CN107267975A - A kind of method for improving common iron rustless property - Google Patents
A kind of method for improving common iron rustless property Download PDFInfo
- Publication number
- CN107267975A CN107267975A CN201710355269.5A CN201710355269A CN107267975A CN 107267975 A CN107267975 A CN 107267975A CN 201710355269 A CN201710355269 A CN 201710355269A CN 107267975 A CN107267975 A CN 107267975A
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- China
- Prior art keywords
- steel
- common iron
- rustless property
- temperature
- improved
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Classifications
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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
- C23C22/78—Pretreatment of the material to be coated
Abstract
The invention provides a kind of method for improving common iron rustless property, 2~5% potassium hydroxide and 13~16% ammonium sulfide, the mixed liquor of 1~2% triethanolamine are applied to the outer surface of steel, then steel are placed in into illumination under sunlight to fetch after 1~2 hour, are positioned over shady place；10~12% nitric acid and the mixed liquor of 0.1~0.2% thiocarbamide are used again, and temperature is 40~60 DEG C, and steel are washed；In the baking oven that 40~60 DEG C are put into after washing, dried；Then by above-mentioned steel successively immersion ammonium chloride, liquor zinci chloridi, finally it is put into passivating solution and is passivated.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of method of raising common iron rustless property.
Background technology
Steel are nation-building and essential valuable cargo of realizing the four modernizations, and it is widely used, various in style, according to disconnected
The difference of face shape, steel are generally divided into section bar, sheet material, tubing and the major class of metallic article four, for the ease of organizing the life of steel
Production, order are supplied and do management and administration well, and heavy rail, light rail, heavy section steel, medium shape, light section, steel are divided into again
Cold-rolled forming section, high-quality shaped steel, wire rod, medium plate, sheet metal, electrician with silicon steel sheet, strip, seamless steel pipe steel, welding steel
The kinds such as pipe, metallic article.
Steel are widely used, various in style, according to the difference of section configuration, steel be generally divided into section bar, sheet material, tubing and
The major class of metallic article four.Steel are the materials of definite shape, size and performance that steel ingot, steel billet or steel are made up of pressure processing
Material.Most of steel processing is all, by pressure processing, processed steel (base, ingot etc.) is produced plastic deformation.According to steel
Processing temperature is different, can be divided into two kinds of cold working and hot-working.
The corrosion of steel is actually a kinds of oxidation reaction, after steel is aoxidized, the oxygen russet that steel surface is just formed
Change iron.Unfortunately：Common steel surface is after the iron oxide of formation, and corrosion does not stop, still may proceed to oxidation, makes rust
Erosion constantly expands, and ultimately causes the damage of object.And under seawater or humidity, high-heat environment weather, the corrosion meeting of ordinary carbon steel
Accelerate, ultimately form hole.Can be with although carrying out plating using paint or the metal (for example, zinc, nickel and chromium) of resistance to oxidation
Steel surface is protected, still, this protection is only a kind of protection of external film, it is impossible to maintain for a long time, if protective layer
Destroyed, steel below start corrosion again.
Certainly stainless steel and two phase stainless steel anti-corrosion are used, object can maintain not corrosion for a long time.But using not
Rust steel anti-corrosion, its cost is surprising.If can there is a kind of method to improve the rustless property and not of common iron
To be great application prospect if improving cost.
The content of the invention
Goal of the invention：For weak point of the prior art, common iron is improved it is an object of the invention to provide one kind
The method of rustless property.
Technical scheme：The method of the present invention for improving common iron rustless property, is comprised the following steps that：
2~5% potassium hydroxide and 13~16% ammonium sulfide, the mixed liquor of 1~2% triethanolamine are applied to steel
Then steel are placed in illumination under sunlight and are fetched after 1~2 hour, be positioned over shady place by the outer surface of material；10~12% are used again
Nitric acid and 0.1~0.2% thiocarbamide mixed liquor, temperature be 40~60 DEG C, steel are washed；40~60 are put into after washing
DEG C baking oven in, dried；Then by above-mentioned steel successively immersion ammonium chloride, liquor zinci chloridi, finally it is put into blunt
Change and be passivated in liquid.
The step for being washed for steel, can cause subsequently to immerse liquor zinci chloridi progress if condition control is bad
Dipping has adverse effect on, and adhesive force is bad, the use nitric acid and thiourea combination of mixed liquor, and controls temperature preferably 45
℃。
Described ammonium chloride solution concentration is 100~150g/L, and the time impregnated wherein is 2~4 minutes.Described chlorine
It is 150~180g/L to change zinc solution concentration, and the time impregnated wherein is 20~30 minutes.
The temperature of described ammonium chloride solution is 250~300 DEG C.The temperature of described liquor zinci chloridi is 450~470
℃。
Before liquor zinci chloridi is entered, in carrying out ammonium chloride solution at 250~300 DEG C, the step for it is particularly important, this
Sample, can keep certain activity to avoid secondary oxidation, be combined with strengthening coating with matrix.
In passivating process, described passivating solution is that ammonium dichromate and the concentration that concentration is 80~100g/L are 3~4g/L's
The mixed solution of chromic acid.The process can improve steel surface weather-resistant performance, reduce or extension white rust time of occurrence, protect
Holding coating has good outward appearance.
Beneficial effect：Steel surface is handled using method of the present invention, can cause the surface evenness of steel it is high,
Surface roughness is low.Importantly, significantly enhancing the rustless property of steel surface.And it can keep for a long time outside steel
The good outward appearance in surface.
Embodiment：
Embodiment 1
2% potassium hydroxide and 13~16% ammonium sulfide, the mixed liquor of 1% triethanolamine are applied to the outer of steel
Then steel are placed in illumination under sunlight and are fetched after 1 hour, be positioned over shady place by surface；Again use 10% nitric acid and 0.1%
The mixed liquor of thiocarbamide, temperature is 40 DEG C, and steel are washed；In the baking oven that 40 DEG C are put into after washing, dried；Then will
Above-mentioned steel are 2 minutes in 100~150g/L ammonium chloride solution in immersing concentration at 250 DEG C, then steel are entered at 450 DEG C
Enter in the liquor zinci chloridi that concentration is 150g/L 20 minutes, be finally put into temperature to be passivated in 30 DEG C of passivating solutions.It is blunt
Change the mixed solution that liquid is the ammonium dichromate that concentration is 80g/L and the chromic acid that concentration is 3g/L.
Embodiment 2
5% potassium hydroxide and 16% ammonium sulfide, the mixed liquor of 2% triethanolamine are applied to the appearance of steel
Then steel are placed in illumination under sunlight and are fetched after 2 hours, be positioned over shady place by face；Again use 12% nitric acid and 0.2% sulphur
The mixed liquor of urea, temperature is 60 DEG C, and steel are washed；In the baking oven that 60 DEG C are put into after washing, dried；Then will be upper
State steel at 300 DEG C immerse concentration for 150g/L ammonium chloride solution in 4 minutes, then by steel at 470 DEG C enter concentration
For 30 minutes in 180g/L liquor zinci chloridi, finally it is put into temperature to be passivated in 32 DEG C of passivating solutions.Passivating solution is
The mixed solution for the chromic acid that the ammonium dichromate that concentration is 100g/L is 4g/L with concentration.
Embodiment 3
2% potassium hydroxide and 13% ammonium sulfide, the mixed liquor of 1% triethanolamine are applied to the appearance of steel
Then steel are placed in illumination under sunlight and are fetched after 2 hours, be positioned over shady place by face；Again use 10% nitric acid and 0.1% sulphur
The mixed liquor of urea, temperature is 60 DEG C, and steel are washed；In the baking oven that 60 DEG C are put into after washing, dried；Then will be upper
State steel at 300 DEG C immerse concentration for 100g/L ammonium chloride solution in 4 minutes, then by steel at 470 DEG C enter concentration
For 30 minutes in 150g/L liquor zinci chloridi, finally it is put into temperature to be passivated in 32 DEG C of passivating solutions.Passivating solution is
The mixed solution for the chromic acid that the ammonium dichromate that concentration is 80g/L is 3g/L with concentration.
Embodiment 4
5% potassium hydroxide and 16% ammonium sulfide, the mixed liquor of 2% triethanolamine are applied to the appearance of steel
Then steel are placed in illumination under sunlight and are fetched after 1 hour, be positioned over shady place by face；Again use 12% nitric acid and 0.2% sulphur
The mixed liquor of urea, temperature is 40 DEG C, and steel are washed；In the baking oven that 40 DEG C are put into after washing, dried；Then will be upper
State steel at 250 DEG C immerse concentration for 150g/L ammonium chloride solution in 2 minutes, then by steel at 470 DEG C enter concentration
For 20 minutes in 180g/L liquor zinci chloridi, finally it is put into temperature to be passivated in 32 DEG C of passivating solutions.Passivating solution is
The mixed solution for the chromic acid that the ammonium dichromate that concentration is 100g/L is 4g/L with concentration.
Embodiment 5
2% potassium hydroxide and 13% ammonium sulfide, the mixed liquor of 1% triethanolamine are applied to the appearance of steel
Then steel are placed in illumination under sunlight and are fetched after 2 hours, be positioned over shady place by face；Again use 10% nitric acid and 0.1% sulphur
The mixed liquor of urea, temperature is 60 DEG C, and steel are washed；In the baking oven that 60 DEG C are put into after washing, dried；Then will be upper
State steel at 250 DEG C immerse concentration for 150g/L ammonium chloride solution in 2 minutes, then by steel at 470 DEG C enter concentration
For 20 minutes in 180g/L liquor zinci chloridi, finally it is put into temperature to be passivated in 32 DEG C of passivating solutions.Passivating solution is
The mixed solution for the chromic acid that the ammonium dichromate that concentration is 100g/L is 4g/L with concentration.
Embodiment 6
5% potassium hydroxide and 16% ammonium sulfide, the mixed liquor of 2% triethanolamine are applied to the appearance of steel
Then steel are placed in illumination under sunlight and are fetched after 1 hour, be positioned over shady place by face；Again use 12% nitric acid and 0.2% sulphur
The mixed liquor of urea, temperature is 40 DEG C, and steel are washed；In the baking oven that 40 DEG C are put into after washing, dried；Then will be upper
State steel at 300 DEG C immerse concentration for 100g/L ammonium chloride solution in 4 minutes, then by steel at 470 DEG C enter concentration
For 30 minutes in 150g/L liquor zinci chloridi, finally it is put into temperature to be passivated in 32 DEG C of passivating solutions.Passivating solution is
The mixed solution for the chromic acid that the ammonium dichromate that concentration is 80g/L is 3g/L with concentration.
By the products obtained therefrom of above-described embodiment 1~6, spray testing is carried out, solution is 5% sodium chloride solution, and pH value is 6~7,
Temperature is 35 DEG C, and spray amount is 1.4ml/80cm2/ h, sprays one day, after then standing seven days under normal temperature and pressure environment, observation
The outer surface of steel.As a result it is as shown in the table：
| Common iron | After being handled using this method | |
| Embodiment 1 | There is rust staining | Without rust staining |
| Embodiment 2 | There is rust staining | Without rust staining |
| Embodiment 3 | There is rust staining | Without rust staining |
| Embodiment 4 | There is rust staining | Without rust staining |
| Embodiment 5 | There is rust staining | Without rust staining |
| Embodiment 6 | There is rust staining | Without rust staining |
Claims (9)
1. a kind of method for improving common iron rustless property, it is characterised in that carry out according to the following steps：
Step 1) 2~5% potassium hydroxide is applied to 13~16% ammonium sulfide, the mixed liquor of 1~2% triethanolamine
Then steel are placed in illumination under sunlight and are fetched after 1~2 hour, be positioned over shady place by the outer surface of steel；
Step 2) 10~12% nitric acid and the mixed liquor of 0.1~0.2% thiocarbamide are used again, temperature is 40~60 DEG C, to steel
Washed；In the baking oven that 40~60 DEG C are put into after washing, dried；
Step 3) and then by above-mentioned steel successively immersion ammonium chloride, liquor zinci chloridi；
Step 4) finally steel are inserted in passivating solution be passivated.
2. the method for common iron rustless property is improved as claimed in claim 1, it is characterised in that described step 2) in
Mixeding liquid temperature is 45 DEG C.
3. the method for common iron rustless property is improved as claimed in claim 1, it is characterised in that described ammonium chloride solution
Concentration is 100~150g/L, and the time impregnated wherein is 2~4 minutes.
4. the method for common iron rustless property is improved as claimed in claim 1, it is characterised in that described liquor zinci chloridi
Concentration is 150~180g/L, and the time impregnated wherein is 20~30 minutes.
5. the method for common iron rustless property is improved as claimed in claim 1, it is characterised in that described ammonium chloride solution
Temperature be 250~300 DEG C.
6. the method for common iron rustless property is improved as claimed in claim 1, it is characterised in that described liquor zinci chloridi
Temperature be 450~470 DEG C.
7. the method for common iron rustless property is improved as claimed in claim 6, it is characterised in that described liquor zinci chloridi
Temperature be 465 DEG C.
8. the method for common iron rustless property is improved as claimed in claim 1, it is characterised in that described passivating solution is dense
The mixed solution for the chromic acid that the ammonium dichromate that degree is 80~100g/L is 3~4g/L with concentration.
9. the method for common iron rustless property is improved as claimed in claim 1, it is characterised in that the temperature of described passivating solution
Spend for 30~32 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710355269.5A CN107267975A (en) | 2017-05-19 | 2017-05-19 | A kind of method for improving common iron rustless property |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710355269.5A CN107267975A (en) | 2017-05-19 | 2017-05-19 | A kind of method for improving common iron rustless property |
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| Publication Number | Publication Date |
|---|---|
| CN107267975A true CN107267975A (en) | 2017-10-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710355269.5A Pending CN107267975A (en) | 2017-05-19 | 2017-05-19 | A kind of method for improving common iron rustless property |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023443A (en) * | 2018-08-13 | 2018-12-18 | 林州凤宝管业有限公司 | A kind of zinc-plated anti-corrosion treatment process of steel surface |
| CN110359269A (en) * | 2019-08-07 | 2019-10-22 | 李小虎 | A method of improving umbrella cloth ultraviolet resistance |
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| CN101343739A (en) * | 2008-09-01 | 2009-01-14 | 铁道部运输局 | Acid washing passivation technology for stainless steel |
| CN101787525A (en) * | 2009-12-24 | 2010-07-28 | 四川省广汉华威铝业有限公司 | Stainless steel passivation process |
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2017
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| CN101343739A (en) * | 2008-09-01 | 2009-01-14 | 铁道部运输局 | Acid washing passivation technology for stainless steel |
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| CN102220591A (en) * | 2011-07-26 | 2011-10-19 | 扬州华宇管件有限公司 | Pickling and passivating treatment process for stainless steel pipes |
| RU2013141387A (en) * | 2013-09-09 | 2015-03-20 | Закрытое акционерное общество "Барнаульский патронный завод" | METHOD FOR APPLYING PHOSPHATE-POLYMER COATING TO THE SURFACE OF THE CARTRIDGE HOUSING |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023443A (en) * | 2018-08-13 | 2018-12-18 | 林州凤宝管业有限公司 | A kind of zinc-plated anti-corrosion treatment process of steel surface |
| CN110359269A (en) * | 2019-08-07 | 2019-10-22 | 李小虎 | A method of improving umbrella cloth ultraviolet resistance |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171020 |
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| RJ01 | Rejection of invention patent application after publication |