CN103008216A - Inner wall treatment process of aluminum alloy pressure gas cylinder and treating device - Google Patents

Inner wall treatment process of aluminum alloy pressure gas cylinder and treating device Download PDF

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Publication number
CN103008216A
CN103008216A CN2012104890836A CN201210489083A CN103008216A CN 103008216 A CN103008216 A CN 103008216A CN 2012104890836 A CN2012104890836 A CN 2012104890836A CN 201210489083 A CN201210489083 A CN 201210489083A CN 103008216 A CN103008216 A CN 103008216A
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gas cylinder
aluminium alloy
spraying
gas
interior wall
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CN2012104890836A
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CN103008216B (en
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吴海
韩桥
周泽义
王德发
胡树国
盖良京
刘新志
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National Institute of Metrology
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National Institute of Metrology
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Abstract

The invention discloses an inner wall treatment process of an aluminum alloy pressure gas cylinder and a spraying device. The process comprises the following steps on the inner surface of the gas cylinder: A, cleaning: using an aluminum alloy cleaning agent and clear water to remove residual pollutants such as grease and the like; B, passivating by ozone: using the ozone to deactivate the inner surface; C, siliconiting: spraying a silane coupling agent on the inner surface to form a compact siliconiting coating; D, forming a silicon oxide coating: using a tetraethoxysilane hydrating solution to spray the inner surface to form the silicon oxide coating; and E, forming a fluorocarbon resin coating: spraying fluorocarbon resin paint on the inner surface to form the fluorocarbon resin coating. The process can be used for treating the inner wall of the aluminum alloy pressure gas cylinder, and has the characteristics of simplicity in process and device; and the treated gas cylinder can be used for storing absorbing gas and corrosive gas without affecting the quantity value of a standard gas substance, and has better stability.

Description

Interior wall processing technology and the treating apparatus of aluminium alloy pressure cylinder
Technical field
The present invention relates to field of metal surface treatment, a kind for the treatment of process of aluminum alloy material gas cylinder inner surface is provided, and corresponding treating apparatus is provided.
Background technology
The gaseous sample analysis in the fields such as environment measuring, petrochemical industry and electronics industry all need be used the gas standard material, for example NH 3, NO xOne of the emphasis detected object in environment measuring field, H 2The S sulfides detects and comes into one's own in industries such as oil, chemical industry, often uses Cl in electronic semi-conductor's industry 2, the strong active gas such as HCl; The gas analysis in these fields usually needs the gas standard material of minor levels (referring generally to tens μ mol/mol) that corresponding instrument is calibrated.Yet because above-mentioned gas itself has the features such as adsorptivity, corrosivity, complicated physical and chemical process can occur with container inner wall in them in the usual pressure container.This physical and chemical process affects on the one hand gas standard amount of substance value and changes, and causes stability bad; Can produce potential danger on the other hand.
The general aluminium alloy gas cylinder that adopts is as the pressure vessel in the calibrating gas storage and transport process, in order to solve the stability problem of gas standard material in aluminium alloy gas cylinder that contains active component, guarantee the degree of accuracy and the long-term stability of gas standard material value, be necessary to provide a kind for the treatment of process method for its inwall and corresponding equipment.
Summary of the invention
The present invention just is based on above-mentioned purpose, and a kind of interior wall processing technology for aluminium alloy gas cylinder is provided, and treating apparatus also is provided simultaneously.
For reaching this purpose, the present invention by the following technical solutions:
A kind of interior wall processing technology of aluminium alloy pressure cylinder comprises the following steps to the gas cylinder inner surface:
A, cleaning: adopt aluminum alloy cleaning agent and clear water except degrease and oxide layer;
B, ozone passivation: utilize ozone so that the inner surface deactivation;
C, silanization: inwardly the surface spraying silane coupler forms fine and close silanization coating;
D, formation silica coating: adopt the internal surface spraying of teos hydrolysis solution to form silica coating;
E, formation Fluorocarbon resin coating: internally surface spraying fluorocarbon resin lacquer forms Fluorocarbon resin coating.
Further, described steps A comprises: after aluminium alloy scavenger specially and 50 ~ 60 ℃ of warm water are pressed the 1:5 dilution proportion, get the 500mL dilution and pour into gas cylinder, add wear-resisting bead, gas cylinder is positioned at the horizontal rolling machine, continuous rolling is 10min approximately, rolling speed is controlled at 25 ~ 35rpm, then with running water flushing 3 ~ 5 times, with washed with de-ionized water at least 2 times, place 80 ℃ of baking ovens to dry up with pure nitrogen gas gas cylinder rear airtight again.
Further, described step B comprises: the gas cylinder that keeps dry is connected upper ozone generator, and the control ozone concentration is 30 ~ 100mg/m 3, flow is 0.5 ~ 2L/min, continues ventilation 10 ~ 20min, makes the gas cylinder inner surface form compact oxidation layer, then passes into dried compressed air and removes residual ozone.
Further, select and the aluminium alloy silane coupler of compatibility mutually, utilize spray equipment that silane coupler is sprayed into inner surface of container, coating thickness 1 ~ 5 μ m.
Further, described step D comprises teos hydrolysis, polycondensation, spraying and four steps of curing, and ethyl orthosilicate and absolute ethyl alcohol are pressed the 1:9 mixed dissolution; Then add oxalic acid aqueous solution prehydrolysis, control PH=3 ± 0.5 is preferably 2.8 ~ 3.5, and prehydrolysis time 2h ~ 3h obtains teos hydrolysis solution; With said hydrolyzed solution, add 2% ammoniacal liquor, regulate between PH to 8 ~ 11, polycondensation process occurs; Solution sprays or showering immediately after the polycondensation, is being no more than ventilation freeze-day with constant temperature 8 ~ 12h under 60 ℃ of temperature immediately after finishing, and the control thickness is at 10 ~ 30 μ m.
Further, described step e comprises:
Spraying seal coat: seal coat, normal temperature solidifying fluorine carbon resin special curing agent, diluent are stirred according to the ratio of 10:1:4, spray to the gas cylinder inwall, obtain the seal coat layer of thickness 10 μ m, surface drying 5 ~ 10min;
Finish paint spraying: fluorocarbon resin and normal temperature solidifying fluorine carbon resin special curing agent, diluent according to 10:1:4 ratio mixing and stirring, sprays three times to the pressure vessel inner surface, descend to toast 30 ~ 60min in 60 ~ 90 ℃.
Preferably, described silane coupler is the silane coupler that contains amino or acrylic.
Preferably, adopt repeatedly spraying during the spraying silane coupler, after each spraying gas cylinder is transferred to baker, passing under dried compressed air or the nitrogen state, under 40 ~ 50 ℃ of temperature, toast at least 20min.
Preferably, described seal coat is the seal coat of acrylic resin type, and described fluorocarbon resin is the fluorocarbon resin of fluoroolefins-ethene multiple copolymer type.
A kind of spray equipment of the interior wall processing technology for above-mentioned aluminium alloy pressure cylinder is provided simultaneously, comprise air compressor, spray gun, pedestal and deck, gas cylinder is fixed by the deck that is positioned on the pedestal, and described air compressor provides feed power, atomizing source of the gas and switch control gas for spray gun; Described spray gun is installed on the pedestal by the spray gun vertical movement mechanism, and with the stock atomising head, can stretch into to carry out inwall in the gas cylinder and hold spraying.
Interior wall processing technology and the spray equipment of aluminium alloy pressure cylinder of the present invention, the inwall that can be used for the aluminium alloy pressure cylinder is processed, have technique and install simple characteristics, gas cylinder after the processing can be used for the accumulating of corrosive gas, can not affect gas standard amount of substance value, have better stability.
Description of drawings
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and by the specific embodiment.
Fig. 1 is the structural principle schematic diagram of gas cylinder inner wall spraying device of the present invention.
Among the figure:
1, air compressor; 2, paint can; 3, oil water separator; 4, stop valve; 5, spray gun; 6, gas cylinder; 7, deck; 8, pedestal; 9, spray gun vertical movement mechanism; 10, stock atomising head.
The specific embodiment
The below provides the detailed process that an aluminium alloy gas cylinder inwall is processed:
1, the cleaning of aluminium alloy pressure vessel inner surface, ozone passivation
At first, clean step according to previously described pressure vessel inner surface, after aluminium alloy scavenger specially and 60 ℃ of warm water are pressed the 1:5 dilution proportion, get the 500mL dilution and pour into gas cylinder, gas cylinder is placed horizontally at the 10min that rolls on the rolling machine, rolling speed is 30rpm, then pour out dilution, with running water flushing 5 times, use again washed with de-ionized water 3 times, place 80 ℃ of baking ovens to purge 60min with pure nitrogen gas pressure vessel; Then gas cylinder is connected upper ozone generator, passing into flow is the 80mg/m that contains of 1L/min flow 3The oxygen of ozone is 10min approximately; Then use dried compressed air, 1L/min washes 10min, makes the passivation of gas cylinder inner surface adsorption activity point.
2, the silanization of aluminium alloy pressure vessel inner surface and generation silica coating
With above-mentioned gas cylinder through the ozone passivation, further inner surface is carried out silanization, the silane coupler that preferably contains amino or acrylic, such as the KH550 silane coupler, in the KH550 silane coupler: deionized water: isopropyl alcohol mixes in the 4:1:95 ratio, and adding the vinegar acid for adjusting pH value is 4 ~ 5, stirs 20min, obtain the silane coupler working solution, the silane coupler working solution is sprayed at the pressure vessel inner surface; Control paint can output pressure 2kg/cm 2, the vertical translational speed of spray gun is 3cm/s, spray complete after, pass into pure nitrogen gas and dry up 5min, and then spraying, dry up 2 times, form the silane rete of 1 ~ 10 μ m at the gas cylinder inner surface.
Then ethyl orthosilicate and absolute ethyl alcohol are pressed the 1:9 mixed dissolution; Then add oxalic acid aqueous solution prehydrolysis, control PH=3 ± 0.5 is preferably 2.8 ~ 3.5; Prehydrolysis time 2h ~ 3h; Obtain teos hydrolysis solution, with said hydrolyzed solution, add 2% ammoniacal liquor, regulate between PH to 8 ~ 11, be preferably 9.5 ~ 9.7, polycondensation process occurs, obtain working solution.Then above-mentioned working solution is sprayed into the gas cylinder inner surface with the silane rete, solution sprays or showering immediately after the polycondensation, to avoid forming SiO 2Gel, control paint can output pressure 2kg/cm 2, the vertical translational speed of spray gun is 3cm/s, spray complete after, pass into pure nitrogen gas and dry up 5min.And then spray, dry up 2 times, form the silicon oxide layer of 1 ~ 10 μ m at the gas cylinder inner surface, at last with gas cylinder ventilation freeze-day with constant temperature 8 ~ 12h under 60 ℃ of temperature.
3, aluminium alloy pressure vessel inner surface generates Fluorocarbon resin coating
Above-mentioned inner surface is further generated Fluorocarbon resin coating, the seal coat of seal coat preferred acrylic resins type, seal coat, normal temperature solidifying fluorine carbon resin special curing agent, all-purpose diluent are mixed according to the ratio of 10:1:4, stir, control paint can output pressure 2kg/cm 2, the vertical translational speed of spray gun is 3cm/s, sprays to the gas cylinder inwall.Spray complete after, pass into pure nitrogen gas and dry up 5min, and then spraying, dry up 2 times, form the seal coat layer of 1 ~ 10 μ m at the pressure vessel inner surface; Spray at last fluorine carbon coating varnish three times, fluorocarbon resin is preferably the fluorocarbon resin of fluoroolefins-ethene multiple copolymer type and curing agent, diluent according to 10:1:4 ratio mixing and stirring, spray to the pressure vessel inner surface, in 60 ~ 90 ℃ of lower baking 30 ~ 60min, preferably baking 40min gets final product under 80 ° of C.
Fig. 1 provides telogenesis spray equipment in the gas cylinder that is used for above-mentioned technique, air compressor 1 is as the auxiliary source of the gas of spray equipment, is mainly feeding device paint can 2 and spray gun 5 provides power gas, and a voltage regulating meter is set in paint can 2, the pressure of control power gas, the indirect regulation feeding rate; The compressed air that enters spray gun 5 needs to process through oil water separator 3 in advance, then is divided into two-way, and one tunnel switch control gas as spray gun 5 comes the coating of switch spray gun 5 inside to supply with by stop valve 4 control gas pressures; Another road is as the atomizer source of spray gun.
Spray gun 5 is arranged at the vertical movement mechanism 9 on the pedestal 8, and by the vertical translational speed of computer program control spray gun 5, purpose is the coating that obtains different-thickness under certain feeding rate; Spray gun 5 is with stock atomising head 10, it is long that stock atomising head 10 is no less than 80cm, be conducive to like this bottom that atomising head 10 can enter gas cylinder 6, gas cylinder 6 is fixing by the deck 7 that is positioned on the pedestal 8, during use, the stock atomising head 10 of adjusting spray gun 5 just in time is positioned at the center of gas cylinder 6, can form to inwall the coating of even thickness.
Above-mentioned explanation is specifying for the feasible embodiment of the present invention; and this embodiment limits claim of the present invention, does not allly break away from that equivalence that the technology of the present invention spirit makes is implemented or the mode of change all should be contained in the claimed claim of the application.

Claims (10)

1. the interior wall processing technology of an aluminium alloy pressure cylinder is characterized in that comprising the following steps to the gas cylinder inner surface:
A, cleaning: adopt aluminum alloy cleaning agent and clear water except degrease and oxide layer;
B, ozone passivation: utilize ozone so that the inner surface deactivation;
C, silanization: inwardly the surface spraying silane coupler forms fine and close silanization coating;
D, formation silica coating: adopt the internal surface spraying of teos hydrolysis solution to form silica coating;
E, formation Fluorocarbon resin coating: internally surface spraying fluorocarbon resin lacquer forms Fluorocarbon resin coating.
2. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 1, it is characterized in that, described steps A comprises: after aluminium alloy scavenger specially and 50 ~ 60 ℃ of warm water are pressed the 1:5 dilution proportion, get the 500mL dilution and pour into gas cylinder, add wear-resisting bead, gas cylinder is positioned at the horizontal rolling machine, continuous rolling is 10min approximately, rolling speed is controlled at 25 ~ 35rpm, then with running water flushing 3 ~ 5 times, with washed with de-ionized water at least 2 times, gas cylinder is placed 80 ℃ of baking ovens and dries up simultaneously rear airtight with pure nitrogen gas again.
3. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 1 is characterized in that, described step B comprises: the gas cylinder that keeps dry is connected upper ozone generator, and the control ozone concentration is 30 ~ 100mg/m 3, flow is 0.5 ~ 2L/min, continues ventilation 10 ~ 20min, makes gas cylinder inner surface adsorption activity point inactivation, then passes into dried compressed air and removes residual ozone.
4. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 1, it is characterized in that, described step C comprises: select and the aluminium alloy silane coupler of compatibility mutually, utilize spray equipment that silane coupler is sprayed into inner surface of container, coating thickness 1 ~ 5 μ m.
5. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 1 is characterized in that, described step D comprises teos hydrolysis, polycondensation, spraying and four steps of curing, and ethyl orthosilicate and absolute ethyl alcohol are pressed the 1:9 mixed dissolution; Then add oxalic acid aqueous solution prehydrolysis, control PH=3 ± 0.5 is preferably 2.8 ~ 3.5, and prehydrolysis time 2h ~ 3h obtains teos hydrolysis solution; With said hydrolyzed solution, slowly add 2% ammoniacal liquor, regulate between PH to 8 ~ 11, polycondensation process occurs; Solution sprays or showering immediately after the polycondensation, is being no more than ventilation freeze-day with constant temperature 8 ~ 12h under 60 ℃ of temperature immediately after finishing, and the control thickness is at 10 ~ 30 μ m.
6. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 1 is characterized in that, described step e comprises:
Spraying seal coat: seal coat, normal temperature solidifying fluorine carbon resin special curing agent, diluent are stirred according to the ratio of 10:1:4, spray to the gas cylinder inwall, obtain the seal coat layer of thickness 10 μ m, surface drying 5 ~ 10min;
Finish paint spraying: fluorocarbon resin and normal temperature solidifying fluorine carbon resin special curing agent, diluent according to 10:1:4 ratio mixing and stirring, sprays three times to the pressure vessel inner surface, descend to toast 30 ~ 60min in 60 ~ 90 ℃.
7. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 4 is characterized in that, described silane coupler is the silane coupler that contains amino or acrylic.
8. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 4, it is characterized in that, adopt repeatedly spraying during the spraying silane coupler, after each spraying gas cylinder is transferred to baker, passing under dried compressed air or the nitrogen state, under 40 ~ 60 ℃ of temperature, toast at least 20min.
9. the interior wall processing technology of aluminium alloy pressure cylinder according to claim 6 is characterized in that, described seal coat is the seal coat of acrylic resin type, and described fluorocarbon resin is the fluorocarbon resin of fluoroolefins-ethene multiple copolymer type.
10. spray equipment that is used for the interior wall processing technology of above-mentioned aluminium alloy pressure cylinder, it is characterized in that, comprise air compressor, spray gun, pedestal and deck, gas cylinder is fixed by the deck that is positioned on the pedestal, and described air compressor provides feed power, atomizing source of the gas and switch control gas for spray gun; Described spray gun is installed on the pedestal by the spray gun vertical movement mechanism, and with the stock atomising head, can stretch into to carry out inwall in the gas cylinder and spray.
CN201210489083.6A 2012-11-26 2012-11-26 The interior wall processing technology of aluminium alloy pressure cylinder and treating apparatus Expired - Fee Related CN103008216B (en)

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CN104226567A (en) * 2014-09-26 2014-12-24 中国电子科技集团公司第五十四研究所 Coating method of ultraviolet-resistant bright transparent composite coating
CN105797938A (en) * 2014-12-31 2016-07-27 石家庄安瑞科气体机械有限公司 Forming method of anticorrosive coating for inner wall of gas cylinder with two sealed ends
CN113122833A (en) * 2021-04-11 2021-07-16 常龙 Aluminum alloy passivation method
CN113786974A (en) * 2018-09-16 2021-12-14 浙江博瑞电子科技有限公司 Inner wall treatment method for high-purity special gas packaging material and packaging material for high-purity special gas
CN114321698A (en) * 2021-12-30 2022-04-12 大连科利德光电子材料有限公司 Steel cylinder for storing electronic-grade nitric oxide and machining method thereof
CN115354309A (en) * 2022-07-29 2022-11-18 四川中测标物科技有限公司 Method for treating inner surface of aluminum alloy gas cylinder and aluminum alloy gas cylinder

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104226567A (en) * 2014-09-26 2014-12-24 中国电子科技集团公司第五十四研究所 Coating method of ultraviolet-resistant bright transparent composite coating
CN105797938A (en) * 2014-12-31 2016-07-27 石家庄安瑞科气体机械有限公司 Forming method of anticorrosive coating for inner wall of gas cylinder with two sealed ends
CN113786974A (en) * 2018-09-16 2021-12-14 浙江博瑞电子科技有限公司 Inner wall treatment method for high-purity special gas packaging material and packaging material for high-purity special gas
CN113122833A (en) * 2021-04-11 2021-07-16 常龙 Aluminum alloy passivation method
CN113122833B (en) * 2021-04-11 2022-07-15 宁波奋达新能源科技有限公司 Aluminum alloy passivation method
CN114321698A (en) * 2021-12-30 2022-04-12 大连科利德光电子材料有限公司 Steel cylinder for storing electronic-grade nitric oxide and machining method thereof
WO2023123595A1 (en) * 2021-12-30 2023-07-06 大连科利德光电子材料有限公司 Steel cylinder for storing electronic-grade nitric oxide and processing method therefor
CN115354309A (en) * 2022-07-29 2022-11-18 四川中测标物科技有限公司 Method for treating inner surface of aluminum alloy gas cylinder and aluminum alloy gas cylinder
CN115354309B (en) * 2022-07-29 2023-10-31 四川中测标物科技有限公司 Method for treating inner surface of aluminum alloy gas cylinder and aluminum alloy gas cylinder

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