CN100465355C - Pipe surface ceramizing treatment process - Google Patents
Pipe surface ceramizing treatment process Download PDFInfo
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- CN100465355C CN100465355C CNB2005100708711A CN200510070871A CN100465355C CN 100465355 C CN100465355 C CN 100465355C CN B2005100708711 A CNB2005100708711 A CN B2005100708711A CN 200510070871 A CN200510070871 A CN 200510070871A CN 100465355 C CN100465355 C CN 100465355C
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Abstract
The surface ceramizing treatment process for pipe of non-valve metal or non-metal includes the following steps: 1. forming valve metal layer of 50-150 micron thickness in the inner and outer surface of the pipe through composite filming process; and 2. fixing electrode rod connected to negative pole of DC power source in the inner cavity of the pipe, connecting the pipe to the positive pole of the power source, soaking the pipe into alkali treating liquid inside treating tank, and maintaining constant current density to treat for proper period. The treatment process of the present invention is suitable for the surface ceramizing of pipe unsuitable for being ceramized in micro plasma process and has the problem of ceramizing the inner surface of pipe solved.
Description
Technical field
The invention belongs to the pipe surface ceramizing treatment process technical field.
Background technology
The micro-plasma oxidation technology is the new surface treatment technologies that has grown up on anodised basis since the nearly more than ten years, be called electrolysis Cement Composite Treated by Plasma (Electrolytic PlasmaProcessing) or anode spark deposition (Anodic Spark Deposition) again, be at high-voltage, under the big electric current with Ti, Al, Mg, Nb, Zr, valve metals such as Ta and alloy thereof place treatment solution, sample surfaces produces micro-arc discharge under the pulsed electrical field effect, the final ceramic layer that is metallurgical binding with matrix that generates, this layer ceramic layer have good high temperature resistant, wear-resistant, corrosion-resistant and insulating property.Chinese invention patent CN 1369577A, CN 1388272A and CN1432669A etc. disclose respectively and have utilized the micro-plasma oxidation technology metallic substance such as aluminium, magnesium to be carried out the method for potteryization.
Yet, except Ti, Al, Mg, Nb, Zr, beyond valve metal such as Ta and the alloy thereof, other metallic substance that application quantity is very big on the engineering and non-metallic material can't directly be used the micro-plasma oxidation technology and prepare ceramic layer.And in use come from the needs of corrosion-resistant, wear-resisting and insulating property, these can not directly be used metallic substance and the non-metallic material that the micro-plasma oxidation technology makes ceramic layer and also thirst for putting on one deck pottery " coat ", improve comprehensive use properties.In the last few years, plasma sprayed ceramic, laser melting coating pottery and gas phase ceramic deposition technology are used in some field, be difficult for carrying out post-treatment but the ceramic coating that is to use these technology to obtain has, the treatment process that has is very big to the heat affecting of matrix, and what have is difficult to promote on a large scale because of cost is too high; And for the potteryization of pipe fitting internal surface, all there is technologic difficulty in these ceramicization methods.
Summary of the invention
At the problems referred to above, main purpose of the present invention is to provide a kind of pipe surface ceramizing treatment process that can produce the ceramic layer of high temperature resistant, wear-resistant, corrosion-resistant, long service life at non-valve metal material pipe fitting and nonmetal pipe fitting surfaces externally and internally;
Secondary objective of the present invention is to provide a kind of pipe surface ceramizing treatment process that can produce the ceramic layer of high temperature resistant, wear-resistant, corrosion-resistant, long service life at non-valve metal and alloy pipe fitting thereof and nonmetal pipe fitting internal surface.
For achieving the above object, technical solution of the present invention is:
A kind of pipe surface ceramizing treatment process, described pipe fitting are non-valve metal material pipe fitting or nonmetal pipe fitting, and this technology may further comprise the steps:
(1) adopt the composite membrane-forming method to prepare the valve metal layer that thickness is 50-150 μ m at the pipe fitting surfaces externally and internally;
(2) electrode bar is fixed in the tube intracavity that this surfaces externally and internally preparation has valve metal layer, with the negative pole of this electrode bar connection pulse dc power, this pipe fitting connects the positive pole of this power supply, and with in the alkaline processing liquid in this pipe fitting immersion treatment trough, keep the constant current density value, handle appropriate time.
Further, in described step (two), alkaline processing liquid circulates between circulating cooling system and treatment trough by treatment solution fairlead and treatment solution inlet tube.
Further, described alkaline processing liquid is the silicate alkaline processing liquid, by weight with the cumulative volume ratio: by water glass 8g/L, sodium hydroxide 4g/L, Sodium hexametaphosphate 99 5g/L forms.
A kind of pipe surface ceramizing treatment process, described pipe fitting are non-valve metal material pipe fitting or nonmetal pipe fitting, and this technology may further comprise the steps:
(1) adopt the composite membrane-forming method to prepare the valve metal layer that thickness is 50-150 μ m at the pipe fitting internal surface;
(2) there is the pipe fitting of valve metal layer aperture seal gasket and following aperture seal gasket to be set two ends respectively up and down in this internal surface preparation, electrode bar is arranged at this tube intracavity, these electrode bar two ends are separately fixed on this on aperture seal gasket and following aperture seal gasket; Be filled with alkaline processing liquid between the seal gasket of the aperture up and down of this tube intracavity, electrode bar is connected the negative pole of pulse dc power, the valve metal layer of pipe fitting inner wall connects the positive pole of pulse dc power, keeps the constant current density value, handles appropriate time.
Further, be respectively equipped with the hole on the seal gasket of described upper and lower aperture, in described step (two), hole on the seal gasket of upper and lower aperture is connected with treatment solution inlet tube and treatment solution fairlead respectively, alkaline processing liquid is connected circulating cooling system by this treatment solution inlet tube with the treatment solution fairlead, circulates between described tube intracavity and circulating cooling system.
Further, described alkaline processing liquid is the silicate alkaline processing liquid, by weight with the cumulative volume ratio: by water glass 8g/L, sodium hydroxide 4g/L, Sodium hexametaphosphate 99 5g/L forms.
After adopting above-mentioned technology, the present invention has the following advantages:
(1) at first, to the metallic substance or the non-metallic material pipe fitting that can not directly adopt the micro-plasma oxidation technology, can adopt the composite membrane-forming technology to obtain valve metal layer earlier on the pipe fitting surface, adopt the micro-plasma oxidation technology to prepare ceramic layer again, successful solution the pottery difficult problem on non-valve metal material and non-metallic material pipe fitting surface.
(2) in addition, to the metallic substance or the non-metallic material pipe fitting that can not directly adopt the micro-plasma oxidation technology, can adopt the composite membrane-forming technology to obtain valve metal layer earlier at the pipe fitting internal surface, adopt the micro-plasma oxidation technology to prepare ceramic layer again at pipe fitting inner wall, solved the especially ceramic treatment problem of slender rectangular tube internal surface of pipe fitting internal surface, this technology only carry out potteryization to the pipe fitting internal surface, and keeping intact in the pipe fitting outside, has prevented the influence of treatment solution to non-treat surface.
(3) adopting the micro-plasma oxidation technology to prepare in the process of ceramic layer,, can select to prepare the into treatment sites of ceramic layer arbitrarily by the position that changes seal gasket because the pipe fitting two ends are respectively arranged with aperture seal gasket up and down at pipe fitting inner wall, easy to use.
(4) in treatment process of the present invention; because electrode bar is inserted the pipe fitting endoporus; make electric field uniform distribution in the hole; removed the influence of electric field shielding; and; treatment solution forms between circulating cooling system and pipe fitting inner wall or treatment trough and circulates; guaranteed that treatment solution temperature and concentration are tending towards substantially constant; help generating ceramic layer high temperature resistant uniformly, wear-resistant, corrosion-resistant, long service life on the inside and outside surface of pipe fitting; and help the unified of treatment solution and reclaim, environment has been played the certain protection effect.
(5) the required apparatus structure of this technology is simple, with low cost, and installation and removal are convenient.
Description of drawings
Fig. 1 is pipe fitting internal surface of the present invention pottery makeup interposed structure synoptic diagram (in soak method);
Fig. 2 is pipe fitting surfaces externally and internally pottery makeup interposed structure synoptic diagram (full dip process) of the present invention.
Embodiment:
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
Embodiment 1: at first 45# steel pipe fitting 2 surfaces externally and internallies to internal diameter Φ 50mm carry out hot dip aluminum plating, 45# steel pipe fitting 2 is immersed in the aluminium liquid, temperature of aluminum liquid is controlled between 690～710 ℃, and 45# steel pipe fitting 2 is rotated and moves up and down, the hot dip aluminum plating time is about 20 minutes, forms the Fe-Al alloy layer of 75 μ m and the aluminum layer of 80 μ m in tube surfaces;
Then, as shown in Figure 2, adopt full dip process, will through hot dip aluminum plating in the whole treatment solution that immerses in the treatment trough in the vertically fixing back of 45# steel pipe fitting 2, electrode bar 1 is positioned over pipe fitting 2 lumen centers, then with the negative pole of electrode bar 1 connection pulse dc power 3, pipe fitting 2 connects the positive pole of pulse dc power 3, apply voltage by 3 pairs of pipe fittings 2 of pulse dc power, progressively regulation voltage level keeps constant current density 0.02A/cm
2, the treatment time is 30～50 minutes, and under the effect of electrode bar 1,45# steel pipe fitting 2 surfaces externally and internally growth in situ go out ceramic layer, and this constant current density and treatment time are adjustable according to the actual needs of prepared ceramic layer.Treatment solution is introduced circulating cooling system 5 by treatment solution fairlead 6 in treating processes, by the heat exchanger in the circulating cooling system 5, water pump to the treatment solution cooling that circulates, guarantee treatment solution temperature, concentration substantially constant, and by in the treatment solution inlet tube 7 introducing treatment troughs, formation circulates; This treatment solution can adopt alkaline processing liquid, select the silicate systems treatment solution in this embodiment for use, by weight with the cumulative volume ratio, get water glass 8g/L, sodium hydroxide 4g/L, the alkaline processing liquid that Sodium hexametaphosphate 99 5g/L is configured to, this electrode bar 1 can adopt inert metal rods such as stainless steel bar, tungsten bar or platinum rod.
If only 45# steel pipe fitting 2 internal surfaces are prepared ceramic layer, then only pipe fitting 2 internal surfaces are carried out hot dip aluminum plating, adopt and above-mentioned hot dip aluminum plating same steps as, form the Fe-Al alloy layer of 75 μ m and the aluminum layer of 80 μ m in tube surfaces, then as shown in Figure 1, soak method in the employing, at pipe fitting aperture seal gasket 21 and following aperture seal gasket 22 on two ends are provided with respectively about in the of 2, electrode bar 1 is arranged at pipe fitting 2 inner chambers, and these electrode bar two ends are separately fixed at the centre of aperture seal gasket 21 and following aperture seal gasket 22; Punching on upper and lower aperture seal gasket 21,22, insert treatment solution inlet tube 7 and fairlead 6 respectively, treatment solution enters pipe fitting inside by inlet tube 7 aperture from the pipe fitting endoporus, flows out from the treatment solution fairlead 6 in aperture down, and forms by the treatment solution circulating cooling system and to circulate; Then electrode bar 1 is connected the negative pole of pulse dc power 3, pipe fitting 2 connects the positive pole of pulse dc power 3, applies voltage by 3 pairs of pipe fittings 2 of pulse dc power, and progressively regulation voltage level keeps constant current density 0.02A/cm
2, the treatment time is 30～50 minutes, and under the effect of electrode bar 1,45# steel pipe fitting 2 internal surface growth in situ go out ceramic layer, and this constant current density and treatment time are adjustable according to the actual needs of prepared ceramic layer.
Embodiment 2: the method that polyvinyl chloride pipe fitting 2 surfaces externally and internallies of internal diameter Φ 50mm the are used PVD magnesium layer of the about 50 μ m of deposition of thick in advance at first, then, as shown in Figure 2, adopt full dip process, preparation is had in the whole treatment solution that immerses in the treatment trough in the vertically fixing back of polyvinyl chloride pipe fitting 2 of magnesium valve metal layer, electrode bar 1 is positioned over pipe fitting 2 lumen centers, the negative pole that then electrode bar 1 is connected pulse dc power 3, preparation has the polyvinyl chloride pipe fitting 2 of magnesium valve metal layer to connect the positive pole of pulse dc power 3, apply voltage by 3 pairs of pipe fittings 2 of pulse dc power, progressively regulation voltage level keeps constant current density 0.02A/cm
2, the treatment time is 30～50 minutes, and under the effect of electrode bar 1, polyvinyl chloride pipe fitting 2 surfaces externally and internally growth in situ go out ceramic layer, and this constant current density and treatment time are adjustable according to the actual needs of prepared ceramic layer.This treatment solution for by weight with the cumulative volume ratio, water glass 8g/L, sodium hydroxide 4g/L, the alkaline silicate salt system treatment solution that Sodium hexametaphosphate 99 5g/L is configured to, this electrode bar can adopt inert metal rods such as stainless steel bar, tungsten bar or platinum rod.
If only polyvinyl chloride pipe fitting 2 internal surfaces are prepared ceramic layer, then only to pipe fitting 2 internal surfaces deposition magnesium layer, adopt above-mentioned PVD method, magnesium layer at the about 50 μ m of pipe fitting 2 internal surface deposition of thick, then as shown in Figure 1, adopt embodiment 1 to soak method in described, electrode bar 1 is connected the negative pole of pulse dc power 3, preparation has polyvinyl chloride pipe fitting 2 inwalls of magnesium valve metal layer to connect the positive pole of power supply 3, applies voltage by 3 pairs of pipe fittings 2 of pulse dc power and prepares ceramic layer at polyvinyl chloride pipe fitting 2 internal surfaces.
Embodiment 3: at first copper pipe fitting 2 surfaces externally and internallies to internal diameter Φ 20mm carry out hot dip aluminum plating, form the aluminum layer of 150 μ m on the copper pipe fitting surface;
Then, as shown in Figure 2, adopt full dip process, will through hot dip aluminum plating in the whole treatment solution that immerses in the treatment trough in the vertically fixing back of copper pipe fitting 2, electrode bar 1 is positioned over pipe fitting 2 lumen centers, then with the negative pole of electrode bar 1 connection pulse dc power 3, pipe fitting 2 connects the positive pole of pulse dc power 3, apply voltage by 3 pairs of pipe fittings 2 of pulse dc power, progressively regulation voltage level keeps constant current density 0.02A/cm
2, the treatment time is 30～50 minutes, and under the effect of electrode bar 1, copper pipe fitting 2 surfaces externally and internally growth in situ go out ceramic layer, and this constant current density and treatment time are adjustable according to the actual needs of prepared ceramic layer.Treatment solution is introduced circulating cooling system 5 by treatment solution fairlead 6 in treating processes, by the heat exchanger in the circulating cooling system 5, water pump to the treatment solution cooling that circulates, guarantee treatment solution temperature, concentration substantially constant, and by in the treatment solution inlet tube 7 introducing treatment troughs, formation circulates; This treatment solution adopts the silicate systems treatment solution, with the cumulative volume ratio, gets water glass 8g/L by weight, sodium hydroxide 4g/L, and the alkaline processing liquid that Sodium hexametaphosphate 99 5g/L is configured to, this electrode bar 1 can adopt inert metal rods such as stainless steel bar, tungsten bar or platinum rod.
If only copper pipe fitting 2 internal surfaces are prepared ceramic layer, then only pipe fitting 2 internal surfaces are carried out hot dip aluminum plating, form the aluminum layer of 150 μ m on the pipe fitting surface, then as shown in Figure 1, soak method in the employing, at pipe fitting aperture seal gasket 21 and following aperture seal gasket 22 on two ends are provided with respectively about in the of 2, electrode bar 1 is arranged at pipe fitting 2 inner chambers, these electrode bar two ends are separately fixed at the centre of aperture seal gasket 21 and following aperture seal gasket 22; Punching on upper and lower aperture seal gasket 21,22, insert treatment solution inlet tube 7 and fairlead 6 respectively, treatment solution enters pipe fitting inside by inlet tube 7 aperture from the pipe fitting endoporus, flows out from the treatment solution fairlead 6 in aperture down, and forms by the treatment solution circulating cooling system and to circulate; Then electrode bar 1 is connected the negative pole of pulse dc power 3, pipe fitting 2 connects the positive pole of pulse dc power 3, applies voltage by 3 pairs of pipe fittings 2 of pulse dc power, and progressively regulation voltage level keeps constant current density 0.02A/cm
2, the treatment time is 30～50 minutes, under the effect of electrode bar 1, copper pipe fitting 2 internal surface growth in situ go out ceramic layer.
In addition, adopt full dip process also can only carry out ceramic treatment to above-mentioned pipe fitting 2 inwalls, concrete processing step is: adopt composite membrane-forming method such as PVD method or hot dipping electrochemical plating etc. to deposit the pipe fitting 2 outer walls wrapped with insulation of valve metal layer in advance earlier, handle according to above-mentioned full dip process technological process then.
Claims (4)
1, a kind of pipe surface ceramizing treatment process is characterized in that: described pipe fitting is non-valve metal material pipe fitting, and this technology may further comprise the steps:
(1) adopt the composite membrane-forming method to prepare the valve metal layer that thickness is 50-150 μ m at the pipe fitting surfaces externally and internally;
(2) electrode bar is fixed in the tube intracavity that this surfaces externally and internally preparation has valve metal layer, the negative pole that this electrode bar is connected pulse dc power, this pipe fitting connects the positive pole of this power supply, and with in the alkaline processing liquid in this pipe fitting immersion treatment trough, described alkaline processing liquid is the silicate alkaline processing liquid, by weight with the cumulative volume ratio: by water glass 8g/L, sodium hydroxide 4g/L, Sodium hexametaphosphate 99 5g/L forms, alkaline processing liquid circulates between circulating cooling system and treatment trough by treatment solution fairlead and treatment solution inlet tube, keep the constant current density value, handle appropriate time.
2, a kind of pipe surface ceramizing treatment process is characterized in that: described pipe fitting is non-valve metal material pipe fitting, and this technology may further comprise the steps:
(1) adopt the composite membrane-forming method to prepare the valve metal layer that thickness is 50-150 μ m at the pipe fitting internal surface;
(2) there is the pipe fitting of valve metal layer aperture seal gasket and following aperture seal gasket to be set two ends respectively up and down in this internal surface preparation, be respectively equipped with the hole on the seal gasket of described upper and lower aperture, hole on the seal gasket of upper and lower aperture is connected with treatment solution inlet tube and treatment solution fairlead respectively, electrode bar is arranged at this tube intracavity, these electrode bar two ends are separately fixed on this on aperture seal gasket and following aperture seal gasket; Between the seal gasket of the aperture up and down of this tube intracavity, be filled with alkaline processing liquid, described alkaline processing liquid is the silicate alkaline processing liquid, by weight with the cumulative volume ratio: by water glass 8g/L, sodium hydroxide 4g/L, Sodium hexametaphosphate 99 5g/L forms, alkaline processing liquid is connected circulating cooling system by this treatment solution inlet tube with the treatment solution fairlead, between described tube intracavity and circulating cooling system, circulate, the negative pole that electrode bar is connected pulse dc power, the valve metal layer of pipe fitting inner wall connects the positive pole of pulse dc power, keep the constant current density value, handle appropriate time.
3, a kind of pipe surface ceramizing treatment process is characterized in that: described pipe fitting is nonmetal pipe fitting, and this technology may further comprise the steps:
(1) adopt the composite membrane-forming method to prepare the valve metal layer that thickness is 50-150 μ m at the pipe fitting surfaces externally and internally;
(2) electrode bar is fixed in the tube intracavity that this surfaces externally and internally preparation has valve metal layer, the negative pole that this electrode bar is connected pulse dc power, this pipe fitting connects the positive pole of this power supply, and with in the alkaline processing liquid in this pipe fitting immersion treatment trough, described alkaline processing liquid is the silicate alkaline processing liquid, by weight with the cumulative volume ratio: by water glass 8g/L, sodium hydroxide 4g/L, Sodium hexametaphosphate 99 5g/L forms, alkaline processing liquid circulates between circulating cooling system and treatment trough by treatment solution fairlead and treatment solution inlet tube, keep the constant current density value, handle appropriate time.
4, a kind of pipe surface ceramizing treatment process is characterized in that: described pipe fitting is nonmetal pipe fitting, and this technology may further comprise the steps:
(1) adopt the composite membrane-forming method to prepare the valve metal layer that thickness is 50-150 μ m at the pipe fitting internal surface;
(2) there is the pipe fitting of valve metal layer aperture seal gasket and following aperture seal gasket to be set two ends respectively up and down in this internal surface preparation, be respectively equipped with the hole on the seal gasket of described upper and lower aperture, hole on the seal gasket of upper and lower aperture is connected with treatment solution inlet tube and treatment solution fairlead respectively, electrode bar is arranged at this tube intracavity, these electrode bar two ends are separately fixed on this on aperture seal gasket and following aperture seal gasket; Between the seal gasket of the aperture up and down of this tube intracavity, be filled with alkaline processing liquid, described alkaline processing liquid is the silicate alkaline processing liquid, by weight with the cumulative volume ratio: by water glass 8g/L, sodium hydroxide 4g/L, Sodium hexametaphosphate 99 5g/L forms, alkaline processing liquid is connected circulating cooling system by this treatment solution inlet tube with the treatment solution fairlead, between described tube intracavity and circulating cooling system, circulate, the negative pole that electrode bar is connected pulse dc power, the valve metal layer of pipe fitting inner wall connects the positive pole of pulse dc power, keep the constant current density value, handle appropriate time.
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| CNB2005100708711A CN100465355C (en) | 2005-05-20 | 2005-05-20 | Pipe surface ceramizing treatment process |
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| CNB2005100708711A CN100465355C (en) | 2005-05-20 | 2005-05-20 | Pipe surface ceramizing treatment process |
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| CN100465355C true CN100465355C (en) | 2009-03-04 |
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| CN102296338B (en) * | 2011-06-20 | 2013-10-16 | 昆山振昆纳米科技有限公司 | Pipe fitting surface nanometer processing fixture |
| CN103014706A (en) * | 2011-09-28 | 2013-04-03 | 柯全 | Ceramic membrane layer on metal surface and preparation method thereof |
| US20130175478A1 (en) * | 2012-01-09 | 2013-07-11 | Noble Ion Llc | Reactive, non-corrosive, and dermal-friendly composition and methods for manufacturing |
| CN106757243A (en) * | 2016-12-29 | 2017-05-31 | 中核北方核燃料元件有限公司 | The nickel plating process and nickel plating apparatus of a kind of zirconium alloy pipe |
| CN106835229A (en) * | 2017-02-14 | 2017-06-13 | 哈尔滨东安发动机（集团）有限公司 | A kind of tube kind part hard anodized method long |
| CN110184637B (en) * | 2019-07-10 | 2020-10-09 | 文晓斌 | Ceramic layer for improving friction-reducing and corrosion-resisting performances of inner wall of Venturi tube and preparation method thereof |
| CN111893536A (en) * | 2019-12-23 | 2020-11-06 | 中国航发长春控制科技有限公司 | Tool clamp for micro-arc oxidation of inner cavity of double-cylinder actuator cylinder |
| CN111672729B (en) * | 2020-05-07 | 2022-07-08 | 中国船舶重工集团公司第七二五研究所 | Preparation method of inner wall coating of pipe fitting with inner diameter not less than 30mm |
| CN114232044A (en) * | 2021-05-18 | 2022-03-25 | 西比里电机技术(苏州)有限公司 | Thermoelectric chemical oxidation clamp |
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