CN106222714B - A kind of processing technology of metal tube - Google Patents
A kind of processing technology of metal tube Download PDFInfo
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- CN106222714B CN106222714B CN201610720619.9A CN201610720619A CN106222714B CN 106222714 B CN106222714 B CN 106222714B CN 201610720619 A CN201610720619 A CN 201610720619A CN 106222714 B CN106222714 B CN 106222714B
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/04—Tubes; Rings; Hollow bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
Abstract
The present invention relates to a kind of processing technologys of metal tube, belong to Alloy Processing field.It solves the problems, such as that inner wall of metal tube can not be electroplated in the prior art and is also easy to produce corrosion.The processing technology includes：By steel alloy machine-shaping, metal tube blank is obtained；Metal tube blank is handled into 50 120min in 20 30 DEG C of electroplate liquid；Metal tube blank after plating is subjected to out light processing, Passivation Treatment, antirust treatment successively, obtains metal tube semi-finished product；The temperature of wherein antirust treatment is 35 45 DEG C, pH value is 11 11.8, and the time is 20 120s；Metal tube semi-finished product are obtained into metal tube finished product through Seal treatment.The present invention increases substantially the corrosion resistance and mechanical property of metal tube, also improves the corrosion resistance in pipe, and does not influence other techniques, nor affects on other performances of product.
Description
Technical field
The present invention relates to a kind of processing technologys of metal tube, belong to Alloy Processing field.
Background technology
Steel is applied to the various aspects in industrial production and life, has in the live and work of the mankind particularly significant
Effect, be the basis of development in science and technology, but steel easy-to-rust and tarnishing processes are considerably complicated in an atmosphere, to industrial production and people
Life generate different degrees of adverse effect, bring unnecessary economic loss.In China, according to Chinese industrial and natural ring
Border Investigation On Corrosion project team investigation result in 2008 shows that direct economic loss passes through indirectly up to 230,000,000,000 yuan as caused by corroding
Ji loss is 5000~600,000,000,000 yuan, is equivalent to the 5% of current year China's gross national product.Therefore, research prevents steel corrosion
Method just become critically important.
Although the corrosion resistance of metalwork is improved frequently by plating in the prior art, when plating metal pipe,
Inside pipe wall is easy to generate corrosion, influences cleannes in product pipe because can not be electroplated, and some antirust agent can influence to process
The performance of middle plating, and influence metal tube following process.
Invention content
The object of the present invention is to provide a kind of processing technology of the metal tube of method simplicity, which makes in metal tube
Outer rust-proof effect is all preferable, while metal tube mechanical performance is high.
Object of the invention can be realized by the following technical scheme：A kind of processing technology of metal tube, the processing
Technique includes the following steps：
By steel alloy machine-shaping, metal tube blank is obtained；
Metal tube blank is handled into 50-120min in 20-30 DEG C of electroplate liquid；
Metal tube blank after plating is subjected to out light processing, Passivation Treatment, antirust treatment successively, obtain metal tube half at
Product；The temperature of wherein antirust treatment is 35-45 DEG C, pH value 11-11.8, time 20-120s；
Metal tube semi-finished product are obtained into metal tube finished product through Seal treatment.
In the processing technology of above-mentioned metal tube, the component and its mass percent of the steel alloy are：C：
0.12-0.18%, Cr：1.3-1.5%, Si：0.15-0.25%, Mn：0.8-1.15%, Al：0.03-0.05%, N：0.008-
0.015%, Ti：0.12-0.22%, P≤0.015%, S≤0.018%, surplus are Fe and inevitable impurity.
Carbon content is reduced in the steel alloy of metal tube of the present invention, improves chromium content, passes through what is generated between each element
Synergistic effect improves the comprehensive performance of metal tube.If carbon content is too low in the steel alloy of metal tube of the present invention, work in-process
Heat treatment can seriously affect intensity and hardness, if the plating under carbon content is excessively high and unsuitable subsequent alkaline condition.In this hair
Suitable Si is added in bright steel alloy can improve the intensity of alloy, if Si contents are less than 0.15%, can influence bending for metal tube
Take intensity.It,, can if manganese content is more than 1.15% in metal tube steel alloy of the present invention although Mn is solution strengthening element
The plasticity and toughness of metal tube is greatly lowered.Chromium can generate synergistic effect with carbon, form a variety of carbide, with
The quantity of the increase of chromium content, carbide is also constantly increasing.The chromium of high-content is added in metal tube, not only
Carbide dispersion distributional pattern in metal tube can be changed, obtained with Cr23C6And Cr7C3Based on carbide, make its Dispersed precipitate in
On Ovshinsky matrix, moreover it is possible to improve the wearability, hardness, intensity of metal tube.And the addition of chromium can improve the through hardening of steel
The antioxygenic property of property and steel.The chromium of high-content can make steel have good height in metal tube steel alloy of the present invention
The anti-oxidant effect with oxidative resistance dielectric corrosion of temperature.These all general low chromium content alloys cannot achieve.But when chromium member
When the content of element is more than 1.5%, the toughness of metal tube and plasticity can be caused to reduce.Steel can be improved in the steel alloy of metal tube in Ti
Strength and toughness, especially can together with aluminium fixed nitrogen, eliminate in steel and endangered caused by extra nitrogen.Aluminium is most base
Originally, most effective crystal grain thinning element mainly exists in the form of AlN in steel.AlN is distributed mainly on crystal boundary, plays pinning crystalline substance
Boundary prevents the effect that crystal grain is grown up.When aluminium content is higher in steel alloy, but nitrogen content is relatively low, then enough AlN cannot be formed
It is set uniformly to be distributed in austenite grain boundary.It is bright that AlN negligible amounts necessarily cause it to be distributed more position pinning crystal boundary effect
Aobvious, less position is then unable to pinning crystal boundary and prevents growing up for austenite grain, this is also to generate mixed crystal, i.e. crystal grain local anomaly
The main reason for growing up.After continuous tests, it was found that, when aluminium content is 0.03-0.05% in metal tube steel alloy of the present invention, control
Al/N >=3 processed can ensure that mixed crystal phenomenon does not occur in the heat treatment of product routine.
In the processing technology of above-mentioned metal tube, the ingredient of electroplate liquid is：Zinc oxide 5-7g/L, sodium hydroxide：110-
130g/L, nickel sulfate：18-22g/L, additive：150-300ml.
Why zinc-nickel alloy coating has excellent corrosion resistance to be because the stable potential of alloy layer is between zinc and matrix
Between (steel), smaller potential difference causes corrosion of coating slower.The corrosion product of zinc-nickel alloy is mainly ZnCl2·4Zn
(oH)2.The corrosion product is uniform, is densely covered in coating surface, and easy conductive, does not there is good protective effect；And zinc coating
Corrosion product be mainly ZnO, short texture does not have protective effect.In addition, in electroplating zinc-nickel alloy layer of the present invention, zinc-
Nickel alloy belongs to y phases (intermetallic compound), has highest thermodynamic stability, thus corrosion resistance is preferable；And zinc coating is
Phase structure (close hexagonal crystal system) is kowtowed, thermodynamic stability is poor.The present invention passes through above-mentioned plating in metal tube blank surface
Technique electroplating zinc-nickel alloy layer has the advantages that following several：1, coating deposition rate is fast；2, the covering power of plating solution is high；3, electric
It flows efficient；4, plating solution current density range is wide, and nickel eutectoid rate is stablized, and dispersibility and covering power are excellent, corrodes to equipment
Property is small；5, the zinc in zinc-nickel alloy coating, nickel content directly affect the corrosion resistance (deterioration rate) of pressure metal tube, and coating
Middle zinc, nickel content influenced by plating solution composition, the mass fraction of nickel can be controlled strictly in coating of the present invention, the ingredient in solution
Convenient for stability contorting, passivating film is not easy to change, and wastewater treatment is simple；6, electroplate liquid of the present invention is stablized, and can keep being used for a long time,
Substantially increase the utilization rate of plating raw material.
Wherein, the additive described in electroplate liquid is common common additive, can be rare earth addition, poly- alkyl Asia
Amine additive.
In the processing technology of above-mentioned metal tube, the ingredient of passivating solution is in Passivation Treatment：Cerous nitrate：1.5-2.5g/L
Urotropinum2O2:5-8ml/L, H3BO3Buffer：0.5-3g/L, pH most 1.5-3.2.
It is similar to electrogalvanizing, to improve the corrosion resistance of zn-ni alloy deposits, increase its dicoration, improves coating and matrix gold
Binding force between category, electroplated zinc nickel alloy also need to be passivated processing after plating, keep one layer of its Surface Creation steady
Qualitative high, dense structure passivating film.Different from general chromating, the present invention is auxiliary using cerous nitrate solution as passivating solution
With hydrogen peroxide oxidant, to metal tube immersion treatment, to achieve the purpose that inhibition.
During Passivation Treatment of the present invention, too low cerium salt concentration or too low pH value can all lead to the general rust of metal tube,
So that its film-formation result can be influenced, the corrosion resistance of conversion film is reduced.Passivation effect is not the increase with nitric acid cerium concentration yet
And increase always, reason is that the concentration of cerous nitrate is higher, and the thicknesses of layers of formation is bigger, and the internal stress of passivating film is also got over
Greatly, internal stress is excessive, passivating film can be caused to crack, to reduce the corrosion resistance of passivating film.When pH value is too low, cathode master
Evolving hydrogen reaction occurs, is unfavorable for the deposition of cerium, while a large amount of stomata is there is also in passivation film surface, so as to cause passivation
The corrosion resistance of film reduces.If pH value is excessively high, and is unfavorable in solution cerium in the deposition of substrate surface.It is found through experiment that
When pH1.5-3.2, processing is passivated to metal tube of the present invention using passivating solution as above, metal tube has preferable copper sulphate
Drop performance, resistance to Neutral Salt Spray Corrosion performance, larger AC impedance, passivation effect are fabulous.
In the processing technology of above-mentioned metal tube, before going out light processing after plating, wrapped before antirust treatment after Passivation Treatment
Include washing.
In the processing technology of above-mentioned metal tube, the ingredient of antirust agent is sodium metasilicate 200-220g/ in the antirust treatment
L, triethanolamine 1.2-1.5g/L, boric acid 1.5-1.8g/L, ethylenediamine tetra-acetic acid 0.15-0.18g/L, sodium citrate 0.5-
0.6g/L, cellulose acetate 0.5-1.0g/L.
The rust preventing used at present to steel alloy is mainly aqua type antirust agent, but contains nitrous in aqua type antirust agent
Hydrochlorate, although traditional nitrous acid salt form antirust agent rust-proof effect is good toxic to environment and human body.And in the present invention
Antirust agent is the water soluble anti-rust agent without nitrite, passes through sodium metasilicate, triethanolamine, the boron in rational proportion antirust agent
Acid, ethylenediamine tetra-acetic acid, sodium citrate, cellulose acetate, these ingredient toxic side effects are minimum, environmental protection and favorable rust preventing effect, energy
Layer protecting film is formed on the inner wall of metal tube surface not being electroplated, delays the time corroded again, and then improve metal
The service life of pipe.
Preferably, the temperature of antirust treatment is 38-42 DEG C, pH value 11.2-11.6, time 40-80s.
In the processing technology of above-mentioned metal tube, Seal treatment is that metal tube semi-finished product are submerged initially in silane reagent to carry out
Silanization treatment handles 50-150s in confining liquid again after taking out drying, and the wherein ingredient of confining liquid is 7-11g/L's
Na2MoO4.H2The temperature of O, 10-15g/L phosphate, 10-30g/L phosphoric acid, pH 4.2-4.6, Seal treatment is 55-62 DEG C.
Silanization treatment is first carried out before molybdate solution Seal treatment in metal tube processing of the present invention, further improves it
Corrosion resistance.After molybdate solution Seal treatment, the more continuous whole densification of metal tube surface film layer.Molybdate is preferably
It is filled with the pin hole and micro-crack of silane film, plays the role of good physical barriers to matrix, reduces what matrix was corroded
Possibility.With the extension of molybdate off-period, corroded area first reduces, and corrosion resistance improves.But when closed between be more than
After 120s, corroded area increases, and corrosion resistance is gradually reduced.Its reason is that the plating zinc-nickel metal tube of silanization is immersed in molybdic acid
The hole of silane film is first filled with after in salting liquid, anti-corrosion capability improves；With the increase of close process time, molybdate turns
The thickness for changing film is continuously increased, and anti-corrosion capability continues growing, and reaches optimum state when to Seal treatment 100s；Thereafter with closing
Processing time continues growing more than 150s, and cracking phenomena can occur for conversion film, and be increasingly becoming corrosion proof Dominated Factors, lead
Cause metal tube surface film layer etch resistant properties globality that downward trend is presented.
Preferably, temperature when silanization treatment is 32-38 DEG C, pH 3.5-4.5, time 80-100s.
Preferably, methanol solution and deionized water that the silane reagent passes through 7% vinyltrimethoxysilane
It is 4-8 by volume:92-96 is mixed hydrolysis 1-2h and is made.
The silane reagent synthesis used in the present invention is simple, this is pollution-free, and silanization treatment process is simple, the silane reagent
Molecule contain X3Si (CH2) nY structures (wherein, X represents hydrolyzable groups, and Y represents organo-functional group).Organo-functional group silicon
Alkane hydrolyzable is silanol Si-OH, and silanol hydroxyl forms hydrogen bond in metal base surface, and further dehydration forms Si-O-M, and (M is gold
Belong to matrix), with Covalent bonding together, while silanol is intermolecular is mutually condensed into Si-O-Si chains, and final polymerization forms thicker three-dimensional
Network structure film layer, is covered in metal base surface, to increase substantially the corrosion resistance of metal tube matrix.
Compared with prior art, the invention has the advantages that：
1, the components compatibility of metal tube of the present invention is reasonable, is made by the collaboration generated between its component and its element
With improving the performances such as the hardness, intensity, corrosion resistance of metal tube.
2, metal tube of the present invention is first passivated in its electroplating surface zinc-nickel alloy, then by passivating solution of cerous nitrate solution,
Then antirust treatment, the most envelope afterwards through progress silanization treatment are carried out to the inner wall of metal tube not being electroplated onto with water soluble anti-rust agent
Processing is closed, the corrosion resistance and mechanical performance of metal tube are further increased.
Specific implementation mode
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1：The processing technology of metal tube
By steel alloy machine-shaping, metal tube blank is obtained；The component and its quality percentage of the steel alloy
Than for：C：0.15%, Cr：1.4%, Si：0.18%, Mn：0.95%, Al：0.04%, N：0.012%, Ti：0.15%, P≤
0.015%, S≤0.018%, surplus are Fe and inevitable impurity.
Metal tube blank is handled into 80min in 25 DEG C of electroplate liquid；The ingredient of electroplate liquid is：Zinc oxide 6g/L, hydrogen-oxygen
Change sodium：120g/L, nickel：0.8g/L, additive：220ml.
Metal tube blank after plating is washed successively, goes out light processing, Passivation Treatment, washing, antirust treatment, is obtained golden
Belong to pipe semi-finished product；Wherein, go out light processing be it is common it is common go out light technology, the ingredient of passivating solution is：Cerous nitrate：1.8g/L promotees
Into agent H2O2:6ml/L, H3BO3Buffer：2g/L, pH most 2.2；The temperature of antirust treatment is 40 DEG C, pH value 11.4, the time
For 60s；The ingredient of antirust agent is sodium metasilicate 210g/L, triethanolamine 1.3g/L, boric acid 1.6g/L, second two in the antirust treatment
Amine tetraacethyl 0.16g/L, sodium citrate 0.55g/L, cellulose acetate 0.8g/L.
It is 35 DEG C that finally metal tube semi-finished product, which are submerged initially in silane reagent in temperature, and pH carries out silicon under conditions of being 3.8
Alkanisation handles 90s, and silane reagent is 5 by volume with deionized water by the methanol solution of 7% vinyltrimethoxysilane:
95, which are mixed hydrolysis 1.5h, is made；It is handled in confining liquid again after metal tube semi-finished product after silanization treatment are taken out drying
100s, the wherein ingredient of confining liquid are the Na of 9g/L2MoO4.H2O, 12g/L phosphate, 18g/L phosphoric acid, pH 4.4, at closing
The temperature of reason is 58 DEG C.
Embodiment 2：The processing technology of metal tube
By steel alloy machine-shaping, metal tube blank is obtained；The component and its quality percentage of the steel alloy
Than for：C：0.16%, Cr：1.38%, Si：0.22%, Mn：1.08%, Al：0.042%, N：0.001%, Ti：0.18%, P
≤ 0.015%, S≤0.018%, surplus are Fe and inevitable impurity.
Metal tube blank is handled into 100min in 28 DEG C of electroplate liquid；The ingredient of electroplate liquid is：Zinc oxide 6g/L, hydrogen-oxygen
Change sodium：125g/L, nickel：0.7g/L, additive：280ml.
Metal tube blank after plating is washed successively, goes out light processing, Passivation Treatment, washing, antirust treatment, is obtained golden
Belong to pipe semi-finished product；Wherein, go out light processing be it is common it is common go out light technology, the ingredient of passivating solution is：Cerous nitrate：2.2g/L promotees
Into agent H2O2:7ml/L, H3BO3Buffer：2.2g/L, pH most 2.5；The temperature of antirust treatment is 38 DEG C, pH value 11.6, when
Between be 80s；In the antirust treatment ingredient of antirust agent be sodium metasilicate 208g/L, triethanolamine 1.42g/L, boric acid 1.58g/L,
Ethylenediamine tetra-acetic acid 0.17g/L, sodium citrate 0.58g/L, cellulose acetate 0.9g/L.
It is 34 DEG C that finally metal tube semi-finished product, which are submerged initially in silane reagent in temperature, and pH carries out silicon under conditions of being 3.8
Alkanisation handles 85s, and silane reagent is 6 by volume with deionized water by the methanol solution of 7% vinyltrimethoxysilane:
94, which are mixed hydrolysis 1.2h, is made；It is handled in confining liquid again after metal tube semi-finished product after silanization treatment are taken out drying
120s, the wherein ingredient of confining liquid are the Na of 10g/L2MoO4.H2O, 11g/L phosphate, 15g/L phosphoric acid, pH 4.5, at closing
The temperature of reason is 60 DEG C.
Embodiment 3：The processing technology of metal tube
By steel alloy machine-shaping, metal tube blank is obtained；The component and its quality percentage of the steel alloy
Than for：C：0.12%, Cr：1.5%, Si：0.15%, Mn：1.15%, Al：0.03%, N：0.008%, Ti：0.22%, P≤
0.015%, S≤0.018%, surplus are Fe and inevitable impurity.
Metal tube blank is handled into 50min in 30 DEG C of electroplate liquid；The ingredient of electroplate liquid is：Zinc oxide 7g/L, hydrogen-oxygen
Change sodium：130g/L, nickel：1g/L, additive：300ml.
Metal tube blank after plating is washed successively, goes out light processing, Passivation Treatment, washing, antirust treatment, is obtained golden
Belong to pipe semi-finished product；Wherein, go out light processing be it is common it is common go out light technology, the ingredient of passivating solution is：Cerous nitrate：2.5g/L promotees
Into agent H2O2:8ml/L, H3BO3Buffer：3g/L, pH most 3.2；The temperature of antirust treatment is 45 DEG C, pH value 11.8, the time
For 20s；The ingredient of antirust agent is sodium metasilicate 220g/L, triethanolamine 1.5g/L, boric acid 1.8g/L, second two in the antirust treatment
Amine tetraacethyl 0.18g/L, sodium citrate 0.6g/L, cellulose acetate 1.0g/L.
It is 38 DEG C that finally metal tube semi-finished product, which are submerged initially in silane reagent in temperature, and pH carries out silicon under conditions of being 4.5
Alkanisation handles 80s, and silane reagent is 8 by volume with deionized water by the methanol solution of 7% vinyltrimethoxysilane:
92, which are mixed hydrolysis 1h, is made；It is handled in confining liquid again after metal tube semi-finished product after silanization treatment are taken out drying
50s, the wherein ingredient of confining liquid are the Na of 11g/L2MoO4.H2O, 15g/L phosphate, 30g/L phosphoric acid, pH 4.6, at closing
The temperature of reason is 55 DEG C.
Embodiment 4：The processing technology of metal tube
By steel alloy machine-shaping, metal tube blank is obtained；The component and its quality percentage of the steel alloy
Than for：C：0.18%, Cr：1.3%, Si：0.25%, Mn：0.8%, Al：0.05%, N：0.015%, Ti：0.12%, P≤
0.015%, S≤0.018%, surplus are Fe and inevitable impurity.
Metal tube blank is handled into 120min in 20 DEG C of electroplate liquid；The ingredient of electroplate liquid is：Zinc oxide 5g/L, hydrogen-oxygen
Change sodium：110g/L, nickel：0.6g/L, additive：150ml.
Metal tube blank after plating is washed successively, goes out light processing, Passivation Treatment, washing, antirust treatment, is obtained golden
Belong to pipe semi-finished product；Wherein, go out light processing be it is common it is common go out light technology, the ingredient of passivating solution is：Cerous nitrate：2.5g/L promotees
Into agent H2O2:8ml/L, H3BO3Buffer：3g/L, pH most 1.5；The temperature of antirust treatment is 35 DEG C, pH value 11, and the time is
120s；The ingredient of antirust agent is sodium metasilicate 200g/L, triethanolamine 1.2g/L, boric acid 1.5g/L, second two in the antirust treatment
Amine tetraacethyl 0.15g/L, sodium citrate 0.5g/L, cellulose acetate 0.5g/L.
It is 32 DEG C that finally metal tube semi-finished product, which are submerged initially in silane reagent in temperature, and pH carries out silicon under conditions of being 3.5
Alkanisation handles 100s, and the methanol solution that silane reagent passes through 7% vinyltrimethoxysilane is by volume with deionized water
4:96, which are mixed hydrolysis 2h, is made；It is handled in confining liquid again after metal tube semi-finished product after silanization treatment are taken out drying
150s, the wherein ingredient of confining liquid are the Na of 7g/L2MoO4.H2O, 10g/L phosphate, 10g/L phosphoric acid, pH 4.2, at closing
The temperature of reason is 62 DEG C.
Comparative example 1
With differing only in for embodiment 1, metal tube is processed using common alloy steel.
Comparative example 2
With differing only in for embodiment 1, metal tube is processed using ordinary plating process.
Comparative example 3
It is no during processing metal tube to pass through antirust treatment with differing only in for embodiment 1.
Comparative example 4
With differing only in for embodiment 1, common aqua type antirust agent carries out antirust treatment in the prior art for use.
Comparative example 5
With differing only in for embodiment 1, handled using common sealer, i.e., without silanization treatment.
The technique that explanation is not known in the above-described embodiments is the technique of normal conventional in the prior art, is such as processed into
Type goes out light processing etc..
The metal tube processed in embodiment 1-4 and comparative example 1-5 is tested for the property, test result such as 1 institute of table
Show.
Table 1：The performance test for the metal tube processed in embodiment 1-4 and comparative example 1-5
There is red embroidery in 5%NaCl in table 1 in corrosion resistance test, atmospheric corrosion goes out after there are 200 DEG C of 2h barbecues of red embroidery
Existing red embroidery test is to occur the time of red embroidery in metal tube.As known from Table 1, metal tube of the present invention is reasonably closed using compatibility
Jin Gang is processed into metal tube, is first passivated in its electroplating surface zinc-nickel alloy, then by passivating solution of cerous nitrate solution, then
Antirust treatment is carried out to the inner wall of metal tube not being electroplated onto with water soluble anti-rust agent, most afterwards at the closing through carrying out silanization treatment
Reason, increases substantially the corrosion resistance of metal tube, especially inner wall of metal tube can not be electroplated and be also easy to produce corrosion more in the prior art
The case where compare, the present invention not only simple processing also improves the corrosion resistance in pipe, and not other works in influence process
Skill nor affects on other performances of product.
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or supplement to described specific embodiment or substitute by a similar method, but simultaneously
The spirit or beyond the scope defined by the appended claims of the present invention is not deviated by.
Claims (4)
1. a kind of processing technology of metal tube, which is characterized in that the processing technology includes the following steps：
By steel alloy machine-shaping, metal tube blank is obtained；The component and its mass percent of the steel alloy be：C：
0.12-0.18%、Cr：1.3-1.5%、Si：0.15-0.25%、Mn：0.8-1.15%、Al：0.03-0.05%、N：0.008-
0.015%、Ti：0.12-0.22%, P≤0.015%, S≤0.018%, surplus are Fe and inevitable impurity；
Metal tube blank is handled into 50-120min in 20-30 DEG C of electroplate liquid；
Metal tube blank after plating is subjected to out light processing, Passivation Treatment, antirust treatment successively, obtains metal tube semi-finished product；Its
The temperature of middle antirust treatment is 35-45 DEG C, pH value 11-11.8, time 20-120s；Antirust agent in the antirust treatment
Ingredient is sodium metasilicate 200-220g/L, triethanolamine 1.2-1.5g/L, boric acid 1.5-1.8g/L, ethylenediamine tetra-acetic acid 0.15-
0.18g/L, sodium citrate 0.5-0.6g/L, cellulose acetate 0.5-1.0g/L；
Metal tube semi-finished product are obtained into metal tube finished product through Seal treatment；Seal treatment is that metal tube semi-finished product are submerged initially in silane examination
Silanization treatment is carried out in agent, handles 50-150s in confining liquid again after taking out drying, the wherein ingredient of confining liquid is 7-11g/
The Na of L2MoO4.H2The temperature of O, 10-15g/L phosphate, 10-30g/L phosphoric acid, pH 4.2-4.6, Seal treatment is 55-62
℃；Temperature when silanization treatment is 32-38 DEG C, pH 3.5-4.5, time 80-100s.
2. the processing technology of metal tube according to claim 1, which is characterized in that the ingredient of electroplate liquid is：Zinc oxide 5-
7g/L, sodium hydroxide：110-130g/L, nickel：0.6-1g/L, additive：150-300ml.
3. the processing technology of metal tube according to claim 1, which is characterized in that the ingredient of passivating solution is：Cerous nitrate：
1.5-2.5g/L, Urotropinum2O2:5-8ml/L, H3BO3Buffer：0.5-3g/L, pH value 1.5-3.2.
4. the processing technology of metal tube according to claim 1, which is characterized in that the silane reagent passes through 7% ethylene
The methanol solution of base trimethoxy silane is by volume with deionized water（4-8）:（92-96）Hydrolysis 1-2h systems are mixed
.
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| CN106868506A (en) * | 2017-02-21 | 2017-06-20 | 江阴韩钢铁有限公司 | Fuel tube of automobile production technology |
| CN107475756A (en) * | 2017-07-24 | 2017-12-15 | 宁波亚大金属表面处理有限公司 | A kind of black zinc-nickel processing technology |
| CN107653468B (en) * | 2017-11-11 | 2019-03-05 | 贵州航天南海科技有限责任公司 | A kind of ironwork electronickelling antirust solution and preparation method thereof |
| CN110079840A (en) * | 2019-04-26 | 2019-08-02 | 山东金宝电子股份有限公司 | A kind of surface treatment additive package improving copper foil high-temp antioxidizing performance |
| CN110438481A (en) * | 2019-08-26 | 2019-11-12 | 浙江量泰标准件有限公司 | A kind for the treatment of process of antirust bolt |
| CN110964989A (en) * | 2019-11-13 | 2020-04-07 | 浙江金洲管道科技股份有限公司 | Overweight type rigid steel conduit for nuclear power and manufacturing method thereof |
| CN111270279B (en) * | 2020-03-03 | 2021-06-08 | 长沙岱勒新材料科技股份有限公司 | Method for preventing yellow spot defect generated in appearance in diamond wire production process |
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