JPS6316220B2 - - Google Patents
Info
- Publication number
- JPS6316220B2 JPS6316220B2 JP53106882A JP10688278A JPS6316220B2 JP S6316220 B2 JPS6316220 B2 JP S6316220B2 JP 53106882 A JP53106882 A JP 53106882A JP 10688278 A JP10688278 A JP 10688278A JP S6316220 B2 JPS6316220 B2 JP S6316220B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- brazing
- brazed
- flux
- cleaning
- 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
Links
- 229910052782 aluminium Inorganic materials 0.000 claims description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 29
- 230000004907 flux Effects 0.000 claims description 29
- 238000005219 brazing Methods 0.000 claims description 27
- 238000004140 cleaning Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 229910000838 Al alloy Inorganic materials 0.000 claims description 12
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 150000002222 fluorine compounds Chemical class 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 229910001504 inorganic chloride Inorganic materials 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229910001506 inorganic fluoride Inorganic materials 0.000 claims 2
- 230000007797 corrosion Effects 0.000 description 29
- 238000005260 corrosion Methods 0.000 description 29
- 238000002474 experimental method Methods 0.000 description 15
- 238000011282 treatment Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000003472 neutralizing effect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009972 noncorrosive effect Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
Description
〔産業上の利用分野〕
本発明はろう付けに用いる弱酸性フラツクスを
除去するフラツクス除去剤およびこれを用いた、
ろう付け後処理洗浄方法、特に、弱酸性フラツク
スを用いたろう付け部品の耐食性を向上するため
に行われる洗浄方法とその除去剤に関する。
〔従来の技術〕
一般に被処理物として用いられる両性金属特に
アルミニウム及びアルミニウム合金は酸化されや
すく、その表面層の酸化膜はち密で融点が高く、
おかされにくい性質を有しているため、他の金属
によるろう付け、例えば銀ろう付けや黄銅ろう付
け等とくらべアルミニウムろう付けは困難とされ
ている。また、ろう付けのポイントの一つにろう
付け前の母材の清浄化があり、一般には、フラツ
クスを用い、化学的に母材表面を活性化してい
る。従つて、これ等強固な表面酸化膜を有するア
ルミニウム及びアルミニウム合金のろう付け用フ
ラツクスとしては無機系の塩化物、ふつ化物等が
使用される事が多かつた。
第１表に市販の12種類のろう付け用フラツクス
の成分例を示すが、いづれのフラツクスも酸性又
は弱酸性であり、腐食性が強くろう付け後出来る
だけ早く残留フラツクスの除去が必要とされてい
た。
[Industrial Application Field] The present invention relates to a flux removing agent for removing weakly acidic flux used in brazing, and a flux removing agent using the same.
The present invention relates to a post-brazing cleaning method, and in particular to a cleaning method using weakly acidic flux to improve the corrosion resistance of brazed parts, and a removal agent therefor. [Prior Art] Amphoteric metals, especially aluminum and aluminum alloys, which are generally used as objects to be treated, are easily oxidized, and the oxide film on their surface layer is dense and has a high melting point.
Due to its property of being difficult to damage, aluminum brazing is considered more difficult than brazing with other metals, such as silver brazing and brass brazing. Also, one of the important points in brazing is cleaning the base material before brazing, and generally, flux is used to chemically activate the surface of the base material. Therefore, inorganic chlorides, fluorides, etc. have often been used as fluxes for brazing aluminum and aluminum alloys having strong surface oxide films. Table 1 shows examples of the composition of 12 types of commercially available brazing fluxes. All fluxes are acidic or weakly acidic and highly corrosive, so it is necessary to remove residual flux as soon as possible after brazing. Ta.
【表】
一方、アルミニウム及びアルミニウム合金のろ
う付けは、ろうの流れが十分でない事が多く、特
に第１図ａに示す様なマイクロ波通信機器に使用
するアルミニウム製の導波管を作成する場合、断
面図ｂ、拡大図ｃに示すようにアルミニウム管１
とアルミニウム管２あるいはフランジ３の接合部
分４，４′の中央部５はろうが流れない場合が多
く、さらに継手管内の余剰のろう付け部分６を削
りとつて使用する場合、ろう付けがなされていな
いすきま７が発生しこのすきまに残留しているフ
ラツクスが時間の経過と共にアルミニウム母材を
おかし腐食が進行する。また、第２図に示す様な
ろう付部８のピンホール９等でも同様な腐食が発
生する。この腐食は、ろう付け後処理の残留フラ
ツクス除去が不十分であつた事から生じるもので
ある。
一般に、これ等残留フラツクスの除去方法とし
ては機械的洗浄と化学的洗浄があり、両者の併用
が最も好ましいとされている。機械的洗浄はブラ
シによつてこする方法であり、化学的洗浄は、第
２表に示す薬品中浸漬により残留フラツクスの除
去をはかるものである。[Table] On the other hand, when brazing aluminum and aluminum alloys, the flow of the solder is often insufficient, especially when creating aluminum waveguides used in microwave communication equipment as shown in Figure 1a. As shown in , cross-sectional view b, and enlarged view c, the aluminum tube 1
In many cases, the solder does not flow through the center part 5 of the joint part 4, 4' between the aluminum pipe 2 or the flange 3, and furthermore, if the excess brazed part 6 in the joint pipe is scraped off for use, the solder may not have been brazed. A gap 7 is formed, and the flux remaining in this gap damages the aluminum base material over time, causing corrosion to progress. Further, similar corrosion occurs in pinholes 9 and the like in the brazed portion 8 as shown in FIG. This corrosion is caused by insufficient removal of residual flux during post-brazing treatment. Generally, methods for removing these residual fluxes include mechanical cleaning and chemical cleaning, and a combination of both is said to be most preferable. Mechanical cleaning is a method of scrubbing with a brush, and chemical cleaning is a method of removing residual flux by immersion in chemicals shown in Table 2.
【表】【table】
従来これを微少すきまやピンホールに残留した
フラツクスは、機械的に除去する、すきま、
ピンホールを埋め酸素の供給を遮断し、腐食の成
長をストツプする、ろう付け継手構造を変更
し、すきまの出来ない様な構造にする、等の方法
により耐食性の向上が行われていたが、これ等の
方法はいずれも時間がかかり高価になる、ろ
う付け部の信頼性に不安が残る、等の問題点を残
していた。このため、アルミニウム及びアルミニ
ウム合金のろう付けにおいては微少なすきまやピ
ンホールに残留したフラツクスまたは除去薬品等
によりろう付け部の耐食性が著しく劣化し、精密
な電子部品の信頼性を著しく低下していた。
〔問題点を解決するための手段〕
本発明は、以上述べたようにアルミニウムおよ
びアルミニウム合金等のろう付け部品のすきまや
ピンホール中に残留したフラツクスによる腐食の
発生を除くために、ろう付け後処理洗浄方法とし
て酸又はアルカリ系残留フラツクス除去薬品を使
用せずにフラツクス自体を中和させ、しかも中和
液がアルミニウム及びアルミニウム合金に対し非
腐食性であるメタケイ酸ソーダを添加したPH８な
いしPH10.5の水溶液からなるフラツクス除去剤の
湯浴によつて後処理をするものである。
〔作用〕
従つてろう付け後外部に残留するフラツクスが
除去できると同時に微少すきまやピンホールに残
留するフラツクスは中和されアルミニウム及びア
ルミニウム合金に対し、非腐食性の残渣物となり
ろう付部の耐食性を著しく向上させる事ができ電
子部品における精密部位のアルミニウムろう付け
を可能とすることを特徴とし、その目的は電子部
品の精密部位におけるろう付け個所の耐食性を向
上させる事にある。
〔実施例〕
ろう付け後の耐食性を著しく阻害するものとし
て、残留フラツクス、洗浄液残渣物、長時
間の湯先または湯中浸漬によるアルミニウム表面
の黒変、等がある事はすでに述べた通りである。
以下本発明による実施例を実験結果に従つて述
べる。実験ないし実験は、本発明の実施例の
効果を対比させるための参考実験である。
〔実験〕
実験は、従来のろう付け後処理洗浄方法を施
したアルミニウムろう付け部品の耐食性を調べる
ための実験である。
従来のろう付け後処理洗浄方法として第３表に
示したように、
(a) アルカリ脱脂、酸洗、水洗を行う一般的洗浄
を行う場合、
(b) (a)の工程後に活性剤洗浄、超音波水洗等を併
用して十分に洗浄を行つた場合の２つの例を採
り上げ、それぞれの洗浄を施したアルミニウム
ろう付け部品の耐食性の差異を、２種類の環境
試験によつて調べた。
なお、実験結果として表す耐食性の差異は、
環境試験を施した後のアルミニウムろう付け部
品表面の腐食状態を観察して、次の４段階にラ
ンク付けし評価基準としている。他の実験も同
じである。
Ａ：腐食が認められない。Ｂ：ろう付け部分
が黒変している。Ｃ：ろう付け部分に腐食物の
盛り上がりが見られる。Ｄ：ろう付け部分に多
量又は数点以上の腐食物の盛り上がりがあり、
明らかにＣより腐食程度が著しいと認められ
る。
したがつて、Ａに近いほど耐食性が良好で、
Ｄに近いほど耐食性が不良ということになる。
Conventionally, the flux remaining in minute gaps and pinholes is mechanically removed, gaps,
Corrosion resistance has been improved by filling pinholes and cutting off the oxygen supply to stop corrosion growth, and by changing the brazed joint structure to create a structure that eliminates gaps. All of these methods have problems such as being time consuming and expensive, and leaving concerns about the reliability of the brazed portion. For this reason, when brazing aluminum and aluminum alloys, residual flux or removal chemicals in minute gaps and pinholes significantly deteriorate the corrosion resistance of the brazed parts, significantly reducing the reliability of precision electronic components. . [Means for Solving the Problems] As described above, the present invention aims at eliminating corrosion caused by flux remaining in gaps and pinholes of parts to be brazed such as aluminum and aluminum alloys after brazing. As a treatment and cleaning method, the flux itself is neutralized without using acid or alkaline residual flux removal chemicals, and the neutralizing solution is PH8 to PH10 with the addition of sodium metasilicate, which is non-corrosive to aluminum and aluminum alloys. Post-treatment is performed using a hot water bath with a flux remover consisting of an aqueous solution of step 5. [Function] Therefore, the flux remaining outside after brazing can be removed, and at the same time, the flux remaining in minute gaps and pinholes is neutralized and becomes a non-corrosive residue for aluminum and aluminum alloys, improving the corrosion resistance of the brazed part. It is characterized by significantly improving the corrosion resistance and enables aluminum brazing of precision parts of electronic parts, and its purpose is to improve the corrosion resistance of the parts to be brazed in precision parts of electronic parts. [Example] As already mentioned, there are things that significantly impede corrosion resistance after brazing, such as residual flux, cleaning solution residue, and blackening of the aluminum surface due to long-term immersion in hot water or hot water. . Examples according to the present invention will be described below according to experimental results. The experiments are reference experiments for comparing the effects of the embodiments of the present invention. [Experiment] The experiment was conducted to investigate the corrosion resistance of aluminum brazed parts subjected to a conventional post-brazing cleaning method. As shown in Table 3, conventional post-brazing cleaning methods include: (a) when performing general cleaning including alkaline degreasing, pickling, and water washing, (b) after step (a), activator cleaning, Two examples were taken where thorough cleaning was performed using ultrasonic water cleaning, etc., and the difference in corrosion resistance of aluminum brazed parts after each cleaning was investigated through two types of environmental tests. The difference in corrosion resistance expressed as the experimental results is
The corrosion state of the surface of the aluminum brazed parts after the environmental test is observed and ranked in the following four stages as an evaluation standard. The same goes for other experiments. A: No corrosion observed. B: The brazed part has turned black. C: A buildup of corrosive matter is seen in the brazed portion. D: There is a large amount or several points of corrosive build-up in the brazed area,
It is clearly recognized that the degree of corrosion is more significant than that of C. Therefore, the closer it is to A, the better the corrosion resistance.
The closer it is to D, the poorer the corrosion resistance.
実験は微少すきまやピンホール等にたまつた
処理液の残留をなくすために水置換剤を用いた場
合及び沸騰水中で十分に後処理洗浄した場合のア
ルミニウムろう付け部品の耐食性を比較した結果
を示す。
第４表に処理液の残留をなくすために水置換剤
又は沸騰水を用いて後処理洗浄した場合の例を示
すが、水置換剤の効果はほとんどあらわれず沸騰
水による洗浄の方がより効果的である事が分つ
た。しかし、温度60℃、湿度90％RH中12日間の
温湿度試験で20〜30％のものに腐食が認められ
た。
The experiment compared the corrosion resistance of aluminum brazed parts when a water displacing agent was used to eliminate the residual processing solution accumulated in minute gaps and pinholes, and when the post-processing was thoroughly cleaned in boiling water. show. Table 4 shows examples of post-treatment cleaning using a water displacement agent or boiled water to eliminate residual treatment liquid, but the water displacement agent has almost no effect and cleaning with boiling water is more effective. It turned out to be true. However, during a 12-day temperature and humidity test at a temperature of 60°C and a humidity of 90% RH, corrosion was observed in 20 to 30% of the material.
【表】【table】
実験は残留フラツクス及び各種洗浄処理後の
ろう付け部のPHを比較した結果である。ろう付け
部のPHは純水をろう付け部に滴下した溶液を用い
た。
第５表にろう付け後の残留フラツクス及び各種
洗浄後のろう付け部のPH測定結果を示す。
The results of the experiment were to compare the residual flux and the pH of the brazed part after various cleaning treatments. For the pH of the brazed part, a solution of pure water dropped onto the brazed part was used. Table 5 shows the residual flux after brazing and the PH measurement results of the brazed part after various cleanings.
【表】【table】
実験は各種中和液のアルミニウムに対する腐
食性を比較した結果である。
第６表に各種中和液を用い温度60℃、30分放置
した時のアルミニウムの腐食性を調査した結果を
示す。
The experiment is the result of comparing the corrosivity of various neutralizing liquids to aluminum. Table 6 shows the results of investigating the corrosivity of aluminum when various neutralizing solutions were used and left for 30 minutes at a temperature of 60°C.
実験はメタケイ酸ナトリウム溶液による洗浄
効果を比較した結果である。
The experiment is the result of comparing the cleaning effects of sodium metasilicate solutions.
【表】【table】
実験では、実験で第７表に示す工程で後処
理洗浄を行つた、 0.01重量％のメタケイ酸ナ
トリウム溶液の湯洗を入れた工程（本発明）によ
るアルミニウムろう付け部品と、 従来工程に
よるアルミニウムろう付け部品とについて、耐食
性の差異を調べるために環境試験を行つた。
第７図に本発明により処理されたろう付部品と
従来工程により処理されたろう付部品の屋外バク
ロ試験結果を示すが、本発明の処理方法によれば
屋外ばくろ３年を経過してもほとんど腐食の発生
が認められず、耐食性を向上させるためのアルミ
ニウム及びアルミニウム合金ろう付け後洗浄処理
として有効である事が確認された。
〔発明の効果〕
本発明は以上説明した様に、アルミニウム及び
アルミニウム合金のろう付部特にすきまやピンホ
ール個所に残留したフラツクスを中和し非腐食性
とする事で、耐食性を著しく向上させるものであ
るから、マイクロ波の通信機器に使用するアルミ
ニウム導波管のフランジ部、分岐部、マウント
部、等複雑なしかもろう材の流れの悪い個所でも
腐食を発生させる事なく容易に使用することがで
き、従来法に比べ著しく使用範囲を拡大されるも
のである。
In the experiment, aluminum brazed parts by the process (invention) that included hot water washing with 0.01% by weight sodium metasilicate solution and aluminum brazed parts by the conventional process were subjected to post-treatment cleaning as shown in Table 7. An environmental test was conducted to investigate the difference in corrosion resistance between the attached parts and the attached parts. Figure 7 shows the results of an outdoor vacuum test for brazed parts treated according to the present invention and brazed parts treated by the conventional process. No occurrence of corrosion was observed, and it was confirmed that this treatment is effective as a cleaning treatment after brazing aluminum and aluminum alloys to improve corrosion resistance. [Effects of the Invention] As explained above, the present invention significantly improves corrosion resistance by neutralizing flux remaining in brazed parts of aluminum and aluminum alloys, especially in gaps and pinholes, making them non-corrosive. Therefore, it can be easily used without causing corrosion even in complex areas such as flanges, branches, mounts, etc. of aluminum waveguides used in microwave communication equipment, or in areas where the flow of filler metal is poor. This method significantly expands the scope of use compared to conventional methods.
第１図ａは従来技術によるろう付け部を示す正
面図、ｂは断面図、ｃは要部拡大断面図を示す。
第２図はピンホール発生個所の拡大断面図、第３
図ａ，ｂ、第４図ａ，ｂはいずれも従来技術によ
る耐食性試験結果を示す図、第５図はメタケイ酸
ナトリウム濃度と洗浄効果の関係を示す図、第６
図は処理温度と洗浄効果の関係を示す図、第７図
は従来技術処理品と本発明処理品の耐食性を示す
図である。
１，２……アルミニウム管、３……フランジ、
４，４′……接合部分、７……すきま発生個所、
８……ろう付け部、９……ピンホール。
FIG. 1a is a front view showing a conventional brazing part, b is a sectional view, and FIG. 1c is an enlarged sectional view of the main part.
Figure 2 is an enlarged sectional view of the location where the pinhole occurs, Figure 3
Figures a, b and Figure 4 a, b are all diagrams showing the results of corrosion resistance tests using conventional technology. Figure 5 is a diagram showing the relationship between sodium metasilicate concentration and cleaning effect.
The figure shows the relationship between processing temperature and cleaning effect, and FIG. 7 shows the corrosion resistance of products treated with the prior art and products treated with the present invention. 1, 2... Aluminum pipe, 3... Flange,
4, 4'...Joint part, 7...Gap location,
8...Brazing part, 9...Pinhole.
Claims (1)
付けに用いる無機系塩化物及びフツ化物を含有す
る弱酸性フラツクスを除去するためのフラツクス
除去剤であつて、メタケイ酸ナトリウム0.005〜
0.1重量％を含有するPH８ないしPH10.5の水溶液
からなるアルミニウムまたはアルミニウム合金の
ろう付け用フラツクス除去剤。 ２ 無機系塩化物及びフツ化物を含有する弱酸性
フラツクスを用いてアルミニウムまたはアルミニ
ウム合金にろう付けした被処理物を、メタケイ酸
ナトリウム0.005〜0.1重量％を含有しPH８ないし
PH10.5を呈示する温度60℃以上の湯中に、30分以
上浸漬することを特徴とするろう付け後処理洗浄
方法。[Scope of Claims] 1. A flux remover for removing weakly acidic flux containing inorganic chlorides and fluorides used for brazing aluminum or aluminum alloys, comprising 0.005 to 0.05 of sodium metasilicate.
A flux remover for brazing aluminum or aluminum alloys consisting of an aqueous solution of PH8 to PH10.5 containing 0.1% by weight. 2. A workpiece brazed to aluminum or an aluminum alloy using a weakly acidic flux containing inorganic chlorides and fluorides, containing 0.005 to 0.1% by weight of sodium metasilicate and having a pH of 8 to 8.
A post-brazing cleaning method characterized by immersion in hot water with a pH of 10.5 and a temperature of 60°C or higher for 30 minutes or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10688278A JPS5533863A (en) | 1978-08-31 | 1978-08-31 | Removing agent of flux for brazing and after brazing treatment washing method using said agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10688278A JPS5533863A (en) | 1978-08-31 | 1978-08-31 | Removing agent of flux for brazing and after brazing treatment washing method using said agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5533863A JPS5533863A (en) | 1980-03-10 |
| JPS6316220B2 true JPS6316220B2 (en) | 1988-04-07 |
Family
ID=14444863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10688278A Granted JPS5533863A (en) | 1978-08-31 | 1978-08-31 | Removing agent of flux for brazing and after brazing treatment washing method using said agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5533863A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6264471A (en) * | 1985-09-13 | 1987-03-23 | Furukawa Alum Co Ltd | Production of aluminum heat exchanger |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5378209A (en) * | 1976-12-22 | 1978-07-11 | Nitsupon Teiipooru Kk | Alkaline detergent compositions |
-
1978
- 1978-08-31 JP JP10688278A patent/JPS5533863A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5378209A (en) * | 1976-12-22 | 1978-07-11 | Nitsupon Teiipooru Kk | Alkaline detergent compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5533863A (en) | 1980-03-10 |
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