JPS62272098A - Surface treatment of heat exchanger made of aluminum - Google Patents
Surface treatment of heat exchanger made of aluminumInfo
- Publication number
- JPS62272098A JPS62272098A JP3115187A JP3115187A JPS62272098A JP S62272098 A JPS62272098 A JP S62272098A JP 3115187 A JP3115187 A JP 3115187A JP 3115187 A JP3115187 A JP 3115187A JP S62272098 A JPS62272098 A JP S62272098A
- Authority
- JP
- Japan
- Prior art keywords
- film
- heat exchanger
- press
- aluminum
- water
- 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 33
- 238000004381 surface treatment Methods 0.000 title claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 30
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000010419 fine particle Substances 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 238000004080 punching Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 14
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 6
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims description 5
- 239000001263 FEMA 3042 Substances 0.000 claims description 5
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000000049 pigment Substances 0.000 claims description 5
- 229920002258 tannic acid Polymers 0.000 claims description 5
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims description 5
- 229940033123 tannic acid Drugs 0.000 claims description 5
- 235000015523 tannic acid Nutrition 0.000 claims description 5
- 239000004606 Fillers/Extenders Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 26
- 239000002245 particle Substances 0.000 abstract description 6
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 4
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 abstract description 2
- 125000005372 silanol group Chemical group 0.000 abstract description 2
- 229910020175 SiOH Inorganic materials 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000032683 aging Effects 0.000 abstract 1
- 230000003449 preventive effect Effects 0.000 abstract 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000004111 Potassium silicate Substances 0.000 description 4
- 239000008119 colloidal silica Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052913 potassium silicate Inorganic materials 0.000 description 4
- 235000019353 potassium silicate Nutrition 0.000 description 4
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005660 hydrophilic surface Effects 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- KBXUTBMGSKKPFL-UHFFFAOYSA-N 3-hydroxy-2-methylprop-2-enoic acid Chemical compound OC=C(C)C(O)=O KBXUTBMGSKKPFL-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 238000003462 Bender reaction Methods 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920006397 acrylic thermoplastic Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003869 coulometry Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920002587 poly(1,3-butadiene) polymer Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 239000002335 surface treatment layer Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
［産業上の利用分野］
本発明はアルミニウムもしくはアルミニウム合金にりな
る板材、特にプレコートアルミニウムコイル祠で形成さ
れるアルミニウム製熱交換器の表面処理方法に関するも
のである。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to surface treatment of a plate material made of aluminum or an aluminum alloy, particularly an aluminum heat exchanger formed of a pre-coated aluminum coil. It is about the method.
［従来技術］
一般にこの種のアルミニウム製熱交換器は白錆防止及び
親水性を付与するために表面処理がなされている。この
表面処理の例として、例えば実開昭５５−６００９７号
公報、及び本発明と同一出願人に係る特開昭５４−１４
２６５０号公報に開示されたものが公知である。前者の
実用新案の公開公報に開示されている考案は、フィン材
の表面に樹脂層が形成され、後者の特許の公開公報の発
明は多孔性シリカ微粒子を含有する樹脂皮膜が形成され
ている。そして、これ等考案及び発明の皮膜はいずれも
フィン材に対して一層の皮膜どして形成されている。[Prior Art] Generally, this type of aluminum heat exchanger is surface-treated to prevent white rust and to impart hydrophilicity. Examples of this surface treatment include, for example, Japanese Unexamined Utility Model Publication No. 55-60097, and Japanese Unexamined Patent Publication No. 54-14 filed by the same applicant as the present invention.
The one disclosed in Japanese Patent No. 2650 is known. The invention disclosed in the former utility model publication has a resin layer formed on the surface of the fin material, and the latter invention has a resin film containing porous silica particles. The coatings of these inventions and inventions are all formed as a single layer coating on the fin material.
［発明が解決しようとする問題点］
これら従来例における曲者のの皮膜処理は水濡れ性がほ
とんどなく、むしろ疎水性である。従って、冷房運転時
には大気中の水分がフィン間隙に凝集し、この凝集した
水は、フィン表面が疎水性面である程水滴になり易く、
且つフィン間隙で目詰りを起し、通風抵抗が増加して、
熱交換効率の低下を来たすと云う問題点を有している。[Problems to be Solved by the Invention] The film treatments of the benders in these conventional examples have almost no water wettability, and are rather hydrophobic. Therefore, during cooling operation, moisture in the atmosphere condenses in the fin gaps, and the more hydrophobic the fin surface is, the more likely this condensed water becomes water droplets.
In addition, clogging occurs in the fin gaps, increasing ventilation resistance.
This has the problem of reducing heat exchange efficiency.
又、後者の発明に係る樹脂皮膜は、多孔性のシリカ微粒
子を含有している点で、前者のものに比べて水濡れ性に
優れているが、それでも樹脂が一部において表面に露出
する関係で、その分だけ疎水性が付与されることになり
、実際の使用に関しては未だ充分な親水性とまでは達し
ていない。そして、特にシリカ微粒子等の無機質皮膜を
有するプレコートアルミニウム板は裁断もしくはプレス
打抜成型加工に際し、工具の摩滅が無処理のアルミニウ
ム板に比べて茗しく大きく、工具寿命を短くすると云う
問題点を有している。In addition, the resin film according to the latter invention has better water wettability than the former because it contains porous silica particles, but it still has a problem in that the resin is partially exposed on the surface. Therefore, hydrophobicity is imparted by that amount, and it has not yet reached the level of sufficient hydrophilicity for actual use. In particular, when pre-coated aluminum sheets with an inorganic coating such as silica particles are cut or press punched, tool wear is much greater than with untreated aluminum sheets, which shortens tool life. are doing.
本発明はこれらの欠点を除去するためになされたもので
あって、その目的はアルミニウム製熱交換におけるフィ
ン表面の白錆防止と水濡れ性を向上させると共に裁断、
プレス打抜加工時の工具摩耗を低減したアルミニウム製
熱交換器の表面処理方法を提供しようとするものである
。The present invention was made to eliminate these drawbacks, and its purpose is to prevent white rust on the fin surface in aluminum heat exchangers, improve water wettability, and improve cutting, cutting, and water wettability.
The present invention aims to provide a surface treatment method for aluminum heat exchangers that reduces tool wear during press punching.
［問題点を解決するための手段］
前記問題点を解決するだめの具体的手段とじて本発明は
、表面に体質顔料を含有しない樹脂皮膜を施した熱交換
器用アルミニウムフィン板材を裁断およびプレス打抜成
型加工した後、シリカ微粒子で表面処理することを特徴
とするアルミニウム熱交換器の表面処理方法で有り、更
に前記樹脂皮膜として、タンニン酸を含有するウレタン
樹脂溶液で皮膜を形成させることも含むアルミニウム熱
交換器の表面処理方法を提供するものである。そして、
アルミニウム製熱交換器用アルミニウムコイル材を耐食
性を有するコロイダルシリカ、硅酸塩、炭酸カルシウム
などの無機塩顔料を含有しない樹脂でコーテングした所
謂ブレツー１〜材を裁断、プレス打抜成型加工した後、
コロイダルシリカＪを塗布することによって親水性を大
にすると共に工具摩耗を低減させ、且つ耐食性に優れた
皮膜を形成させる処理方法である。[Means for Solving the Problems] As a specific means for solving the above-mentioned problems, the present invention involves cutting and pressing an aluminum fin plate material for a heat exchanger whose surface is coated with a resin film containing no extender pigment. A surface treatment method for an aluminum heat exchanger, which comprises performing a surface treatment with silica fine particles after stamping, and further includes forming a film with a urethane resin solution containing tannic acid as the resin film. A method for surface treatment of an aluminum heat exchanger is provided. and,
After cutting and press punching the so-called Bretsu 1~ material, which is made by coating aluminum coil material for aluminum heat exchangers with a resin that does not contain inorganic salt pigments such as colloidal silica, silicate, and calcium carbonate, which has corrosion resistance,
This treatment method increases hydrophilicity by coating colloidal silica J, reduces tool wear, and forms a film with excellent corrosion resistance.
［工程及び組成の説明］
本発明をアルミニウム製熱交換器の製造工程から説明す
ると、樹脂コーテングを施したプレコート材を裁断、プ
レス打抜成型加工した後、銅バイブなどを溶接した熱交
換器の組立品をトリクレン洗浄し、次いで水にＥａして
漏れテストを行う工程に於いて、水の代りにシリカ微粒
子を含有する水溶液を用い、その後の水切り乾燥工程で
乾燥することによって、皮膜を形成させることが出来る
。[Description of process and composition] To explain the present invention from the manufacturing process of an aluminum heat exchanger, a pre-coated material coated with a resin is cut, press stamped and formed, and then a copper vibrator etc. is welded to the heat exchanger. In the process of cleaning the assembled product with Triclean, then Ea in water to perform a leak test, an aqueous solution containing silica particles is used instead of water, and a film is formed by drying in the subsequent draining and drying process. I can do it.
本発明の処理方法に用いるコロイダルシリカ、硅酸塩お
よび炭酸カルシウムなどの無機顔料を含有しない樹脂コ
ーテング剤に用いる樹脂皮膜としては、現在工業化市販
されている有機高分子樹脂のほとんどが使用可能であり
、酢酸ビニル、塩化ビニル、塩化ビニリデン等のビニル
系およびその共重合体、アクリル酸、メタクリル酸、ア
クリル酸エステル、メタクリル酸エステル、とドロキシ
アクリル酸、ヒドロキシメタクリル酸等のアクリル系お
よびその共重合体、アルキッド系、エポキシ系、フッ素
系、ウレタン系、ポリエステル系、スヂレン系、オレフ
ィン系、およびそれらの共重合体、ブタジェン等の合成
ゴム系、および天然高分子系が用いられる。As the resin film used in the resin coating agent that does not contain inorganic pigments such as colloidal silica, silicate, and calcium carbonate used in the treatment method of the present invention, most of the organic polymer resins that are currently commercially available can be used. , vinyl acetate, vinyl chloride, vinylidene chloride, etc. and their copolymers; acrylic acid, methacrylic acid, acrylic esters, methacrylic acid esters, acrylics such as droxyacrylic acid, hydroxymethacrylic acid, and their copolymers. Polymers, alkyds, epoxys, fluorine, urethanes, polyesters, styrenes, olefins, copolymers thereof, synthetic rubbers such as butadiene, and natural polymers are used.
有機高分子樹脂の分子量は１ 、０００以上が好ましく
、１，０００以下の場合には、皮膜形成時に酸化重合あ
るいは架橋反応によって水に不溶化の皮膜を形成するも
のを選択する必要がある。また、アルミニウム製熱交換
器の製造工程において、トリクレン洗浄工程がある場合
には、トリクレンに溶解し難い樹脂を選ぶ必要がある。The molecular weight of the organic polymer resin is preferably 1,000 or more, and if it is less than 1,000, it is necessary to select one that forms a film that is insolubilized in water by oxidative polymerization or crosslinking reaction during film formation. Further, in the manufacturing process of an aluminum heat exchanger, if there is a trichlene cleaning step, it is necessary to select a resin that is difficult to dissolve in trichlene.
又、本発明では、熱交換器に用いるためアルミニウムお
よびその合金表面に対して、薄膜で耐食性の良い樹脂皮
膜を形成するものから選択する必要がある。熱交換器に
用いる皮膜厚は出来る限り薄い方が望ましく、通常は１
０ミクロン以下であり、最適には２ミクロン以下が望ま
しい。Further, in the present invention, since it is used in a heat exchanger, it is necessary to select a material that forms a thin resin film with good corrosion resistance on the surface of aluminum and its alloy. It is desirable that the film used for heat exchangers be as thin as possible, and usually 1
It is preferably 0 microns or less, and optimally 2 microns or less.
これらの要求に最も適した樹脂皮膜は、ウレタン樹脂並
に、エポキシ系樹脂であり、さらにプレコート処理の作
業性面から、水系ウレタン樹脂に反応促進剤としてタン
ニン酸を添加した樹脂皮膜組成液を使用することによっ
て、比較的低温で且つ短時間で良好な皮膜を得ることが
出来る。又、さらにコロイダルシリカを塗布する場合に
おいても、タンニン酸のため、濡れ性が良く、均一な皮
膜を形成させることが出来る。The most suitable resin film to meet these requirements is urethane resin as well as epoxy resin.Furthermore, in terms of workability during pre-coat treatment, a resin film composition solution made by adding tannic acid as a reaction accelerator to water-based urethane resin is used. By doing so, a good film can be obtained at a relatively low temperature and in a short time. Furthermore, even when colloidal silica is applied, it has good wettability and can form a uniform film because it is made of tannic acid.
樹脂皮膜を着色する目的に際しては、カーボンブラック
、フタロシアニン系顔料など、アルミニウム材の裁断、
プレス加工時の工具摩耗に影響をおよぼさない範囲で用
いることが出来る。For the purpose of coloring the resin film, cutting of aluminum materials, carbon black, phthalocyanine pigments, etc.
It can be used as long as it does not affect tool wear during press working.
又、裁断、プレス成型加工後に用いるシリカ微粒子とし
ては、水に溶解しない高分子量の無水硅酸粒子で、１〜
１００ミリミクロン程度の粒子径を有するものが良好で
ある。In addition, the silica fine particles used after cutting and press molding are high molecular weight silicic acid anhydride particles that do not dissolve in water.
Those having a particle size of about 100 millimicrons are preferable.
シリカ微粒子を塗布する方法は、粉末の状態で塗布する
方法、トリクレン浴槽に分散させ、トリクレン脱脂洗浄
と同時に付着さける方法、並に樹脂などの貼着効果を有
するバインダーに分散させた溶液をスプレーなどて塗布
する方法などがあるが、最適には、アルミニウム製熱交
換器の水浸漬による漏水試験槽の水の代わりに、水に分
散さぼたシリカ微粒子の水溶液に、成型した熱交換器を
浸漬し、漏れテストと同時に、シリカ微粒子水溶液を付
着させ、その後の水切り乾燥工程において乾燥させ強固
な親水性面を形成させる方法である。There are several ways to apply silica particles, such as applying them in powder form, dispersing them in a Tri-Clean bath and avoiding adhesion at the same time as Tri-Clean degreasing, and spraying a solution dispersed in a binder such as a resin that has an adhesion effect. However, the most suitable method is to immerse the molded heat exchanger in an aqueous solution of sabota silica particles dispersed in water instead of the water in the leak test tank by immersing the aluminum heat exchanger in water. This is a method in which an aqueous solution of silica particles is applied at the same time as the leak test, and then dried in the subsequent draining and drying process to form a strong hydrophilic surface.
シリカ微粒子は、その表面にシラノール基（−８ｉ Ｏ
Ｈ）を持っており、水中では解離し、負荷電を持ち、安
定状態に分散している。この懸濁水溶液を耐食性を有す
る皮膜上に塗布し乾燥することによって珪酸粒子が皮膜
表面で固着したりｌｔＩＭ粒子が相互に会合し、凝集し
て皮膜を形成する。一度固着もしくｔま凝集した珪酸粒
子は再分散し雑く、皮膜表面から脱落しなくなり、従っ
て経時変化に対し、持続性を有する皮膜が形成され゛る
。Silica fine particles have silanol groups (-8i O
H), dissociates in water, has a negative charge, and is dispersed in a stable state. When this aqueous suspension solution is applied onto a corrosion-resistant film and dried, the silicic acid particles stick to the surface of the film, and the ltIM particles associate with each other and aggregate to form a film. Once fixed or aggregated, the silicic acid particles are redispersed and do not fall off the surface of the coating, thus forming a coating that is durable against changes over time.
シリカ微粒子を分散させた水溶液にさらに低分子ケイ酸
塩、例えば、ケイ酸ソーダ、ケイ酸カリ、ケイ酸リチウ
ムなどシリカ微粒子に対して５〜５０％を用いることに
よってより良好な皮膜を形成することが出来る。A better film can be formed by further using a low molecular weight silicate such as sodium silicate, potassium silicate, lithium silicate, etc. in an amount of 5 to 50% based on the silica particles in an aqueous solution in which fine silica particles are dispersed. I can do it.
本発明によるシリカ微粒子の塗布量は親水性の要求度合
によって異なるが、０．０１〜５９／況程度が良好であ
る。シリカ微粒子の付Ｗｆｆｉが０゜０１ｇ／ｍ以下で
あると十分な親水性面が得られ難く、５９／ＴＩＬ以上
では経済的に不利である。The coating amount of the silica fine particles according to the present invention varies depending on the required degree of hydrophilicity, but is preferably about 0.01 to 59/cm. If the Wffi of the silica fine particles is less than 0°01 g/m, it is difficult to obtain a sufficiently hydrophilic surface, and if it is more than 59/TIL, it is economically disadvantageous.
［実施例］
次に本発明の方法を幾つかの実施例を挙げ、且つ幾つか
の比較例と比較して詳しく説明する。[Examples] Next, the method of the present invention will be described in detail by giving some examples and comparing with some comparative examples.
実施例１
脱脂、洗浄したアルミニウム材（Ａ １１００，０．１
４舖厚）に熱硬化性ウレタン樹脂（登録商標エラストロ
ンＥ−３７、第一工業製薬）１００重ω部、硬化触！（
登録商標エラストロンキャタリスト３２、第−工！Ｊ、
顎桑）３重量部、フタロシアニン系顔料く登録商標６Ｍ
ブルー２Ｇ、東洋インキ製造）１電量部を８９７重量部
の脱イオン水で希釈調整した液を約１５ｇ／尻塗布した
後、熱風循環式オーブンで１６０℃３分焼付し、後０．
３〜０．４ｇ／ｍｌの皮膜厚のプレコートアルミニウム
板を作製した。この皮膜の耐アセトン払拭テストでは１
〜３回で剥離した。Example 1 Degreased and cleaned aluminum material (A 1100, 0.1
4 thick), thermosetting urethane resin (registered trademark Elastron E-37, Daiichi Kogyo Seiyaku), 100 parts by weight, and hardened! (
Registered trademark Elastron Catalyst 32, No. 1! J.
Mulberry) 3 parts by weight, Phthalocyanine pigment registered trademark 6M
Blue 2G, produced by Toyo Ink) 1 coulometric part was diluted with 897 parts by weight of deionized water, and approximately 15 g of the solution was applied on the butt, and baked in a hot air circulation oven at 160°C for 3 minutes, and after 0.5 g of the solution was applied.
A precoated aluminum plate with a film thickness of 3 to 0.4 g/ml was prepared. In the acetone wiping resistance test of this film, 1
It peeled off after ~3 times.
このようにして形成したプレコートアルミニウム板をプ
レス加工油を塗布し成型加工を行い、銅パイプを組込み
アルミニウム製熱交換器を組立てた完成品をトリクレン
にて脱脂洗浄した後シリカ微粒子水溶液（登録商標スノ
ーテックスＣ１日産化学）２００重量部、並にケイ酸カ
リ１０重量部を７９０重量部の水道水に希釈した浴槽に
浸漬し、アルミニウム製熱交換器の銅バイブ溶接部など
の漏れテストと同時に浸漬塗布し、熱風循環式オーブン
で１３０℃２０分乾燥を行い、ケイ酸カリを含有するシ
リカ皮膜的０．３〜０．４９７屁を形成させた。The thus formed pre-coated aluminum plate is coated with press processing oil and molded, and the finished product, in which copper pipes are incorporated and an aluminum heat exchanger is assembled, is degreased and cleaned with Triclean, followed by a silica fine particle aqueous solution (registered trademark Snow). Tex C1 (Nissan Chemical) 200 parts by weight, and 10 parts by weight of potassium silicate were diluted in 790 parts by weight of tap water and immersed in a bathtub, and applied at the same time as a leak test on copper vibe welds of aluminum heat exchangers. Then, it was dried in a hot air circulation oven at 130°C for 20 minutes to form a 0.3 to 0.497 fart silica film containing potassium silicate.
シリカ皮膜を形成させたアルミニウムフィン表面は、先
のプレス油とは全く無関係であるため水濡れ性に富み、
水の接触角は１０度以下であった。又、塩水噴霧試験に
供した結束約２４０時間、白錆の発生が認められなかっ
た。The surface of the aluminum fin on which the silica film is formed has no relation to the previous press oil, so it has excellent water wettability.
The water contact angle was 10 degrees or less. Furthermore, no white rust was observed during the 240 hours the bundle was subjected to the salt spray test.
実施例２
実施例１の（０生触媒３重量部の代わりに、タンニン酸
を１６重４部を用いた実施例１ど同一の素材、薬剤調整
液並に方法で作製した約０．３〜０．４９／ゴの樹脂皮
膜の耐アセトン払拭テストで、皮膜が剥離するまで約３
０回を要し、実施例１で得られる皮膜に比べ、優れてい
た。Example 2 Approximately 0.3 ~ 0.3~ prepared using the same materials, drug preparation solution, and method as in Example 1 except that 4 parts by weight of tannic acid was used in place of 3 parts by weight of the raw catalyst (0.3~ In the acetone wiping test of the resin film of 0.49/go, it took about 30 minutes until the film peeled off.
0 times were required, which was superior to the film obtained in Example 1.
比較例１
実施例１と同様の累月、薬品、並に方法で、０３〜０．
４ｇ／Ｔｄのウレタン樹脂皮膜を形成させた侵、ざらに
、シリカ微粒子分散水溶液（登録商標スノーテックスＣ
１８産化学） ２ＱＯｉ吊部、ケイ酸カリ２０都合部
を７８０重量部の水道水で希釈した処理液をロールコー
ト法で塗布した後、熱風循環式オーブンで１３０℃３分
乾燥し、シリカ皮膜を約０．３〜０．４ｙ／Ｔｄ、形成
させた後プレス加工油を塗布し、プレス成型加工を行っ
た結果、ダイス並にポンチの工具摩耗が激しく、実施例
１に較べ、工具寿命が約１／３〜１／４であった。Comparative Example 1 Using the same period, chemicals, and method as in Example 1, 03 to 0.
A 4g/Td urethane resin film is formed on the silica fine particle dispersion aqueous solution (registered trademark Snowtex C).
After applying a treatment solution prepared by diluting 20 parts of potassium silicate with 780 parts by weight of tap water to the 2QOi hanging part using a roll coating method, it was dried in a hot air circulation oven at 130°C for 3 minutes to form a silica film. Approximately 0.3 to 0.4y/Td, after forming, applying press working oil and performing press forming, the tool wear of the punch as well as the die was severe, and compared to Example 1, the tool life was approximately It was 1/3 to 1/4.
実施例３
エチレン−アクリル酸共重合体樹脂２２０ｔ、Ｊ、２８
％アンモニア水４３ｇ、脱イオン水７３７ｇを４．５に
９７ｃｍ、 １３０℃にぢち、約１時間撹拌しながら
、水に可溶化した後席ＩＪｌ ｌ、、ざらに２８％アン
モニア水でｐＨ９，５±０．５に調整した樹脂固形分濃
度２２％の樹脂水溶液を作り、この樹脂溶液を１ｏ％ａ
度に脱イオン水で希釈して得た水溶液に脱脂、洗浄した
アルミニウムコイルに塗布した後、熱風雰囲気１３０°
Ｃで約３０秒乾燥し、約１．０９７尻の耐食性皮膜を形
成させた後実施例１と同様にプレス成型加工、トリクレ
ン洗浄し、シリカ微粒子（登録商標スノーテックスＣ１
８産化学）２００重量部を水道水８００重量部で希釈し
た浴槽に浸漬し、アルミニウム製熱交換器の濡れテスト
と同時にシリカ微粒子分散水溶液を塗布し、次いで乾燥
することによって、水濡れ性が優れた接触角１０度以下
の皮膜を得た。又、塩水噴霧試験による耐食性能は約３
００時間で白錆の発生は認められなかった。Example 3 Ethylene-acrylic acid copolymer resin 220t, J, 28
43 g of % ammonia water and 737 g of deionized water were heated to 4.5 97 cm, heated to 130°C, and stirred for about 1 hour. Prepare a resin aqueous solution with a resin solid content concentration of 22% adjusted to ±0.5, and add this resin solution to 10% a
After applying the aqueous solution diluted with deionized water to a degreased and cleaned aluminum coil, the hot air atmosphere was applied at 130°C.
C for about 30 seconds to form a corrosion-resistant film with a thickness of about 1.097 cm, followed by press molding in the same manner as in Example 1, washing with trichlene, and applying silica fine particles (registered trademark Snowtex C1).
Excellent water wettability was achieved by immersing 200 parts by weight of 800 parts by weight of 800 parts by weight of tap water in a bathtub diluted with 800 parts by weight of tap water, applying an aqueous solution of silica fine particle dispersion at the same time as the wettability test of the aluminum heat exchanger, and then drying. A film with a contact angle of 10 degrees or less was obtained. In addition, the corrosion resistance performance in the salt spray test is approximately 3
No white rust was observed after 00 hours.
比較例２
実施例３と同様の素材、薬品並に方法で、約１、Ｊ７７
尻の樹脂皮膜を形成させた後さらにシリカ微粒子分散水
溶液（登録商標スノーテックスＣ日産化学）２００重吊
都合８００重世部の水道水で希釈したｌｉ！１埋液をロ
ールコートで塗布した後熱風循環式オーブンで１３０℃
３分乾燥し、シリカ皮膜を約０．７ｇ／尻形酸形成た後
、プレス加工油を塗布し、プレス成型加工を行った結果
、ダイス並にポンチの工具摩耗が激し〈実施例１に較べ
、工具ステ命が約１１５であり、さらにトリクレン洗浄
後であっても、プレス油が完全に除去できないため水濡
れ性は低下し、接触角は３０〜６０度となった。Comparative Example 2 Using the same materials, chemicals, and method as in Example 3, about 1, J77
After forming the resin film on the butt, a silica fine particle dispersion aqueous solution (registered trademark Snowtex C Nissan Chemical) was diluted with tap water of 200 times the weight and 800 times the weight. 1. After applying the filling liquid with a roll coat, heat it in a hot air circulation oven at 130℃.
After drying for 3 minutes and forming a silica film of approximately 0.7 g/bottom acid, press processing oil was applied and press molding was performed.As a result, tool wear of the punch was as severe as that of the die. In comparison, the tool life was about 115, and even after cleaning with trichlorethylene, the press oil could not be completely removed, so the water wettability decreased and the contact angle was 30 to 60 degrees.
「発明の効果」
以上説明したように、本発明に係るアルミニウム製熱交
換器の表面処理方法は、先に樹脂皮膜を形成することで
プレス成型加工等を行っても、ダイス並にポンチの工具
摩耗が著しく減少し、工具の使用寿命が長くなると共に
、加工性が向上づると云う漫れた効果を秦する。"Effects of the Invention" As explained above, the surface treatment method for an aluminum heat exchanger according to the present invention can be applied with a die or punch tool even if press molding is performed by forming a resin film first. This has the following effects: wear is significantly reduced, the service life of the tool is extended, and machinability is improved.
更に、樹脂皮膜の上にシリカ微粒子の表面処理層を形成
することで、従来の樹脂とシリカ微粒子どの混合樹脂皮
膜に比べて遥かに親水性に優れ、フィン間に水滴が溜ま
ることがなくなると云う浸れた効果も秦する。Furthermore, by forming a surface treatment layer of silica particles on top of the resin film, it is far more hydrophilic than conventional mixed resin films with resin and silica particles, and water droplets do not accumulate between the fins. The soaked effect also makes Qin.
特許出願人 日本パー力ライジング株式会社パつ
代 叩 人 秋 元 輝
ｋＭも）手続ネｌ″１１正書
昭和６２年３月７２日Patent Applicant: Japan Parriki Rising Co., Ltd. Patsuyo: Teru Akimoto
kM also) Procedures Nel''11 Official Book March 72, 1986
Claims (2)
交換器用アルミニウムフイン板材を裁断およびプレス打
抜成型加工した後、シリカ微粒子で表面処理することを
特徴とするアルミニウム熱交換器の表面処理方法。(1) Surface treatment of an aluminum heat exchanger characterized by cutting and press punching molding an aluminum fin board material for a heat exchanger whose surface is coated with a resin film containing no extender pigment, and then surface-treated with silica fine particles. Method.
皮膜を形成させた熱交換器用アルミニウムフイン板材を
裁断およびプレス打抜成型加工した後、シリカ微粒子で
表面処理することを特徴とするアルミニウム熱交換器の
表面処理方法。(2) An aluminum heat exchanger characterized by cutting and press punching forming an aluminum fin plate material for a heat exchanger on which a film is formed with a urethane resin solution containing tannic acid on the surface, and then surface-treating it with silica fine particles. How to treat the surface of the vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3115187A JPS62272098A (en) | 1987-02-13 | 1987-02-13 | Surface treatment of heat exchanger made of aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3115187A JPS62272098A (en) | 1987-02-13 | 1987-02-13 | Surface treatment of heat exchanger made of aluminum |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16521482A Division JPS5956097A (en) | 1982-09-22 | 1982-09-22 | Surface treatment for heat exchanger made of aluminum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62272098A true JPS62272098A (en) | 1987-11-26 |
Family
ID=12323436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3115187A Pending JPS62272098A (en) | 1987-02-13 | 1987-02-13 | Surface treatment of heat exchanger made of aluminum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62272098A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03279792A (en) * | 1990-02-20 | 1991-12-10 | Kobe Steel Ltd | Aluminum fin material for heat exchanger having superior formability |
| US7493941B2 (en) * | 2002-04-10 | 2009-02-24 | Daikin Industries, Ltd. | Surface treatment method for plate material, and radiating fin for heat exchanger |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54142650A (en) * | 1978-04-28 | 1979-11-07 | Nippon Packaging Kk | Surface treatment method of heat exchanger in aluminium |
-
1987
- 1987-02-13 JP JP3115187A patent/JPS62272098A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54142650A (en) * | 1978-04-28 | 1979-11-07 | Nippon Packaging Kk | Surface treatment method of heat exchanger in aluminium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03279792A (en) * | 1990-02-20 | 1991-12-10 | Kobe Steel Ltd | Aluminum fin material for heat exchanger having superior formability |
| US7493941B2 (en) * | 2002-04-10 | 2009-02-24 | Daikin Industries, Ltd. | Surface treatment method for plate material, and radiating fin for heat exchanger |
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