CN109280914A - A kind of preparation method of green galvanized chromium-free sky blue passivator - Google Patents
A kind of preparation method of green galvanized chromium-free sky blue passivator Download PDFInfo
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- CN109280914A CN109280914A CN201811419158.7A CN201811419158A CN109280914A CN 109280914 A CN109280914 A CN 109280914A CN 201811419158 A CN201811419158 A CN 201811419158A CN 109280914 A CN109280914 A CN 109280914A
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- sky blue
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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
- C23C22/40—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
Abstract
The present invention successfully replaces chromate with molybdate, green galvanized chromium-free sky blue passivator is made, consisting of: sodium molybdate 40g/L, malonic acid 10g/L, nickel sulfate 1.2g/L, phytic acid 10mL/L, potassium permanganate 2g/L, neopelex 2g/L, remaining is pure water.Green galvanized chromium-free sky blue passivator can significantly improve the corrosion resisting property of coating, while assign the sky blue of coating light.
Description
Technical field
The present invention relates to a kind of preparation method of green galvanized chromium-free sky blue passivator more particularly to a kind of green are zinc-plated
The effect and preparation method of the ingredient, each ingredient of Chrome-free sky blue passivator.
Background technique
Electrogalvanizing is widely used as the protective coating of steel surface, is applied to the neck such as machinery, aviation, metallurgy, ship, building
Domain, to prevent the rotten candle of steel.Since zinc is more stronger than the electric conductivity of steel, it provides fabulous protectiveness, plays rotten candle medium
Effect.However, there are great potential differences between steel and coating, so that the solution rate of coating is big.Therefore, in production process
In, in order to improve metal or coated articles surface corrosion resistance performance and coating performance, its surface quality is improved, extends it and uses the longevity
Life, generally will carry out Passivation Treatment appropriate to it.Passivation Treatment belongs to a kind of chemically transformed film technique, it be by chemistry or
The means such as electrochemistry change metallic surface state, so that the electrode potential of metal is leaped to positive direction, become anti-corrosion passive state,
Show corrosion resistant performance, this layer film is then known as passivating film.The technique has equipment simple, and operation is easy, low in cost
The advantages that, therefore become the common technology of one of miscellaneous process for treating surface.Not according to zinc coating passivation film
Zinc-plated purifying process can be roughly divided into: sky blue passivation, black passivation and chromatic passivation by same appearance colour.
The chromatic passivation treatment process generallyd use in the market is chromating.Since chromate raw material sources are extensive,
Passivation technology is simple, and obtained binding force of passive film is good, and corrosion resisting property is high, and has self-repairing capability, thus chromate
Passivation Treatment is widely used.However as social development, international community is higher and higher for environmental requirement, Cr VI
It is extremely toxic substance, there is very big harm for human body and environment, European Union promulgates that " limitation uses certain in electronic and electrical equipment thus
A little Hazardous Substances Directives ", the electric equipment products that European Union requirements member state ensures newly to launch from July 1st, 2006 is not
Obtain the nuisances such as lead, mercury, cadmium, Cr VI, poly- dibromodiphenyl ether (PBDE), poly- bromo biphenyl (PBB) containing the requirement that is above standard
Matter.Cr VI in electroplating wastewater is explicitly pointed out in the GB21900-2008 " discharge standard for electroplating pollutants " that country puts into effect to discharge
Amount is not above 0.2mg/L, and total chromium is not above 1.0mg/L.Therefore, in order to protect environment, the health of people, ring are ensured
Guarantor's type products substitution chromium passivating becomes an urgent demand.
Blue and white passivating film generate basic principle be exactly the colour of colored passive films is washed off under basic conditions, thus
Achieve the effect that blue and white.The blue and white passivating film that traditional trivalent chromium passivator is passivated out is the film using trivalent chromium as skeleton
Layer, color is based on misty light blue white.
The related Chrome-free blue-white deactivator reported both at home and abroad at present, composition are generally (main by molybdate or silicate
Film forming agent), cobalt salt (secondary film forming agent), sodium citrate (complexing agent) etc. is at being grouped as.Compare Chinese invention patent (publication number
CN103205740A) " galvanized chromium-free blue-white deactivator " disclose containing molybdate, cobalt salt, sodium citrate patent formulation,
A kind of galvanized chromium-free blue-white deactivator of Chinese invention patent (publication number CN103243320A) is disclosed containing molybdate, cobalt
Salt, sodium citrate, phytic acid (secondary complexing agent) also added sodium phosphate and increase its corrosion resistance.Chinese invention patent (publication number
CN103255404A) disclose containing silicate, sodium citrate, cobalt salt patent formulation, formula passivating film is presented directly
Decorative requirement is often not achieved in misty blue and white.And contain film forming accelerating potassium permanganate in the present invention, permanganic acid
The strong oxidizing property of potassium plays the role of bleaching, and the number of the amount of potassium permanganate makes the blue journey in passivating film in inventive formulation
Degree is in a controllable range, and by lot of experiment validation, when the amount of potassium permanganate is 1.8g/L, passivating film is in dyestuff grade
Other sky blue, compared to blue and white misty caused by other Chrome-free blue-white deactivators on the market, the invention enables blunt
Changing film presentation sky blue gives pleasurable feeling, can reach the requirement of high-decoration.
Summary of the invention
The present invention successfully replaces chromate with molybdate, is made galvanized layer chromium-free sky blue passivator, in passivator not
Contain Cr6+、Cr3+So that zinc coating passivation film asepsis environment-protecting, reduces the cost of passivator, finds after tested, the passivator
It can stablize, obtained passivating film color is vivid, the corrosion resistance of passivating film is improved, through GB/T 10125-2012 neutral salt spray test
Measurement, plating piece generate the white rust time more than for 24 hours.
Galvanized layer chromium-free sky blue passivator produced by the invention, solves asking for the pollution of chromium generated in production process
Topic.The object of the invention is also to provide the manufacturing methods of galvanized layer chromium-free sky blue passivator, both solved production process and
The pollution of chromium problem of product itself also obtains the better galvanizing production of corrosion resisting property in wider opereating specification.
The purpose of the present invention is achieved by the following technical programs: green galvanized chromium-free sky blue passivator of the invention is adopted
It is dissolved and is uniformly mixed by certain proportion with sodium molybdate, malonic acid, nickel sulfate, phytic acid, potassium permanganate, neopelex
It forms, the corrosion resisting property of coating can be significantly improved, while assigning bright sky blue.
A kind of preparation method of green galvanized chromium-free sky blue passivator, it is characterised in that including following sodium molybdate 40 ~
50g/L, 8 ~ 12g/L of malonic acid, 1.0 ~ 1.5g/L of nickel sulfate, 8 ~ 12mL/L of phytic acid, 1.3 ~ 2.0g/L of potassium permanganate, dodecyl
1.8 ~ 2.2g/L of benzene sulfonic acid sodium salt, remaining is pure water.
Specific preparation method of the invention includes following sequential steps:
A. by beaker and glass bar pure water；
B. the sodium molybdate of calculation amount is poured into the beaker for filling a small amount of pure water, dissolves it sufficiently with glass bar stirring；
C. the malonic acid of calculation amount is poured into b liquid, is stirred evenly；
D. the neopelex of calculation amount is poured into c liquid, is stirred evenly；
E. the nickel sulfate of calculation amount is poured into d liquid, is stirred evenly；
F. the phytic acid of calculation amount is poured into e liquid, is stirred evenly；
G. it by the potassium permanganate liquid of falling f of calculation amount, stirs evenly；
H. by after the pure water constant volume of calculation amount, ten minutes are stood, with nitre acid for adjusting pH value 1.5.
The resulting green galvanized chromium-free sky blue passivator of the present invention, to clarify shallow carmetta liquid.
Description of test
After the present invention is by zinc-plated experiment, implement Passivation Treatment in Chrome-free sky blue passivating solution, by the processing of different time
Afterwards, tint is observed, and carries out neutral salt spray test and measures its corrosion resisting property.
Specific embodiment
The specific implementation step of the present embodiment is as follows:
A. general sylvite galvanized solution is prepared, and adjusts pH value, carries out sample pre-treatments, plating；
B. sample is taken out after a certain period of time, carries out Passivation Treatment after going out light in 3% nitric acid.Passivation time is 30s；
C. the color of passivation film is observed, and carries out neutral salt spray test.
A kind of technological specification of green galvanized chromium-free sky blue passivator are as follows:
Sodium molybdate 45g/L
Malonic acid 10g/L
Nickel sulfate 1.2g/L
Phytic acid 10ml/L
Potassium permanganate 1.8g/L
Neopelex 2g/L
pH 1.5
Temperature room temperature
Passivation time 30s
Note: it should be noted that stirring when passivation.
Claims (1)
1. a kind of preparation method of green galvanized chromium-free sky blue passivator, it is characterised in that including following 40 ~ 50g/ of sodium molybdate
L, 8 ~ 12g/L of malonic acid, 1.0 ~ 1.5g/L of nickel sulfate, 8 ~ 12mL/L of phytic acid, 1.3 ~ 2.0g/L of potassium permanganate, detergent alkylate sulphur
Sour 1.8 ~ 2.2g/L of sodium, remaining is pure water；Its preparation process is as follows:
(a) by beaker and glass bar pure water；
(b) sodium molybdate of calculation amount is poured into the beaker for filling a small amount of pure water, dissolves it sufficiently with glass bar stirring；
(c) malonic acid of calculation amount is poured into b liquid, is stirred evenly；
(d) neopelex of calculation amount is poured into c liquid, is stirred evenly；
(e) nickel sulfate of calculation amount is poured into d liquid, is stirred evenly；
(f) phytic acid of calculation amount is poured into e liquid, is stirred evenly；
(g) it by the potassium permanganate liquid of falling f of calculation amount, stirs evenly；
(h) by after the pure water constant volume of calculation amount, ten minutes are stood, with nitre acid for adjusting pH value 1.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811419158.7A CN109280914A (en) | 2018-11-26 | 2018-11-26 | A kind of preparation method of green galvanized chromium-free sky blue passivator |
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| CN201811419158.7A CN109280914A (en) | 2018-11-26 | 2018-11-26 | A kind of preparation method of green galvanized chromium-free sky blue passivator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5125989A (en) * | 1989-04-21 | 1992-06-30 | Henkel Corporation | Method and composition for coating aluminum |
| CN103243320A (en) * | 2013-05-16 | 2013-08-14 | 山东建筑大学 | Zinc plating chrome-free blue-white passivator |
| CN103695888A (en) * | 2013-12-24 | 2014-04-02 | 石磊 | Army green zinc-coated chrome-free passivator I for bondy pipe |
| CN104018148A (en) * | 2014-06-25 | 2014-09-03 | 钱宏彬 | Batch hot-dip galvanizing chromium-free passivator and application method thereof |
| CN105483674A (en) * | 2015-12-17 | 2016-04-13 | 山东建筑大学 | Treatment method for brown surface of office furniture |
| CN105779988A (en) * | 2016-05-27 | 2016-07-20 | 太原工业学院 | Chromate-free passivation solution for electroplated zinc and passivation technology thereof |
-
2018
- 2018-11-26 CN CN201811419158.7A patent/CN109280914A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5125989A (en) * | 1989-04-21 | 1992-06-30 | Henkel Corporation | Method and composition for coating aluminum |
| CN103243320A (en) * | 2013-05-16 | 2013-08-14 | 山东建筑大学 | Zinc plating chrome-free blue-white passivator |
| CN103695888A (en) * | 2013-12-24 | 2014-04-02 | 石磊 | Army green zinc-coated chrome-free passivator I for bondy pipe |
| CN104018148A (en) * | 2014-06-25 | 2014-09-03 | 钱宏彬 | Batch hot-dip galvanizing chromium-free passivator and application method thereof |
| CN105483674A (en) * | 2015-12-17 | 2016-04-13 | 山东建筑大学 | Treatment method for brown surface of office furniture |
| CN105779988A (en) * | 2016-05-27 | 2016-07-20 | 太原工业学院 | Chromate-free passivation solution for electroplated zinc and passivation technology thereof |
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Application publication date: 20190129 |
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