CN110079795A - A kind of galvanized part surface treating agent and preparation method thereof - Google Patents
A kind of galvanized part surface treating agent and preparation method thereof Download PDFInfo
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- CN110079795A CN110079795A CN201910537440.3A CN201910537440A CN110079795A CN 110079795 A CN110079795 A CN 110079795A CN 201910537440 A CN201910537440 A CN 201910537440A CN 110079795 A CN110079795 A CN 110079795A
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- galvanized part
- methylol
- surface treating
- acid
- part surface
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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
- C23C22/34—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 fluorides or complex fluorides
Abstract
The invention discloses a kind of galvanized part surface treating agents, it is made of the following raw material: 15~20g/L of titanyl sulfate, 20~30g/L of sodium metasilicate, 1~5g/L of phytic acid, 30~35g/L of sodium nitrate, 5~10g/L of ammonium acid fluoride, 3~5mL/L of sulfuric acid, 5~10g/L of lanthanum chloride, 10~15mL/L of hydrogen peroxide, N, N, 1 ~ 3g/L of (methylol) ethylenediamine of N', N'- tetra-, surplus are water.The present invention on the basis of existing Chrome-free chromatic passivation formula of liquid by improving, the N of specific dosage is added, N, N', N'- tetra- (methylol) ethylenediamine, and fluoride is replaced with into ammonium acid fluoride, so that the galvanized part appearance by Passivation Treatment keeps the true qualities of zinc coat, the corrosion resistance for improving galvanized part simultaneously substantially increases the market acceptance of galvanized part after passivation, has considerable economic benefit and wide application prospect.
Description
Technical field
The invention belongs to field of metal surface treatment, and in particular to a kind of galvanized part surface treating agent and preparation method thereof.
Background technique
Passivation Treatment refers to carries out chemistry or electrochemical treatments in certain solution, and one layer of solid cause is formed on coating
The surface treatment method of the film close, stability is high, passivation make the corrosion resistance of coating further improve and increase table
Face gloss and resistant to pollution ability.Workpiece surface such as Jing Guo chemical plating, plating, pickling, washing processing is very active, so
It to be passivated processing immediately, making that treated, metal surface forms layer protecting film, slows down corrosion.Workpiece is carried out comprehensive
Passivation Treatment can be improved its corrosion resistance, prolong the service life.
Passivation and technique mainly have two class of chromium passivating and chromium-free deactivation.It wherein studies comparative maturity and application is more early
Be chromating, but due to Cr VI have quite high toxicity and easily it is carcinogenic, with people's environmental protection consciousness
Enhancing is increasingly wished to find the new formula that can replace chromic acid passivation and new process.Currently, the prior art has been disclosed one
The technical solution of a little galvanized part chromium-free passivating treatment agents, such as publication No. are the Chinese patent application of CN105779983A, open
A kind of Chrome-free color passivation solution, component and content are as follows: 15~20g/L of titanyl sulfate, 20~30g/L of sodium metasilicate, phytic acid 1~
5g/L, 30~35g/L of sodium nitrate, 5~10g/L of fluoride, 3~5mL/L of sulfuric acid, 5~10g/L of lanthanum chloride, hydrogen peroxide 10~
15mL/L, remaining is water H2O, and passivating solution pH value is 1~3；The invention passivating solution is without heavy metals harmful substances such as chromium, to environment
And human body is non-hazardous, and passivating solution stability is good, and it is high in the corrosion resistance for the passivating film that Several Thiourea Derivatives on Zinc Plate Surface is formed, it is a kind of completely new
Environmentally friendly passivating solution.But passing through the Chrome-free color passivation solution treated galvanized part appearance is colour, and many applications
It is required that galvanized part surface still keeps the true qualities of zinc coat.Therefore, appearance colour reduces the city of the Chrome-free chromatic passivation liquid product
Field application prospect.Therefore, one kind is developed not change zinc coat appearance and can be further improved the chromium-free deactivation of corrosion resistance
Inorganic agent becomes a kind of urgent need.
Summary of the invention
In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a kind of Chrome-free for not changing zinc coat appearance is blunt
Change surface treating agent, mainly solving the galvanized part appearance Jing Guo Passivation Treatment in the prior art is in colored technical problem, simultaneously
Further increase the corrosion resistance of galvanized part.
For achieving the above object, the invention adopts the following technical scheme:
A kind of galvanized part surface treating agent, is made of the following raw material: 15~20g/L of titanyl sulfate, 20~30g/L of sodium metasilicate, plant
1~5g/L of acid, 30~35g/L of sodium nitrate, 5~10g/L of ammonium acid fluoride, 3~5mL/L of sulfuric acid, 5~10g/L of lanthanum chloride, peroxidating
10~15mL/L of hydrogen, N, N, N ', 1 ~ 3 g/L of N '-four (methylol) ethylenediamine, surplus are water.
The sulfuric acid is the concentrated sulfuric acid that mass fraction is 98%.
The preparation method of galvanized part surface treating agent of the present invention is simple and convenient, by raw material according to titanyl sulfate, silicic acid
Sodium, phytic acid, sodium nitrate, ammonium acid fluoride, sulfuric acid, lanthanum chloride, hydrogen peroxide, N, N, N ', N '-four (methylol) ethylenediamine
It is uniform that sequence sequentially adds stirring and dissolving in water, pay attention to adding every time could be added after a kind of raw material is completely dissolved it is subsequent
Raw material.
The present invention compared with the prior art the utility model has the advantages that the present invention passes through the base in existing Chrome-free chromatic passivation formula of liquid
It is improved on plinth, the N of specific dosage, N, N ', N '-four (methylol) ethylenediamine is added, and fluoride is replaced with into fluorine
Change hydrogen ammonium, so that the galvanized part appearance by Passivation Treatment keeps the true qualities of zinc coat, while improving the corrosion-resistant of galvanized part
Performance substantially increases the market acceptance of galvanized part after passivation, before considerable economic benefit and wide application
Scape.
Specific embodiment
Below by embodiment, the invention will be further described.
Embodiment 1:
A kind of galvanized part surface treating agent, is made of the following raw material: titanyl sulfate 15g/L, sodium metasilicate 20g/L, phytic acid 3g/L, nitre
Sour sodium 30g/L, ammonium acid fluoride 5g/L, mass fraction be 98% concentrated sulfuric acid 3mL/L, lanthanum chloride 5g/L, hydrogen peroxide 10mL/L,
N, N, N ', 2 g/L of N '-four (methylol) ethylenediamine, surplus are water.
The preparation method of the galvanized part surface treating agent: by raw material according to titanyl sulfate, sodium metasilicate, phytic acid, sodium nitrate,
The sequence of ammonium acid fluoride, sulfuric acid, lanthanum chloride, hydrogen peroxide, N, N, N ', N '-four (methylol) ethylenediamine sequentially add water
Middle stirring and dissolving is uniform, and subsequent raw material could be added by paying attention to adding every time after a kind of raw material is completely dissolved.
Embodiment 2:
A kind of galvanized part surface treating agent, is made of the following raw material: titanyl sulfate 20g/L, sodium metasilicate 20g/L, phytic acid 5g/L, nitre
Sour sodium 30g/L, ammonium acid fluoride 10g/L, the concentrated sulfuric acid 3mL/L that mass fraction is 98%, lanthanum chloride 10g/L, hydrogen peroxide 10mL/
L, N, N, N ', 3 g/L of N '-four (methylol) ethylenediamine, surplus are water.
The preparation method is the same as that of Example 1 for the galvanized part surface treating agent.
Embodiment 3:
A kind of galvanized part surface treating agent, is made of the following raw material: titanyl sulfate 15g/L, sodium metasilicate 30g/L, phytic acid 1g/L, nitre
Sour sodium 35g/L, ammonium acid fluoride 5g/L, the concentrated sulfuric acid 5mL/L that mass fraction is 98%, lanthanum chloride 5g/L, hydrogen peroxide 15mL/L, N
, N, N ', 1 g/L of N '-four (methylol) ethylenediamine, surplus are water.
The preparation method is the same as that of Example 1 for the galvanized part surface treating agent.
Comparative example 1:
A kind of galvanized part surface treating agent, is made of the following raw material: titanyl sulfate 15g/L, sodium metasilicate 20g/L, phytic acid 3g/L, nitre
Sour sodium 30g/L, ammonium acid fluoride 5g/L, mass fraction be 98% concentrated sulfuric acid 3mL/L, lanthanum chloride 5g/L, hydrogen peroxide 10mL/L,
Surplus is water.
Comparative example 1 difference from example 1 is that, N, N, N ', N '-four (methylol) second two is not added
Amine, other raw material components and the preparation method is the same as that of Example 1.
Comparative example 2:
A kind of galvanized part surface treating agent, is made of the following raw material: titanyl sulfate 15g/L, sodium metasilicate 20g/L, phytic acid 3g/L, nitre
Sour sodium 30g/L, sodium fluoride 5g/L, the concentrated sulfuric acid 3mL/L that mass fraction is 98%, lanthanum chloride 5g/L, hydrogen peroxide 10mL/L, N
, N, N ', 2 g/L of N '-four (methylol) ethylenediamine, surplus are water.
Comparative example 2 difference from example 1 is that, replace ammonium acid fluoride with sodium fluoride, other raw material components and system
Preparation Method is the same as embodiment 1.
Comparative example 3:
A kind of galvanized part surface treating agent, is made of the following raw material: titanyl sulfate 15g/L, sodium metasilicate 20g/L, phytic acid 3g/L, nitre
Sour sodium 30g/L, ammonium acid fluoride 5g/L, mass fraction be 98% concentrated sulfuric acid 3mL/L, lanthanum chloride 5g/L, hydrogen peroxide 10mL/L,
N, N, N ', 0.2 g/L of N '-four (methylol) ethylenediamine, surplus are water.
Comparative example 3 difference from example 1 is that, N, N, N ', N '-four (methylol) ethylenediamine dosage drop
Down to 0.2 g/L, other raw material components and the preparation method is the same as that of Example 1.
Comparative example 4:
A kind of galvanized part surface treating agent, is made of the following raw material: titanyl sulfate 15g/L, sodium metasilicate 20g/L, phytic acid 3g/L, nitre
Sour sodium 30g/L, ammonium acid fluoride 5g/L, mass fraction be 98% concentrated sulfuric acid 3mL/L, lanthanum chloride 5g/L, hydrogen peroxide 10mL/L,
N, N, N ', (methylol) ethylenediamine of N '-four 5g/L, surplus are water.
Comparative example 4 difference from example 1 is that, the dosage of N, N, N ', N '-four (methylol) ethylenediamine mention
Up to 5 g/L, other raw material components and the preparation method is the same as that of Example 1.
The galvanized part surface treating agent made from the present embodiment 1 ~ 3, comparative example 1 ~ 4 carries out same a collection of hot-dip galvanizing sheet steel blunt
Change processing, specifically: 60s is impregnated at room temperature, it is dry after then washing.
According to GB/T10125-1997 " artificial atmosphere corrosion test salt spray test " to the hot galvanizing after above-mentioned Passivation Treatment
After steel plate carries out salt spray corrosion test 120h, referring to GB/T6461-2002, " metal and other inorganic cover layers are passed through on metallic matrix
The grading of sample and test specimen after corrosion test " grade evaluation is carried out, the results are shown in Table 1:
1 Neutral Salt Spray Corrosion protection class evaluation result of table
| Appearance | White rust area A/% | Protection class | |
| Embodiment 1 | Zinc coat true qualities | Nothing | 10 |
| Embodiment 2 | Zinc coat true qualities | 0~0.1 | 9 |
| Embodiment 3 | Zinc coat true qualities | 0~0.1 | 9 |
| Comparative example 1 | Light blue violet | 5.0~10 | 3 |
| Comparative example 2 | Blue and white | 10~25 | 2 |
| Comparative example 3 | Light blue violet | 2.5~5.0 | 4 |
| Comparative example 4 | Zinc coat true qualities | 10~25 | 2 |
As it can be seen from table 1 the galvanized part that the surface treating agent by the embodiment of the present invention 1 ~ 3 is handled keeps the sheet of zinc coat
Color, while treated galvanized part has excellent salt spray corrosion resistance, wherein embodiment 1 is after salt spray test 120h, table
Face does not still start to get rusty, it is seen then that embodiment 1 is best-of-breed technology scheme of the invention.It is not added in 1 inorganic agent of comparative example
N, N, N ', N '-four (methylol) ethylenediamine, treated, and galvanized part surface is in light blue violet, and in salt spray test
120h rear surface has 5.0% or more area to get rusty；Ammonium acid fluoride is replaced with sodium fluoride in 2 inorganic agent of comparative example, it is zinc-plated that treated
Part surface is in blue and white, and has 10% or more area to get rusty in salt spray test 120h rear surface；N, N in 3 inorganic agent of comparative example
, the dosage of N ', N '-four (methylol) ethylenediamine is reduced to 0.2 g/L, and treated, and galvanized part surface is in light blue violet, and
And there is 2.5% or more area to get rusty in salt spray test 120h rear surface；N, N, N ' in 4 inorganic agent of comparative example, (the hydroxyl first of N '-four
Base) dosage of ethylenediamine improves to 5 g/L, and treated, and galvanized part surface keeps zinc coat true qualities, but in salt spray test
120h rear surface has 10% or more area to get rusty.As it can be seen that when not adding N, N, N ', N '-four (methylol) second two in inorganic agent
Amine or the dosage of addition are too low, do not have the effect for keeping galvanized part true qualities, work as N, N, N ', N '-four (methylol) second two
The dosage of amine addition is excessively high, can seriously affect passivation effect.
The above is merely preferred embodiments of the present invention, practical range not for the purpose of limiting the invention.That is Fan Yiben
Equivalent changes and modifications made by the content of patent application the scope of the patents all should be technology scope of the invention.
Claims (6)
1. a kind of galvanized part surface treating agent, which is characterized in that be made of the following raw material: 15~20g/L of titanyl sulfate, sodium metasilicate
20~30g/L, 1~5g/L of phytic acid, 30~35g/L of sodium nitrate, 5~10g/L of ammonium acid fluoride, 3~5mL/L of sulfuric acid, lanthanum chloride 5~
10g/L, 10~15mL/L of hydrogen peroxide, N, N, N ', 1 ~ 3 g/L of N '-four (methylol) ethylenediamine, surplus are water.
2. a kind of galvanized part surface treating agent according to claim 1, which is characterized in that be made of the following raw material: sulfuric acid
Oxygen titanium 15g/L, sodium metasilicate 20g/L, phytic acid 3g/L, sodium nitrate 30g/L, ammonium acid fluoride 5g/L, sulfuric acid 3mL/L, lanthanum chloride 5g/
L, hydrogen peroxide 10mL/L, N, N, N ', 2 g/L of N '-four (methylol) ethylenediamine, surplus are water.
3. a kind of galvanized part surface treating agent, which is characterized in that be made of the following raw material: titanyl sulfate 20g/L, sodium metasilicate 20g/
L, phytic acid 5g/L, sodium nitrate 30g/L, ammonium acid fluoride 10g/L, sulfuric acid 3mL/L, lanthanum chloride 10g/L, hydrogen peroxide 10mL/L, N,
N, N ', 3 g/L of N '-four (methylol) ethylenediamine, surplus are water.
4. a kind of galvanized part surface treating agent, which is characterized in that be made of the following raw material: titanyl sulfate 15g/L, sodium metasilicate 30g/
L, phytic acid 1g/L, sodium nitrate 35g/L, ammonium acid fluoride 5g/L, sulfuric acid 5mL/L, lanthanum chloride 5g/L, hydrogen peroxide 15mL/L, N, N
, 1 g/L of N ', N '-four (methylol) ethylenediamine, surplus are water.
5. described in any item a kind of galvanized part surface treating agents according to claim 1 ~ 4, which is characterized in that the sulfuric acid is matter
Measure the concentrated sulfuric acid that score is 98%.
6. the preparation method of described in any item galvanized part surface treating agents according to claim 1 ~ 4, which is characterized in that by raw material
According to titanyl sulfate, sodium metasilicate, phytic acid, sodium nitrate, ammonium acid fluoride, sulfuric acid, lanthanum chloride, hydrogen peroxide, N, N, N ', N '-
It is uniform that the sequence of four (methylol) ethylenediamines sequentially adds stirring and dissolving in water.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983317A (en) * | 2019-12-17 | 2020-04-10 | 昆明理工大学 | Electrogalvanizing silicate molybdate composite type colorful passivation solution and preparation method thereof |
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|---|---|---|---|---|
| CN1858302A (en) * | 2006-06-09 | 2006-11-08 | 广东多正化工科技有限公司 | High anti-corrosion zinc coating trivalent chromium lue-white passivating agent and its preparing method |
| CN104087884A (en) * | 2014-07-15 | 2014-10-08 | 无锡伊佩克科技有限公司 | Metal galvanization and passivation method and use of chelating agent |
| CN105779983A (en) * | 2016-04-19 | 2016-07-20 | 昆明理工大学 | Chromium-free iridescent passivation liquid |
| CN109609944A (en) * | 2018-12-30 | 2019-04-12 | 王冬生 | A kind of aluminium alloy true qualities chromium-free passivating treatment agent and preparation method thereof |
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2019
- 2019-06-20 CN CN201910537440.3A patent/CN110079795B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858302A (en) * | 2006-06-09 | 2006-11-08 | 广东多正化工科技有限公司 | High anti-corrosion zinc coating trivalent chromium lue-white passivating agent and its preparing method |
| CN104087884A (en) * | 2014-07-15 | 2014-10-08 | 无锡伊佩克科技有限公司 | Metal galvanization and passivation method and use of chelating agent |
| CN105779983A (en) * | 2016-04-19 | 2016-07-20 | 昆明理工大学 | Chromium-free iridescent passivation liquid |
| CN109609944A (en) * | 2018-12-30 | 2019-04-12 | 王冬生 | A kind of aluminium alloy true qualities chromium-free passivating treatment agent and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983317A (en) * | 2019-12-17 | 2020-04-10 | 昆明理工大学 | Electrogalvanizing silicate molybdate composite type colorful passivation solution and preparation method thereof |
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