CN105256298A - Efficient and environment-friendly chromate-free passivation solution and preparation method thereof - Google Patents
Efficient and environment-friendly chromate-free passivation solution and preparation method thereof Download PDFInfo
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- CN105256298A CN105256298A CN201510725271.8A CN201510725271A CN105256298A CN 105256298 A CN105256298 A CN 105256298A CN 201510725271 A CN201510725271 A CN 201510725271A CN 105256298 A CN105256298 A CN 105256298A
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Abstract
The invention discloses an efficient and environment-friendly chromate-free passivation solution and a preparation method thereof. The efficient and environment-friendly chromate-free passivation solution comprises the following components of 35-40 g/L of molybdenum phosphate, 10-20 g/L of sodium vanadate, 8-12 g/L of sodium tungstate, 10-100 g/L of phytic acid, 3-30 g/L of tartaric acid, 5-50 g/L of gallotannic acid, 10-50 g/L of poly trimethyl ethyoxyl modified epoxy resin, 6-8 g/L of corrosion and scale inhibitor, 3-6 g/L of sealant, 10-15 g/L of film-forming agent, 0.5-3 g/L of anti-oxidant or oxidation inhibiter and 3-7 g/L of aluminium triphosphate. Through reasonable formula design, the passivation solution contains no chromium ions of any valence state, and has the characteristics of safety and environment friendliness, meanwhile, the passivation solution has the excellent passivation performance, film forming performance and rust resistance, and comprehensive and efficient corrosion resistance is given to a zinc coating. The characteristic of the low cost is achieved from the formula technology to the preparation technology, and the development and application prospects are wide.
Description
Technical field
The present invention relates to passivating technique field, particularly relate to a kind of high-efficiency environment friendly chromium-free passivation liquid and preparation method thereof.
Background technology
Steel plate galvanized is widely used in the fields such as building, household electrical appliances and automobile.Inhibitor of metal zinc electrode current potential is lower, when there is corrosion in a humidity environment, carries out electro-chemical protection as anode to steel substrate.But zinc layers, only under the condition of dry non-corrosiveness atmosphere, could provide reliable protection to steel substrate.Under the storage working conditions of reality, zinc layers surface can produce condensation, causes and gets rusty or variable color.Therefore, Passivation Treatment must be carried out to zinc coating, to improve its corrosion resistance.
The features such as employing chromating is the common method of galvanized sheet passivation, has technique simple, good passivation effect, and resistance to auxiliary corrosive nature is excellent.But, due to Cr
6+to the organism comprising human body, there is fatal toxic, be the number one killer of environmental pollution, extensively limited use in the world.WES and ROHS instruction clearly proposes the chromic use of restriction.
The passivation of existing domestic chromium-free passivation liquid organic/inorganic substance, organism passivation and organic-inorganic composite body passivation three types.No matter which kind of passivation type, still there is the effect that erosion resistance does not far reach chromating, and cost is higher.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of high-efficiency environment friendly chromium-free passivation liquid and preparation method thereof, can solve the problems referred to above that existing chromium-free passivation liquid exists.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of high-efficiency environment friendly chromium-free passivation liquid, comprise following component: phosphomolybd 35 ~ 40g/L, vanadic acid sodium 10 ~ 20g/L, sodium wolframate 8 ~ 12g/L, phytic acid 10 ~ 100g/L, tartrate 3 ~ 30g/L, Weibull 5 ~ 50g/L, poly-trimethylammonium oxyethyl group modified epoxy 10 ~ 50g/L, corrosion inhibiting and descaling agent 6 ~ 8g/L, hole sealing agent 3 ~ 6g/L, membrane-forming agent 10 ~ 15g/L, antioxidant additive 0.5 ~ 3g/L, aluminium triphosphate 3 ~ 7g/L.
In a preferred embodiment of the present invention, described phosphomolybd is mass ratio is the molybdophosphate sodium of 1:2 ~ 3 and the mixture of molybdophosphate.
In a preferred embodiment of the present invention, described membrane-forming agent is the mixture that water glass, Sodium Silicofluoride and sodium sulfate mix with the mass ratio of 2 ~ 3:1 ~ 2:1.
In a preferred embodiment of the present invention, described hole sealing agent is positive silicic acid.
In a preferred embodiment of the present invention, described antioxidant additive is right, to the mixture that a di-iso-octyldiphenylamine and mineral oil mix with the ratio of 1:1.
For solving the problems of the technologies described above, another technical solution used in the present invention is: the preparation method providing a kind of high-efficiency environment friendly chromium-free passivation liquid, comprises the steps:
(1) take poly-trimethylammonium oxyethyl group modified epoxy by formula, phytic acid, antioxidant additive add in deionized water, heated and stirred, to dissolving completely, obtains the first mixture;
(2) in the first mixture in step (1), add the tartrate of formula ratio, Weibull, corrosion inhibiting and descaling agent and hole sealing agent, heating is mix and blend also, obtains the second mixture;
(3) in the second mixture in step (2), add the phosphomolybd of formula ratio, vanadic acid sodium, sodium wolframate and aluminium triphosphate, heating is mix and blend also, obtains the 3rd mixture;
(4) in the 3rd mixture in step (3), add the membrane-forming agent of formula ratio, heating and mix and blend after, constant temperature place 1 ~ 3h, after cooling, obtain described chromium-free passivation liquid;
In a preferred embodiment of the present invention, in described step (1), described Heating temperature is 70 ~ 80 DEG C, and stir speed (S.S.) is 30 ~ 50r/min.
In a preferred embodiment of the present invention, in described step (2) ~ (4), described Heating temperature is 40 ~ 60 DEG C, and stir speed (S.S.) is 50 ~ 200r/min.
The invention has the beneficial effects as follows: the preparation method of a kind of high-efficiency environment friendly of the present invention chromium-free passivation liquid is easy, easy realization, it is by rational formulating of recipe, make passivating solution not containing the chromium ion of any valence state, possesses the characteristic of safety and environmental protection, this passivating solution also possesses excellent inactivating performance, moulding property and rust-preventing characteristic simultaneously, gives zinc coating comprehensive high-efficiency antiseptic property; The present invention all possesses characteristic with low cost from formula to preparation technology, and development prospect is wide.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The embodiment of the present invention comprises:
Embodiment 1
A kind of high-efficiency environment friendly chromium-free passivation liquid, comprises following component: phosphomolybd 35g/L, vanadic acid sodium 10g/L, sodium wolframate 8g/L, phytic acid 10g/L, tartrate 30g/L, Weibull 50g/L, poly-trimethylammonium oxyethyl group modified epoxy 10g/L, corrosion inhibiting and descaling agent 6g/L, hole sealing agent 3g/L, membrane-forming agent 10g/L, antioxidant additive 0.5g/L, aluminium triphosphate 3g/L; Wherein, described phosphomolybd is mass ratio is the molybdophosphate sodium of 1:2 and the mixture of molybdophosphate; Described membrane-forming agent is the mixture that water glass, Sodium Silicofluoride and sodium sulfate mix with the mass ratio of 2:1:1; Described hole sealing agent is positive silicic acid; Described antioxidant additive is right, to the mixture that a di-iso-octyldiphenylamine and mineral oil mix with the ratio of 1:1.
Preparation method's step of above-mentioned high-efficiency environment friendly chromium-free passivation liquid is as follows:
(1) take poly-trimethylammonium oxyethyl group modified epoxy by formula, phytic acid, antioxidant additive add in deionized water, be heated to 70 DEG C, be stirred to the speed of 50r/min and dissolve completely, obtain the first mixture;
(2) in the first mixture in step (1), add the tartrate of formula ratio, Weibull, corrosion inhibiting and descaling agent and hole sealing agent, be heated to 40 DEG C, and with the speed mix and blend 10min of 200r/min, make it to mix, obtain the second mixture;
(3) in the second mixture in step (2), add the phosphomolybd of formula ratio, vanadic acid sodium, sodium wolframate and aluminium triphosphate, be heated to 40 DEG C, and with the speed mix and blend 10min of 200r/min, make it to mix, obtain the 3rd mixture;
(4) in the 3rd mixture in step (3), add the membrane-forming agent of formula ratio, be heated to 40 DEG C, and with after the speed mixing and stirring of 200r/min, constant temperature leaves standstill places 3h, after cooling, obtains described chromium-free passivation liquid.
Embodiment 2
A kind of high-efficiency environment friendly chromium-free passivation liquid, comprises following component: phosphomolybd 40g/L, vanadic acid sodium 20g/L, sodium wolframate 12g/L, phytic acid 100g/L, tartrate 3g/L, Weibull 5g/L, poly-trimethylammonium oxyethyl group modified epoxy 50g/L, corrosion inhibiting and descaling agent 8g/L, hole sealing agent 6g/L, membrane-forming agent 15g/L, antioxidant additive 3g/L, aluminium triphosphate 7g/L; Wherein, described phosphomolybd is mass ratio is the molybdophosphate sodium of 1:3 and the mixture of molybdophosphate; Described membrane-forming agent is the mixture that water glass, Sodium Silicofluoride and sodium sulfate mix with the mass ratio of 3:2:1; Described hole sealing agent is positive silicic acid; Described antioxidant additive is right, to the mixture that a di-iso-octyldiphenylamine and mineral oil mix with the ratio of 1:1.
Preparation method's step of above-mentioned high-efficiency environment friendly chromium-free passivation liquid is as follows:
(1) take poly-trimethylammonium oxyethyl group modified epoxy by formula, phytic acid, antioxidant additive add in deionized water, be heated to 80 DEG C, be stirred to the speed of 50r/min and dissolve completely, obtain the first mixture;
(2) in the first mixture in step (1), add the tartrate of formula ratio, Weibull, corrosion inhibiting and descaling agent and hole sealing agent, be heated to 60 DEG C, and with the speed mix and blend 30min of 50r/min, make it to mix, obtain the second mixture;
(3) in the second mixture in step (2), add the phosphomolybd of formula ratio, vanadic acid sodium, sodium wolframate and aluminium triphosphate, be heated to 60 DEG C, and with the speed mix and blend 30min of 50r/min, make it to mix, obtain the 3rd mixture;
(4) in the 3rd mixture in step (3), add the membrane-forming agent of formula ratio, be heated to 60 DEG C, and with after the speed mixing and stirring of 50r/min, constant temperature leaves standstill places 1h, after cooling, obtains described chromium-free passivation liquid.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a high-efficiency environment friendly chromium-free passivation liquid, it is characterized in that, comprise following component: phosphomolybd 35 ~ 40g/L, vanadic acid sodium 10 ~ 20g/L, sodium wolframate 8 ~ 12g/L, phytic acid 10 ~ 100g/L, tartrate 3 ~ 30g/L, Weibull 5 ~ 50g/L, poly-trimethylammonium oxyethyl group modified epoxy 10 ~ 50g/L, corrosion inhibiting and descaling agent 6 ~ 8g/L, hole sealing agent 3 ~ 6g/L, membrane-forming agent 10 ~ 15g/L, antioxidant additive 0.5 ~ 3g/L, aluminium triphosphate 3 ~ 7g/L.
2. high-efficiency environment friendly chromium-free passivation liquid according to claim 1, is characterized in that, described phosphomolybd is mass ratio is the molybdophosphate sodium of 1:2 ~ 3 and the mixture of molybdophosphate.
3. high-efficiency environment friendly chromium-free passivation liquid according to claim 1, is characterized in that, described membrane-forming agent is the mixture that water glass, Sodium Silicofluoride and sodium sulfate mix with the mass ratio of 2 ~ 3:1 ~ 2:1.
4. high-efficiency environment friendly chromium-free passivation liquid according to claim 1, is characterized in that, described hole sealing agent is positive silicic acid.
5. high-efficiency environment friendly chromium-free passivation liquid according to claim 1, is characterized in that, described antioxidant additive is right, to the mixture that a di-iso-octyldiphenylamine and mineral oil mix with the ratio of 1:1.
6. a preparation method for high-efficiency environment friendly chromium-free passivation liquid as claimed in claim 1, is characterized in that, comprise the steps:
(1) take poly-trimethylammonium oxyethyl group modified epoxy by formula, phytic acid, antioxidant additive add in deionized water, heated and stirred, to dissolving completely, obtains the first mixture;
(2) in the first mixture in step (1), add the tartrate of formula ratio, Weibull, corrosion inhibiting and descaling agent and hole sealing agent, heating is mix and blend also, obtains the second mixture;
(3) in the second mixture in step (2), add the phosphomolybd of formula ratio, vanadic acid sodium, sodium wolframate and aluminium triphosphate, heating is mix and blend also, obtains the 3rd mixture;
(4) in the 3rd mixture in step (3), add the membrane-forming agent of formula ratio, heating and mix and blend after, constant temperature place 1 ~ 3h, after cooling, obtain described chromium-free passivation liquid;
The preparation method of high-efficiency environment friendly chromium-free passivation liquid according to claim 6, is characterized in that, in described step (1), described Heating temperature is 70 ~ 80 DEG C, and stir speed (S.S.) is 30 ~ 50r/min.
7. the preparation method of high-efficiency environment friendly chromium-free passivation liquid according to claim 6, is characterized in that, in described step (2) ~ (4), described Heating temperature is 40 ~ 60 DEG C, and stir speed (S.S.) is 50 ~ 200r/min.
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Cited By (3)
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| CN108531898A (en) * | 2018-04-11 | 2018-09-14 | 浙江康盛股份有限公司 | A kind of chromium-free passivation liquid |
| CN112226753A (en) * | 2020-09-03 | 2021-01-15 | 余姚市永林机械科技有限公司 | Passivation solution for hot galvanizing treatment process and preparation method thereof |
| CN114959675A (en) * | 2022-06-23 | 2022-08-30 | 上海聚丰热镀锌有限公司 | Silicate passivation solution and preparation method thereof |
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| US20150225856A1 (en) * | 2014-02-13 | 2015-08-13 | Ewald Doerken Ag | Method for the manufacture of a substrate provided with a chromium vi-free and cobalt-free passivation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531898A (en) * | 2018-04-11 | 2018-09-14 | 浙江康盛股份有限公司 | A kind of chromium-free passivation liquid |
| CN112226753A (en) * | 2020-09-03 | 2021-01-15 | 余姚市永林机械科技有限公司 | Passivation solution for hot galvanizing treatment process and preparation method thereof |
| CN112226753B (en) * | 2020-09-03 | 2021-12-21 | 余姚市永林机械科技有限公司 | Passivation solution for hot galvanizing treatment process and preparation method thereof |
| CN114959675A (en) * | 2022-06-23 | 2022-08-30 | 上海聚丰热镀锌有限公司 | Silicate passivation solution and preparation method thereof |
| CN114959675B (en) * | 2022-06-23 | 2023-10-03 | 上海聚丰热镀锌有限公司 | Silicate passivation solution and preparation method thereof |
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