-25 | 广东安德力新材料有限公司 | Passivating agent for processing aluminum foil and preparation method thereof |
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2017
- 2017-09-01 CN CN201710777397.9A patent/CN107557774A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126918A (en) * | 2020-08-28 | 2020-12-25 | 广东安德力新材料有限公司 | Passivating agent for processing aluminum foil and preparation method thereof |
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Application publication date: 20180109 |
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| WD01 | Invention patent application deemed withdrawn after publication |