JP2007196133A - Coating method for aluminum heat exchangers manufactured by brazing with flux - Google Patents
Coating method for aluminum heat exchangers manufactured by brazing with flux Download PDFInfo
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- JP2007196133A JP2007196133A JP2006017567A JP2006017567A JP2007196133A JP 2007196133 A JP2007196133 A JP 2007196133A JP 2006017567 A JP2006017567 A JP 2006017567A JP 2006017567 A JP2006017567 A JP 2006017567A JP 2007196133 A JP2007196133 A JP 2007196133A
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- heat exchanger
- flux
- brazing
- manufactured
- paint
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- 230000004907 flux Effects 0.000 title claims abstract description 37
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- 238000005219 brazing Methods 0.000 title claims abstract description 25
- 238000000576 coating method Methods 0.000 title abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000003973 paint Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011162 core material Substances 0.000 claims abstract description 13
- 239000008199 coating composition Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 13
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000005422 blasting Methods 0.000 abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052804 chromium Inorganic materials 0.000 abstract description 4
- 239000011651 chromium Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000005183 environmental health Effects 0.000 abstract description 2
- 238000010422 painting Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 238000013020 steam cleaning Methods 0.000 description 5
- 229910018125 Al-Si Inorganic materials 0.000 description 4
- 229910018520 Al—Si Inorganic materials 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 4
- 239000004640 Melamine resin Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000005488 sandblasting Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- -1 drying Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
【課題】フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器の塗装において、クロム含有液による処理工程を必要とせず、環境衛生上問題がない方法で熱交換器への塗料の密着性を向上させることができる塗装方法を提供すること。
【解決手段】フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器の少なくともフラックスの塗布された部分のアルミニウム材の表面にブラスト処理を施し、温度８０〜１５０℃のスチームを吹きつけて洗浄を行い、続いて水洗し、乾燥した後、粉体塗料組成物以外の塗料組成物を塗装する、フラックス併用ろう付けにより製造されたアルミニウム材製熱交換器の塗装方法。
【選択図】 なし
An object of the present invention is to provide a coating of a heat exchanger manufactured from an aluminum tube core material and fins by brazing using a flux together with a method that does not require a treatment step with a chromium-containing liquid and has no environmental health problems. To provide a coating method capable of improving the adhesion of a paint to a heat exchanger.
A heat exchanger manufactured from an aluminum tube core material and fins by brazing together with a flux is subjected to blasting on the surface of the aluminum material at least in a portion where the flux is applied, and a temperature of 80 to A heat exchanger made of aluminum material manufactured by brazing with a flux, in which steam is sprayed at 150 ° C., then washed with water, dried, and then coated with a coating composition other than the powder coating composition. How to paint.
[Selection figure] None
Description
本発明は、フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器の塗装方法に関する。なお、本発明においては、アルミニウム及びアルミニウム合金を総称して単にアルミニウム材と記載する。 The present invention relates to a coating method for a heat exchanger manufactured from an aluminum tube core and fins by brazing using a flux together. In the present invention, aluminum and an aluminum alloy are collectively referred to as an aluminum material.
熱交換器は、熱伝導性、軽量性等の観点からアルミニウム材、特にアルミニウム合金材で形成されることが多い。従来から、アルミニウム材製熱交換器は各構成部材同士をろう材により接合させることにより製造している（例えば、特許文献１及び２参照。）。しかしながら、押出または圧延加工されたアルミニウム材の表面には酸化皮膜が存在するので、健全なろう付け状態を得るためにはフラックスを併用することが必要不可欠であった。このフラックスとして塩化物系フラックスやフッ化物系フラックスが用いられるが、現在では、ろう付け後の洗浄工程が不要で且つ装置コストの安いフッ化物系フラックスを使用した窒素雰囲気ろう付け法が主流となっている。 The heat exchanger is often formed of an aluminum material, particularly an aluminum alloy material, from the viewpoints of thermal conductivity, lightness, and the like. Conventionally, an aluminum material heat exchanger is manufactured by joining constituent members to each other with a brazing material (see, for example, Patent Documents 1 and 2). However, since an oxide film exists on the surface of the extruded or rolled aluminum material, it is indispensable to use a flux together in order to obtain a sound brazed state. As this flux, chloride flux and fluoride flux are used, but at present, the nitrogen atmosphere brazing method using fluoride flux, which does not require a cleaning process after brazing and has low equipment costs, has become the mainstream. ing.
近年、これらの熱交換器は、自動車のみならず、オートバイにも使用範囲が広まり、アルミニウム材の色彩ではなく、所望の色彩に塗装することが望まれてきている。しかし、上記のようにフラックスを併用したろう付けにより製造された熱交換器を塗装しようとしてもそのままでは塗料の付きが悪い。フラックスを併用したろう付けにより製造された熱交換器への塗料の塗着性を改善する方法として、ブラスト処理後、クロメート処理等を施して熱交換器への塗料の密着性を向上させる方法はあるが、クロム含有液による処理工程を実施しなければならないので、環境衛生上問題があり、作業者の安全性について大きな問題となっていた。 In recent years, these heat exchangers have been used not only for automobiles but also for motorcycles, and it has been desired that these heat exchangers be painted in a desired color, not an aluminum material. However, even if it is going to paint the heat exchanger manufactured by brazing which used the flux together as mentioned above, the adhesion of a paint is bad as it is. As a method to improve the coating property of the paint to the heat exchanger manufactured by brazing using flux together, the method of improving the adhesion of the paint to the heat exchanger by applying chromate treatment after blasting is However, since the treatment process with the chromium-containing liquid has to be carried out, there is a problem in terms of environmental hygiene, which has been a big problem regarding the safety of workers.
本発明は、フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器の塗装において、クロム含有液による処理工程を必要とせず、環境衛生上問題がない方法で熱交換器への塗料の密着性を向上させることができる塗装方法を提供することを目的としている。 The present invention is a method that does not require a treatment step with a chromium-containing liquid in coating of a heat exchanger manufactured from an aluminum tube core material and fins by brazing together with a flux, and has no environmental health problem. An object of the present invention is to provide a coating method capable of improving the adhesion of the paint to the heat exchanger.
本発明者らは、上記の目的を達成するために鋭意検討の結果、フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器の少なくともフラックスの塗布された部分のアルミニウム材の表面にブラスト処理を施し、スチーム洗浄を行うことにより、その後の塗装工程において熱交換器への塗料の密着性を向上させることができることを見出し、本発明を完成した。 As a result of intensive studies to achieve the above object, the present inventors applied at least a flux of a heat exchanger manufactured from a tube core material made of aluminum and fins by brazing together with a flux. It was found that the adhesion of the paint to the heat exchanger can be improved in the subsequent coating process by performing blasting on the surface of the aluminum material and performing steam cleaning, and the present invention has been completed.
即ち、本発明のフラックス併用ろう付けにより製造されたアルミニウム材製熱交換器の塗装方法は、フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器の少なくともフラックスの塗布された部分のアルミニウム材の表面にブラスト処理を施し、温度８０〜１５０℃のスチームを吹きつけて洗浄を行い、続いて水洗し、乾燥した後、粉体塗料組成物以外の塗料組成物を塗装することを特徴とする。 That is, the coating method of the aluminum material heat exchanger manufactured by the flux combined brazing of the present invention is at least a heat exchanger manufactured from the tube core material made of aluminum material and the fin by brazing using the flux together. Blast treatment is applied to the surface of the aluminum material where the flux is applied, and steam is sprayed at a temperature of 80 to 150 ° C., followed by washing with water and drying, followed by coating compositions other than the powder coating composition It is characterized by painting things.
本発明のフラックス併用ろう付けにより製造されたアルミニウム材製熱交換器の塗装方法においては、クロム含有液による処理工程を必要とせず、環境衛生上問題がない方法で熱交換器への塗料の密着性を向上させることができる。 In the coating method of the aluminum heat exchanger manufactured by the flux combined brazing according to the present invention, the treatment process with the chromium-containing liquid is not required, and the paint adheres to the heat exchanger in a manner that is free from environmental hygiene problems. Can be improved.
本発明の塗装方法は、フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器の少なくともフラックスの塗布された部分のアルミニウム材の表面にブラスト処理を施し、温度８０〜１５０℃のスチームを吹きつけて洗浄を行い、続いて水洗し、乾燥した後、粉体塗料組成物以外の塗料組成物を塗装することを特徴とするフラックス併用ろう付けにより製造されたアルミニウム材製熱交換器の塗装方法であり、本発明の塗装方法で塗装する「フラックスを併用したろう付けによりアルミニウム材製のチューブ芯材とフィンとから製造された熱交換器」は従来周知の種々の方法、例えば前記した特許文献１や特許文献２に記載の方法で製造することができる。 In the coating method of the present invention, the surface of the aluminum material on which at least the flux is applied of the heat exchanger manufactured from the tube core material made of aluminum material and the fins is subjected to blasting by brazing together with the flux, It was manufactured by spraying steam at a temperature of 80 to 150 ° C., followed by washing with water, drying, and coating with a coating composition other than the powder coating composition. This is a coating method for an aluminum material heat exchanger, and “a heat exchanger manufactured from a tube core material made of an aluminum material and fins by brazing using a flux”, which is applied by the coating method of the present invention, is well known in the art. It can be manufactured by various methods, for example, the methods described in Patent Document 1 and Patent Document 2 described above.
本発明で採用できるブラスト処理は遠心投射式、エアー加速式、水噴射式等の何れでもよい。また、使用する研磨材の種類、形状及びたたきつける圧力については熱交換器のアルミニウム材に悪影響を与えないように適切に選択する必要があるが、このような選択は当業者には自明の事項である。 The blasting process that can be employed in the present invention may be any of a centrifugal projection type, an air acceleration type, a water jet type, and the like. In addition, the type, shape, and pressure of the abrasive used must be appropriately selected so as not to adversely affect the aluminum material of the heat exchanger. Such selection is obvious to those skilled in the art. is there.
本発明においてブラスト処理を施す部分は、塗料の密着性を向上させるために、熱交換器の少なくともフラックスの塗布された部分である。本発明においては、熱交換器のフラックスの塗布された部分及びその周辺部をブラスト処理することが好ましいが、熱交換器の表面全体がブラスト処理されても問題はなく、塗料の密着性を向上させるためには熱交換器の表面全体をブラスト処理することが好ましい場合もある。 In the present invention, the portion subjected to the blast treatment is a portion of the heat exchanger to which at least flux is applied in order to improve the adhesion of the paint. In the present invention, it is preferable to blast the flux-applied part of the heat exchanger and its peripheral part, but there is no problem even if the entire surface of the heat exchanger is blasted and the adhesion of the paint is improved. In some cases, it may be preferable to blast the entire surface of the heat exchanger.
本発明においてはスチーム洗浄によって完全に洗浄しようとするものではなく、スチーム洗浄によってフラックス、酸化物などを浮かし、後の水洗によって完全に洗浄することを意図している。本発明において、スチーム温度はスチームが熱交換器と接触する部分での温度であり、この部分での温度が８０℃未満であると浮かし効果、洗浄効果が少なく、また、１５０℃を超えてもそれに見合った効果が得られないので不経済である。本発明においてはスチーム洗浄はフラックス、酸化物などを浮かすことを目的にしているので、スチーム洗浄時間は特には限定されないが、一般的には１０秒以下、普通には数秒程度で十分である。 In the present invention, it is not intended to be completely cleaned by steam cleaning, but is intended to float flux, oxide, etc. by steam cleaning and to complete cleaning by subsequent water cleaning. In the present invention, the steam temperature is a temperature at a portion where the steam contacts the heat exchanger. If the temperature at this portion is less than 80 ° C., the floating effect and the cleaning effect are small, and even if it exceeds 150 ° C. It is uneconomical because an effect commensurate with it cannot be obtained. In the present invention, steam cleaning is intended to float flux, oxides, etc., and therefore the steam cleaning time is not particularly limited, but generally 10 seconds or less, usually several seconds is sufficient.
本発明においては、スチームが熱交換器に衝突する際の圧力はフラックス、酸化物などを浮かすのに十分であるが、アルミニウム材からなるフィン等を変形させない圧力であることが必要であり、普通にはスチームが熱交換器に衝突する際の圧力がゲージ圧で０．１〜０．５ＭＰａとなる条件下で洗浄を行うことが好ましい。 In the present invention, the pressure at which the steam collides with the heat exchanger is sufficient to float the flux, oxide, etc., but it is necessary to be a pressure that does not deform the fins made of aluminum, etc. In this case, it is preferable that the cleaning is performed under the condition that the pressure when the steam collides with the heat exchanger is 0.1 to 0.5 MPa as a gauge pressure.
本発明においては、次いで常温水、温水又は熱水を用いて水洗を行うが、この水洗は攪拌水等の流水中での洗浄、超音波を利用した水中での洗浄、ノズルからの水の吹きつけによる洗浄等の任意の方法によって実施できる。また、本発明においては、乾燥は空気中に放置しての乾燥、加熱炉中での乾燥、熱風を吹きつけての乾燥等の任意の方法によって実施できる。 In the present invention, washing with normal temperature water, hot water or hot water is then performed. This washing is performed in running water such as stirring water, washing in water using ultrasonic waves, or blowing water from a nozzle. It can be carried out by any method such as washing by attaching. In the present invention, the drying can be carried out by any method such as drying in the air, drying in a heating furnace, or drying by blowing hot air.
本発明においては、粉体塗料組成物以外の溶剤系、水系、活性エネルギー線硬化系等の任意の塗料組成物を用いて塗装することができる。また、塗装方法としては、エアスプレー塗装、エアレススプレー塗装、静電塗装等の噴霧塗装や電着塗装等を採用することができる。 In this invention, it can coat using arbitrary coating compositions, such as solvent systems other than a powder coating composition, water system, and an active energy ray hardening system. As a coating method, spraying such as air spray coating, airless spray coating, electrostatic coating, or electrodeposition coating can be employed.
以下に、実施例及び比較例に基づいて本発明を具体的に説明する。
実施例１
Ａ１１００製のチューブ芯材、Ａ３００３−Ｈ１４製のフィン、ＫＺｎＦ3系のフラックス及びＡｌ−Ｓｉ系（Ｓｉ含有率６質量％）のろう材を用いて熱交換器を製造した。シリカ粒子及び圧縮空気を用いるサンドブラストにより該熱交換器の表面にブラスト処理を施した。次いで、スチームが熱交換器に衝突する部分でのスチーム温度が約１００℃であり、スチームが熱交換器に衝突する際の圧力がゲージ圧で約０．３５ＭＰａとなる条件下で熱交換器の各部分を６秒間スチーム洗浄した。引き続いて、ノズルからの温水の吹きつけによる洗浄により水洗を行ない、熱風を吹きつけて乾燥させた。次いで、溶剤型メラミン樹脂塗料（大日本塗料株式会社製の商品名デリコンＬＢ＃９０を使用した）を該熱交換器の全表面にエアスプレー塗装し、焼付温度９０℃で２０分間焼付処理を実施した。塗装後の塗料の密着性を目視で判定した。塗りムラや塗り残し部分がなく、塗料の密着性は良好であった。
Hereinafter, the present invention will be described in detail based on examples and comparative examples.
Example 1
A heat exchanger was manufactured using a tube core material made of A1100, fins made of A3003-H14, a flux of KZnF 3 and a brazing material of Al—Si (Si content 6 mass%). The surface of the heat exchanger was blasted by sand blasting using silica particles and compressed air. Next, the steam temperature at the portion where the steam collides with the heat exchanger is about 100 ° C., and the pressure when the steam collides with the heat exchanger is about 0.35 MPa as the gauge pressure. Each part was steam cleaned for 6 seconds. Subsequently, washing was performed by washing with hot water from a nozzle, and drying was performed by blowing hot air. Next, solvent-type melamine resin paint (using the trade name “Delicon LB # 90” manufactured by Dainippon Paint Co., Ltd.) was sprayed on the entire surface of the heat exchanger, and baked at a baking temperature of 90 ° C. for 20 minutes. did. The adhesion of the paint after painting was judged visually. There was no coating unevenness or unpainted part, and the adhesion of the paint was good.
実施例２
Ａ１１００製のチューブ芯材、Ａ３００３−Ｈ１４製のフィン、ＫＺｎＦ3系のフラックス及びＡｌ−Ｓｉ系（Ｓｉ含有率６質量％）のろう材を用いて熱交換器を製造した。シリカ粒子及び圧縮空気を用いるサンドブラストにより該熱交換器の表面にブラスト処理を施した。次いで、スチームが熱交換器に衝突する部分でのスチーム温度が約１００℃であり、スチームが熱交換器に衝突する際の圧力がゲージ圧で約０．３５ＭＰａとなる条件下で熱交換器の各部分を６秒間スチーム洗浄した。引き続いて、ノズルからの温水の吹きつけによる洗浄により水洗を行ない、熱風を吹きつけて乾燥させた。次いで、メラミン樹脂系水系塗料（大日本塗料株式会社製の商品名テクノン＃３００を使用した）を該熱交換器の全表面にエアスプレー塗装し、焼付温度１５０℃で２０分間焼付処理を実施した。塗装後の塗料の密着性を目視で判定した。塗りムラや塗り残し部分がなく、塗料の密着性は良好であった。
Example 2
A heat exchanger was manufactured using a tube core material made of A1100, a fin made of A3003-H14, a flux of KZnF 3 and a brazing material of Al—Si (Si content 6 mass%). The surface of the heat exchanger was blasted by sand blasting using silica particles and compressed air. Next, the steam temperature of the portion where the steam collides with the heat exchanger is about 100 ° C., and the pressure when the steam collides with the heat exchanger is about 0.35 MPa as the gauge pressure. Each part was steam cleaned for 6 seconds. Subsequently, washing was performed by washing with hot water from a nozzle, and drying was performed by blowing hot air. Subsequently, a melamine resin-based water-based paint (trade name Technon # 300 manufactured by Dainippon Paint Co., Ltd. was used) was sprayed onto the entire surface of the heat exchanger and baked at a baking temperature of 150 ° C. for 20 minutes. . The adhesion of the paint after painting was judged visually. There was no coating unevenness or unpainted part, and the adhesion of the paint was good.
比較例１
Ａ１１００製のチューブ芯材、Ａ３００３−Ｈ１４製のフィン、ＫＺｎＦ3系のフラックス及びＡｌ−Ｓｉ系（Ｓｉ含有率６質量％）のろう材を用いて熱交換器を製造した。シリカ粒子及び圧縮空気を用いるサンドブラストにより該熱交換器の表面にブラスト処理を施した。次いで、溶剤型メラミン樹脂塗料（大日本塗料株式会社製の商品名デリコンＬＢ＃９０を使用した）を該熱交換器の全表面にエアスプレー塗装し、焼付温度９０℃で２０分間焼付処理を実施した。塗装後の塗料の密着性を目視で判定した。フラックスを塗布した部分の一部に塗りムラや塗り残し部分が認められた。
Comparative Example 1
A heat exchanger was manufactured using a tube core material made of A1100, a fin made of A3003-H14, a flux of KZnF 3 and a brazing material of Al—Si (Si content 6 mass%). The surface of the heat exchanger was blasted by sand blasting using silica particles and compressed air. Next, a solvent-type melamine resin paint (using a trade name “Delicon LB # 90” manufactured by Dainippon Paint Co., Ltd.) was applied to the entire surface of the heat exchanger by air spraying, followed by baking at a baking temperature of 90 ° C. for 20 minutes did. The adhesion of the paint after painting was judged visually. The coating unevenness and the unpainted part were recognized in a part of the part which applied the flux.
比較例２
Ａ１１００製のチューブ芯材、Ａ３００３−Ｈ１４製のフィン、ＫＺｎＦ3系のフラックス及びＡｌ−Ｓｉ系（Ｓｉ含有率６質量％）のろう材を用いて熱交換器を製造した。シリカ粒子及び圧縮空気を用いるサンドブラストにより該熱交換器の表面にブラスト処理を施した。次いで、メラミン樹脂系水系塗料（大日本塗料株式会社製の商品名テクノン＃３００を使用した）を該熱交換器の全表面にエアスプレー塗装し、焼付温度１５０℃で２０分間焼付処理を実施した。塗装後の塗料の密着性を目視で判定した。フラックスを塗布した部分の一部に塗りムラや塗り残し部分が認められた。
Comparative Example 2
A heat exchanger was manufactured using a tube core material made of A1100, a fin made of A3003-H14, a flux of KZnF 3 and a brazing material of Al—Si (Si content 6 mass%). The surface of the heat exchanger was blasted by sand blasting using silica particles and compressed air. Subsequently, a melamine resin-based water-based paint (trade name Technon # 300 manufactured by Dainippon Paint Co., Ltd. was used) was sprayed onto the entire surface of the heat exchanger and baked at a baking temperature of 150 ° C. for 20 minutes. . The adhesion of the paint after painting was judged visually. The coating unevenness and the unpainted part were recognized in a part of the part which applied the flux.
Claims (2)
The aluminum material heat exchanger manufactured by brazing with a flux according to claim 1, wherein cleaning is performed under a condition that the pressure when the steam collides with the heat exchanger is 0.1 to 0.5 MPa in gauge pressure. How to paint.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322833A (en) * | 1976-08-17 | 1978-03-02 | Nippon Paint Co Ltd | Surface treatment of aluminum member |
| JPS5636318A (en) * | 1980-08-11 | 1981-04-09 | Daiwa Kokan Kogyo Kk | Manufacture of steel pipe plated with molten metal |
| JPS60125276A (en) * | 1983-12-07 | 1985-07-04 | Aichi Electric Mfg Co Ltd | Surface treatment of outer case of electric machinery |
| JPH08323278A (en) * | 1995-05-31 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Method for applying powder of brazing material and method for manufacturing heat exchanger |
| JP2004291445A (en) * | 2003-03-27 | 2004-10-21 | Nippon Light Metal Co Ltd | Surface treated aluminum material and method for producing the same |
| JP2005313198A (en) * | 2004-04-28 | 2005-11-10 | Air Water Inc | Flux removing method |
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2006
- 2006-01-26 JP JP2006017567A patent/JP4756591B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322833A (en) * | 1976-08-17 | 1978-03-02 | Nippon Paint Co Ltd | Surface treatment of aluminum member |
| JPS5636318A (en) * | 1980-08-11 | 1981-04-09 | Daiwa Kokan Kogyo Kk | Manufacture of steel pipe plated with molten metal |
| JPS60125276A (en) * | 1983-12-07 | 1985-07-04 | Aichi Electric Mfg Co Ltd | Surface treatment of outer case of electric machinery |
| JPH08323278A (en) * | 1995-05-31 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Method for applying powder of brazing material and method for manufacturing heat exchanger |
| JP2004291445A (en) * | 2003-03-27 | 2004-10-21 | Nippon Light Metal Co Ltd | Surface treated aluminum material and method for producing the same |
| JP2005313198A (en) * | 2004-04-28 | 2005-11-10 | Air Water Inc | Flux removing method |
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