CN105839098A - Chromium-free passivating agent for hot-dip galvanized steel sheet and preparation method for chromium-free passivating agent - Google Patents
Chromium-free passivating agent for hot-dip galvanized steel sheet and preparation method for chromium-free passivating agent Download PDFInfo
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- CN105839098A CN105839098A CN201610374261.9A CN201610374261A CN105839098A CN 105839098 A CN105839098 A CN 105839098A CN 201610374261 A CN201610374261 A CN 201610374261A CN 105839098 A CN105839098 A CN 105839098A
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- sheet steel
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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
- C23C22/48—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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/50—Treatment of iron or alloys based thereon
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- Chemical Treatment Of Metals (AREA)
Abstract
The invention specifically relates to a chromium-free passivating agent for a hot-dip galvanized steel sheet and a preparation method for the chromium-free passivating agent, and belongs to the technical field of metal surface treatment. The chromium-free passivating agent for the hot-dip galvanized steel sheet comprises the following raw materials in parts by mass: 25-40 parts of phytic acid, 8-15 parts of sodium silicate, 10-18 parts of sodium citrate, 5-16 parts of rosin resin, 15-25 parts of a polytetrafluoroethylene concentrated dispersion liquid, 6-14 parts of lignin sulfonate, 18-30 parts of alcohol and 20-30 parts of water. The chromium-free passivating agent for the hot-dip galvanized steel sheet has the advantages of being strong in corrosion resistance and good in scraping resistance, does not contain hexavalent chromium, and is environmentally friendly.
Description
Technical field
The invention belongs to field of metal surface treatment technology, be specifically related to a kind of hot-dip galvanizing sheet steel chromium-free deactivation
Agent and preparation method thereof.
Background technology
Typically in order to form protecting film in metal surface, can be passivated after plating processing, to improve corrosion resistant
Erosion ability, or obtain corresponding purpose color, or to reduce coefficient of friction.
Use traditional Cr VI passivator can be effectively improved the corrosion resistance of metal, but Cr VI is harmful to body
Body is healthy and pollutes environment, is gradually eliminated.Plus the implementation of RoHS instruction, people are constantly at research Chrome-free
Passivator.RoHS instructs, i.e. " electrically, limit in electronic equipment use some Hazardous Substances Directive ",
Ask electronic electric equipment product limits and use lead (Pb), hydrargyrum (Hg), cadmium (Cd), Cr VI (Cr6+), many bromines
Biphenyl (PBB) and six kinds of harmful substances of PBDEs (PBDE), Qi Zhongqian, hydrargyrum, Cr VI, PBBs,
The maximum allowable content of PBDEs is 0.1% (1000ppm), and the maximum allowable content of cadmium is
0.01% (100ppm).
But in existing chrome-free tanning agent or with molybdate as main component, or with rare earth metal salt it is
Main component, but these passivator is relatively costly, and passivation effect is the most not satisfactory, can't fully meet
The market demand.Up to now, the art does not also occur that one is the most satisfactory and has relatively soaring market
The chrome-free tanning agent of field prospect.
The most how to overcome the deficiencies in the prior art, it has also become the technical barrier that this area is urgently to be resolved hurrily.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art to provide a kind of hot-dip galvanizing sheet steel chrome-free tanning agent
And preparation method thereof, this chrome-free tanning agent has the advantage that corrosion resistance performance strong, anti-scratch is good, and does not contains
Cr VI, environmentally friendly.
The technical solution used in the present invention is as follows:
Hot-dip galvanizing sheet steel chrome-free tanning agent, the following raw material including according to mass fraction meter: phytic acid 25-40
Part, sodium silicate 8-15 part, sodium citrate 10-18 part, rosin resin 5-16 part, politef concentrate
Dispersion liquid 15-25 part, lignosulfonate 6-14 part, ethanol 18-30 part, water 20-30 part.
Above-described hot-dip galvanizing sheet steel chrome-free tanning agent, the following raw material including according to mass fraction meter:
Phytic acid 32 parts, sodium silicate 11 parts, sodium citrate 14 parts, rosin resin 10 parts, politef concentrate
Dispersion liquid 21 parts, lignosulfonate 9 parts, ethanol 25 parts, 26 parts of water.
Above-described hot-dip galvanizing sheet steel chrome-free tanning agent, it is liquid-solid that wherein said politef concentrates dispersion
Content is 60%.
The preparation method of above-described hot-dip galvanizing sheet steel chrome-free tanning agent, comprises the steps:
(1) first lignosulfonate is added to the water, adds sodium silicate, stir, obtain mixture A；
(2) phytic acid, sodium citrate and rosin resin are sequentially added in ethanol, stir with 90-120r/min
1-2h, obtains mixture B；
(3) mixture A is mixed homogeneously with mixture B, is eventually adding politef and concentrates dispersion liquid,
Stirring 3-6h, obtains described hot-dip galvanizing sheet steel chrome-free tanning agent.
Further, in described step (2), mixing speed is 110r/min.
Beneficial effects of the present invention:
First, inventive formulation is reasonable, and the chrome-free tanning agent corrosion resistance obtained is strong, and has good resisting
Scratch performance；
Second, inventive formulation does not contains Cr VI, meets European Union RoSH instruction, environmentally friendly；
3rd, preparation method of the present invention is easy, low for equipment requirements, is suitable for large-scale production.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but should not be construed as the limit to the present invention
System.In the present invention use raw material unless otherwise noted, all can by city available from.
Embodiment 1
Hot-dip galvanizing sheet steel chrome-free tanning agent, the following raw material including according to mass fraction meter: phytic acid 25 parts,
Sodium silicate 8 parts, sodium citrate 10 parts, rosin resin 5 parts, politef concentration dispersion liquid 15 parts,
Lignosulfonate 6 parts, ethanol 18 parts, 20 parts of water, wherein said politef concentrates and disperses liquid-solid containing
Amount is 58%.
The preparation method of above-described hot-dip galvanizing sheet steel chrome-free tanning agent, comprises the steps:
(1) first lignosulfonate is added to the water, adds sodium silicate, stir, obtain mixture A；
(2) phytic acid, sodium citrate and rosin resin are sequentially added in ethanol, stir 1-2h with 90r/min,
Obtain mixture B；
(3) mixture A is mixed homogeneously with mixture B, is eventually adding politef and concentrates dispersion liquid,
Stirring 3h, obtains described hot-dip galvanizing sheet steel chrome-free tanning agent.
Embodiment 2
Hot-dip galvanizing sheet steel chrome-free tanning agent, the following raw material including according to mass fraction meter: phytic acid 28 parts,
Sodium silicate 9 parts, sodium citrate 12 parts, rosin resin 8 parts, politef concentration dispersion liquid 17 parts,
Lignosulfonate 8 parts, ethanol 23 parts, 24 parts of water, wherein said politef concentrates and disperses liquid-solid containing
Amount is 59%.
The preparation method of above-described hot-dip galvanizing sheet steel chrome-free tanning agent, comprises the steps:
(1) first lignosulfonate is added to the water, adds sodium silicate, stir, obtain mixture A；
(2) phytic acid, sodium citrate and rosin resin are sequentially added in ethanol, stir 1-2h with 100r/min,
Obtain mixture B；
(3) mixture A is mixed homogeneously with mixture B, is eventually adding politef and concentrates dispersion liquid,
Stirring 4h, obtains described hot-dip galvanizing sheet steel chrome-free tanning agent.
Embodiment 3
Hot-dip galvanizing sheet steel chrome-free tanning agent, the following raw material including according to mass fraction meter: phytic acid 32 parts,
Sodium silicate 11 parts, sodium citrate 14 parts, rosin resin 10 parts, politef concentration dispersion liquid 21 parts,
Lignosulfonate 9 parts, ethanol 25 parts, 26 parts of water, wherein said politef concentrates and disperses liquid-solid containing
Amount is 60%.
The preparation method of above-described hot-dip galvanizing sheet steel chrome-free tanning agent, comprises the steps:
(1) first lignosulfonate is added to the water, adds sodium silicate, stir, obtain mixture A；
(2) phytic acid, sodium citrate and rosin resin are sequentially added in ethanol, stir 1-2h with 110r/min,
Obtain mixture B；
(3) mixture A is mixed homogeneously with mixture B, is eventually adding politef and concentrates dispersion liquid,
Stirring 5h, obtains described hot-dip galvanizing sheet steel chrome-free tanning agent.
Embodiment 4
Hot-dip galvanizing sheet steel chrome-free tanning agent, the following raw material including according to mass fraction meter: phytic acid 36 parts,
Sodium silicate 13 parts, sodium citrate 16 parts, rosin resin 12 parts, politef concentration dispersion liquid 23 parts,
Lignosulfonate 11 parts, ethanol 28 parts, 28 parts of water, wherein said politef concentrates and disperses liquid-solid containing
Amount is 61%.
The preparation method of above-described hot-dip galvanizing sheet steel chrome-free tanning agent, comprises the steps:
(1) first lignosulfonate is added to the water, adds sodium silicate, stir, obtain mixture A；
(2) phytic acid, sodium citrate and rosin resin are sequentially added in ethanol, stir 1-2h with 110r/min,
Obtain mixture B；
(3) mixture A is mixed homogeneously with mixture B, is eventually adding politef and concentrates dispersion liquid,
Stirring 6h, obtains described hot-dip galvanizing sheet steel chrome-free tanning agent.
Embodiment 5
Hot-dip galvanizing sheet steel chrome-free tanning agent, the following raw material including according to mass fraction meter: phytic acid 40 parts,
Sodium silicate 15 parts, sodium citrate 18 parts, rosin resin 16 parts, politef concentration dispersion liquid 25 parts,
Lignosulfonate 14 parts, ethanol 30 parts, 30 parts of water, wherein said politef concentrates and disperses liquid-solid containing
Amount is 62%.
The preparation method of above-described hot-dip galvanizing sheet steel chrome-free tanning agent, comprises the steps:
(1) first lignosulfonate is added to the water, adds sodium silicate, stir, obtain mixture A；
(2) phytic acid, sodium citrate and rosin resin are sequentially added in ethanol, stir 1-2h with 120r/min,
Obtain mixture B；
(3) mixture A is mixed homogeneously with mixture B, is eventually adding politef and concentrates dispersion liquid,
Stirring 6h, obtains described hot-dip galvanizing sheet steel chrome-free tanning agent.
Passivating method
Base material carries out washing, pickling, wash, dry after, at ambient temperature, with bar spreader by this
Bright passivator is coated on hot-dip galvanizing sheet steel surface, toasts 30s at 90 DEG C-110 DEG C, and natural cooling 24h is laggard
Row performance test.
Performance test
The embodiment of the present invention 1～5 products obtained therefrom is carried out performance test, and wherein reference examples is chromating agent,
Result such as following table:
Table 1 properties of product test data
Note: the every percent in upper table represents the corroded area percent after test in 72 hours.
Wherein, neutral salt spray test: the hot-dip galvanizing sheet steel test piece after passivation is entered according to GB/T10125-1997
Row neutral salt spray test, loses area in vain and evaluates the corrosion resisting property of passivating film with surface.
X-scribe test: the hot-dip galvanizing sheet steel test piece after passivation is carried out diagonal angle line with blade, scratches passivation
Film, then carry out neutral salt spray test, to detect the corrosion resisting property under the conditions of X-line post-passivation membrane damage.
Resistance to black change is tested: the hot-dip galvanizing sheet steel test piece after being passivated is placed in climatic chamber, 70 DEG C × 80%
Carrying out resistance to black change under relative humidities to test, the test piece of detection passivating film anti-blackening energy is hung on damp heat test
On automatic rotary rack in case, automatic rotary rack was rotated and reverse by identical interval time.
As seen from the above table, products obtained therefrom corrosion resistance of the present invention is strong, and anti-scratch effective, substantially can reach
The effect of chromating agent, wherein embodiment 3 best results.
Claims (5)
1. hot-dip galvanizing sheet steel chrome-free tanning agent, it is characterised in that include according to mass fraction meter is the most former
Material: phytic acid 25-40 part, sodium silicate 8-15 part, sodium citrate 10-18 part, rosin resin 5-16 part,
Politef concentrates dispersion liquid 15-25 part, lignosulfonate 6-14 part, ethanol 18-30 part, water 20-30
Part.
Hot-dip galvanizing sheet steel chrome-free tanning agent the most according to claim 1, it is characterised in that include by
Following raw material according to mass fraction meter: phytic acid 32 parts, sodium silicate 11 parts, sodium citrate 14 parts, rosin tree
10 parts of fat, politef concentrate dispersion liquid 21 parts, lignosulfonate 9 parts, ethanol 25 parts, water 26
Part.
Hot-dip galvanizing sheet steel chrome-free tanning agent the most according to claim 1 and 2, it is characterised in that institute
Stating politef and concentrating dispersion liquid solid content is 60%.
4. the preparation method of the hot-dip galvanizing sheet steel chrome-free tanning agent described in claim 1 or 2, its feature exists
In, comprise the steps:
(1) first lignosulfonate is added to the water, adds sodium silicate, stir, obtain mixture A；
(2) phytic acid, sodium citrate and rosin resin are sequentially added in ethanol, stir with 90-120r/min
1-2h, obtains mixture B；
(3) mixture A is mixed homogeneously with mixture B, is eventually adding politef and concentrates dispersion liquid,
Stirring 3-6h, obtains described hot-dip galvanizing sheet steel chrome-free tanning agent.
The preparation method of hot-dip galvanizing sheet steel chrome-free tanning agent the most according to claim 4, its feature exists
In, in described step (2), mixing speed is 110r/mi n.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610374261.9A CN105839098B (en) | 2016-05-31 | 2016-05-31 | Hot-dip galvanizing sheet steel chrome-free tanning agent and preparation method thereof |
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| CN201610374261.9A CN105839098B (en) | 2016-05-31 | 2016-05-31 | Hot-dip galvanizing sheet steel chrome-free tanning agent and preparation method thereof |
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| CN105839098A true CN105839098A (en) | 2016-08-10 |
| CN105839098B CN105839098B (en) | 2018-09-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243207A (en) * | 2005-08-19 | 2008-08-13 | 日本油漆株式会社 | Surface-conditioning composition and surface conditioning method |
| CN102373453A (en) * | 2010-08-05 | 2012-03-14 | 攀钢集团钢铁钒钛股份有限公司 | Chromium-free passivation solution and hot-dip galvanized metal material |
| CN102747352A (en) * | 2012-07-03 | 2012-10-24 | 中国人民解放军国防科学技术大学 | Passivator and passivation for hot galvanized sheet |
| CN103290401A (en) * | 2013-05-10 | 2013-09-11 | 安徽工业大学 | Chromium-free self-lubricating passivation solution and preparation method thereof |
| CN104404497A (en) * | 2014-12-11 | 2015-03-11 | 天长市飞龙金属制品有限公司 | Passivant for metal coating |
| CN104451626A (en) * | 2014-11-13 | 2015-03-25 | 无锡伊佩克科技有限公司 | Galvanized steel sheet passivating agent and preparation method thereof |
-
2016
- 2016-05-31 CN CN201610374261.9A patent/CN105839098B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243207A (en) * | 2005-08-19 | 2008-08-13 | 日本油漆株式会社 | Surface-conditioning composition and surface conditioning method |
| CN102373453A (en) * | 2010-08-05 | 2012-03-14 | 攀钢集团钢铁钒钛股份有限公司 | Chromium-free passivation solution and hot-dip galvanized metal material |
| CN102747352A (en) * | 2012-07-03 | 2012-10-24 | 中国人民解放军国防科学技术大学 | Passivator and passivation for hot galvanized sheet |
| CN103290401A (en) * | 2013-05-10 | 2013-09-11 | 安徽工业大学 | Chromium-free self-lubricating passivation solution and preparation method thereof |
| CN104451626A (en) * | 2014-11-13 | 2015-03-25 | 无锡伊佩克科技有限公司 | Galvanized steel sheet passivating agent and preparation method thereof |
| CN104404497A (en) * | 2014-12-11 | 2015-03-11 | 天长市飞龙金属制品有限公司 | Passivant for metal coating |
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| CN105839098B (en) | 2018-09-07 |
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