CN1024147C - Rust-proof solution for iron and steel materials - Google Patents
Rust-proof solution for iron and steel materials Download PDFInfo
- Publication number
- CN1024147C CN1024147C CN 90106104 CN90106104A CN1024147C CN 1024147 C CN1024147 C CN 1024147C CN 90106104 CN90106104 CN 90106104 CN 90106104 A CN90106104 A CN 90106104A CN 1024147 C CN1024147 C CN 1024147C
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- CN
- China
- Prior art keywords
- solution
- iron
- rust
- steel materials
- passivation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Chemical Treatment Of Metals (AREA)
Abstract
The present invention relates to a rust preventing solution for iron and steel materials, which is particularly to suitable for the high-speed passivating and rust preventing treatment of iron and steel materials under a hot state (from 350 to 700 DEG C). The solution has the components by weight percentages of 0.3% to 0.7% of Fe (OH) to (OH) 3, 0.3% to 0.7% of NaOH, 1% to 4% of NaNO3, 0.3% to 1.5% of Na2SiO3, 0.2% to 1.2% of Na2Cr2O4, and water as the rest. The solution has the advantages of rapid film formation, good adhesiveness of a film layer and a base body layer, low price, no nuisance, etc., and is particularly suitable for the on-line passivation and rust preventing treatment of cold-control reinforced bars.
Description
A kind of rust-proof solution for iron and steel materials is specially adapted to the quick passivation antirust processing of ferrous materials under hot (350～700 ℃).
As everyone knows, the antirusting treating method of current existing multiple ferrous materials, wherein the antirust processing of passivation is exactly a kind of rust-proof effect method preferably.The antirust solution of passivation commonly used at present has potassium bichromate and sodium nitrite solution; these two kinds of solution all can use steel material surface by chemical reaction form can with the protective layer of the isolated densification of air; but these two kinds of solution are promptly decomposing more than 300 ℃, therefore can only use below 200 ℃.For example, the patent No. is the steel derusting passivation novel process of 85104742A, just disclosed a kind of passivating solution based on Sodium Nitrite, it can only (use under 10～40 ℃ the condition, the passive film film formation time is 3～5 minutes, obviously, for the ferrous materials that need carry out the antirust processing of passivation fast at hot down (350～700 ℃), these two kinds of antirust solution of passivation commonly used just can not use, with regard to the reinforcing bar that the back Heat Treatment is produced that rolls that adopts with current popularization, because of be subjected to water cooling in water cooler, surface tissue changes with the reinforcing bar of this explained hereafter:
This non-crystalline state hydrous iron oxide is extremely unstable, and dehydration generates Fe easily
2O
3Iron rust, and reinforcing bar still has the free Fe of existence and FeO also to be easy to generate Fe after going out water cooler
2O
3, Fe
2O
3It is a kind of short texture, the material that flakes easily and peel off, therefore adopt the rebar surface easy-to-rust more that rolls the back Heat Treatment, and bring difficulty for storage in batches and architectural use, and after controlling cold reinforcing bar to go out water cooler its surface temperature still up to 350～700 ℃, therefore obviously can not adopt passivation rust protection liquid commonly used to carry out online antirust processing, and owing to the reinforcing bar on-line velocity is placed restrictions on, so film formation reaction must be in the extremely short time.For example in the several seconds, finish.
Purpose of the present invention to develop exactly a kind of can be applicable to high temperature (350～700 ℃) and with steel material surface reaction film formation time short (in the several seconds), favorable rust preventing effect, inexpensive, three-waste free pollution, and be specially adapted to the antirust solution of passivation of controlled cooling reinforcing bar online treatment.
Measure of the present invention is to remove to select to have the spinel type dot matrix, and fine and close can effectively hinder the Fe of oxygen to the material internal migration
3O
4Outside the film, also selected mobile, adhesivity is better, film-forming properties is easier to, and the Na that do not decompose of reaction at high temperature
4SiCr
2O
7Protective membrane, and interpolation can make Fe
3O
4The catalyzer that film generates fast.
The present invention adopts following component:
1, adopts Fe(OH)
3As catalyzer, impel FeO(OH) can be quickly converted to Fe
3O
4, chemical equation is as follows:
2, employing can generate desirable Na
4SiCr
2O
7(OH) Na of protective membrane
2SiO
3And Na
2Cr
2O
4, its reaction formula is as follows:
This chemical equation carries out under 300～700 ℃, and the high more reaction times of temperature is short more.
3, adopt and to generate Fe with the free Fe of rebar surface
3O
4The NaOH of film and NaNO
3Component, its reaction formula is:
The invention is characterized in that the composition of solution and proportioning are (by weight percentage): Fe(OH)
30.3～0.7%, NaOH0.3～0.7%, NaNO
31～4%, Na
2SiO
30.3～1.5%, Na
2Cr
2O
40.2～1.2%, Yu Shui.
Be applicable to the antirust processing of ferrous materials passivation of 350～700 ℃ of surface temperatures through advance copy solution, and film formation time is extremely short, in general, temperature of reaction is high more, and the time is short more.When steel material surface temperature during at 550～600 ℃, the reaction times only needs 0.22-0.3 second, handles the rear surface and generates good Fe
3O
4And Na
4SiCr
2O
7(OH) film, rete and matrix adhesivity are fabulous.
Because concentration of the present invention is 2～8%, and the solvent of forming do not have three wastes public hazards, so this solution is inexpensive, is specially adapted to the online antirust processing of industrial hot iron and steel material.
Be embodiments of the invention below.
Adopt Fe(OH)
30.5%, Na(OH) 0.5%, NaNO
32%, Na
2SiO
31%, Na
2Cr
2O
41%, H
2O95% preparation cost solution.
Is 22 millimeters with miniaturised nebuliser to diameter, and surface temperature is that 600 ℃ the controlled cooling reinforcing bar that goes out water cooler carries out jet surface, carries out outdoor hanging test then, after 3 months corrosion does not take place.
In addition, the present invention is in ferrous materials under 350～700 ℃ to temperature also under laboratory condition, carries out the antirust processing of passivation, and finding all can good filming, and the reaction times is extremely lacked (at 0.2～0.3 second).Therefore, this solution goes for the ferrous materials that need carry out the antirust processing of passivation fast at hot down (350～700 ℃) fully.
Adopt this solution that controlled cooling reinforcing bar is carried out antirust processing, can get rid of the antirust treatment process of special passivation because of adopting passivating solution commonly used to carry out, and because the concentration of this solution only is 2-8%, therefore need not improve under the prerequisite of too many cost, make the quality of reinforcing bar that raising significantly, this solution three-waste free pollution public hazards arranged.
Claims (2)
1, a kind of rust-proof solution for iron and steel materials is characterized in that: it is (by weight percentage): Fe (OH) that the composition of solution becomes proportioning
30.3-0.7%, NaOH0.3-0.7%, NaNO
31-4%, Na
2SiO
30.3-1.5%, Na
2Cr
2O
40.2-1.2%, Yu Shui.
2, solution as claimed in claim 1 is characterized in that, the composition proportioning of solution is (by weight percentage): Fe(OH)
30.5%, NaOH0.5%, NaNO
32%, Na
2SiO
31%, Na
2Cr
2O
41%, Yu Shui.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106104 CN1024147C (en) | 1990-12-20 | 1990-12-20 | Rust-proof solution for iron and steel materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106104 CN1024147C (en) | 1990-12-20 | 1990-12-20 | Rust-proof solution for iron and steel materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1062559A CN1062559A (en) | 1992-07-08 |
| CN1024147C true CN1024147C (en) | 1994-04-06 |
Family
ID=4879807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106104 Expired - Fee Related CN1024147C (en) | 1990-12-20 | 1990-12-20 | Rust-proof solution for iron and steel materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024147C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851662B (en) * | 2012-09-14 | 2014-06-11 | 江苏博铭威精密机械制造有限公司 | Metal anti-rust treatment liquid and application method thereof |
-
1990
- 1990-12-20 CN CN 90106104 patent/CN1024147C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1062559A (en) | 1992-07-08 |
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| CF01 | Termination of patent right due to non-payment of annual fee |