CN106756939A - aluminum passivation liquid and preparation method thereof - Google Patents

aluminum passivation liquid and preparation method thereof Download PDF

Info

Publication number
CN106756939A
CN106756939A CN201610235798.7A CN201610235798A CN106756939A CN 106756939 A CN106756939 A CN 106756939A CN 201610235798 A CN201610235798 A CN 201610235798A CN 106756939 A CN106756939 A CN 106756939A
Authority
CN
China
Prior art keywords
passivation
aluminum
passivation liquid
aluminum passivation
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610235798.7A
Other languages
Chinese (zh)
Inventor
邹明瑞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Ruijian Sports Equipment Co Ltd
Original Assignee
Foshan Ruijian Sports Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foshan Ruijian Sports Equipment Co Ltd filed Critical Foshan Ruijian Sports Equipment Co Ltd
Priority to CN201610235798.7A priority Critical patent/CN106756939A/en
Publication of CN106756939A publication Critical patent/CN106756939A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical 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
    • C23C22/05Chemical 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
    • C23C22/06Chemical 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
    • C23C22/34Chemical 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
    • C23C22/37Chemical 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 containing also hexavalent chromium compounds

Abstract

The invention provides a kind of aluminum passivation liquid, preparation method and its application method, the raw material proportioning of the passivating solution is:The g/L of zinc chromate 25, the g/L of cobaltous sulfate 0.5 1, the g/L of zirconium sulfate 23, the g/L of sodium fluoride 0.5 1.5, the g/L of sulfuric acid 24, the g/L of citric acid 12, balance of water.The passivation working solution being made into is diluted with the passivating solution(Tank liquor)Stabilization, concentration is relatively low, and passivation speed is very fast, and gained passivating film voidage is low, adhesive force is high, and the chromate film layer of yellow can be formed in aluminium material surface, with fabulous Corrosion Protection, can greatly improve workpiece with paint or the adhesive force of sprayed plastic coat.The resistance to neutral salt spray ability of passivating film for being formed more than 120 hours.

Description

Aluminum passivation liquid and preparation method thereof
Technical field
The present invention relates to metal conditioner field, in particular, be related to a kind of aluminum passivation liquid, preparation method and its Application method.
Background technology
Because activity is higher, the surface of aluminium and aluminium alloy easily aoxidizes and suffers erosion, and often needs to be passivated treatment.Pass through The passivation film thickness that Passivation Treatment is generated is larger and adjustable, with appropriate anti-corrosion, wear-resisting and durability against pollution, while the passivation Film can also improve the adhesive force of the coating such as aluminium and aluminium alloy and paint, commonly use the bottom of making coatings.
At present, aluminium and passivation technology for aluminum alloy, still mainly chromating technique, chromating film layer have good Self-repair function and corrosion resistance, be suitable for almost all of aluminium and aluminium and close alloy material.
But in traditional chromium hydrochlorate passivation technology, the chromate content for being passivated tank liquor is generally higher, such as 20-50g/L, operation temperature Degree is also often higher, and such as 80-90 DEG C, passivation time is more long, such as 10-20 minutes.For these shortcomings, Chinese patent application 201310203255.3 disclose a kind of efficient Aluminum Alloy at Room Temperature passivating solution and its preparation technology, based on 100 weight portion weight, contain There is following material:0.136-0.707 parts of potassium bichromate, 0.043-0.50 parts of ammonium fluoride, 0.043-0.44 parts of iron chloride, 0.48-0.98 parts of citric acid, 0.48-0.98 parts of rare earth metal, 0.48-0.98 parts of boric acid, 95.41-98.34 parts pure Water;Passivating solution stably operable at 20-35 DEG C, passivation time 15-50 seconds, 60-80 DEG C of drying temperature.But the passivating solution because Concentration is still higher, passivation speed is too fast, and gained passivating film has the shortcomings of voidage is larger, adhesive force is not high enough.
The content of the invention
An object of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of aluminum passivation liquid, uses the passivating solution The passivation working solution that dilution is made into(Tank liquor)Stabilization, concentration is relatively low, and passivation speed is very fast, and gained passivating film voidage is low, attachment Power is high, can aluminium material surface formed yellow chromate film layer, with fabulous Corrosion Protection, can greatly improve workpiece with The adhesive force of paint or sprayed plastic coat.The resistance to neutral salt spray ability of passivating film for being formed more than 120 hours.
The second object of the present invention is the preparation method for providing above-mentioned aluminum passivation liquid.
The third object of the present invention is the application method for providing above-mentioned aluminum passivation liquid.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of aluminum passivation liquid, is dissolved in deionized water by plurality of raw materials and formed, wherein each material component proportioning is:
Zinc chromate 2-5 g/L
Cobaltous sulfate 0.5-1 g/L
Zirconium sulfate 2-3 g/L
Sodium fluoride 0.5-1.5 g/L
Sulfuric acid 2-4 g/L
Citric acid 1-2 g/L
Water surplus.
The preferred 4-5 g/L of wherein described zinc chromate;
The preferred 0.7-0.9 g/L of wherein described cobaltous sulfate;
The preferred 2.5-3 g/L of wherein described zirconium sulfate;
The preferred 1.0-1.5g/L of wherein described sodium fluoride;
The preferred 3-4 g/L of wherein described sulfuric acid;
The preferred 1.5-2 g/L of wherein described citric acid;
The preparation method of aluminum passivation liquid of the present invention, in turn includes the following steps:
(1) in a reservoir add aequum deionized water 3/5 volume, add sulfuric acid simultaneously stir evenly, add zinc chromate, cobaltous sulfate, Zirconium sulfate, stirring is to being completely dissolved;
(2) sodium fluoride, citric acid are added, stirring is to being completely dissolved;
(3) deionized water is stirred evenly to overall solution volume needed for adding residue, you can obtain aluminum passivation liquid of the present invention.
The application method of aluminum passivation liquid of the present invention, in turn includes the following steps:
(1)The aluminium and Al alloy parts for treating passivation carry out purified treatment;
(2)Adding deionized water to be diluted to 30-100 times of volume the passivating solution turns into passivation working solution, stirs evenly, and controls temperature 20-35 DEG C, treatment 1-10 minutes is passivated to the aluminium and Al alloy parts after purification;
(3)The aluminium after passivation and Al alloy parts are dried with 50-60 DEG C of hot blast.
Wherein, step(2)In, the method that the metalwork after described pair of purification is passivated treatment is preferably soaked or is sprayed, The Passivation Treatment time is preferred 3-8 minutes;If workpiece treatment quantity is more, and according to the passivation layer quality condition of workpiece surface to blunt Change working solution and suitably supplement passivating solution of the present invention, maintain passivation working solution pH value 1.8-2.8.
The choosing principles of aluminum passivation liquid each component of the present invention and effect are as follows:
(1)Zinc chromate:It is the fundamental component of passivating film;
(2)Sulfuric acid:H is provided+Ion so that aluminium dissolves;
(3)Citric acid:Complexing agent, can control the stability of film forming speed and passivation working solution;
(4)Cobaltous sulfate, zirconium sulfate:Film forming accelerating, and passivation film color can be adjusted;
(5)Sodium fluoride:Film forming accelerating, can accelerate passivating film and form speed, and refine passivation film structure, make passivating film color more Plus it is bright-coloured.
Aluminum passivation liquid of the present invention forms the general principle of passivating film in aluminium and aluminum alloy surface:Al Contact acid passivation Working solution, dissolving forms aluminium ion, while aluminum ions formation consumes acid, causes the pH of metallic aluminum surface solution to rise, chromium Acid group directly occurs in pH metallic aluminum surface solution layers higher anti-with zinc ion, aluminium ion, cobalt ions, zirconium ion etc. Should, insoluble compound is formed, adsorb, precipitate on aluminum surfaces, so as to form corrosion resistance preferably yellow passivated film.
Aluminum passivation liquid of the present invention has the beneficial effect that:
1. passivation operation is carried out under 20-35 DEG C of normal temperature, saving energy consumption, and passivation working solution is relatively stablized, and can avoid because of temperature mistake It is high or too low and cause epithelium thin or epithelium it is loose porous and make epithelium corrosion resisting property be deteriorated problem, Chromating Film On Zn Deposits are preferably simultaneously It is easily controllable;
2. the passivation pH value range that is allowed of working solution is wide, easy to control, the color of epithelium, bright when between pH value 1.8~2.8 Degree, corrosion resistance are relatively stablized, and effect is more preferable during pH value 1.8~2.0;
3. film forming speed speed is moderate, and passivation time length is moderate, it is easy to implement;
4. gained passivating film corrosion resisting property is good, and salt spray test can reach more than 120 hours(Workpiece surface is without any white rust or white Spot), porosity is low, it is not necessary to processed using sealer;
5. gained passivating film adhesion-tight, can greatly improve workpiece with paint or the adhesive force of sprayed plastic coat.
In the embodiment of the present invention, the neutral salt spray corrosion test of workpiece after Passivation Treatment(NSS)Method is:Reference ISO3768 standards, the selected workpiece after Passivation Treatment is put into salt-mist corrosion tester, and salt solution contains 5%(wt)Sodium chloride, pH value 6.5~7.2, temperature (35 ± 2) DEG C, 1~2mL/ of amount of fog (hcm2), after 120 hours time, observation has non-corroding, there is rust Corrosion area is then surveyed in erosion, calculates the percentage that corrosion area accounts for workpiece surface product.
Passivation film porosity:Go bail in there is brown bottle, mass fraction is sodium chloride 14%, aluminon 0.35%, Bai Ming The distilled water solution of glue 1.0%, the scraps of paper that length and width is 10 centimetres are cut into by filter paper, and the scraps of paper are immersed into above-mentioned molten with plastic tweezer In liquid, the net unnecessary test solution of drop is proposed, be covered in the passivating film surface of workpiece(Passivating film length and width is all higher than 10 centimetres), 5 minutes After remove test paper, observe workpiece film surface, have and aperture sections indicated at punctation.Parallel sample 3 is respectively taken during experiment, Draw the orange red spot par on area every square centimeter.
Passivating film and sprayed plastic coat adhesive force:According to the cross cut test standard of GB 9286-1998 paint and varnish paint films Tested, determined adhesive force grade, paint used is F-C paint, coating layer thickness about 25um after doing.
Specific embodiment
Further detailed description is done to the present invention below in conjunction with specific embodiment.
Embodiment 1-10
Embodiment 1-10 sets forth the composition of aluminum passivation liquid of the present invention, specifically as listed in table 1, wherein, the list of dispensing numerical value Position is g/L.
The embodiment 1-10 of table 1 formula compositions
Embodiment 1 2 3 4 5 6 7 8 9 10
Zinc chromate 3 3 3.5 3.5 4 4 4.5 4.5 5 5
Cobaltous sulfate 0.5 1 0.8 0.6 0.7 0.9 0.6 1 0.7 0.8
Zirconium sulfate 2 3 2.8 2.2 2.5 3 2.9 2.1 2 2.7
Sodium fluoride 0.8 1.5 0.6 0.9 1.4 1.5 0.5 0.7 1 1.3
Sulfuric acid 3 4 2 2.5 3.5 3 4 2 3 4
Citric acid 2 2 1 2 2 1 1 2 2 2
Water Surplus Surplus Surplus Surplus Surplus Surplus Surplus Surplus Surplus Surplus
The preparation method of above example 1-10 passivating solutions is as follows:600ml deionized waters are added in 2000ml beakers, sulphur is added Acid is simultaneously stirred evenly, and adds zinc chromate, cobaltous sulfate, zirconium sulfate, and stirring is to being completely dissolved;Sodium fluoride, citric acid are added, stirring is to complete Dissolving;Deionized water to overall solution volume 1000ml is added, is stirred evenly, you can obtain aluminum passivation liquid of the present invention.
Comparative example 11-14
Table 2 is the formula of the comparative example 11-14 aluminum passivation liquid set with reference to prior art, and the unit of each dispensing numerical value is g/L, remaining It is pure water to measure.
The comparative example 11-14 aluminum passivation formula of liquid of table 2
Comparative example 11 12 13 14
Potassium bichromate 2.8 4.1 5.5 6.8
Ammonium fluoride 0.5 1 1.5 2.4
Iron chloride 0.5 0.6 0.7 0.8
Citric acid 5 6.8 7.8 8.7
Mixed chlorinated rare earth (in terms of metal) 5 6.8 7.8 8.7
Boric acid 5 6.8 7.8 7.7
Plus sulfuric acid adjusts pH value extremely 2.0 2.0 2.0 2.0
The preparation method of above comparative example 11-14 passivating solutions is as follows, respectively with liquid 1000ml:600ml is added in 2000ml beakers Deionized water, adds sulfuric acid simultaneously to stir evenly, and adds potassium bichromate, iron chloride, rare earth chloride, and stirring is to being completely dissolved;Add lemon Acid, boric acid, stirring is to being completely dissolved;Ammonium fluoride is added, stirring is to being completely dissolved;Add deionized water to overall solution volume 1000ml, is stirred evenly, plus moderate amount of sulfuric acid is adjusted to pH values 2.0.
Below with aluminium alloy sheet that siliceous, magnesium the trade mark is 6063 as test piece, above example 1-10, right is described separately The application method and passivation effect of ratio 11-14 aluminum passivation liquid, specimen size are all 120x120x2mm, have passed through in advance including Oil removing and the purified treatment of pickling.
Add deionized water to be diluted to 50 times of volumes the passivating solution of embodiment 1-10, at 25 DEG C, place is passivated to test piece Reason, passivation time is 5 minutes, after test piece is through deionized water rinsing after passivation, then with 60 DEG C of hot-air seasoning.
The passivating solution of comparative example 11-14, at 25 DEG C, treatment is passivated to test piece without dilution, and passivation time is 40 seconds, After test piece is through deionized water rinsing after passivation, then with 60 DEG C of hot-air seasoning.
Above example, the using effect of comparative example are shown in Table 3, table 4 respectively.
The using effect of the embodiment 1-10 aluminum passivation liquid of table 3
Embodiment 1 2 3 4 5 6 7 8 9 10
Passivating film color Homogeneous yellow Homogeneous yellow Homogeneous yellow Homogeneous yellow Homogeneous yellow Homogeneous yellow Homogeneous yellow Homogeneous yellow Homogeneous yellow Homogeneous yellow
Neutral salt spray corrosion test(Workpiece surface whether there is white rust or hickie) Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing
Passivation film porosity(Individual spot/cm2 0.02 0.05 0.01 0.04 0.05 0.03 0.06 0.02 0.02 0.05
Passivating film and sprayed plastic coat adhesive force grade 0 grade 0 grade 0 grade 0 grade 0 grade 0 grade 0 grade 0 grade 0 grade 0 grade
The using effect of the comparative example 11-14 aluminum passivation liquid of table 4
Comparative example 11 12 13 14
Passivating film color Colour, it is uneven Colour, uniformly Colour, it is uneven Colour, uniformly
Neutral salt spray corrosion test(Workpiece surface whether there is white rust or hickie, or corrosion area) 0.1% 0.3% Nothing Nothing
Passivation film porosity(Individual spot/cm2 0.4 0.6 0.5 0.2
Passivating film and sprayed plastic coat adhesive force grade 1 grade 1 grade 0 grade 0 grade
Embodiment 15
With the aluminum passivation liquid 100ml of embodiment 7, it is diluted with water to 50 times of i.e. 5000ml of volume and mixes, is made passivation working solution (Tank liquor), at 25 DEG C, 100 above-mentioned test pieces being passivated with treatment, passivation time is 5 minutes, and test piece is through deionization after passivation After water is rinsed, then with 60 DEG C of hot-air seasoning.The passivation situation for observing every test piece is all preferable, and color and luster is consistent, take the 10th respectively, 30th, 50,70,100 carry out neutral salt spray corrosion test, determine passivation film porosity, passivating film and sprayed plastic coat adhesive force, It is attained by the passivation effect situation listed by table 3.
Above content describes general principle of the invention and principal character, and the present invention is not limited to the above embodiments, Without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, and these changes and improvements are all Fall into scope of the claimed invention.The claimed scope of the invention is by appending claims and its equivalent circle. It is fixed.

Claims (9)

1. a kind of aluminum passivation liquid, is dissolved in deionized water by plurality of raw materials and formed, wherein each material component proportioning is:Zinc chromate 2- 5 g/L, cobaltous sulfate 0.5-1 g/L, zirconium sulfate 2-3 g/L, sodium fluoride 0.5-1.5 g/L, sulfuric acid 2-4 g/L, citric acid 1-2 G/L, balance of water.
2. aluminum passivation liquid as claimed in claim 1, it is characterised in that described zinc chromate is 4-5 g/L.
3. aluminum passivation liquid as claimed in claim 1, it is characterised in that described cobaltous sulfate is 0.7-0.9 g/L.
4. aluminum passivation liquid as claimed in claim 1, it is characterised in that described zirconium sulfate is 2.5-3 g/L.
5. aluminum passivation liquid as claimed in claim 1, it is characterised in that described sodium fluoride is 1.0-1.5g/L.
6. aluminum passivation liquid as claimed in claim 1, it is characterised in that described sulfuric acid is 3-4 g/L.
7. aluminum passivation liquid as claimed in claim 1, it is characterised in that described citric acid is 1.5-2 g/L.
8. the preparation method of aluminum passivation liquid as claimed in claim 1, in turn includes the following steps:
(1) in a reservoir add aequum deionized water 3/5 volume, add sulfuric acid simultaneously stir evenly, add zinc chromate, cobaltous sulfate, Zirconium sulfate, stirring is to being completely dissolved;
(2) sodium fluoride, citric acid are added, stirring is to being completely dissolved;
(3) deionized water is stirred evenly to overall solution volume needed for adding residue.
9. the application method of aluminum passivation liquid as claimed in claim 1, in turn includes the following steps:
(1)The aluminium and Al alloy parts for treating passivation carry out appropriate purified treatment;
(2)Adding deionized water to be diluted to 30-100 times of volume the passivating solution turns into passivation working solution, stirs evenly, and controls temperature 20-35 DEG C, treatment 1-10 minutes is passivated to the aluminium and Al alloy parts after purification;
(3)The aluminium after passivation and Al alloy parts are dried with 50-60 DEG C of hot blast.
CN201610235798.7A 2016-04-16 2016-04-16 aluminum passivation liquid and preparation method thereof Pending CN106756939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610235798.7A CN106756939A (en) 2016-04-16 2016-04-16 aluminum passivation liquid and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610235798.7A CN106756939A (en) 2016-04-16 2016-04-16 aluminum passivation liquid and preparation method thereof

Publications (1)

Publication Number Publication Date
CN106756939A true CN106756939A (en) 2017-05-31

Family

ID=58972216

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610235798.7A Pending CN106756939A (en) 2016-04-16 2016-04-16 aluminum passivation liquid and preparation method thereof

Country Status (1)

Country Link
CN (1) CN106756939A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107236944A (en) * 2017-06-19 2017-10-10 苏州莱特复合材料有限公司 A kind of preparation method of auto parts powdered-metal passivator
CN107641803A (en) * 2017-10-19 2018-01-30 深圳市鸿美特科技有限公司 The method of aluminum alloy die casting passivating solution, preparation method and Passivation Treatment
CN113235077A (en) * 2021-05-11 2021-08-10 齐齐哈尔北方集团北方化学工业有限责任公司 Aluminum alloy vanadium-titanium-europium passivation solution and preparation and use method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104451634A (en) * 2014-12-26 2015-03-25 湖南金裕化工有限公司 Aluminum and aluminum alloy passivation solution, preparation method and using method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104451634A (en) * 2014-12-26 2015-03-25 湖南金裕化工有限公司 Aluminum and aluminum alloy passivation solution, preparation method and using method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107236944A (en) * 2017-06-19 2017-10-10 苏州莱特复合材料有限公司 A kind of preparation method of auto parts powdered-metal passivator
CN107641803A (en) * 2017-10-19 2018-01-30 深圳市鸿美特科技有限公司 The method of aluminum alloy die casting passivating solution, preparation method and Passivation Treatment
CN113235077A (en) * 2021-05-11 2021-08-10 齐齐哈尔北方集团北方化学工业有限责任公司 Aluminum alloy vanadium-titanium-europium passivation solution and preparation and use method thereof

Similar Documents

Publication Publication Date Title
CN105779988B (en) A kind of electrogalvanizing chromium-free deactivation solution and its passivation technology
CN102912338B (en) Aluminium alloy trivalent chromium passivation solution as well as preparation method and passivation technology thereof
CN101736337B (en) Method for preparing chromium-free passivation solution, and method for passivating electrogalvanizing or zinc alloy layer by using same
CN104451634B (en) Aluminum and aluminum alloy passivation solution, preparation method and using method thereof
CN104404492A (en) Chromium-free passivation solution as well as preparation and using methods thereof
CN107740085B (en) A kind of composite coloured passivating solution of environment-friendly type and preparation method thereof
CN101135050B (en) Metasilicate cleaning inactivating process
CN106756939A (en) aluminum passivation liquid and preparation method thereof
CN104073796A (en) Metal plating passivation solution and preparation method thereof
CN107012453A (en) A kind of method that green low temperature quickly prepares phosphating coat
CN102268664B (en) Chromium-free passivating solution used for black passivation treatment of zinc plating and preparation method thereof
CN103102724B (en) A kind of containing acrylic acid Metal surface silane treatment agent and preparation method thereof
CN105755456A (en) Alkaline passivation solution
CN108546941B (en) Environment-friendly titanium salt color passivation solution
CN102409330A (en) Chromium-free passivation solution
CN104498923B (en) Trivalent chromium colorful passivation liquid, preparation method and its application method
CN105803440B (en) A kind of carbon steel, galvanized sheet, aluminium are the same as rooved face pretreating agent, preparation method and metal surface pretreatment
CN104357818B (en) A kind of compositions for steel iron phosphatising and preparation method thereof
CN110079795B (en) Galvanized part surface treating agent and preparation method thereof
CN101200799A (en) Medium-low temperature high corrosion resistant black phosphating solution on steel surface
CN110468398A (en) A kind of phytic acid passivating solution and preparation and deactivating process for the treatment of
EP2784188B2 (en) Process for corrosion protection of iron containing materials
CN110172689A (en) A kind of room temperature zinc layers trivalent chromium colorful inactivating treatment liquid and preparation and application
CN106435547B (en) A kind of environment-protective process replacing chromic acid passivation
CN109023331A (en) A kind of chrome-free tanning agent and its application method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20170531