CN109402647A - A kind of corrosion-resistant spiral steel pipe production technology - Google Patents
A kind of corrosion-resistant spiral steel pipe production technology Download PDFInfo
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- CN109402647A CN109402647A CN201811376680.1A CN201811376680A CN109402647A CN 109402647 A CN109402647 A CN 109402647A CN 201811376680 A CN201811376680 A CN 201811376680A CN 109402647 A CN109402647 A CN 109402647A
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/088—Iron or steel solutions containing organic acids
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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
- C23C22/60—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 alkaline aqueous solutions with pH greater than 8
- C23C22/62—Treatment of iron or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
Abstract
The present invention discloses a kind of corrosion-resistant spiral steel pipe production technology, belong to the preparation technical field of steel pipe, its key points of the technical solution are that including cleaning and surface treating agent, the cleaning solution that the cleaning treatment uses includes organic acid and inorganic acid, have according to parts by weight, organic acid include mass percent be 30-50 parts of 10% citric acid, mass percent is 10-20 parts of 5% polyacrylic acid, mass percent is 5-10 parts of 3% hydroxy ethylidene-diphosphate, and inorganic acid is 1-5 parts of hydrofluoric acid that mass percent is 2%.Achieve the effect that the corrosion resistance for improving spiral steel pipe.
Description
Technical field
The present invention relates to the preparation field of steel pipe, in particular to a kind of corrosion-resistant spiral steel pipe production technology.
Background technique
Spiral steel pipe be widely used in the industrial transportation pipe lines such as petroleum, chemical industry, medical treatment, food, light industry, machinery instrument and
Machine structural parts etc..
Spiral steel pipe is to be rolled into low-carbon structural carbon steel or low-alloy structural steel steel band by the angle of certain helix
Then pipe seam is welded and is made by pipe.Steel pipe needs the oxide skin generated when will weld to carry out clear before machine-shaping
It washes, so that steel tube surface after molding is smooth.
It is using hydrofluoric acid and nitric acid solution in most domestic spiral steel pipe factory cleaning process as cleaning solution,
But hydrofluoric acid and nitric acid solution are easy to make spiral steel pipe surface that " negative color " (carburetting) will occur in processing, reduce its anti-crystalline substance
Between corrosive nature, while also destroying the furnace atmosphere of hydrogen shield bright heat treatment furnace, the spiral steel pipe table after making heat treatment
Face cannot get bright requirement.
Summary of the invention
In view of the deficienciess of the prior art, the object of the present invention is to provide a kind of corrosion-resistant spiral steel pipe production technology,
Achieve the effect that the corrosion resistance for improving spiral steel pipe.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of corrosion-resistant spiral steel pipe production technology, including cleaning and surface treating agent, the cleaning solution that the cleaning treatment uses
Including organic acid and inorganic acid, have according to parts by weight, organic acid includes that mass percent is 30-50 parts of 10% citric acid, quality
Percentage is 10-20 parts of 5% polyacrylic acid, and mass percent is 5-10 parts of 3% hydroxy ethylidene-diphosphate, and inorganic acid is quality hundred
Divide than 1-5 parts of hydrofluoric acid for 2%.
By using above-mentioned technical proposal, being used cooperatively for citric acid and hydrofluoric acid can either dissolve the oxidation in steel pipe
Iron, copper oxide etc. eliminate metallic contamination, also play the role of elimination to thick corrosion product, temper film, and polyacrylic acid and hydroxyl are sub-
Ethyl diphosphonic acid can form stable compound with free metal ion, eliminate the iron rust and inorganic salts of steel tube surface, from
And the efficiency of cleaning is improved, and esterification, the ester of generation can occur for hydroxy ethylidene-diphosphate and citric acid or polyacrylic acid
Compound is covered on spiral steel pipe matrix surface, plays the role of further protection to spiral steel pipe matrix, and it is right can to effectively reduce acid
The corrosion of matrix, while hydroxy ethylidene-diphosphate also has certain corrosion inhibition, can effectively reduce acidic materials to steel pipe
Excessive corrosion；Organic acid is small to metal protection simultaneously, can also reach the removal to steel tube surface sundries, and organic acid can be with
Some organic substances of steel tube surface mix, to improve the efficiency of cleaning, improve subsequent welding performance.
The present invention is further arranged to, and the cleaning solution further includes that mass percent is 5-10 parts of 1% surfactant.
By using above-mentioned technical proposal, the setting of surfactant, so that the substance of steel tube surface is activated, accelerate
The dissolution of oxide layer, while also delaying the corrosion to matrix, at the same surfactant mixed with acid solution after can be formed emulsion or
Suspension is able to suppress the volatilization of acid solution, improves the efficiency of cleaning.
The present invention is further arranged to, according to parts by weight, 8 parts of surfactant.
The present invention is further arranged to, and the inorganic acid further includes that mass percent is 3-10 parts of 10% sulfamic acid.
By using above-mentioned technical proposal, sulfamic acid has non-volatile, odorless, reduction cleaning minimum to people's toxicity
When injury to staff's body, sulfamic acid, while can also other than can have good solvability to alkali salt
Keep the surface of matrix brighter and beautiful, can make the surface of entire steel pipe can be relatively flat in subsequent processing in this way
And light, while sulfamic acid also opens good catalytic effect to the esterification of organic acid, the adhesive film of formation is to spiral
Steel pipe matrix plays a certain protective role, and improves the efficiency of cleaning.
The present invention is further arranged to, according to parts by weight, 6 parts of sulfamic acid.
The present invention is further arranged to, and according to parts by weight, the cleaning solution further includes that mass percent is 0.25%Lan-
826 2 parts.
By using above-mentioned technical proposal, Lan-826 have the excellent ability for inhibiting steel pipe to absorb hydrogen in cleaning and
Inhibit Fe3+The ability of accelerated corrosion, smell is smaller, while stability is more lasting, and Lan-826 and citric acid reactions can also
Adhesive film is generated, spiral steel pipe surface brightness is improved.
The present invention is further arranged to, according to parts by weight, 40 parts of the citric acid, 15 parts of polyacrylic acid, hydroxyl Asia second
8 parts of base diphosphonic acid, 3 parts of hydrofluoric acid.
The present invention is further arranged to, according to parts by weight, the surface treating agent that the surface treating agent uses when handling
It than 40-50 parts of the sodium hydroxide for 10%, mass percent is 5-10 parts of 30% hydrogen peroxide, mass percent that liquid, which includes mass fraction,
For 30-40 parts of 5% oxalic acid, 20-30 parts of packing agent, 1-6 parts of corrosion inhibiter.
By using above-mentioned technical proposal, sodium hydroxide and hydrogen peroxide are used cooperatively, the residue after removal cleaning, and
Oxalic acid generates the protective film of ferric oxalate in conjunction with the free iron of matrix surface, prevents the progress of corrosion, plays protection to matrix and makees
With, raising corrosion resistance, while oxalic acid can also further be removed the stain occurred after cleaning or piebald, so that steel
The surface of pipe is more smooth and beautiful；The stickiness of the changeable surface treating agent liquid of the setting of packing agent, so that surface treating agent
Liquid can be good at being attached to matrix surface, and the addition of corrosion inhibiter plays lye certain relaxation effect, prevents caustic corrosion,
The present invention is further arranged to, 45 parts of the sodium hydroxide, 8 parts of hydrogen peroxide, 35 parts of oxalic acid, 25 parts of packing agent, corrosion inhibiter 4
Part, 21 parts of packing agent.
The present invention is further arranged to, and the packing agent is magnesium nitrate, and corrosion inhibiter is sodium molybdate.
In conclusion the invention has the following advantages:
1, citric acid, hydrofluoric acid, hydroxy ethylidene-diphosphate and polyacrylic acid are used cooperatively, by spiral steel pipe dimpling surface
Oxide eliminate, while hydrofluoric acid reacts that offer is further to be ensured to citric acid and oxide, so that the oxidation of package
Object also can with citric acid reactions, and hydroxy ethylidene-diphosphate can with citric acid, polyacrylic acid occur esterification, thus to spiral shell
Rotation steel pipe matrix plays a certain protective role, and prevents acidic materials to spiral steel pipe over cleaning；
2, the sodium hydroxide in surface treating agent liquid, hydrogen peroxide and oxalic acid are used cooperatively, can be by the free of spiral steel pipe surface
Iron oxidation improves the corrosion resistance of spiral steel pipe matrix consequently facilitating oxalic acid reacts the protective film for generating ferric oxalate with iron；
3, the addition of Lan-826 and surfactant may make the oxide on spiral steel pipe surface that can be activated, then quickly go
It removes, so that steel tube surface is smooth, it is bright, while also slowing down corruption of spiral steel pipe during cleaning and surface treating agent to matrix
Erosion, improves the corrosion resistance of spiral steel pipe.
Specific embodiment
Embodiment 1
A kind of corrosion-resistant spiral steel pipe production technology, including cleaning and surface treating agent, the cleaning solution that cleaning treatment uses include
Organic acid, inorganic acid, surfactant have according to parts by weight, organic acid include mass percent be 30 parts of 10% citric acid,
Mass percent is 10 parts of 5% polyacrylic acid, and mass percent is 5 parts of 3% hydroxy ethylidene-diphosphate, and inorganic acid is quality percentage
It is 3 parts of 10% sulfamic acid than 1 part of the hydrofluoric acid for 2%, mass percent, cleaning solution further includes that mass percent is 0.25%
2 parts of Lan-826, mass percent is 5 parts of 1% surfactant, and surfactant uses sodium n-alkylbenzenesulfonate；Table
The surface treating agent liquid that uses of surface treatment agent processing includes that mass fraction is than 40 parts of the sodium hydroxide for 10%, mass percent
30% 5 parts of hydrogen peroxide, mass percent are 30 parts of 5% oxalic acid, 20 parts of packing agent, 1 part of corrosion inhibiter, and packing agent is magnesium nitrate, inhibition
Agent is sodium molybdate.
Embodiment 2
A kind of corrosion-resistant spiral steel pipe production technology, including cleaning and surface treating agent, the cleaning solution that cleaning treatment uses include
Organic acid, inorganic acid, surfactant have according to parts by weight, organic acid include mass percent be 40 parts of 10% citric acid,
Mass percent is 15 parts of 5% polyacrylic acid, and mass percent is 8 parts of 3% hydroxy ethylidene-diphosphate, and inorganic acid is quality percentage
It is 6 parts of 10% sulfamic acid than 3 parts of the hydrofluoric acid for 2%, mass percent, cleaning solution further includes that mass percent is 0.25%
2 parts of Lan-826, mass percent is 8 parts of 1% surfactant, and surfactant uses sodium n-alkylbenzenesulfonate；Table
The surface treating agent liquid that uses of surface treatment agent processing includes that mass fraction is than 45 parts of the sodium hydroxide for 10%, mass percent
30% 8 parts of hydrogen peroxide, mass percent are 35 parts of 5% oxalic acid, 25 parts of packing agent, 4 parts of corrosion inhibiter, and packing agent is magnesium nitrate, inhibition
Agent is sodium molybdate.
Embodiment 3
A kind of corrosion-resistant spiral steel pipe production technology, including cleaning and surface treating agent, the cleaning solution that cleaning treatment uses include
Organic acid, inorganic acid, surfactant have according to parts by weight, organic acid include mass percent be 50 parts of 10% citric acid,
Mass percent is 20 parts of 5% polyacrylic acid, and mass percent is 10 parts of 3% hydroxy ethylidene-diphosphate, and inorganic acid is quality hundred
Dividing than 5 parts of the hydrofluoric acid for 2%, mass percent is 10 parts of 10% sulfamic acid, and cleaning solution further includes that mass percent is 0.25%
2 parts of Lan-826, mass percent is 10 parts of 1% surfactant, and surfactant uses sodium n-alkylbenzenesulfonate；
The surface treating agent liquid that surface treating agent processing uses includes mass fraction than 50 parts of the sodium hydroxide for 10%, mass percent
It is 40 parts of 5% oxalic acid, 30 parts of packing agent, 6 parts of corrosion inhibiter for 10 parts of 30% hydrogen peroxide, mass percent, packing agent is magnesium nitrate, is delayed
Erosion agent is sodium molybdate.
Comparative example 1
With embodiment 2 the difference is that, without Lan-826 in cleaning solution.
Comparative example 2
With embodiment 2 the difference is that, surfactant-free in cleaning solution.
Comparative example 3
With embodiment 2 the difference is that, without Lan-826 and surfactant in cleaning solution.
To embodiment 1-3 and comparative example 1-3 according to HB5292-84 " quality inspection of spiral steel pipe clean the surface inorganic agent ",
According to 2, clean the surface inorganic agent quality requirement；3, regulation of inspection and the method for inspection are as inspection foundation.It extracts with batch of 5
Spiral steel pipe is detected.
Testing result is as shown in table 1, table 2 and table 3.
1 steel pipe appearance testing result of table
| Detection project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Steel pipe 1 | Grey | Silvery white | Grey | Steel gray | It is faint yellow | Light/dark balance |
| Steel pipe 2 | Grey | Silvery white | Grey | Steel gray | It is faint yellow | Light/dark balance |
| Steel pipe 3 | Grey | Silvery white | Grey | Steel gray | It is faint yellow | Light/dark balance |
| Steel pipe 4 | Grey | Silvery white | Grey | Steel gray | It is faint yellow | Light/dark balance |
| Steel pipe 5 | Grey | Silvery white | Grey | Steel gray | It is faint yellow | Light/dark balance |
2 steel pipe corrosion resistance testing result of table
| Detection project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Steel pipe 1 | Spottiness | Without trace | Spottiness | Corrode less | Corrode less | Erosion is more |
| Steel pipe 2 | Spottiness | Without trace | Spottiness | Corrode less | Corrode less | Erosion is few |
| Steel pipe 3 | Spottiness | Without trace | Spottiness | Corrode less | Corrode less | Erosion is few |
| Steel pipe 4 | Spottiness | Without trace | Spottiness | Corrode less | Corrode less | Erosion is few |
| Steel pipe 5 | Spottiness | Without trace | Spottiness | Corrode less | Corrode less | Erosion is few |
3 steel pipe film layer integrity detection result of table
| Detection project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Steel pipe 1 | Spottiness copper | Without deposition copper | Spottiness copper | There is a small amount of copper | There is a small amount of copper | Copper is relatively more |
| Steel pipe 2 | Spottiness copper | Without deposition copper | Spottiness copper | There is a small amount of copper | There is a small amount of copper | Copper is relatively more |
| Steel pipe 3 | Spottiness copper | Without deposition copper | Spottiness copper | There is a small amount of copper | There is a small amount of copper | Copper is relatively more |
| Steel pipe 4 | Spottiness copper | Without deposition copper | Spottiness copper | There is a small amount of copper | There is a small amount of copper | Copper is relatively more |
| Steel pipe 5 | Spottiness copper | Without deposition copper | Spottiness copper | There is a small amount of copper | There is a small amount of copper | Copper is relatively more |
Test result is as follows:
1) according to the testing result of table 1, comparative example 1-3 is various with comparing at spiral steel pipe clean the surface in embodiment 2
Result after managing agent is best, has both effectively removed the various oxides on spiral steel pipe surface, while the surface treating agent film energy generated
It plays a protective role well to spiral steel pipe matrix；Comparative example 1-3's the results show that without Lan-826 or surfactant or
Without Lan-826 and when surfactant, the clean the surface inorganic agent effect of spiral steel pipe is all bad；
2) implement the effect to spiral steel pipe clean the surface inorganic agent in 2 according to the testing result of table 2, in embodiment 1-3 most
It is good, so that the corrosion-free object in spiral steel pipe surface generates, play a protective role to spiral steel pipe matrix；Detection in comparative example 1-3
As a result surface, no Lan-826 and surfactant play an important role in clean the surface inorganic agent, so without Lan-
826 or surfactant or the two all without when, spiral steel pipe is easy to happen corrosion；
3) implement the effect to spiral steel pipe clean the surface inorganic agent in 2 according to the testing result of table 3, in embodiment 1-3 most
It is good, can be by the oxide removal on spiral steel pipe surface, while the surface treating agent film generated plays well spiral steel pipe
Protective effect, Lan-826 can effectively prevent corroding；Result surface in comparative example 1-3, the oxide in spiral steel pipe do not clean
It is complete, while the surface treating agent film generated is easy to be corroded.
To sum up, the optimised quantity when amount of each proportion in embodiment 2 is clean the surface inorganic agent.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of corrosion-resistant spiral steel pipe production technology, including cleaning and surface treating agent, it is characterised in that: the cleaning treatment
The cleaning solution used includes organic acid and inorganic acid, is had according to parts by weight, and organic acid includes that mass percent is 10% citric acid
30-50 parts, mass percent be 10-20 part of 5% polyacrylic acid, mass percent be 5-10 parts of 3% hydroxy ethylidene-diphosphate, nothing
Machine acid is 1-5 parts of hydrofluoric acid that mass percent is 2%.
2. a kind of corrosion-resistant spiral steel pipe production technology according to claim 1, it is characterised in that: the cleaning solution also wraps
Including mass percent is 5-10 parts of 1% surfactant.
3. a kind of corrosion-resistant spiral steel pipe production technology according to claim 2, it is characterised in that: according to parts by weight,
8 parts of surfactant.
4. a kind of corrosion-resistant spiral steel pipe production technology according to claim 1, it is characterised in that: the inorganic acid also wraps
Including mass percent is 3-10 parts of 10% sulfamic acid.
5. a kind of corrosion-resistant spiral steel pipe production technology according to claim 4, it is characterised in that: according to parts by weight,
6 parts of sulfamic acid.
6. a kind of corrosion-resistant spiral steel pipe production technology according to claim 1, it is characterised in that: according to parts by weight,
The cleaning solution further includes that mass percent is 2 parts of 0.25%Lan-826.
7. a kind of corrosion-resistant spiral steel pipe production technology according to claim 1, it is characterised in that: according to parts by weight,
40 parts of the citric acid, 15 parts of polyacrylic acid, 8 parts of hydroxy ethylidene-diphosphate, 3 parts of hydrofluoric acid.
8. a kind of corrosion-resistant spiral steel pipe production technology according to claim 1, it is characterised in that: according to parts by weight,
The surface treating agent liquid used when surface treating agent processing includes mass fraction than 40-50 parts of the sodium hydroxide for 10%, matter
Amount percentage is 5-10 parts of 30% hydrogen peroxide, mass percent is 30-40 parts of 5% oxalic acid, 20-30 parts of packing agent, corrosion inhibiter 1-6
Part.
9. a kind of corrosion-resistant spiral steel pipe production technology according to claim 8, it is characterised in that: the sodium hydroxide 45
Part, 8 parts of hydrogen peroxide, 35 parts of oxalic acid, 25 parts of packing agent, 4 parts of corrosion inhibiter.
10. a kind of corrosion-resistant spiral steel pipe production technology according to claim 8, it is characterised in that: the packing agent is
Magnesium nitrate, corrosion inhibiter are sodium molybdate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716254A (en) * | 2019-03-20 | 2020-09-29 | 天津市同鑫泰钢管制造有限公司 | Crack-resistant rust-removing processing technology for long-distance transportation spiral steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111716254A (en) * | 2019-03-20 | 2020-09-29 | 天津市同鑫泰钢管制造有限公司 | Crack-resistant rust-removing processing technology for long-distance transportation spiral steel pipe |
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