CN110205616A - Ferrous metal passivator and preparation method thereof - Google Patents
Ferrous metal passivator and preparation method thereof Download PDFInfo
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- CN110205616A CN110205616A CN201910569096.6A CN201910569096A CN110205616A CN 110205616 A CN110205616 A CN 110205616A CN 201910569096 A CN201910569096 A CN 201910569096A CN 110205616 A CN110205616 A CN 110205616A
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- China
- Prior art keywords
- passivator
- ferrous metal
- benzotriazole
- metal passivator
- polyvinylpyrrolidone
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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
- 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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- Chemical & Material Sciences (AREA)
- 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 a kind of ferrous metal passivator, are made of following raw material: chromium sulfate 50-60, chromic nitrate 8-10, complexing agent 5-7, corrosion inhibitor 4-6, ammonium molybdate 7-9, cobaltous sulfate 3-5, polyvinylpyrrolidone 6-8, benzotriazole 10-12, polyacrylamide 8-12, water 700-800.Benzotriazole and polyvinylpyrrolidone are added in ferrous metal passivator of the invention; benzotriazole can prevent oxygen and passivator in air from reacting; polyvinylpyrrolidone guarantees that passivator forms one layer of compact and complete protective film in metal surface; the two cooperation, greatly improves the corrosion resistance of passivating film.
Description
Technical field
The present invention relates to technical field of metal corrosion protection more particularly to a kind of ferrous metal passivator and preparation method thereof.
Background technique
In order to improve the corrosion resistance of metallic article, zinc-plated processing usually is carried out on its surface.For zinc coat, zinc category
In more active metal, it is all easily chemically reacted very much with acidic materials, alkaline matter, if so do not taken after zinc-plated blunt
Phenomena such as change treatment measures, chemical stain, destruction, corrosion will occurs in it quickly.In order to further increase coating Corrosion Protection
And dicoration, the techniques such as brushing paint of conventionally employed electrostatic powder coating and high pollution environment, but process above is used for a long time
Coating film and skin of paint are easy to fall off afterwards.In order to further increase coating Corrosion Protection and dicoration, coating must carry out blunt
Change processing, to produce the passivating film of one layer of corrosion resistance height, good decorative property.Since pollution of the Cr VI to environment is more serious,
Substantially metal surface is passivated using trivalent chromium now.But existing trivalent chromium passivator poor corrosion resistance, passivation
Film is more easily damaged.How to design a kind of ferrous metal passivator and preparation method thereof is that technology to be solved by this invention is asked
Topic.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of ferrous metal passivator and preparation method thereof.
The present invention is realized by following technological means solves above-mentioned technical problem:
A kind of ferrous metal passivator, is made of following raw material: chromium sulfate 50-60, chromic nitrate 8-10, complexing agent
5-7, corrosion inhibitor 4-6, ammonium molybdate 7-9, cobaltous sulfate 3-5, polyvinylpyrrolidone 6-8, benzotriazole 10-12, poly- third
Acrylamide 8-12, water 700-800；
Preferably, a kind of ferrous metal passivator, the complexing agent are citric acid.
Preferably, a kind of ferrous metal passivator, the corrosion inhibitor are fluorine zirconic acid.
A kind of preparation method of black passivator, comprising the following steps:
S1,75-85 DEG C is heated water to, chromium sulfate, chromic nitrate is added, stir 30-40min；
S2, complexing agent, corrosion inhibitor, polyvinylpyrrolidone, benzotriazole, polyacrylamide is added, stirs 15-
2h is kept the temperature after 20min；
S3, it is cooled to 50-55 DEG C, ammonium molybdate, cobaltous sulfate is added, stir 30-40min to get ferrous metal passivator is arrived.
The present invention has the advantages that adding benzotriazole and polyvinylpyrrolidine in ferrous metal passivator of the invention
Ketone, benzotriazole can prevent oxygen and passivator in air from reacting, and polyvinylpyrrolidone guarantees that passivator exists
Metal surface forms one layer of compact and complete protective film, and the two cooperation greatly improves the corrosion resistance of passivating film.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in the embodiment of the present invention
Technical solution is clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than complete
The embodiment in portion.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1, a kind of ferrous metal passivator are made of following parts by weight (kg) raw material: chromium sulfate 55, chromic nitrate 9,
Complexing agent 6, corrosion inhibitor 5, ammonium molybdate 8, cobaltous sulfate 4, polyvinylpyrrolidone 7, benzotriazole 11, polyacrylamide
10, water 750；
Preferably, the complexing agent is citric acid.
Preferably, the corrosion inhibitor is fluorine zirconic acid.
A kind of preparation method of black passivator, comprising the following steps:
S1,80 DEG C are heated water to, chromium sulfate, chromic nitrate is added, stir 35min；
S2, complexing agent, corrosion inhibitor, polyvinylpyrrolidone, benzotriazole, polyacrylamide, stirring is added
2h is kept the temperature after 18min；
S3,53 DEG C are cooled to, ammonium molybdate, cobaltous sulfate is added, stir 35min to get ferrous metal passivator is arrived.
Embodiment 2, a kind of ferrous metal passivator are made of following parts by weight (kg) raw material: chromium sulfate 55, chromic nitrate 9,
Complexing agent 6, corrosion inhibitor 5, ammonium molybdate 8, cobaltous sulfate 4, polyvinylpyrrolidone 7, polyacrylamide 10, water 750；
A kind of preparation method of black passivator, comprising the following steps:
S1,80 DEG C are heated water to, chromium sulfate, chromic nitrate is added, stir 35min；
S2, complexing agent, corrosion inhibitor, polyvinylpyrrolidone, polyacrylamide is added, keeps the temperature 2h after stirring 18min；
S3,53 DEG C are cooled to, ammonium molybdate, cobaltous sulfate is added, stir 35min to get ferrous metal passivator is arrived.
Embodiment 3, a kind of ferrous metal passivator are made of following parts by weight (kg) raw material: chromium sulfate 55, chromic nitrate 9,
Complexing agent 6, corrosion inhibitor 5, ammonium molybdate 8, cobaltous sulfate 4, benzotriazole 11, polyacrylamide 10, water 750；
S1,80 DEG C are heated water to, chromium sulfate, chromic nitrate is added, stir 35min；
S2, complexing agent, corrosion inhibitor, benzotriazole, polyacrylamide is added, keeps the temperature 2h after stirring 18min；
S3,53 DEG C are cooled to, ammonium molybdate, cobaltous sulfate is added, stir 35min to get ferrous metal passivator is arrived.
After each embodiment passivator is sprayed in zinc-plated black metal sheet, zinc-plated black metal sheet is exposed to basis
In the neutral salt spray of ASTM-B117, as a result it see the table below:
Embodiment 2 is compared and is not added with benzotriazole for embodiment 1；Embodiment 3 is poly- compared to being not added with for embodiment 1
Vinylpyrrolidone；As can be seen from the above table, the passivator of embodiment 2 and embodiment 3 is sprayed in zinc-plated black metal sheet
Afterwards, metal erosion fast speed is corroded more serious；And after the passivator of embodiment 1 is sprayed in zinc-plated black metal sheet, metal
Corrosion rate is slower, and surface corrosion is lighter.
It should be noted that, in this document, such as first and second or the like relational terms are used merely to one if it exists
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (4)
1. a kind of ferrous metal passivator, which is characterized in that be made of following raw material: chromium sulfate 50-60, chromic nitrate 8-
10, complexing agent 5-7, corrosion inhibitor 4-6, ammonium molybdate 7-9, cobaltous sulfate 3-5, polyvinylpyrrolidone 6-8, benzotriazole
10-12, polyacrylamide 8-12, water 700-800.
2. a kind of ferrous metal passivator according to claim 1, it is characterised in that: the complexing agent is citric acid.
3. a kind of ferrous metal passivator according to claim 1, it is characterised in that: the corrosion inhibitor is fluorine zirconium
Acid.
4. a kind of preparation method of the black passivator as described in claim any one of 1-3, which is characterized in that including following step
It is rapid:
S1,75-85 DEG C is heated water to, chromium sulfate, chromic nitrate is added, stir 30-40min；
S2, complexing agent, corrosion inhibitor, polyvinylpyrrolidone, benzotriazole, polyacrylamide is added, stirs 15-
2h is kept the temperature after 20min；
S3, it is cooled to 50-55 DEG C, ammonium molybdate, cobaltous sulfate is added, stir 30-40min to get ferrous metal passivator is arrived.
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| CN201910569096.6A CN110205616A (en) | 2019-06-27 | 2019-06-27 | Ferrous metal passivator and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561970A (en) * | 2014-12-31 | 2015-04-29 | 苏州禾川化学技术服务有限公司 | Corrosion-resistant magnesium aluminum alloy chromium-free passivation solution |
| CN107236948A (en) * | 2017-06-07 | 2017-10-10 | 广州传福化学技术有限公司 | It is a kind of to suppress the passivator that zinc coating trivalent chromium is oxidized to Cr VI |
| CN108300988A (en) * | 2018-01-18 | 2018-07-20 | 长沙艾森设备维护技术有限公司 | A kind of compound chrome-free tanning agent and preparation method of fast filming |
-
2019
- 2019-06-27 CN CN201910569096.6A patent/CN110205616A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561970A (en) * | 2014-12-31 | 2015-04-29 | 苏州禾川化学技术服务有限公司 | Corrosion-resistant magnesium aluminum alloy chromium-free passivation solution |
| CN107236948A (en) * | 2017-06-07 | 2017-10-10 | 广州传福化学技术有限公司 | It is a kind of to suppress the passivator that zinc coating trivalent chromium is oxidized to Cr VI |
| CN108300988A (en) * | 2018-01-18 | 2018-07-20 | 长沙艾森设备维护技术有限公司 | A kind of compound chrome-free tanning agent and preparation method of fast filming |
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Application publication date: 20190906 |