CN102133569A - Anti-corrosion paint coating method of aluminum alloy piece for power station - Google Patents
Anti-corrosion paint coating method of aluminum alloy piece for power station Download PDFInfo
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- CN102133569A CN102133569A CN2011100769138A CN201110076913A CN102133569A CN 102133569 A CN102133569 A CN 102133569A CN 2011100769138 A CN2011100769138 A CN 2011100769138A CN 201110076913 A CN201110076913 A CN 201110076913A CN 102133569 A CN102133569 A CN 102133569A
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Abstract
An anti-corrosion paint coating method of an aluminum alloy piece for a power station comprises the following steps: dipping an aluminum alloy piece into degreasing solution prepared by a surface active agent and water to degrease for 1-1.5 hours; then dipping the aluminum alloy piece in a cleaning water pond for cleaning for 3-5 minutes; after the cleaning, dipping the aluminum alloy piece in passivation solution prepared by oxalic acid, glacial acetic acid and water for 1.5-2 hours; then dipping the aluminum alloy piece into another clean water pond for cleaning for 3-5 minutes; after the cleaning, taking out and drying the aluminum alloy piece, and spraying anti-corrosion paint on the aluminum alloy piece; after the paint spraying, putting the aluminum alloy piece into a drying room, and drying the aluminum alloy piece by introducing the temperature being 90-100 DEG C for 1-1.5 hours; and after the drying, taking out the aluminum alloy piece, grinding and cleaning the surface of the aluminum alloy piece, thus completing the coating of the anti-corrosion paint on the aluminum alloy piece. By utilizing the air introducing method at the bottom of a processing pond, the degreasing process and surface passivating process can be accelerated, and the production efficiency is improved by more than 30%; and the anti-corrosion layer can be dried uniformly by the temperature being 90-100 DEG C, so that stronger adhering force in the drying process of the anti-corrosion layer can be guaranteed, and the service life of the anti-corrosion layer can be prolonged effectively.
Description
Technical field
The present invention relates to a kind of Al-alloy parts overcoat coating process, specifically a kind of power station corrosion resistant coating coating process of Al-alloy parts.
Background technology
In inner high voltage electricity in power station is carried, use Al-alloy parts such as aluminium alloy tube usually, be corroded, improve service life, generally need form anticorrosive coat at Al-alloy parts surface anticorrosion with painting lacquer in order to prevent Al-alloy parts.The quality of corrosion resistant coating spraying coating process directly influences the adhesion effect and the life-span of anticorrosive coat.Can also carry out Passivation Treatment to the Al-alloy parts surface before spraying corrosion resistant coating, prior art adopts salpeter solution to carry out Passivation Treatment, pollutes greatly, and needs to heat the energy consumption height in the processing procedure.
Summary of the invention
Technical problem to be solved by this invention provides the corrosion resistant coating coating process of a kind of power station with Al-alloy parts, adhesion effect and the life-span that can improve anticorrosive coat.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: the power station corrosion resistant coating coating process of Al-alloy parts, and the application step is:
(1), in the ungrease treatment pond, be hybridly prepared into degreasant solution with surfactant and water, the consumption of surfactant is 1-2 grams in every liter of degreasant solution, adds alkaline reagent in the degreasant solution of preparation the pH value is adjusted to 7-8, and is standby;
(2), in the Passivation Treatment pond, be hybridly prepared into passivating solution with oxalic acid, glacial acetic acid and water, the percentage by weight of each composition consumption is oxalic acid 1-4%, glacial acetic acid 1-4%, water 94-96%, preparation is standby after finishing;
(3), Al-alloy parts is immersed in the degreasant solution of step (1), in the process of soaking, by pipeline uninterrupted gas that feeds in the pond of bottom, ungrease treatment pond, throughput makes the degreasant solution surface dig spray, soaks and takes out Al-alloy parts after 1-1.5 hours;
(4), will put into clear water reserviors through the Al-alloy parts that degreasant solution soaks and clean, by pipeline uninterrupted gas that feeds in the pond of clear water reserviors bottom, clean and take out Al-alloy parts after 3-5 minutes in the process of cleaning;
(5), the Al-alloy parts after will cleaning immerses in the passivating solution of step (2), carrying out surface passivation handles, in the process of Passivation Treatment, by pipeline uninterrupted gas that feeds in the pond of bottom, Passivation Treatment pond, Passivation Treatment is taken out Al-alloy parts after 1.5-2 hours;
(6), will immerse in another clear water reserviors through the Al-alloy parts of step (5) Passivation Treatment and clean, by pipeline uninterrupted gas that feeds in the pond of clear water reserviors bottoms, cleans after 3-5 minutes in the process of cleaning, with the Al-alloy parts taking-up and dry;
(7), earlier cover layer protecting film at the position that Al-alloy parts does not need to spray paint, even spraying one deck corrosion resistant coating on the Al-alloy parts surface then, coating thickness is 50-160 microns;
(8), the Al-alloy parts after will spraying paint puts into baking room, evenly feeds 90-100 ℃ high temperature gas flow to the heat exchanger of baking room bottom, and Al-alloy parts is dried, and dry taking-up after 1-1.5 hours;
(9), with sand paper to the cleaning of polishing of Al-alloy parts surface, make the Al-alloy parts surfacing, promptly finish the application of Al-alloy parts corrosion resistant coating.
The invention has the beneficial effects as follows: the alkaline solution that adopts surfactant can reduce the cost of degreasing as degreasant solution, utilizes the method for treatment pond bottom ventilation to quicken skimming processes and surface passivation process, enhances productivity more than 30%.The anticorrosive coat that Al-alloy parts Passivation Treatment and the spraying of dry back are 50-160 microns, temperature with 90-100 ℃ is evenly dried anticorrosive coat, guaranteeing has stronger adhesive force with the Al-alloy parts surface all the time in the anticorrosive coat dry run, effectively improve the life-span of anticorrosive coat, the anticorrosive coat of condition of equivalent thickness is compared service life with spraying coating process in the past and is improved more than 10%.
Description of drawings
Fig. 1 is the set-up mode schematic diagram of treatment pond of the present invention bottom breather line.
Mark among the figure: 1, treatment pond, 2, breather line, 3, the gas outlet.
The specific embodiment
The power station corrosion resistant coating coating process of Al-alloy parts, the application step is:
(1), in the ungrease treatment pond, be hybridly prepared into degreasant solution with surfactant and water, the consumption of surfactant is 1-2 grams in every liter of degreasant solution, adds alkaline reagent in the degreasant solution of preparation the pH value is adjusted to 7-8, and is standby;
(2), in the Passivation Treatment pond, be hybridly prepared into passivating solution with oxalic acid, glacial acetic acid and water, the percentage by weight of each composition consumption is oxalic acid 1-4%, glacial acetic acid 1-4%, water 94-96%, preparation is standby after finishing;
(3), Al-alloy parts is immersed in the degreasant solution of step (1), in the process of soaking, by pipeline uninterrupted gas that feeds in the pond of bottom, ungrease treatment pond, spray is dug on throughput assurance degreasant solution surface, soaks and takes out Al-alloy parts after 1-1.5 hours;
(4), will put into clear water reserviors through the Al-alloy parts that degreasant solution soaks cleans, pipeline by the clear water reserviors bottom in the process of cleaning uninterruptedly feeds gas in the pond, throughput guarantees that the water surface digs spray, cleans and takes out Al-alloy parts after 3-5 minutes;
(5), the Al-alloy parts after will cleaning immerses in the passivating solution of step (2), carrying out surface passivation handles, in the process of Passivation Treatment, pipeline uninterrupted gas that feeds in the pond by bottom, Passivation Treatment pond, spray is dug on throughput assurance passivating solution surface, and Passivation Treatment is taken out Al-alloy parts after 1.5-2 hours;
(6), will immerse in another clear water reserviors through the Al-alloy parts of step (5) Passivation Treatment and clean, pipeline by the clear water reserviors bottom in the process of cleaning uninterruptedly feeds gas in the pond, throughput guarantees that the water surface digs spray, clean after 3-5 minutes, Al-alloy parts is taken out and dry;
(7), earlier cover layer protecting film at the position that Al-alloy parts does not need to spray paint, even spraying one deck corrosion resistant coating on the Al-alloy parts surface then, coating thickness is 50-160 microns;
(8), the Al-alloy parts after will spraying paint puts into baking room, evenly feeds 90-100 ℃ high temperature gas flow to the heat exchanger of baking room bottom, and Al-alloy parts is dried, and dry taking-up after 1-1.5 hours;
(9), with sand paper to the cleaning of polishing of Al-alloy parts surface, make the Al-alloy parts surfacing, promptly finish the application of Al-alloy parts corrosion resistant coating.
In technical scheme of the present invention, surfactant can adopt conventional commercial surfactant, as op emulsion, peregal, sea-gull washing agent, dye leveller, diglycollic amide (6501), glycerin monostearate.
The alkaline reagent of regulating degreasant solution pH value can adopt common agents such as NaOH, sodium carbonate or ammoniacal liquor, also can adopt other not influence the alkaline reagent of surfactant normal function.
In ungrease treatment of the present invention pond, clear water reserviors are identical with the Passivation Treatment pool structure.Be provided with breather line 2 on the axis of treatment pond 1 bottom, the gas outlet 3 on the breather line 2 is provided with one every 1-1.5 meters, and the setting of gas output is as the criterion can guarantee that liquid surface is dug spray as the water boiling in the treatment pond 1.The gas that feeds adopts air to get final product.By method in the ventilation of treatment pond bottom, can quicken liquid the flowing around Al-alloy parts in the treatment pond, constantly there is new liquid to contact, thereby quickens processing procedure with the Al-alloy parts surface, can make processing speed improve more than 30%.After using this method, in the Passivation Treatment process of Al-alloy parts, do not need passivating solution is heated, do not need in passivating solution, to add nitric acid yet, only use the Passivation Treatment of finishing of cost-effective rate that the mixed solution of oxalic acid, glacial acetic acid and water in this method promptly can be cheap.
When the Al-alloy parts surface lacquer, in order to protect the position that need not spray paint, need carry out environmental sealing to this position, can adopt usual manner to seal, for example cover modes such as oilpaper, plastic sheeting.
Sprayed in the process that anticorrosion enamelled coating dries at Al-alloy parts, should avoid heat to concentrate, prevented that each position drying that anticorrosion enamelled coating local heating inequality causes is asynchronous, influenced adhering to of anticorrosive coat.In the technical program, in the baking room bottom heat exchanger is set, be similar to the form of radiator.High-temperature gas is fed heat exchanger, it is dried around thermal current being risen gradually be evenly distributed on Al-alloy parts, the inequality of being heated of having avoided heater such as direct employing heating wire that heating around the Al-alloy parts is caused, thus improved drying effect.In when oven dry, the too high meeting of temperature causes anticorrosive coat adhesive force to descend, and reduces the life-span of anticorrosive coat, when serious even can cause the anticorrosive coat peeling, reduces product percent of pass.When oven dry, temperature is crossed low meeting and is reduced drying efficiency, strengthens the production cycle, is unfavorable for enterprise production and management.The hot-gas temperature that therefore will be used to dry be arranged on 90-100 ℃ proper, be arranged on 95-98 ℃ the most suitable.
In addition, in the power station, use safely, before carrying out ungrease treatment, elder generation that the wedge angle and the burr on Al-alloy parts surface are polished flat in order to guarantee Al-alloy parts.
Embodiment 1
The power station coating process of Al-alloy parts corrosion resistant coating, the application step is:
(1), in the ungrease treatment pond with surfactant and water mixed preparing degreasant solution, the consumption of surfactant is 1 gram in every liter of degreasant solution, all the other be water, prepare afterwards with NaOH the pH value of degreasant solution is adjusted to 8, and are standby;
(2), in the Passivation Treatment pond with oxalic acid, glacial acetic acid and water mixed preparing passivating solution, the percentage by weight of each composition consumption is oxalic acid 1%, glacial acetic acid 4%, water 95%, and is standby after preparation is finished;
(3), Al-alloy parts is immersed in the degreasant solution in the ungrease treatment pond, carry out ungrease treatment, when handling, to the uninterrupted gas that feeds in bottom, ungrease treatment pond solution surface is seethed by breather line, the soak time of Al-alloy parts ungrease treatment is 1.5 hours;
(4), will immerse in the clear water reserviors through the Al-alloy parts that degreasant solution soaks, cleaned 3 minutes, during cleaning the clear water reserviors bottom constantly feeding gas water surface is seethed;
(5), the Al-alloy parts after will cleaning immerses in the passivating solution in the Passivation Treatment pond, carries out surface passivation and handles, and to the continuous feeding in bottom, Passivation Treatment pond gas the passivating solution surface seethed with pipeline in the time of processing, soak time is 1.5 hours;
(6), will immerse through the Al-alloy parts of Passivation Treatment in another clear water reserviors, cleaned 3 minutes, clear water reserviors bottoms constantly feeds gas water surface is seethed during cleaning, cleans the back and takes out and dry;
(7), earlier cover layer protecting film, to the even anticorrosion with painting lacquer of Al-alloy parts, coating thickness is 50 microns then at the position that Al-alloy parts does not need to spray paint;
(8), Al-alloy parts puts into baking room after spraying paint and finishing, and evenly feeds 90 ℃ high temperature gas flow to the heat exchanger of baking room bottom, to Al-alloy parts oven dry 1 hour, took out the oven dry back;
(9), the Al-alloy parts after the oven dry, with sand papering cleaning surface, promptly finish the application of Al-alloy parts corrosion resistant coating.
Embodiment 2
The power station coating process of Al-alloy parts corrosion resistant coating, the application step is:
(1), in the ungrease treatment pond with surfactant and water mixed preparing degreasant solution, the consumption of surfactant is 2 grams in every liter of degreasant solution, all the other be water, prepare afterwards with sodium carbonate the pH value of degreasant solution is adjusted to 7, and are standby;
(2), in the Passivation Treatment pond with oxalic acid, glacial acetic acid and water mixed preparing passivating solution, the percentage by weight of each composition consumption is oxalic acid 4%, glacial acetic acid 2%, water 94%, and is standby after preparation is finished;
(3), Al-alloy parts immersed in the degreasant solution in the ungrease treatment pond carries out ungrease treatment, constantly feed gas to bottom, ungrease treatment pond in the time of processing solution surface seethed, the soak time of Al-alloy parts ungrease treatment is 1 hour;
(4), will immerse in the clear water reserviors through the Al-alloy parts that degreasant solution soaks and clean 5 minutes, the clear water reserviors bottom constantly feeds gas water surface is seethed during cleaning;
(5), the Al-alloy parts after will cleaning immerses and carries out surface passivation in the passivating solution in the Passivation Treatment pond and handle, in the time of processing to bottom, Passivation Treatment pond constantly feeding gas the passivating solution surface is seethed, soak time is 1.8 hours;
(6), will immerse through the Al-alloy parts of Passivation Treatment in another clear water reserviors and to clean 5 minutes, the clear water reserviors bottom constantly feeds gas water surface is seethed during cleaning, cleans the back and takes out and dry;
(7), earlier cover layer protecting film, to the even anticorrosion with painting lacquer of Al-alloy parts, coating thickness is 100 microns then at the position that Al-alloy parts does not need to spray paint;
(8), Al-alloy parts puts into baking room after spraying paint and finishing, and evenly feeds 98 ℃ high temperature gas flow to the heat exchanger of baking room bottom, to Al-alloy parts oven dry 1.2 hours;
(9), the Al-alloy parts after will drying takes out, and with sand papering cleaning Al-alloy parts surface, promptly finishes the application of Al-alloy parts corrosion resistant coating.
Embodiment 3
The power station coating process of Al-alloy parts corrosion resistant coating, the application step is:
(1), in the ungrease treatment pond with surfactant and water mixed preparing degreasant solution, the consumption of surfactant is 1.5 grams in every liter of degreasant solution, all the other be water, prepare afterwards with ammoniacal liquor the pH value of degreasant solution is adjusted to 7, and are standby;
(2), in the Passivation Treatment pond with oxalic acid, glacial acetic acid and water mixed preparing passivating solution, the percentage by weight of each composition consumption is oxalic acid 3%, glacial acetic acid 1%, water 96%, and is standby after preparation is finished;
(3), Al-alloy parts immersed in the degreasant solution in the ungrease treatment pond carries out ungrease treatment, constantly feed gas to bottom, ungrease treatment pond in the time of processing solution surface seethed, the soak time of Al-alloy parts ungrease treatment is 1.2 hours;
(4), will immerse in the clear water reserviors through the Al-alloy parts that degreasant solution soaks and clean 4 minutes, the clear water reserviors bottom constantly feeds gas water surface is seethed during cleaning;
(5), the Al-alloy parts after will cleaning immerses and carries out surface passivation in the passivating solution in the Passivation Treatment pond and handle, and to the continuous feeding in bottom, Passivation Treatment pond gas the passivating solution surface seethed with pipeline in the time of processing, soak time is 2 hours;
(6), will immerse through the Al-alloy parts of Passivation Treatment in another clear water reserviors and to clean 4 minutes, the clear water reserviors bottom constantly feeds gas water surface is seethed during cleaning, cleans the back and takes out and dry;
(7), earlier cover layer protecting film, to the even anticorrosion with painting lacquer of Al-alloy parts, coating thickness is 160 microns then at the position that Al-alloy parts does not need to spray paint;
(8), Al-alloy parts puts into baking room after spraying paint and finishing, and evenly feeds 100 ℃ high temperature gas flow to the heat exchanger of baking room bottom, to Al-alloy parts oven dry 1.5 hours;
(9), the Al-alloy parts after will drying takes out, and with sand papering cleaning Al-alloy parts surface, promptly finishes the application of Al-alloy parts corrosion resistant coating.
According to the method for the embodiment of the invention, the anticorrosive coat that sprays 50 micron thickness can reach more than 12 years service life.The anticorrosive coat that sprays 90 micron thickness can reach more than 18 years service life.The anticorrosive coat that sprays 160 micron thickness can reach more than 25 years service life.
Claims (1)
1. the power station is with the corrosion resistant coating coating process of Al-alloy parts, and it is characterized in that: the application step is:
(1), in the ungrease treatment pond, be hybridly prepared into degreasant solution with surfactant and water, the consumption of surfactant is 1-2 grams in every liter of degreasant solution, adds alkaline reagent in the degreasant solution of preparation the pH value is adjusted to 7-8, and is standby;
(2), in the Passivation Treatment pond, be hybridly prepared into passivating solution with oxalic acid, glacial acetic acid and water, the percentage by weight of each composition consumption is oxalic acid 1-4%, glacial acetic acid 1-4%, water 94-96%, preparation is standby after finishing;
(3), Al-alloy parts is immersed in the degreasant solution of step (1), in the process of soaking, by pipeline uninterrupted gas that feeds in the pond of bottom, ungrease treatment pond, throughput makes the degreasant solution surface dig spray, soaks and takes out Al-alloy parts after 1-1.5 hours;
(4), will put into clear water reserviors through the Al-alloy parts that degreasant solution soaks and clean, by pipeline uninterrupted gas that feeds in the pond of clear water reserviors bottom, clean and take out Al-alloy parts after 3-5 minutes in the process of cleaning;
(5), the Al-alloy parts after will cleaning immerses in the passivating solution of step (2), carrying out surface passivation handles, in the process of Passivation Treatment, by pipeline uninterrupted gas that feeds in the pond of bottom, Passivation Treatment pond, Passivation Treatment is taken out Al-alloy parts after 1.5-2 hours;
(6), will immerse in another clear water reserviors through the Al-alloy parts of step (5) Passivation Treatment and clean, by pipeline uninterrupted gas that feeds in the pond of clear water reserviors bottoms, cleans after 3-5 minutes in the process of cleaning, with the Al-alloy parts taking-up and dry;
(7), earlier cover layer protecting film at the position that Al-alloy parts does not need to spray paint, even spraying one deck corrosion resistant coating on the Al-alloy parts surface then, coating thickness is 50-160 microns;
(8), the Al-alloy parts after will spraying paint puts into baking room, evenly feeds 90-100 ℃ high temperature gas flow to the heat exchanger of baking room bottom, and Al-alloy parts is dried, and dry taking-up after 1-1.5 hours;
(9), with sand paper to the cleaning of polishing of Al-alloy parts surface, make the Al-alloy parts surfacing, promptly finish the application of Al-alloy parts corrosion resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110076913 CN102133569B (en) | 2011-03-29 | 2011-03-29 | Anti-corrosion paint coating method of aluminum alloy piece for power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110076913 CN102133569B (en) | 2011-03-29 | 2011-03-29 | Anti-corrosion paint coating method of aluminum alloy piece for power station |
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| CN102133569A true CN102133569A (en) | 2011-07-27 |
| CN102133569B CN102133569B (en) | 2013-09-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269343A (en) * | 2018-09-03 | 2019-01-25 | 成都长江锅炉热能设备制造有限公司 | The indissoluble dirt cleaning method of air cooler heat exchange pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4120996A (en) * | 1977-05-23 | 1978-10-17 | Ppg Industries, Inc. | Method of providing corrosion resistance to metal surfaces |
| CN1125786A (en) * | 1994-12-26 | 1996-07-03 | 邓志强 | Surface processing method of high-hardness aluminum or aluminum alloy tack-free pot |
| WO2001031084A1 (en) * | 1999-10-25 | 2001-05-03 | Altitech Ab | Method and means for corrosion preventive surface treatment of metals |
| CN1865499A (en) * | 2006-06-08 | 2006-11-22 | 华侨大学 | Process for preparation of anti-corrosion chemical plating of steel |
| CN101869884A (en) * | 2009-04-22 | 2010-10-27 | 招远市天星塑料制品厂 | Processing process before spraying molding of aluminum alloy elements |
-
2011
- 2011-03-29 CN CN 201110076913 patent/CN102133569B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4120996A (en) * | 1977-05-23 | 1978-10-17 | Ppg Industries, Inc. | Method of providing corrosion resistance to metal surfaces |
| CN1125786A (en) * | 1994-12-26 | 1996-07-03 | 邓志强 | Surface processing method of high-hardness aluminum or aluminum alloy tack-free pot |
| WO2001031084A1 (en) * | 1999-10-25 | 2001-05-03 | Altitech Ab | Method and means for corrosion preventive surface treatment of metals |
| CN1865499A (en) * | 2006-06-08 | 2006-11-22 | 华侨大学 | Process for preparation of anti-corrosion chemical plating of steel |
| CN101869884A (en) * | 2009-04-22 | 2010-10-27 | 招远市天星塑料制品厂 | Processing process before spraying molding of aluminum alloy elements |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269343A (en) * | 2018-09-03 | 2019-01-25 | 成都长江锅炉热能设备制造有限公司 | The indissoluble dirt cleaning method of air cooler heat exchange pipe |
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