CN106676507A - Aluminium alloy passivant without chromium and using method thereof - Google Patents
Aluminium alloy passivant without chromium and using method thereof Download PDFInfo
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- CN106676507A CN106676507A CN201611184740.0A CN201611184740A CN106676507A CN 106676507 A CN106676507 A CN 106676507A CN 201611184740 A CN201611184740 A CN 201611184740A CN 106676507 A CN106676507 A CN 106676507A
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- passivator
- passivating
- passivant
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- aluminium alloy
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/44—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also fluorides or complex fluorides
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- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses an aluminium alloy passivant without chromium and a using method thereof. The passivant is characterized by comprising 0.1-10.0 g/L of fluoride, 2-10 g/L of oxidizing agents, 1-8 g/L of stabilizers, 0.1-10.0 g/L of corrosion inhibitors, 1-8 g/L of rare-earth salt, 0.5-5 g/L of coalescing agents, and the balance water. The passivant does not contain heavy metal ions, particularly to chromium ions, so that the burden of wastewater treatment is relieved, the harm to the environment and human health is reduced, additionally, passivating treatment time is short, and heating is not needed in the process of passivating. The treatment method is simple in step, the passivating film on the surface of aluminium alloy treated through the aluminium alloy passivant without the chromium has the characteristics of thin film, being compact and uniform, good glossiness and corrosion resistance.
Description
Technical field
The present invention relates to metal passivation, in particular it relates to one kind is without Cr-Al alloy passivator and its using method.
Background technology
Corrosion science has particularly important impact to national economy, and metal erosion can affect the people's lives and property to pacify
Entirely, it is related to industrial and agricultural production and national defense construction.Country uses in a large number metal material, and metal material is in most cases
Contact with corrosive atmosphere medium and corrode, therefore, corrosion and protection is critically important.The natural generation of aluminium material surface
Oxide-film corrosion resistance be it is limited, and natural oxide film with paint etc. organic coating adhesion it is low, aluminium is using process
In easily corroded, therefore aluminium is needed through effective anti-corrosion treatment.The optimal anti-corrosive treatment method of aluminium alloy is
Previously prepared surface conversion coating, then carries out spray treatment, and at present the generally acknowledged preferable method of anticorrosion is at traditional chromate
Reason.But chromium ion has carcinogenic toxicity, there is certain health hazard to producers, so needing to develop one kind and can take
The method of another kind of passivation of generation traditional chromium ion passivation.
In existing technology, the most of passivating solutions for using are traditional solution containing chromate, containing chromatedsolution
There is suitable harm to human body, such as it is carcinogenic.And chromium ion can cause serious harm to water body, soil and ecology, very
Human body extremely can be entered into by way of water circulation, serious harm is caused to health.
The content of the invention
It is an object of the invention to provide a kind of colourless formula without Cr-Al alloy passivator and using method, the passivator is not
Chromium ion is not especially contained containing heavy metal ion, the burden of wastewater treatment is alleviated, the harm to environment and human health is reduced,
And the Passivation Treatment time is short, passivating process is without the need for heating；The step of processing method, is simple, is passivated without Cr-Al alloy by this
The passivating film on the surface of the aluminium alloy that agent is processed has the good and corrosion resistant characteristic of thin film, dense uniform, glossiness.
To achieve these goals, the invention provides a kind of colourless without Cr-Al alloy passivator, it is characterised in that
The composition of the passivating solution：Fluoride is 0.1~10.0g/L, and oxidant is 2-10g/L, and stabilizer is 1-8g/L parts, is delayed
Erosion agent is 0.1~10.0g/L parts, and rare-earth salts is 1-8g/L, coalescents 0.5-5g/L parts, balance of water.
Preferably, it is characterised in that the stabilizer is acetic acid.
Preferably, it is characterised in that the fluoride be sodium fluoride, potassium fluosilicate, prodan.
Preferably, it is characterised in that the corrosion inhibiter is citric acid or tartaric acid.
Preferably, it is characterised in that the oxidant is H2O2, KMnO4,（NH4）2S2O8。
Preferably, it is characterised in that the coalescents are HF, SrCl2, NH4VO3,（NH4）2ZrF6。
Preferably, it is characterised in that the rare-earth salts is cerium salt or lanthanum salt.Wherein, rare-earth salts is used as main film forming substance
Exist.
In the present invention, the species of rare-earth salts can be selected in wide scope, but in order that passivating film is thinner, more
Dense uniform, glossiness are more preferably and more resistant to corrosion, it is preferable that the rare-earth salts is lanthanum sulfate, and content is 8g/L.
Preferably, it is characterised in that component constitutes by weight as follows：Sodium fluoride is 5g/L, and KMnO4 is 6g/L, and acetic acid is 5
G/L, citric acid is 5 g/L, and lanthanum sulfate is 8g/L, and SrCl2 is 1 g/L, balance of water.
Present invention provides a kind of without Cr-Al alloy passivator using method, it is characterised in that will using right
Ask passivator described in 1 that vitrification process is passivated to aluminium alloy, comprise the following steps：
（1）Oil removing, ungrease treatment are carried out to metal surface；
（2）Washing；
（3）Process is passivated using immersion way；Wherein main technologic parameters be passivating agent concentration 5-10% weight ratio, temperature
0~40 DEG C, pH value：4-6；
（4）Deionized water is washed；
（5）Drying.
In the present invention,（1）Oil removing degreasing process parameter and step are as described below, and according to mass ratio degreaser is prepared：18%
Sodium carbonate, 2.5% sodium gluconate, 2.3% paregal O -20,10% sodium polyphosphate, 67.2% is water.Again dilute with water be containing
The solution of above-mentioned degreaser 10%, need to process workpiece 5 minutes using the solution soaking after dilution at ambient temperature；（2）Washing work
Skill is：Workpiece 1-2 minutes in the water of overflow after immersion treatment ungrease treatment；（3）Passivation：The described passivator of invention is matched somebody with somebody
It is the solution for having 5~10% passivating solutions to be set to content, and it is 4~6 that regulation makes its pH value, and aluminium alloy is soaked in passivation liquor
Need 7-15min；（4）Pure water is washed：Using deionized water cleaning workpiece 1-2 minutes, and clean 2 times；（5）It is dried：Jing Chrome-frees is blunt
Agent is processed and the workpiece after washing is put in 110 DEG C of baking ovens and dries 10min.
The condition of immersion can be selected in wide scope, but in order that passivating film is thinner, more dense uniform, gloss
Degree is more preferably and more resistant to corrosion, it is preferable that the immersion meets following condition：Soaking temperature is room temperature, and soak time is 7-
15min, pH are 5.
By above-mentioned technical proposal, what the present invention was provided contains acetic acid, oxidant without Cr-Al alloy passivator, corrosion inhibiter,
Rare-earth salts etc..It is that aluminium alloy is soaked or sprayed in the above-mentioned passivator without Cr-Al alloy, by Chrome-free technique is passivated
The synergism of each material in aluminium alloy passivator so that the passivating film that the surface of the aluminium alloy after immersion is formed, forms tool
There is the good and corrosion resistant characteristic of thin film, dense uniform, glossiness.Other features and advantages of the present invention are by subsequent concrete reality
The mode part of applying is described in detail.
Specific embodiment
The specific embodiment of the present invention is described in detail below.It should be appreciated that described herein concrete
Embodiment is merely to illustrate and explains the present invention, is not limited to the present invention.
Embodiment 1
Without Cr-Al alloy passivator, sodium fluoride contained therein is 1g/L, H to one kind2O2For 2g/L, acetic acid is 2-8g/L parts, Fructus Citri Limoniae
Sour 1g/L parts, cerous nitrate is 1/L, and HF is 1g/L parts, balance of water.The passivation technology is：
（1）Oil removing, ungrease treatment are carried out to metal surface；
（2）Washing；
（3）Process is passivated using immersion way；Wherein main technologic parameters be the weight ratio of passivating agent concentration 5%, temperature 20
DEG C, pH value：4, soak time is 7min；
（4）Deionized water is washed；
（5）Drying.
Anti-corrosion grade is 8 grades in passivating film 168h neutral salt spray styles.
Embodiment 2
Without Cr-Al alloy passivator, prodan contained therein is 5g/L, KMnO to one kind4For 5g/L, acetic acid is 5g/L parts, Fructus Citri Limoniae
Sour 3g/L parts, lanthanum sulfate is 3/L, SrCl2For 2g/L parts, balance of water.The passivation technology is：
（1）Oil removing, ungrease treatment are carried out to metal surface；
（2）Washing；
（3）Process is passivated using immersion way；Wherein main technologic parameters be the weight ratio of passivating agent concentration 8%, temperature 20
DEG C, pH value：5；Soak time is 10min；
（4）Deionized water is washed；
（5）Drying.
The passivating film is golden metallic film, and anti-corrosion grade is 8 grades in 168h neutral salt spray styles.
Embodiment 3
It is a kind of that without Cr-Al alloy passivator, prodan contained therein is 8g/L,（NH4）2S2O8For 8g/L, acetic acid is 5g/L parts,
Citric acid 3g/L parts, lanthanum sulfate is 3/L,（NH4）2ZrF6For 3g/L parts, balance of water.The passivation technology is：
（1）Oil removing, ungrease treatment are carried out to metal surface；
（2）Washing；
（3）Process is passivated using immersion way；Wherein main technologic parameters be the weight ratio of passivating agent concentration 8%, temperature 20
DEG C, pH value：6；Soak time is 10min；
（4）Deionized water is washed；
（5）Drying.
The passivating film is golden metallic film, and anti-corrosion grade is 8 grades in 168h neutral salt spray styles.
Claims (10)
1. one kind is without Cr-Al alloy passivator, it is characterised in that the composition of the passivating solution：Fluoride be 0.1~10.0g/L, oxygen
Agent is 2-10g/L, and stabilizer is 1-8g/L parts, and corrosion inhibiter is 0.1~10.0g/L parts, and rare-earth salts is 1-8g/L, coalescents
0.5-5g/L parts, balance of water.
2. passivator according to claim 1, it is characterised in that the stabilizer is acetic acid.
3. passivator according to claim 1, it is characterised in that the fluoride is sodium fluoride, potassium fluosilicate, hexafluosilicic acid
Sodium.
4. passivator according to claim 1, it is characterised in that the corrosion inhibiter is citric acid or tartaric acid.
5. passivator according to claim 1, it is characterised in that the oxidant is H2O2, KMnO4,（NH4）2S2O8。
6. passivator according to claim 1, it is characterised in that the coalescents are HF, SrCl2, NH4VO3,
（NH4）2ZrF6。
7. passivator according to claim 1, it is characterised in that the rare-earth salts is cerium salt or lanthanum salt.
8. passivator according to claim 6, it is characterised in that the rare-earth salts is lanthanum sulfate, and content is 8g/L.
9. the passivator according to claim 1-6, it is characterised in that component constitutes by weight as follows：Sodium fluoride is 5g/L,
KMnO4For 6g/L, acetic acid is 5 g/L, and citric acid is 5 g/L, and lanthanum sulfate is 8g/L, SrCl2For 1 g/L, balance of water.
10. one kind is without Cr-Al alloy passivator using method, it is characterised in that aluminum is closed using passivator described in claim 1
Gold is passivated vitrification process, comprises the following steps：
Oil removing, ungrease treatment are carried out to metal surface；
Washing；
Process is passivated using immersion way；Wherein main technologic parameters be passivating agent concentration 5-10% weight ratio, temperature 0~
40 DEG C, pH value：4-6；
Deionized water is washed；
Drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611184740.0A CN106676507A (en) | 2016-12-20 | 2016-12-20 | Aluminium alloy passivant without chromium and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611184740.0A CN106676507A (en) | 2016-12-20 | 2016-12-20 | Aluminium alloy passivant without chromium and using method thereof |
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| CN201611184740.0A Pending CN106676507A (en) | 2016-12-20 | 2016-12-20 | Aluminium alloy passivant without chromium and using method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299339A (en) * | 2017-06-13 | 2017-10-27 | 东莞宜安科技股份有限公司 | A kind of three-in-one and four-in-one pre-treatment liquid medicine |
| CN107740087A (en) * | 2017-10-20 | 2018-02-27 | 中南大学 | A kind of manganese metal chrome-free tanning agent and its preparation method and application |
| CN108796578A (en) * | 2018-05-30 | 2018-11-13 | 江苏寅凯照明科技有限公司 | A kind of formula and technique substituting aluminium alloy light pole anodic oxidation |
| CN112593221A (en) * | 2020-12-09 | 2021-04-02 | 苏州帝航防护设施有限公司 | Anti-oxidation aluminum alloy surface treating agent |
| CN112813423A (en) * | 2020-12-25 | 2021-05-18 | 瑞声科技（南京）有限公司 | Temperature-equalizing plate manufacturing method and temperature-equalizing plate |
| CN116441143A (en) * | 2023-04-19 | 2023-07-18 | 佛山泰铝新材料有限公司 | Novel aluminum alloy surface treatment method and equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892477A (en) * | 2010-06-21 | 2010-11-24 | 华南理工大学 | Treatment solution for preparing aluminum alloy surface amorphous composite passivation film, preparation method and application |
-
2016
- 2016-12-20 CN CN201611184740.0A patent/CN106676507A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892477A (en) * | 2010-06-21 | 2010-11-24 | 华南理工大学 | Treatment solution for preparing aluminum alloy surface amorphous composite passivation film, preparation method and application |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299339A (en) * | 2017-06-13 | 2017-10-27 | 东莞宜安科技股份有限公司 | A kind of three-in-one and four-in-one pre-treatment liquid medicine |
| CN107740087A (en) * | 2017-10-20 | 2018-02-27 | 中南大学 | A kind of manganese metal chrome-free tanning agent and its preparation method and application |
| CN108796578A (en) * | 2018-05-30 | 2018-11-13 | 江苏寅凯照明科技有限公司 | A kind of formula and technique substituting aluminium alloy light pole anodic oxidation |
| CN112593221A (en) * | 2020-12-09 | 2021-04-02 | 苏州帝航防护设施有限公司 | Anti-oxidation aluminum alloy surface treating agent |
| CN112813423A (en) * | 2020-12-25 | 2021-05-18 | 瑞声科技（南京）有限公司 | Temperature-equalizing plate manufacturing method and temperature-equalizing plate |
| CN116441143A (en) * | 2023-04-19 | 2023-07-18 | 佛山泰铝新材料有限公司 | Novel aluminum alloy surface treatment method and equipment |
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Effective date of registration: 20170804 Address after: 518131 Guangdong province Shenzhen city Longhua District Guanlan Street Stone Lake Road No. 16 cattle Village Applicant after: Shenzhen Hao long new materials technology Co. Ltd. Address before: 518000 Guangdong province Shenzhen city Longhua District Guanlan Street Stone Lake Road No. 22 cattle Village Applicant before: Shenzhen Haolong Technology Co., Ltd. |
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