JPH0247272A - Production of precoated fin material for heat exchanger - Google Patents
Production of precoated fin material for heat exchangerInfo
- Publication number
- JPH0247272A JPH0247272A JP19846388A JP19846388A JPH0247272A JP H0247272 A JPH0247272 A JP H0247272A JP 19846388 A JP19846388 A JP 19846388A JP 19846388 A JP19846388 A JP 19846388A JP H0247272 A JPH0247272 A JP H0247272A
- Authority
- JP
- Japan
- Prior art keywords
- silicate
- fin material
- heat exchanger
- alkali silicate
- alkali
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims abstract description 19
- 235000011007 phosphoric acid Nutrition 0.000 claims abstract description 10
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 4
- 239000004111 Potassium silicate Substances 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 3
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052912 lithium silicate Inorganic materials 0.000 claims abstract description 3
- 229910052913 potassium silicate Inorganic materials 0.000 claims abstract description 3
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 3
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 3
- 239000011734 sodium Substances 0.000 claims abstract description 3
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 17
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 238000004532 chromating Methods 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004583 superabsorbent polymers (SAPs) Substances 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
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
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)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフィン材の表面に耐水性皮膜および親水性皮膜
を形成した、耐食性および親水性に優れた熱交換器用プ
レコートフィン材の製造方法に関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for producing a precoated fin material for a heat exchanger that has excellent corrosion resistance and hydrophilicity and has a water-resistant film and a hydrophilic film formed on the surface of the fin material. It is something.
一般に熱交換器、特に空気調和器の蒸発器等においては
、フィンの表面温度が大気の露点温度以下になるためフ
ィン表面に水滴が付着する。このような水滴の付着によ
り通風抵抗が増大し、かつ風量が減少して熱交換効率が
低下する。これは熱交換器の性能向上と小型化のためフ
ィンピッチを狭くした場合、特に顕著に現れる。熱交換
効率はフィン表面の水のぬれ性が大きく影響するもので
あり、フィン表面のぬれ性が良いと付着した水が水滴と
なり難く、このため通風抵抗が小さくなり、風量も多く
なり熱交換効率が増大する。このような表面のぬれ性を
改良するために従来はフィンとチューブを組合わせて熱
交換器を構成した後に溶液中に浸漬することにより表面
処理を行ない、フィンの表面に親水性皮膜を形成する方
法が行なわれていた。In general, in a heat exchanger, particularly in an evaporator of an air conditioner, etc., water droplets adhere to the fin surface because the surface temperature of the fin is below the dew point temperature of the atmosphere. Due to the adhesion of such water droplets, ventilation resistance increases, the air volume decreases, and heat exchange efficiency decreases. This becomes especially noticeable when the fin pitch is narrowed to improve the performance and downsize the heat exchanger. Heat exchange efficiency is greatly influenced by the wettability of water on the fin surface.If the fin surface has good wettability, attached water will be less likely to form droplets, which will reduce ventilation resistance and increase air volume, which will improve heat exchange efficiency. increases. In order to improve the wettability of such surfaces, the conventional method is to combine fins and tubes to form a heat exchanger, and then perform surface treatment by immersing the heat exchanger in a solution to form a hydrophilic film on the surface of the fins. method was being used.
しかしこのような方法においては、チューブの両端を完
全に密閉しておく必要があるなど作業が非常に面倒であ
ると共に、フィンの形状、フィンピッチなどに制約があ
り、またその形状が複雑なため、液だまりの発生等によ
り、フィン全面に均一な皮膜を形成することが困難であ
り、性能にバラツキが生じた。さらに性能向上のために
フィンピッチを狭くした場合には、内部まで処理液が浸
透せず、フィン表面に親水性皮膜のない部分が生じた。However, with this method, the work is very cumbersome as it is necessary to completely seal both ends of the tube, and there are restrictions on the shape of the fins, fin pitch, etc., and the shape is complex. Due to the formation of liquid pools, it was difficult to form a uniform film over the entire surface of the fin, and performance varied. Furthermore, when the fin pitch was narrowed to improve performance, the treatment liquid did not penetrate into the fins, resulting in areas without a hydrophilic film on the fin surfaces.
また熱交換器が大型の場合には大型の処理槽が必要とな
るなどの問題があった。Further, when the heat exchanger is large, there is a problem that a large treatment tank is required.
本発明は上記の問題について検討の結果なされたもので
、予めフィン材の表面に耐水性皮膜および親水性皮膜を
形成し、優れた耐食性および親水性を長時間維持するこ
とが可能で、かつ熱交換器として構成してからの表面処
理を不要とした熱交換器用プレコートフィン材の製造方
法を開発したものである。The present invention was developed as a result of studies on the above-mentioned problems, and it is possible to form a water-resistant film and a hydrophilic film on the surface of the fin material in advance to maintain excellent corrosion resistance and hydrophilicity for a long time. We have developed a method for manufacturing pre-coated fin materials for heat exchangers that eliminates the need for surface treatment after forming the exchanger.
〔課題を解決するための手段および作用〕本発明は、ア
ルミニウム素条の表面にクロメート処理を施し、次いで
正リン酸と高吸水性ポリマーを含むアルカリケイ酸塩水
溶液を塗布し、しかる後加熱、乾燥することを特徴とす
るプレコートフィン材の製造方法である。[Means and effects for solving the problems] The present invention applies chromate treatment to the surface of an aluminum strip, then applies an aqueous alkali silicate solution containing orthophosphoric acid and a superabsorbent polymer, and then heats it. This is a method for producing a precoated fin material, which is characterized by drying.
すなわち本発明は、アルミニウム素条に連続的にクロメ
ート処理を施して耐水性皮膜を形成させて耐食性を付与
し、この上に正リン酸および高吸水性ポリマーを含むア
ルカリケイ酸塩水溶液を塗布し、加熱乾燥させることに
より親水性皮膜を形成して親水性が良好なプレコートフ
ィン材を製造するものである。That is, in the present invention, an aluminum strip is continuously subjected to chromate treatment to form a water-resistant film to impart corrosion resistance, and an aqueous alkali silicate solution containing orthophosphoric acid and a superabsorbent polymer is applied thereon. By heating and drying, a hydrophilic film is formed to produce a pre-coated fin material with good hydrophilicity.
しかして上記のクロメート処理はクロム酸クロメート形
成剤の濃度を１．５〜３．０ｗｔ％とし、温度２０〜５
０°Ｃで１０秒〜５分間浸漬してＣ「の量を５０〜１５
０■／ポ付着させるものであり、このような条件であれ
ば良好な耐水性皮膜が得られるものである。またアルカ
リケイ酸塩水溶液は例えばケイ酸ソーダ、ケイ酸リチウ
ムの他、ケイ酸アンモニウム、ケイ酸カリなどをＳ ｉ
Ｏ，／ＭＥＯ（Ｍはリチウム、ナトリウム、カリウム
などのアルカリ金属）で表わす比が１以上、好ましくは
２〜５とすることにより良好な親水性皮膜が得られる。However, in the above chromate treatment, the concentration of the chromate chromate forming agent is 1.5 to 3.0 wt%, and the temperature is 20 to 5.
Soak at 0°C for 10 seconds to 5 minutes and reduce the amount of C to 50 to 15 minutes.
0.0 cm/po, and under these conditions a good water resistant film can be obtained. In addition, the alkali silicate aqueous solution includes, for example, sodium silicate, lithium silicate, ammonium silicate, potassium silicate, etc.
A good hydrophilic film can be obtained by setting the ratio expressed by O,/MEO (M is an alkali metal such as lithium, sodium, potassium, etc.) to 1 or more, preferably 2 to 5.
アルカリケイ酸塩中に含む正リン酸はアルカリケイ酸塩
中のアルカリ分を中和させるために用いるが、その含有
量はアルカリケイ酸塩中のアルカリ分の１〜１００％程
度が望ましい。The orthophosphoric acid contained in the alkali silicate is used to neutralize the alkaline content in the alkali silicate, and its content is preferably about 1 to 100% of the alkali content in the alkali silicate.
またアルカリケイ酸塩中に含む高吸水ポリマーとしては
、ポリビニルアルコール、酢酸メチルセルロース等をア
ルカリケイ酸塩の耐水性を高め、かつアルミニウムフィ
ンの加工性を向上させるために用いるが、その含有量は
アルカリケイ酸塩１重量部に対して０．０１〜０．１重
量部であることが望ましい、そして上記の加熱乾燥は１
．５０〜２゜０℃の大気中でｌＯ〜３０秒程度乾燥すれ
ばよい。In addition, as super absorbent polymers contained in alkali silicate, polyvinyl alcohol, methylcellulose acetate, etc. are used to increase the water resistance of alkali silicate and improve the workability of aluminum fins, but the content is limited to alkali. The amount is preferably 0.01 to 0.1 part by weight per 1 part by weight of the silicate, and the above heat drying is performed at 1 part by weight.
．． It is sufficient to dry it in the atmosphere at 50 to 2.0°C for about 10 to 30 seconds.
以下に本発明の一実施例について説明する。 An embodiment of the present invention will be described below.
実施例１
フィン用アルミニウム素条としてＪＩＳＩｌｏｏ−Ｈ２
４、厚さ０．１５ｒｔｍのものを用い、クロメート処理
液として日本ペイント社製のアロジン２６００（商品名
）を濃度２．０圓ｔ％とし液温３０’Ｃとして上記素条
を３０秒間浸漬した。その後、溶液２３０ｄ中に３号ケ
イ酸ソーダ２０−１５ Ｖｏ Ｉ！。Example 1 JISIloo-H2 as aluminum strip for fins
4. Using a material with a thickness of 0.15 rtm, the above-mentioned strip was immersed for 30 seconds in Alodine 2600 (trade name) manufactured by Nippon Paint Co., Ltd. as a chromate treatment solution at a concentration of 2.0 gt% and at a temperature of 30'C. . After that, No. 3 sodium silicate 20-15 Vo I! was added to the solution 230d. .
％ニリン酸溶液を１７．５ ｄ、酢酸メチルセルロース
としてＣ，Ｍ、Ｃ，１３５０（ダイセル化学社製、商品
名）３．０ｎｔ％の溶液を含むように溶液を調整し、こ
れを親水性溶液として、クロメート皮膜上に塗布した後
大気中で１５０ ’ＣＩ ５秒間加熱し、乾燥してプレ
コートフィン材とした。The solution was adjusted to contain 17.5 d% of diphosphoric acid solution and 3.0 nt% of C, M, C, 1350 (manufactured by Daicel Chemical Co., Ltd., trade name) as methylcellulose acetate, and this was used as a hydrophilic solution. After coating on the chromate film, it was heated in the air at 150' CI for 5 seconds and dried to obtain a pre-coated fin material.
実施例２
実施例１と同様にしてクロメート処理を施し、その後溶
液２３０ａｄ中に３号ケイ酸ソーダ２０ｍ、５Ｖｏｆｆ
ｉ正リン酸溶液を１７．５ｄ、ポリビニルアルコールと
してクラレボパール（クラレ社製、商品名）４．０ｗｔ
％溶液を３０ｄ含む溶液を調整し、これを親水性溶液と
して、クロメート皮膜上に塗布した後大気中１５０°Ｃ
１５秒間加熱し乾燥してプレコートフィン材とした。Example 2 Chromate treatment was performed in the same manner as in Example 1, and then 20 m of No. 3 sodium silicate and 5 Voff were added to the solution 230 ad.
i 17.5 d of orthophosphoric acid solution, 4.0 wt of Kuraray Bhopal (manufactured by Kuraray Co., Ltd., trade name) as polyvinyl alcohol
A solution containing 30d of % solution was prepared, and this was applied as a hydrophilic solution onto the chromate film, and then heated at 150°C in the atmosphere.
It was heated for 15 seconds and dried to obtain a pre-coated fin material.
比較例１
実施例１と同様にしてクロメート処理を施し、その後３
号ケイ酸ソーダを純水で１０倍に希釈した溶液をクロメ
ート皮膜上に塗布し、大気中で１５０℃、１５秒間加熱
乾燥した。Comparative Example 1 Chromate treatment was performed in the same manner as in Example 1, and then 3
A solution of sodium silicate diluted 10 times with pure water was applied onto the chromate film and dried by heating at 150° C. for 15 seconds in the air.
比較例２
実施例１と同様にしてクロメート処理を施し、その後溶
液２００ｄに３号ケイ酸ソーダ２０１ｄ、５Ｖｏｊ！％
リン酸１７．５ｄを含むように調整し、この溶液をクロ
メート皮膜上に塗布し、大気中で１５０°Ｃ５１５秒間
加熱乾燥した。Comparative Example 2 Chromate treatment was performed in the same manner as in Example 1, and then No. 3 sodium silicate 201d was added to 200d of the solution, and 5Voj! %
This solution was adjusted to contain 17.5 d of phosphoric acid, and this solution was applied onto the chromate film and dried by heating at 150° C. for 515 seconds in the air.
上記の実施例および比較例で作製した試料について、プ
レス油を表面に付着させ、そのプレス油をトリエタンに
浸漬して除去した後、流水中に８時間浸漬、乾燥８０°
Ｃ１６時間を１サイクルとし、これを１６回継続したと
きの接触角の変化を測定して親水性の評価を行なった。For the samples prepared in the above Examples and Comparative Examples, press oil was attached to the surface, the press oil was removed by immersion in triethane, and then immersed in running water for 8 hours and dried at 80°C.
Hydrophilicity was evaluated by measuring the change in contact angle when one cycle was C16 hours and this cycle was continued 16 times.
この結果を第１図に示す。The results are shown in FIG.
第１図から明らかなように、本発明の実施例においては
いずれもサイクル数１６回においても接触簿は小さく親
水性が優れている。これに対し従来の親水性溶液を用い
た比較例はいずれも接触角が増大し親水性が低下するこ
とが判る。As is clear from FIG. 1, in all of the examples of the present invention, even after 16 cycles, the contact area was small and the hydrophilicity was excellent. On the other hand, it can be seen that in all comparative examples using conventional hydrophilic solutions, the contact angle increases and the hydrophilicity decreases.
以上に説明したように本発明によれば、フィン材の表面
に耐水性皮膜および親水性皮膜を形成させることにより
優れた耐食性および親水性を有する熱交換器用プレコー
トフィン材が得られるもので工業上顕著な効果を奏する
ものである。As explained above, according to the present invention, a pre-coated fin material for heat exchangers having excellent corrosion resistance and hydrophilicity can be obtained by forming a water-resistant film and a hydrophilic film on the surface of the fin material. This has a remarkable effect.
第１図は本発明の一実施例による親水性の試験結果を示
す図である。FIG. 1 is a diagram showing the results of a hydrophilicity test according to an example of the present invention.
Claims (5)
、次いで正リン酸と高吸水性ポリマーを含むアルカリケ
イ酸塩水溶液を塗布し、しかる後加熱乾燥することを特
徴とするプレコートフィン材の製造方法。(1) A method for producing a precoated fin material, which comprises performing chromate treatment on the surface of an aluminum strip, then applying an aqueous alkali silicate solution containing orthophosphoric acid and a superabsorbent polymer, and then heating and drying. .
度１．５〜３．０ｗｔ％とし、温度２０〜５０℃で１０
秒〜５分間浸漬してＣｒの量を２０〜１５０ｍｇ／ｍ＾
２付着させることを特徴とする請求項１記載の熱交換器
用プレコートフィン材の製造方法。(2) Chromate treatment uses a chromate chromate forming agent at a concentration of 1.5 to 3.0 wt% and a temperature of 20 to 50°C.
Immerse for 2 to 5 minutes to reduce the amount of Cr to 20 to 150 mg/m^
2. The method for producing a precoated fin material for a heat exchanger according to claim 1, wherein the precoated fin material for a heat exchanger is made to adhere.
リチウム、ケイ酸カリをＳｉＯ＿２／Ｍ＿２Ｏ（Ｍはリ
チウム、ナトリウム、カリウムなどのアルカリ金属）で
表わす比が１以上のものを使用することを特徴とする請
求項１記載の熱交換器用プレコートフィン材の製造方法
。(3) For the aqueous alkali silicate solution, use one in which the ratio of sodium silicate, lithium silicate, and potassium silicate expressed as SiO_2/M_2O (M is an alkali metal such as lithium, sodium, or potassium) is 1 or more. A method for producing a precoated fin material for a heat exchanger according to claim 1.
ケイ酸塩中のアルカリ分の１〜１００％であることを特
徴とする請求項１記載の熱交換器用プレコートフィン材
の製造方法。(4) The method for producing a precoated fin material for a heat exchanger according to claim 1, wherein the concentration of orthophosphoric acid in the alkali silicate is 1 to 100% of the alkali content in the alkali silicate.
アルカサケイ酸塩１重量部に対して０．０１〜０．１重
量部であることを特徴とする請求項１記載の熱交換器用
プレコートフィン材の製造方法。(5) The precoat for a heat exchanger according to claim 1, wherein the concentration of the superabsorbent polymer in the alkali silicate is 0.01 to 0.1 part by weight per 1 part by weight of the alkali silicate. Method of manufacturing fin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19846388A JPH0247272A (en) | 1988-08-09 | 1988-08-09 | Production of precoated fin material for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19846388A JPH0247272A (en) | 1988-08-09 | 1988-08-09 | Production of precoated fin material for heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0247272A true JPH0247272A (en) | 1990-02-16 |
Family
ID=16391525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19846388A Pending JPH0247272A (en) | 1988-08-09 | 1988-08-09 | Production of precoated fin material for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0247272A (en) |
-
1988
- 1988-08-09 JP JP19846388A patent/JPH0247272A/en active Pending
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