JPH0313309B2 - - Google Patents
Info
- Publication number
- JPH0313309B2 JPH0313309B2 JP57208326A JP20832682A JPH0313309B2 JP H0313309 B2 JPH0313309 B2 JP H0313309B2 JP 57208326 A JP57208326 A JP 57208326A JP 20832682 A JP20832682 A JP 20832682A JP H0313309 B2 JPH0313309 B2 JP H0313309B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- aluminum
- fins
- film
- ppm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000005260 corrosion Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 10
- 238000004381 surface treatment Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 229910001593 boehmite Inorganic materials 0.000 description 6
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 229960002050 hydrofluoric acid Drugs 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/66—Treatment of aluminium or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
本発明は、アルミニウム又はアルミニウム合金
製の熱交換器用フインの製造方法に関するもので
ある。
The present invention relates to a method for manufacturing heat exchanger fins made of aluminum or aluminum alloy.
熱交換器用のフインの表面は、水濡れ性や耐食
性の観点から表面処理が行なわれている。
このような表面処理の一つとして、アルミニウ
ム又はアルミニウム合金（以下、アルミニウム）
の表面に酸化皮膜を生成させる化成処理法、例え
ばクロメート法又はベーマイト法等が知られてい
る。
これらの化成処理法のうちクロメート法は、ク
ロム酸、フツ化酸、シアン等を含むクロメート処
理液に、アルミニウムを浸漬することにより、ア
ルミニウム表面に酸化皮膜を生成させるものであ
り、クロメート処理後の排液中にクロム、シアン
等の有害物が含まれているので、その排液処理に
莫大な費用が要り、コスト高なものとなつてい
る。さらに、クロメート処理したアルミニウム
は、その表面の水濡れ性が悪いので、伝熱効果に
劣り、従つてフイン材の表面処理には適したもの
でないといつた致命的欠点がある。
又、ベーマイト法は、アルミニウムを80℃以上
の高温の加熱水又は水蒸気に接触させることによ
り、アルミニウム表面にベーマイト皮膜を生成さ
せるものであり、このベーマイト皮膜は約0.2〜
2μの厚さにすぎないので、耐食性が良くない。
そこで、このベーマイト法の改良として、加熱
水中にアンモニア、トリエタノールアミン等を添
加しておくことにより、耐食性の向上を計る方法
が提案されている。しかし、アンモニア、トリエ
タノールアミン等を加えた加熱水処理による改良
ベーマイト法による皮膜であつても、比較的軽い
腐食環境（JIS Z2371 塩水噴霧試験 240時間
程度）ではある程度の効果があつても、厳しい腐
食環境（例えばCASS試験 JIS H8681）ではク
ロメート皮膜の半分程度の防食効果しかないとい
つた致命的欠点がある。
又、アルミニウムの表面処理として、アルミニ
ウムを有機アミンを含む水溶性熱硬化性樹脂塗料
に浸漬する方法も提案（特開昭48−83123号公報、
特開昭52−78244号公報）されているが、これら
の提案のものを熱交換器のフインの製造に応用し
ても、良好なフインは得られなかつた。
The surface of heat exchanger fins is subjected to surface treatment from the viewpoint of water wettability and corrosion resistance. As one such surface treatment, aluminum or aluminum alloy (hereinafter referred to as aluminum)
Chemical conversion treatment methods, such as the chromate method and the boehmite method, are known to produce an oxide film on the surface of the material. Among these chemical conversion treatment methods, the chromate method generates an oxide film on the aluminum surface by immersing aluminum in a chromate treatment solution containing chromic acid, fluoric acid, cyanide, etc. Since the wastewater contains harmful substances such as chromium and cyanide, a huge amount of money is required to treat the wastewater, making it expensive. Furthermore, chromate-treated aluminum has a fatal drawback in that its surface has poor water wettability, resulting in inferior heat transfer effects and, therefore, being unsuitable for surface treatment of fin materials. In addition, the boehmite method produces a boehmite film on the aluminum surface by bringing aluminum into contact with heated water or steam at a temperature of 80°C or higher.
Since it is only 2μ thick, its corrosion resistance is poor. Therefore, as an improvement to the boehmite method, a method has been proposed in which the corrosion resistance is improved by adding ammonia, triethanolamine, etc. to the heated water. However, even if the film is made by the improved boehmite method using heated water treatment with the addition of ammonia, triethanolamine, etc., it may be effective to some extent in a relatively mild corrosive environment (JIS Z2371 salt spray test for about 240 hours), A fatal drawback is that in corrosive environments (for example, CASS test JIS H8681), the anti-corrosion effect is only about half that of chromate coatings. In addition, as a surface treatment for aluminum, a method of immersing aluminum in a water-soluble thermosetting resin paint containing an organic amine was also proposed (Japanese Patent Application Laid-open No. 83123/1983,
However, even when these proposals were applied to the production of fins for heat exchangers, good fins could not be obtained.
本発明の第１の目的は、耐食性に優れた熱交換
器用のフインを提供することである。 本発明の
第２の目的は、水濡れ性に優れた熱交換器用のフ
インを提供することである。
本発明の第３の目的は、加工性が良い為、コス
トが低廉な熱交換器用のフインを提供することで
ある。
上記本発明の目的は、約100〜20000ppmのＮ，
Ｎ−ジアルキルエタノールアミンと約５〜
500ppmの水溶性有機樹脂とを含む水溶液で、ア
ルミニウム又はアルミニウム合金からなる熱交換
器用フイン材を処理することを特徴とする熱交換
器用フインの製造方法によつて達成される。
以下、本発明を詳細に説明する。
本発明に用いられる水溶性有機樹脂としては、
例えば不飽和カルボン酸又はその誘導体、オレフ
イン、ウレタンもしくはこれらの共重合体等があ
り、特に最も好ましいものはアクリル樹脂、アク
リルメラミン樹脂又はエポキシフエノール樹脂で
あり、このような水溶性有機樹脂の濃度は約５〜
500ppmでなければならない。
すなわち、水溶性有機樹脂の濃度が5ppmより
少なすぎると効果が小さく、従つて5ppm以上な
ければならず、しかしながら水溶性有機樹脂の濃
度が500ppmを越えて多すぎる場合には、全く予
想もできなかつたことではあるが、加工性が低下
し、金型の寿命が短く、フイン製造コストが高い
ものとなつてしまう。それ故、水溶性有機樹脂の
濃度は約500ppm以下のものでなければならない。
尚、水溶性有機樹脂の濃度は約10〜50ppmであ
ることがより好ましい。
又、本発明に用いる一般式Ｒ（Ｒ）Ｎ−CH2−
CH2OH（但し、Ｒは炭素数１〜４のアルキル基）
で表されるＮ，Ｎ−ジアルキルエタノールアミン
は、その濃度が約100〜20000ppmのものでなけれ
ばならない。
尚、特に好ましくは3000〜8000ppmのものであ
る。
そして、上記のような濃度の水溶性有機樹脂と
Ｎ、Ｎ−ジアルキルエタノールアミンとを含む水
溶液を用いてアルミニウムが処理される訳である
が、その処理は温度が60℃以上で約１〜30分、好
ましくは２〜５分である。
尚、上記のような表面処理後に、該アルミニウ
ムを、例えばアルカリ金属酸化物と二酸化ケイ素
とを含む水溶液で処理すれば、極めて望ましいも
のとなる。
そして、本発明の実施によつてフイン材の表面
に化成される皮膜は、第１図にその走査電子顕微
鏡写真を示すように、単なるＮ、Ｎ−ジアルキル
エタノールアミン水溶液処理による皮膜（第２図
に示す走査電子顕微鏡写真）とは異なり、皮膜の
欠陥部の少ない、耐食性に極めて優れたものであ
ることが判る。
実施例 １〜６
純水（脱イオン水）中に水溶性樹脂の固形分が
30ppmとＮ、Ｎ−ジアルキルエタノールアミンが
5000ppm含まれている水溶液を60℃以上に加熱
し、この加熱水溶液中にJIS 1200 Ｈ 24アルミ
ニウム展伸材コイル（115mm×50ｍ×0.115mm）を
連続浸漬処理する。
このようにして表面処理が行なわれたアルミニ
ウム展伸材コイルを加工して熱交換基用のフイン
を得た。
比較例 １
実施例１において、Ｎ、Ｎ−ジアルキルエタノ
ールアミンを添加せず、その他は同様に行つた。
比較例 ２
実施例１において、水溶性樹脂を添加せず、そ
の他は同様に行つた。
比較例 ３
実施例１おいて、水溶性樹脂の添加濃度を
1000ppm、Ｎ、Ｎ−ジアルキルエタノールアミン
の添加濃度を30000ppmとする他は同様に行つた。
比較例 ４
通常のベーマイト処理したアルミニウム展伸材
コイルを加工して熱交換器用のフインを得た。
比較例 ５
中性洗剤脱脂処理のみのアルミニウム展伸材コ
イルを加工して熱交換器用のフインを得た。
A first object of the present invention is to provide a fin for a heat exchanger that has excellent corrosion resistance. A second object of the present invention is to provide a fin for a heat exchanger that has excellent water wettability. A third object of the present invention is to provide a fin for a heat exchanger that has good workability and is therefore inexpensive. The object of the present invention is to contain about 100 to 20,000 ppm of N,
N-dialkylethanolamine and about 5 to
This is achieved by a method for producing a heat exchanger fin, which is characterized by treating a heat exchanger fin material made of aluminum or an aluminum alloy with an aqueous solution containing 500 ppm of a water-soluble organic resin. The present invention will be explained in detail below. The water-soluble organic resin used in the present invention includes:
Examples include unsaturated carboxylic acids or their derivatives, olefins, urethanes, or copolymers thereof, and the most preferred are acrylic resins, acrylic melamine resins, and epoxyphenol resins, and the concentration of such water-soluble organic resins is Approximately 5~
Must be 500ppm. In other words, if the concentration of the water-soluble organic resin is less than 5 ppm, the effect will be small, so it must be 5 ppm or more. However, the processability is reduced, the life of the mold is shortened, and the fin manufacturing cost becomes high. Therefore, the concentration of water-soluble organic resin should be less than about 500 ppm. Note that the concentration of the water-soluble organic resin is more preferably about 10 to 50 ppm. Furthermore, the general formula R(R)N-CH 2 - used in the present invention
CH 2 OH (R is an alkyl group having 1 to 4 carbon atoms)
The N,N-dialkylethanolamine represented by should have a concentration of about 100 to 20,000 ppm. It should be noted that the content is particularly preferably 3000 to 8000 ppm. Then, aluminum is treated using an aqueous solution containing a water-soluble organic resin and N,N-dialkylethanolamine at the above concentration, and the treatment is carried out at a temperature of 60°C or higher and at a temperature of about 1 to 30°C. minutes, preferably 2 to 5 minutes. It is highly desirable to treat the aluminum, for example, with an aqueous solution containing an alkali metal oxide and silicon dioxide after the surface treatment as described above. The film chemically formed on the surface of the fin material by carrying out the present invention is, as shown in the scanning electron micrograph of FIG. It can be seen that, unlike the scanning electron micrograph (shown in Figure 1), the coating has very few defects and has extremely excellent corrosion resistance. Examples 1 to 6 Solid content of water-soluble resin in pure water (deionized water)
30ppm and N,N-dialkylethanolamine
An aqueous solution containing 5000 ppm is heated to 60°C or higher, and a JIS 1200 H 24 wrought aluminum coil (115 mm x 50 m x 0.115 mm) is continuously immersed in this heated aqueous solution. The aluminum wrought coil that had been surface-treated in this manner was processed to obtain fins for a heat exchange base. Comparative Example 1 The same procedure as in Example 1 was carried out except that N,N-dialkylethanolamine was not added. Comparative Example 2 The same procedure as in Example 1 was carried out except that no water-soluble resin was added. Comparative Example 3 In Example 1, the concentration of water-soluble resin added was
The same procedure was carried out except that the concentration of N,N-dialkylethanolamine was changed to 1000 ppm and 30000 ppm. Comparative Example 4 An ordinary boehmite-treated aluminum wrought coil was processed to obtain fins for a heat exchanger. Comparative Example 5 A fin for a heat exchanger was obtained by processing a coil of aluminum wrought material that had only been degreased with a neutral detergent.
上記のようにして得たフインについて、その皮
膜外観、耐食性、水濡れ性、皮膜生成量、剥離強
度、フイン加工性等の特性を調べると、次の表に
示す通りである。
The properties of the fins obtained as described above, including film appearance, corrosion resistance, water wettability, film formation amount, peel strength, and fin processability, were investigated as shown in the following table.
【表】
尚、表中、塩水噴霧試験は、JIS Ｚ 2371によ
る塩水噴霧試験336時間後レイテイングナンバー
表示法により示したものであり、又、CASS試験
は、JIS Ｈ 8681によるCASS試験９時間後、レ
イテイングナンバー表示法により示したものであ
り、10の数字が最高のものを示し、数字が小さく
なるにつれて耐食性は悪くなることを示す。
又、水濡れ性は、協和接触角計CA−Ｄ型によ
り測定した接触角で表示したものであり、接触角
が小さい程水濡れ性は良好である。
又、皮膜生成量は、JIS Ｈ 8680による皮膜重
量測定法によるものである。そして、剥離強度
は、アクリルメラミン系塗料（日本ペイント社
製、NPアルコートLX80−119）を４ｇ／m2塗布
した後、220℃で30秒間乾燥した塗装材同士をポ
リアミド系フイルムで熱圧着したサンプルを180°
剥離試験し、その剥離強度を測定したものであ
る。
これによれば、本発明になるものは、耐食性に
優れたものであり、かつ、水濡れ性にも極めて優
れていて、熱交換効率の高いことが判り、さらに
は表面処理皮膜の剥離に対する強度が高く、剥が
れにくいものであり、そして本発明になるフイン
の表面処理は単時間で行え、処理効率の良いもの
であり、しかも処理液の後処理も簡単で、公害問
題を引き起こすようなこともなく、低コストで実
施できるものであり、さらにはフインへの加工性
が良く、例えば皮膜は剥離せず、かつ、フイン加
工の金型の寿命は長く、製造コストが低廉なもの
である。
これに対して、比較例１のように、Ｎ，Ｎ−ジ
アルキルエタノールアミンが用いられていない場
合には、フインの耐食性は劣り、又、水濡れ性も
悪く、熱交換効率は本発明のように良いものでは
なく、さらには表面処理皮膜の剥離に対する強度
も小さく、フインの加工に際して皮膜が剥離しや
すかつた。
又、比較例２のように、水溶性樹脂が用いられ
ていない場合には、フインの耐食性は劣り、又、
表面処理皮膜の剥離に対する強度も小さい。
又、比較例３のように、Ｎ，Ｎ−ジアルキルエ
タノールアミン及び水溶性樹脂が用いられても、
これらの濃度が高い場合には、全く予想もできな
かつたことであるが、フインの水濡れ性が良くな
く、しかもフインへの加工性が悪く、すなわちフ
イン加工の金型の寿命が短く、フイン製造コスト
が高く付く。[Table] In the table, the salt spray test is shown by the rating number display method after 336 hours of the salt water spray test according to JIS Z 2371, and the CASS test is the result after 9 hours of the CASS test according to JIS H 8681. , which is indicated by the rating number display method, where a number of 10 indicates the best, and the smaller the number, the worse the corrosion resistance. Further, water wettability is expressed as a contact angle measured by a Kyowa contact angle meter model CA-D, and the smaller the contact angle, the better the water wettability. Further, the amount of film formed is determined by the film weight measurement method according to JIS H 8680. The peel strength was measured using a sample obtained by applying 4 g/ m2 of acrylic melamine paint (NP Alcoat LX80-119, manufactured by Nippon Paint Co., Ltd.), drying it at 220°C for 30 seconds, and bonding the painted materials together using polyamide film. 180°
A peel test was conducted and the peel strength was measured. According to this, it was found that the product of the present invention has excellent corrosion resistance, extremely excellent water wettability, high heat exchange efficiency, and also has strength against peeling of the surface treatment film. The surface treatment of the fins of the present invention can be carried out in a single hour and has high treatment efficiency. Moreover, the post-treatment of the treatment solution is easy and does not cause pollution problems. Moreover, it can be carried out at low cost, has good processability into fins, for example, the film does not peel off, the life of the mold for fin processing is long, and the manufacturing cost is low. On the other hand, when N,N-dialkylethanolamine is not used as in Comparative Example 1, the corrosion resistance of the fins is poor, the water wettability is poor, and the heat exchange efficiency is not as good as that of the present invention. Furthermore, the strength against peeling of the surface treatment film was low, and the film was easily peeled off during processing of the fins. In addition, as in Comparative Example 2, when a water-soluble resin is not used, the corrosion resistance of the fins is poor;
The strength against peeling of the surface treatment film is also low. Moreover, even if N,N-dialkylethanolamine and water-soluble resin are used as in Comparative Example 3,
When these concentrations are high, which was completely unexpected, the water wettability of the fins is poor, and the processability of the fins is poor, which means that the life of the mold for fin processing is short, and the fins are Manufacturing costs are high.
第１図は本発明のフイン製造の処理による皮膜
の電子顕微鏡写真、第２図はＮ，Ｎ−ジアルキル
エタノールアミン水溶液による処理皮膜の電子顕
微鏡写真である。
FIG. 1 is an electron micrograph of a film obtained by the treatment for producing fins of the present invention, and FIG. 2 is an electron micrograph of a film treated with an aqueous N,N-dialkylethanolamine solution.
Claims (1)
ノールアミンと約５〜500ppmの水溶性有機樹脂
とを含む水溶液で、アルミニウム又はアルミニウ
ム合金からなる熱交換器用フイン材を処理するこ
とを特徴とする熱交換器用フインの製造方法。1. A heat exchanger characterized by treating a heat exchanger fin material made of aluminum or aluminum alloy with an aqueous solution containing about 100 to 20,000 ppm of N,N-dialkylethanolamine and about 5 to 500 ppm of a water-soluble organic resin. How to make dexterous fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20832682A JPS59100271A (en) | 1982-11-27 | 1982-11-27 | Surface treatment of aluminum or aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20832682A JPS59100271A (en) | 1982-11-27 | 1982-11-27 | Surface treatment of aluminum or aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59100271A JPS59100271A (en) | 1984-06-09 |
| JPH0313309B2 true JPH0313309B2 (en) | 1991-02-22 |
Family
ID=16554408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20832682A Granted JPS59100271A (en) | 1982-11-27 | 1982-11-27 | Surface treatment of aluminum or aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59100271A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019102915A1 (en) * | 2017-11-24 | 2019-05-31 | 三菱アルミニウム株式会社 | Aluminum fin having excellent hydrophilicity after brazing, and heat exchanger and method for producing same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4883123A (en) * | 1972-02-09 | 1973-11-06 | ||
| JPS5278244A (en) * | 1976-09-16 | 1977-07-01 | Riken Keikinzoku Kogyo Kk | Method of forming coated film on aluminum alloy |
-
1982
- 1982-11-27 JP JP20832682A patent/JPS59100271A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4883123A (en) * | 1972-02-09 | 1973-11-06 | ||
| JPS5278244A (en) * | 1976-09-16 | 1977-07-01 | Riken Keikinzoku Kogyo Kk | Method of forming coated film on aluminum alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59100271A (en) | 1984-06-09 |
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