CN106222714A - A kind of processing technique of metal tube - Google Patents
A kind of processing technique of metal tube Download PDFInfo
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- CN106222714A CN106222714A CN201610720619.9A CN201610720619A CN106222714A CN 106222714 A CN106222714 A CN 106222714A CN 201610720619 A CN201610720619 A CN 201610720619A CN 106222714 A CN106222714 A CN 106222714A
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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
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- 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
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- 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
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- 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
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- 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
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- 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
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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
- C23C22/48—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
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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
- 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
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
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- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The present invention relates to the processing technique of a kind of metal tube, belong to Alloy Processing field.Solve inner wall of metal tube in prior art and cannot electroplate the problem being easily generated corrosion.Described processing technique includes: by steel alloy machine-shaping, obtains metal tube blank；Metal tube blank is processed in the electroplate liquid of 20 30 DEG C 50 120min；Carry out successively optical processing, Passivation Treatment, antirust treatment by the metal tube blank after plating, obtain metal tube semi-finished product；Wherein the temperature of antirust treatment be 35 45 DEG C, pH value be 11 11.8, the time is 20 120s；Metal tube semi-finished product are obtained metal tube finished product through sealing treatment.The present invention increases substantially corrosion resistance and the mechanical property of metal tube, also improves the corrosion resistance in pipe, and does not affect other techniques, nor affects on other performances of product.
Description
Technical field
The present invention relates to the processing technique of a kind of metal tube, belong to Alloy Processing field.
Background technology
Iron and steel is applied to the various aspects in commercial production and life, has particularly significant in the live and work of the mankind
Effect, be the basis of development in science and technology, but iron and steel easy-to-rust in an atmosphere and tarnishing processes be considerably complicated, to commercial production and people
Life produce adverse effect in various degree, bring unnecessary economic loss.In China, according to Chinese industrial and natural ring
Border Investigation On Corrosion project team survey result in 2008 shows, corrosion the direct economic loss caused reaches 230,000,000,000 yuan, indirect warp
Ji loss is 5000～600,000,000,000 yuan, is equivalent to the 5% of China's gross national product then.Therefore, research prevents steel corrosion
Method just become critically important.
Although prior art improves the decay resistance of metalwork frequently by plating, but when plated metal pipe,
Inside pipe wall because cannot electroplate, as easy as rolling off a log generation corrosion, affect cleannes in product pipe, and some antirust agent can affect processing
The performance of middle plating, and affect metal tube following process.
Summary of the invention
It is an object of the invention to provide the processing technique of the easy metal tube of a kind of method, in this processing technique makes metal tube
Outer rust-proof effect is all preferable, and metal tube mechanical performance is high simultaneously.
The purpose of the present invention can be realized by following technical proposal: the processing technique of a kind of metal tube, described processing
Technique comprises the steps:
By steel alloy machine-shaping, obtain metal tube blank；
Metal tube blank is processed in the electroplate liquid of 20-30 DEG C 50-120min；
Carry out successively optical processing, Passivation Treatment, antirust treatment by the metal tube blank after plating, obtain metal tube half and become
Product；Wherein the temperature of antirust treatment be 35-45 DEG C, pH value be 11-11.8, the time is 20-120s；
Metal tube semi-finished product are obtained metal tube finished product through sealing treatment.
In the processing technique of above-mentioned metal tube, the component of described steel alloy and mass percent thereof 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 is Fe and inevitable impurity.
The steel alloy of metal tube of the present invention reduces carbon content, improves chromium content, by produce between each element
Synergism improves the combination property of metal tube.If in the steel alloy of metal tube of the present invention, carbon content is too low, work in-process
Heat treatment can have a strong impact on intensity and hardness, if the too high plating be not suitable for again under the conditions of follow-up alkalescence of carbon content.At this
Bright steel alloy adds appropriate Si and can put forward heavy alloyed intensity, if Si content is less than 0.15%, bending of metal tube can be affected
Take intensity.Although Mn is solution strengthening element, but in metal tube steel alloy of the present invention, if Fe content is more than 1.15%, then can
Plasticity and the toughness of metal tube are greatly lowered.Chromium element and carbon can produce synergism, form multiple carbide, along with
The increase of chromium constituent content, the quantity of carbide is also constantly increasing.The chromium element of high-load is added, not only in metal tube
Carbide dispersion distributional pattern in metal tube can be changed, it is thus achieved that with Cr23C6And Cr7C3Be main carbide so that it is Dispersed precipitate in
On Ovshinsky matrix, moreover it is possible to improve the wearability of metal tube, hardness, intensity.And the addition of chromium element can improve the through hardening of steel
Property and the antioxygenic property of steel.In metal tube steel alloy of the present invention, the chromium element of high-load can make steel have good height
Temperature antioxidation and the effect of oxidative resistance dielectric corrosion.These the most general low chromium content alloys cannot realize.But when chromium unit
When the content of element is more than 1.5%, the toughness of metal tube and plasticity can be caused to reduce.Ti can improve steel in the steel alloy of metal tube
Strength and toughness, particularly can together with aluminum fixed nitrogen, eliminate the harm that unnecessary nitrogen element causes in steel.Aluminum is base
Basis, maximally effective crystal grain thinning element, mainly exist with AlN form in steel.AlN is distributed mainly on crystal boundary, plays pinning brilliant
Boundary stops the effect that crystal grain is grown up.When in steel alloy, aluminum content is higher, but when nitrogen content is relatively low, then can not form enough AlN
It is made to be distributed in austenite grain boundary uniformly.The position pinning crystal boundary effect that AlN negligible amounts necessarily causes its distribution more is bright
Aobvious, less position then can not stop growing up of austenite crystal by pinning crystal boundary, and this is also to produce mixed crystal, i.e. crystal grain local anomaly
The main cause grown up.Through constantly testing discovery, when in metal tube steel alloy of the present invention, aluminum content is 0.03-0.05%, control
Al/N >=3 processed ensure that, when the heat treatment that product is conventional, mixed crystal phenomenon not occur.
In the processing technique of above-mentioned metal tube, the composition 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 steady potential of alloy layer between zinc and matrix
Between (iron and steel), less potential difference causes corrosion of coating slower.The corrosion product of zinc-nickel alloy is mainly ZnCl2·4Zn
(oH)2.This corrosion product covers at coating surface uniformly, densely, not easy conductive, has good protective effect；And zinc coating
Corrosion product be mainly ZnO, short texture, do not have protective effect.Additionally, in electroplating zinc-nickel alloy layer of the present invention, zinc-
Nickel alloy belongs to y phase (intermetallic compound), has the highest thermodynamic stability, thus corrosion resistance is preferable；And zinc coating is
Kowtowing phase structure (tight hexagonal crystal system), thermodynamic stability is poor.The present invention at metal tube blank surface by above-mentioned plating
Technique electroplating zinc-nickel alloy layer has following several advantage: 1, coating sedimentation rate is fast；2, the covering power of plating solution is high；3, electricity
Stream efficiency is high；4, plating solution current density range width, nickel eutectoid rate is stable, and dispersibility and covering power are excellent, to equipment corrosion
Property is little；5, the zinc in zinc-nickel alloy coating, nickel content directly affect the decay resistance (deterioration rate) of pressure metal tube, and coating
Middle zinc, the content of nickel are affected by solution composition, and in coating of the present invention, the mass fraction of nickel can strictly control, the composition in solution
Being easy to stability contorting, passivating film is the most easy to change, and waste water processes simple；6, electroplate liquid of the present invention is stable, can keep life-time service,
Substantially increase the raw-material utilization rate of plating.
Wherein, the additive described in electroplate liquid is the most common additive, can be rare earth addition, poly-alkyl Asia
Amine additive.
In the processing technique of above-mentioned metal tube, in Passivation Treatment, the composition of passivating solution is: cerous nitrate: 1.5-2.5g/L,
Urotropinum2O2: 5-8ml/L, H3BO3Buffer agent: 0.5-3g/L, pH most 1.5-3.2.
Similar to electrogalvanizing, for improving the corrosion resistance of zn-ni alloy deposits, increase its dicoration, improve coating and matrix gold
Adhesion between genus, electroplated zinc nickel alloy needs also exist for being passivated processing after plating terminates so that it is Surface Creation one layer is steady
Qualitative height, the passivating film of dense structure.Different from general chromating, the present invention is with cerous nitrate solution as passivating solution, auxiliary
With hydrogen peroxide oxidant, to metal tube immersion treatment, to reach the purpose of inhibition.
During Passivation Treatment of the present invention, too low cerium salinity or too low pH value all can cause the general rust of metal tube,
So that its film-formation result can be affected, reduce the corrosion resistance of conversion film.Passivation effect is not along with the increase of cerous nitrate concentration yet
And increase, its reason is that the concentration of cerous nitrate is the highest, and the thicknesses of layers of formation is the biggest, and the internal stress of passivating film is also got over. always
Greatly, internal stress is excessive, passivating film can be caused to ftracture, thus reduce the decay resistance of passivating film.When pH value is too low, negative electrode master
Evolving hydrogen reaction to be occurred, is unfavorable for the deposition of cerium, there is also substantial amounts of pore simultaneously on passivating film surface, thus causes passivation
The decay resistance of film reduces.If pH value is too high, it is unfavorable for that again in solution, cerium is in the deposition of substrate surface.Find through test,
During pH1.5-3.2, using passivating solution to be as above passivated metal tube of the present invention processing, metal tube has preferable copper sulfate
Drop performance, resistance to Neutral Salt Spray Corrosion performance, bigger AC impedance, passivation effect is fabulous.
In the processing technique of above-mentioned metal tube, before going out optical processing after plating, all wrap before antirust treatment after Passivation Treatment
Include washing.
In the processing technique of above-mentioned metal tube, in described antirust treatment, the composition of antirust agent is sodium silicate 200-220g/
L, triethanolamine 1.2-1.5g/L, boric acid 1.5-1.8g/L, ethylenediaminetetraacetic acid 0.15-0.18g/L, sodium citrate 0.5-
0.6g/L, cellulose acetate 0.5-1.0g/L.
The rust preventing used steel alloy at present is mainly aqua type antirust agent, but containing nitrous in aqua type antirust agent
Hydrochlorate, although but traditional nitrous acid salt form antirust agent rust-proof effect is good poisonous to environment and human body.And in the present invention
Antirust agent is the water soluble anti-rust agent without nitrite, by the sodium silicate in rational proportion antirust agent, triethanolamine, boron
Acid, ethylenediaminetetraacetic acid, sodium citrate, cellulose acetate, these composition toxic and side effects are minimum, environmental protection and favorable rust preventing effect, energy
Form layer protecting film on the inner wall of metal tube surface not having plating, delay the time again corroded, and then improve metal
The service life of pipe.
As preferably, the temperature of antirust treatment is 38-42 DEG C, pH value is 11.2-11.6, and the time is 40-80s.
In the processing technique of above-mentioned metal tube, sealing treatment is carried out for being submerged initially in silane reagent by metal tube semi-finished product
Silanization treatment, takes out dried process 50-150s in confining liquid again, and wherein the composition of confining liquid is 7-11g/L's
Na2MoO4.H2O, 10-15g/L phosphate, 10-30g/L phosphoric acid, pH is 4.2-4.6, and the temperature of sealing treatment is 55-62 DEG C.
Metal tube of the present invention processing first carries out silanization treatment before molybdate solution sealing treatment, improves it further
Decay resistance.After molybdate solution sealing treatment, the most continuous whole densification of metal tube surface film layer.Molybdate is preferably
It is filled with pin hole and the micro-crack of silane film, matrix is served good physical barriers effect, reduces what matrix was corroded
Probability.Along with the prolongation of molybdate off-period, corroded area first reduces, and corrosion resistance improves.But exceed between when closed
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
Being first filled with the hole of silane film after in saline solution, anti-corrosion capability improves；Along with the increase of close process time, molybdate turns
The thickness changing film is continuously increased, and anti-corrosion capability continues to increase, and reaches optimum state during to sealing treatment 100s；Thereafter along with closing
The process time continue to increase above 150s, conversion film can occur cracking phenomena, and is increasingly becoming corrosion proof Dominated Factors, leads
Cause metal tube surface film layer etch resistant properties globality and present downward trend.
As preferably, temperature during silanization treatment is 32-38 DEG C, and pH is 3.5-4.5, and the time is 80-100s.
As preferably, described silane reagent passes through methanol solution and the deionized water of 7% vinyltrimethoxy silane
Prepare for 4-8:92-96 mix and blend hydrolysis 1-2h by volume.
The silane reagent synthesis used in the present invention is simple, and this is pollution-free, and silanization treatment process is simple, this silane reagent
Molecule contain X3Si (CH2) nY structure (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 at metal base surface, and (M is gold to dehydration formation Si-O-M further
Belong to matrix), combine with covalent bond, silanol is intermolecular simultaneously is mutually condensed into Si-O-Si chain, and final polymerization forms thicker three-dimensional
Network structure film layer, covers at metal base surface, thus increases substantially the corrosion resistance of metal tube matrix.
Compared with prior art, the method have the advantages that
1, the components compatibility of metal tube of the present invention is reasonable, by the collaborative work produced between its component and element thereof
With, improve the performances such as the hardness of metal tube, intensity, corrosion resistance.
2, metal tube of the present invention is first at its electroplating surface zinc-nickel alloy, then is passivated with cerous nitrate solution for passivating solution,
Then carry out antirust treatment with the water soluble anti-rust agent inner wall of metal tube to not being electroplated onto, after through carrying out the envelope of silanization treatment
Close process, improve corrosion resistance and the mechanical performance of metal tube further.
Detailed description of the invention
The following is the specific embodiment of the present invention, technical scheme is further described, but the present invention is also
It is not limited to these embodiments.
Embodiment 1: the processing technique of metal tube
By steel alloy machine-shaping, obtain metal tube blank；The component of described described steel alloy and percent mass thereof
Ratio is: 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 is Fe and inevitable impurity.
Metal tube blank is processed in the electroplate liquid of 25 DEG C 80min；The composition of electroplate liquid is: zinc oxide 6g/L, hydrogen-oxygen
Change sodium: 120g/L, nickel: 0.8g/L, additive: 220ml.
Carry out successively washing, going out optical processing, Passivation Treatment, washing, antirust treatment by the metal tube blank after plating, obtain golden
Belong to pipe semi-finished product；Wherein, going out optical processing is the most common to go out light technique, and the composition of passivating solution is: cerous nitrate: 1.8g/L, promotees
Enter agent H2O2: 6ml/L, H3BO3Buffer agent: 2g/L, pH most 2.2；The temperature of antirust treatment is 40 DEG C, pH value is 11.4, the time
For 60s；In described antirust treatment, the composition of antirust agent is sodium silicate 210g/L, triethanolamine 1.3g/L, boric acid 1.6g/L, second two
Amine tetraacethyl 0.16g/L, sodium citrate 0.55g/L, cellulose acetate 0.8g/L.
Finally being submerged initially in silane reagent by metal tube semi-finished product in temperature is 35 DEG C, and pH is to carry out silicon under conditions of 3.8
Alkanisation processes 90s, and silane reagent is 5 by methanol solution and the deionized water of 7% vinyltrimethoxy silane by volume:
95 mix and blend hydrolysis 1.5h prepare；Metal tube semi-finished product after silanization treatment are taken out dried process in confining liquid again
100s, wherein the composition of confining liquid is the Na of 9g/L2MoO4.H2O, 12g/L phosphate, 18g/L phosphoric acid, pH is 4.4, at closing
The temperature of reason is 58 DEG C.
Embodiment 2: the processing technique of metal tube
By steel alloy machine-shaping, obtain metal tube blank；The component of described described steel alloy and percent mass thereof
Ratio is: 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 is Fe and inevitable impurity.
Metal tube blank is processed in the electroplate liquid of 28 DEG C 100min；The composition of electroplate liquid is: zinc oxide 6g/L, hydrogen-oxygen
Change sodium: 125g/L, nickel: 0.7g/L, additive: 280ml.
Carry out successively washing, going out optical processing, Passivation Treatment, washing, antirust treatment by the metal tube blank after plating, obtain golden
Belong to pipe semi-finished product；Wherein, going out optical processing is the most common to go out light technique, and the composition of passivating solution is: cerous nitrate: 2.2g/L, promotees
Enter agent H2O2: 7ml/L, H3BO3Buffer agent: 2.2g/L, pH most 2.5；The temperature of antirust treatment is 38 DEG C, pH value is 11.6, time
Between be 80s；In described antirust treatment, the composition of antirust agent is sodium silicate 208g/L, triethanolamine 1.42g/L, boric acid 1.58g/L,
Ethylenediaminetetraacetic acid 0.17g/L, sodium citrate 0.58g/L, cellulose acetate 0.9g/L.
Finally being submerged initially in silane reagent by metal tube semi-finished product in temperature is 34 DEG C, and pH is to carry out silicon under conditions of 3.8
Alkanisation processes 85s, and silane reagent is 6 by methanol solution and the deionized water of 7% vinyltrimethoxy silane by volume:
94 mix and blend hydrolysis 1.2h prepare；Metal tube semi-finished product after silanization treatment are taken out dried process in confining liquid again
120s, wherein the composition of confining liquid is the Na of 10g/L2MoO4.H2O, 11g/L phosphate, 15g/L phosphoric acid, pH is 4.5, at closing
The temperature of reason is 60 DEG C.
Embodiment 3: the processing technique of metal tube
By steel alloy machine-shaping, obtain metal tube blank；The component of described described steel alloy and percent mass thereof
Ratio is: 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 is Fe and inevitable impurity.
Metal tube blank is processed in the electroplate liquid of 30 DEG C 50min；The composition of electroplate liquid is: zinc oxide 7g/L, hydrogen-oxygen
Change sodium: 130g/L, nickel: 1g/L, additive: 300ml.
Carry out successively washing, going out optical processing, Passivation Treatment, washing, antirust treatment by the metal tube blank after plating, obtain golden
Belong to pipe semi-finished product；Wherein, going out optical processing is the most common to go out light technique, and the composition of passivating solution is: cerous nitrate: 2.5g/L, promotees
Enter agent H2O2: 8ml/L, H3BO3Buffer agent: 3g/L, pH most 3.2；The temperature of antirust treatment is 45 DEG C, pH value is 11.8, the time
For 20s；In described antirust treatment, the composition of antirust agent is sodium silicate 220g/L, triethanolamine 1.5g/L, boric acid 1.8g/L, second two
Amine tetraacethyl 0.18g/L, sodium citrate 0.6g/L, cellulose acetate 1.0g/L.
Finally being submerged initially in silane reagent by metal tube semi-finished product in temperature is 38 DEG C, and pH is to carry out silicon under conditions of 4.5
Alkanisation processes 80s, and silane reagent is 8 by methanol solution and the deionized water of 7% vinyltrimethoxy silane by volume:
92 mix and blend hydrolysis 1h prepare；Metal tube semi-finished product after silanization treatment are taken out dried process in confining liquid again
50s, wherein the composition of confining liquid is the Na of 11g/L2MoO4.H2O, 15g/L phosphate, 30g/L phosphoric acid, pH is 4.6, at closing
The temperature of reason is 55 DEG C.
Embodiment 4: the processing technique of metal tube
By steel alloy machine-shaping, obtain metal tube blank；The component of described described steel alloy and percent mass thereof
Ratio is: 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 is Fe and inevitable impurity.
Metal tube blank is processed in the electroplate liquid of 20 DEG C 120min；The composition of electroplate liquid is: zinc oxide 5g/L, hydrogen-oxygen
Change sodium: 110g/L, nickel: 0.6g/L, additive: 150ml.
Carry out successively washing, going out optical processing, Passivation Treatment, washing, antirust treatment by the metal tube blank after plating, obtain golden
Belong to pipe semi-finished product；Wherein, going out optical processing is the most common to go out light technique, and the composition of passivating solution is: cerous nitrate: 2.5g/L, promotees
Enter agent H2O2: 8ml/L, H3BO3Buffer agent: 3g/L, pH most 1.5；The temperature of antirust treatment is 35 DEG C, pH value is 11, and the time is
120s；In described antirust treatment, the composition of antirust agent is sodium silicate 200g/L, triethanolamine 1.2g/L, boric acid 1.5g/L, second two
Amine tetraacethyl 0.15g/L, sodium citrate 0.5g/L, cellulose acetate 0.5g/L.
Finally being submerged initially in silane reagent by metal tube semi-finished product in temperature is 32 DEG C, and pH is to carry out silicon under conditions of 3.5
Alkanisation processes 100s, and silane reagent by the methanol solution of 7% vinyltrimethoxy silane with deionized water is by volume
4:96 mix and blend hydrolysis 2h prepares；Metal tube semi-finished product after silanization treatment are taken out dried process in confining liquid again
150s, wherein the composition of confining liquid is the Na of 7g/L2MoO4.H2O, 10g/L phosphate, 10g/L phosphoric acid, pH is 4.2, at closing
The temperature of reason is 62 DEG C.
Comparative example 1
With differing only in of embodiment 1, use common alloy steel processing metal tube.
Comparative example 2
With differing only in of embodiment 1, use ordinary plating process processing metal tube.
Comparative example 3
With differing only in of embodiment 1, processing metal tube during not through antirust treatment.
Comparative example 4
With differing only in of embodiment 1, common aqua type antirust agent in prior art is used to carry out antirust treatment.
Comparative example 5
With differing only in of embodiment 1, common sealer is used to process, i.e. without silanization treatment.
The technique not clearly stated in the above-described embodiments is the technique of normal conventional in prior art, as being processed into
Type, go out optical processing etc..
Performance test is carried out, test result such as table 1 institute by embodiment 1-4 and comparative example 1-5 are processed the metal tube obtained
Show.
Table 1: process the performance test of the metal tube obtained in embodiment 1-4 and comparative example 1-5
In table 1, the 5%NaCl in corrosion resistance test occurs that red embroidery, atmospheric corrosion go out after there are 200 DEG C of 2h barbecues of red embroidery
Existing red embroidery test is all the time to occur red embroidery in metal tube.As known from Table 1, metal tube of the present invention uses compatibility reasonably to close
Jin Gang is processed into metal tube, first at its electroplating surface zinc-nickel alloy, then is passivated with cerous nitrate solution for passivating solution, then
Carry out antirust treatment with the water soluble anti-rust agent inner wall of metal tube to not being electroplated onto, after at closing through carrying out silanization treatment
Reason, increases substantially inner wall of metal tube in the corrosion resistance of metal tube, the most relatively prior art and cannot electroplate and be easily generated corrosion
Situation compare, the present invention not only processes simplicity, 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 to present invention spirit explanation for example.Technology neck belonging to the present invention
Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by the technical staff in territory, but also
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
Claims (9)
1. the processing technique of a metal tube, it is characterised in that described processing technique comprises the steps:
By steel alloy machine-shaping, obtain metal tube blank；
Metal tube blank is processed in the electroplate liquid of 20-30 DEG C 50-120min；
Carry out successively optical processing, Passivation Treatment, antirust treatment by the metal tube blank after plating, obtain metal tube semi-finished product；Its
The temperature of middle 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 metal tube finished product through sealing treatment.
The processing technique of metal tube the most according to claim 1, it is characterised in that the component of described steel alloy and
Mass percent is: 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 is Fe and can not keep away
The impurity exempted from.
The processing technique of metal tube the most according to claim 1, it is characterised in that the composition of electroplate liquid is: zinc oxide 5-
7g/L, sodium hydroxide: 110-130g/L, nickel: 0.6-1g/L, additive: 150-300ml.
The processing technique of metal tube the most according to claim 1, it is characterised in that the composition of passivating solution is: cerous nitrate:
1.5-2.5g/L, Urotropinum2O2: 5-8ml/L, H3BO3Buffer agent: 0.5-3g/L, pH most 1.5-3.2.
The processing technique of metal tube the most according to claim 1, it is characterised in that the one-tenth of antirust agent in described antirust treatment
It is divided into sodium silicate 200-220g/L, triethanolamine 1.2-1.5g/L, boric acid 1.5-1.8g/L, ethylenediaminetetraacetic acid 0.15-
0.18g/L, sodium citrate 0.5-0.6g/L, cellulose acetate 0.5-1.0g/L.
The processing technique of metal tube the most according to claim 1 or 5, it is characterised in that the temperature of antirust treatment is 38-42
DEG C, pH value be 11.2-11.6, the time is 40-80s.
The processing technique of metal tube the most according to claim 1, it is characterised in that sealing treatment is by metal tube semi-finished product
It is submerged initially in silane reagent and carries out silanization treatment, take out the dried 50-150s that processes in confining liquid the most again, wherein confining liquid
Composition is the Na of 7-11g/L2MoO4.H2O, 10-15g/L phosphate, 10-30g/L phosphoric acid, pH is 4.2-4.6, sealing treatment
Temperature is 55-62 DEG C.
The processing technique of metal tube the most according to claim 7, it is characterised in that temperature during silanization treatment is 32-
38 DEG C, pH is 3.5-4.5, and the time is 80-100s.
The processing technique of metal tube the most according to claim 7, it is characterised in that described silane reagent passes through 7% second
The methanol solution of thiazolinyl trimethoxy silane and deionized water are (4-8) by volume: (92-96) mix and blend hydrolysis 1-2h system
?.
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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 |
| CN107653468A (en) * | 2017-11-11 | 2018-02-02 | 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 |
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| CN111270279A (en) * | 2020-03-03 | 2020-06-12 | 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 |
| 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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