CN108707884A - A kind of chromium-free passivation liquid and its configuration method - Google Patents
A kind of chromium-free passivation liquid and its configuration method Download PDFInfo
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- CN108707884A CN108707884A CN201810322684.5A CN201810322684A CN108707884A CN 108707884 A CN108707884 A CN 108707884A CN 201810322684 A CN201810322684 A CN 201810322684A CN 108707884 A CN108707884 A CN 108707884A
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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
- C23C22/07—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 phosphates
- C23C22/08—Orthophosphates
- C23C22/12—Orthophosphates containing zinc cations
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Abstract
The present invention discloses a kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 5-35w%, phytic acid 1-15ML/L, phosphatase 11-20ML/L, zinc ion 1-8g/L, remaining is water.And its configuration method.The present invention is collectively constituted the film forming matter of passivating film by aqueous functional siloxane oligomer and phytic acid.Phosphoric acid and zinc ion composition auxiliary film forming.The formula of the present invention is entirely free of chromium, more environmentally-friendly.Pollution of chromium caused by current chromium passivating can be solved the problems, such as through the invention, be a environmentally friendly passivating solution without any heavy metal.
Description
Technical field
The present invention relates to metal passivation field more particularly to a kind of chromium-free passivation liquids.
Background technology
Steel-iron components will usually be passivated processing after electrogalvanizing or galvanizing, white to prevent from generating in the short time
Rust.
Traditional metal inactivating solution is passivated metal using trivalent chromium, and this passivating solution can cause environment serious
Pollution, the strict demand with many countries to environmental protection standard, electroplating industry more and more need a kind of passivating solution of Chrome-free.
Invention content
The object of the present invention is to provide a kind of chromium-free passivation liquids.The invention is chromium-free passivation liquid, not only the passivating solution service life
Height, passivating process is easy to control, and the product with stable quality produced using the passivating solution, and the corrosion resistance of passivating film is preferable, simultaneously
Also have the characteristics that environmental pollution is low.
Technical solution of the present invention：
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 5-35w%, phytic acid 1-15ML/L, phosphoric acid
1-20ML/L, zinc ion 1-8g/L, remaining is water.
Aforementioned chromium-free passivation liquid includes following substances：Aqueous functional siloxane oligomer 8-32w%, phytic acid 3-13ML/L, phosphorus
Sour 3-18ML/L, zinc ion 4-6g/L, remaining is water.
Aforementioned chromium-free passivation liquid includes following substances：Aqueous functional siloxane oligomer 10-30w%, phytic acid 5-10ML/L,
Phosphoric acid 5-15ML/L, zinc ion 3-5g/L, remaining is water.
The phytic acid concentration is 0.5-1%.
The phosphoric acid concentration is 0.5-1.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In abovementioned steps D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In abovementioned steps F, phytic acid is slowly added in reaction kettle.
The configuration method of aforementioned chromium-free passivation liquid further includes：Step H is examined, and closes blender, and sampling is examined with Baume Hydrometer
Solution concentration is measured, criterion of acceptability is 23-25 lattice.
Compared with prior art, the present invention is collectively constituted the film forming of passivating film by aqueous functional siloxane oligomer and phytic acid
Object.Phosphoric acid and zinc ion composition auxiliary film forming.The formula of the present invention is entirely free of chromium, more environmentally-friendly.Through the invention may be used
Pollution of chromium caused by solve the problems, such as current chromium passivating is a environmentally friendly passivating solution without any heavy metal.
It is tested through applicant, formula through the invention, controls the parameters such as passivation concentration, PH values, time, can obtain
Performance stablizes anti-corrosion excellent passivating film, complies fully with ROHS standards, and the electroplated product white rust of resistance to neutral salt spray test 96 is small
When, red rust 240 hours or more.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
With reference to embodiment, the present invention will be further described, but is not intended as the foundation limited the present invention.
Embodiment 1
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 5-35w%, phytic acid 1-15ML/L, phosphoric acid
1-20ML/L, zinc ion 1-8g/L, remaining is water.
Aforementioned chromium-free passivation liquid includes following substances：Aqueous functional siloxane oligomer 8-32w%, phytic acid 3-13ML/L, phosphorus
Sour 3-18ML/L, zinc ion 4-6g/L, remaining is water.
Aforementioned chromium-free passivation liquid includes following substances：Aqueous functional siloxane oligomer 10-30w%, phytic acid 5-10ML/L,
Phosphoric acid 5-15ML/L, zinc ion 3-5g/L, remaining is water.
The phytic acid concentration is 0.5-1%.
The phosphoric acid concentration is 0.5-1.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
The configuration method step of the chromium-free passivation liquid further includes：Step H is examined, and closes blender, sampling Baume Hydrometer
It examines and measures solution concentration, criterion of acceptability is 23-25 lattice.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 2
A kind of chromium-free passivation liquid includes following substances：Aqueous functional siloxane oligomer 8-32w%, phytic acid 3-13ML/L, phosphoric acid 3-
18ML/L, zinc ion 4-6g/L, remaining is water.
The phytic acid concentration is 0.5-1%.
The phosphoric acid concentration is 0.5-1.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 3
A kind of chromium-free passivation liquid includes following substances：Aqueous functional siloxane oligomer 10-30w%, phytic acid 5-10ML/L, phosphoric acid
5-15ML/L, zinc ion 3-5g/L, remaining is water.
The phytic acid concentration is 0.5-1%.
The phosphoric acid concentration is 0.5-1.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 4
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 5w%, phytic acid 1ML/L, phosphatase 11 ML/L,
Zinc ion 1g/L, remaining is water.
The phytic acid concentration is 0.5%.
The phosphoric acid concentration is 0.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
The configuration method step of the chromium-free passivation liquid further includes：Step H is examined, and closes blender, sampling Baume Hydrometer
It examines and measures solution concentration, criterion of acceptability is 23-25 lattice.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 5
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 35w%, phytic acid 15ML/L, phosphoric acid 20ML/
L, zinc ion 8g/L, remaining is water.
The phytic acid concentration is 1%.
The phosphoric acid concentration is 1.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
The configuration method step of the chromium-free passivation liquid further includes：Step H is examined, and closes blender, sampling Baume Hydrometer
It examines and measures solution concentration, criterion of acceptability is 23-25 lattice.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 6
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 8w%, phytic acid 3ML/L, phosphoric acid 3ML/L,
Zinc ion 4g/L, remaining is water.
The phytic acid concentration is 0.5%.
The phosphoric acid concentration is 0.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
The configuration method step of the chromium-free passivation liquid further includes：Step H is examined, and closes blender, sampling Baume Hydrometer
It examines and measures solution concentration, criterion of acceptability is 23-25 lattice.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 7
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 32w%, phytic acid 13ML/L, phosphatase 11 8ML/
L, zinc ion 6g/L, remaining is water.
The phytic acid concentration is 1%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
The configuration method step of the chromium-free passivation liquid further includes：Step H is examined, and closes blender, sampling Baume Hydrometer
It examines and measures solution concentration, criterion of acceptability is 23-25 lattice.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 8
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 10w%, phytic acid 5ML/L, phosphoric acid 5ML/L,
Zinc ion 3g/L, remaining is water.
The phytic acid concentration is 0.5%.
The phosphoric acid concentration is 0.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
The configuration method step of the chromium-free passivation liquid further includes：Step H is examined, and closes blender, sampling Baume Hydrometer
It examines and measures solution concentration, criterion of acceptability is 23-25 lattice.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
Embodiment 9
A kind of chromium-free passivation liquid, including following substances：Aqueous functional siloxane oligomer 30w%, phytic acid 10ML/L, phosphatase 11 5ML/
L, zinc ion 5g/L, remaining is water.
The phytic acid concentration is 1%.
The phosphoric acid concentration is 1.5%.
A kind of configuration method of aforementioned chromium-free passivation liquid, including step：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
In the step D, aqueous functional siloxane oligomer is slowly added in reaction kettle.
In the step F, phytic acid is slowly added in reaction kettle.
The configuration method step of the chromium-free passivation liquid further includes：Step H is examined, and closes blender, sampling Baume Hydrometer
It examines and measures solution concentration, criterion of acceptability is 23-25 lattice.
It is covered by roller or the method for dip-coating or spray, passivating solution of the present invention is uniformly coated in Several Thiourea Derivatives on Zinc Plate Surface, is then dried
Dry passivating solution makes passivating solution pass through self assembly mode and is securely adsorbed on coating surface, forms high corrosion-resistant passivation film, passivating film
Neutral salt spray can reach 96 hours or more.
Formula through the invention controls passivation concentration, PH values, the parameters such as time, can obtain performance stablize it is anti-corrosion excellent
Good passivating film complies fully with ROHS standards, the electroplated product white rust of resistance to neutral salt spray test 96 hours, red rust 240 hours
More than.
The passivating solution configuration method of the present invention can safely and fast be efficiently completed passivating solution configuration, in configuration process
Fully consider heat dissipation problem, it will not be because of the excessively thermally-induced production accident of solution, securely and reliably.And on safe and reliable basis
On, the reaction time is controlled, the configuration of passivating solution can be rapidly and efficiently completed.
In the description of this specification, the description of term " one embodiment " etc. means that the embodiment or example is combined to describe
Particular features, structures, materials, or characteristics be included at least one embodiment or example of the invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more of the embodiments or examples.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of chromium-free passivation liquid, which is characterized in that including following substances：Aqueous functional siloxane oligomer 5-35w%, phytic acid
1-15ML/L, phosphatase 11-20ML/L, zinc ion 1-8g/L, remaining is water.
2. chromium-free passivation liquid according to claim 1, which is characterized in that including following substances：Aqueous functional siloxanes is low
Polymers 8-32w%, phytic acid 3-13ML/L, phosphoric acid 3-18ML/L, zinc ion 4-6g/L, remaining is water.
3. chromium-free passivation liquid according to claim 2, which is characterized in that including following substances：Aqueous functional siloxanes is low
Polymers 10-30w%, phytic acid 5-10ML/L, phosphoric acid 5-15ML/L, zinc ion 3-5g/L, remaining is water.
4. chromium-free passivation liquid according to claim 1, it is characterised in that：The phytic acid concentration is 0.5-1%.
5. chromium-free passivation liquid according to claim 1, it is characterised in that：The phosphoric acid concentration is 0.5-1.5%.
6. a kind of method of chromium-free passivation liquid described in configuration claim 1-5 any claims, which is characterized in that including step
Suddenly：
A. it stocks up, according to formula, prepares raw material；
B. for water, needed for formula 1/3 water is added in a kettle；
C. acid adding is added required phosphoric acid, obtains product c in a kettle；
D. plus silicon is added required aqueous functional siloxane oligomer, obtains product d in a kettle；
E. it stirs, opens the agitating device in reaction kettle, be stirred with 2900 revs/min of rates,；
F. it feeds, phytic acid and zinc ion is added in a kettle, obtains product f；
G. plus remaining water is added in a kettle in water, obtains final product h.
7. the configuration method of chromium-free passivation liquid according to claim 6, which is characterized in that in the step D, by aqueous work(
Energy siloxane oligomer is slowly added in reaction kettle.
8. the configuration method of chromium-free passivation liquid according to claim 6, which is characterized in that in the step F, phytic acid is delayed
It is slow to be added in reaction kettle.
9. the configuration method of chromium-free passivation liquid according to claim 6, which is characterized in that the configuration of the chromium-free passivation liquid
Method method further includes：Step H is examined, and closes blender, and sampling is examined with Baume Hydrometer and measures solution concentration, and criterion of acceptability is
23-25 lattice.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102639750A (en) * | 2009-12-04 | 2012-08-15 | 汉高股份有限及两合公司 | Multi-stage pre-treatment method for metal components having zinc and iron surfaces |
| CN103906859A (en) * | 2011-11-03 | 2014-07-02 | 巴斯夫欧洲公司 | Preparation for passivating metal surfaces, containing polymers having acid groups and containing Ti or Zr compounds |
| CN104451637A (en) * | 2014-11-14 | 2015-03-25 | 无锡伊佩克科技有限公司 | Metal surface chromium-free passivation solution and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102639750A (en) * | 2009-12-04 | 2012-08-15 | 汉高股份有限及两合公司 | Multi-stage pre-treatment method for metal components having zinc and iron surfaces |
| CN103906859A (en) * | 2011-11-03 | 2014-07-02 | 巴斯夫欧洲公司 | Preparation for passivating metal surfaces, containing polymers having acid groups and containing Ti or Zr compounds |
| CN104451637A (en) * | 2014-11-14 | 2015-03-25 | 无锡伊佩克科技有限公司 | Metal surface chromium-free passivation solution and preparation method thereof |
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