JPS6267180A - Chromate treatment of fuel pipe made of aluminum alloy material - Google Patents
Chromate treatment of fuel pipe made of aluminum alloy materialInfo
- Publication number
- JPS6267180A JPS6267180A JP20726485A JP20726485A JPS6267180A JP S6267180 A JPS6267180 A JP S6267180A JP 20726485 A JP20726485 A JP 20726485A JP 20726485 A JP20726485 A JP 20726485A JP S6267180 A JPS6267180 A JP S6267180A
- Authority
- JP
- Japan
- Prior art keywords
- chromate treatment
- chromate
- treatment
- corrosion resistance
- treatment liquid
- 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.)
- Granted
Links
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
発明のｄ￥糸１１ ｆ、Ｋ ８免明
〔発明の目的〕
（産業上の利用分野）
本発明はアルコールを含む混合燃料に対する耐蝕性を向
上させるために、クロメート処理を施したアルミ合金材
の燃料パイプの端末のプラグ溶接加工のクロメート加］
こ法に関するもので、自動車用のフューエルデリバリ−
パイプの処理に広く利川されるものである。Detailed Description of the Invention: d\thread 11f, K8 Illusion of the Invention [Object of the Invention] (Industrial Field of Application) The present invention uses chromate treatment to improve the corrosion resistance against mixed fuel containing alcohol. Chromate addition of the plug welding process on the end of the fuel pipe of aluminum alloy material]
This law relates to fuel delivery for automobiles.
It is widely used in pipe treatment.
（従来の技術）
本発明に係る従来技術としては、アルミニウム表面技術
便覧１９Ｂ０．１０．１７発行Ｐ、６９〜Ｐ、２７１に
クロメート処理法についての記載があり、この従来のも
のについての組成及び条件についてこれを第３表に示す
。(Prior art) As a prior art related to the present invention, there is a description of a chromate treatment method in Aluminum Surface Technology Handbook 19B0.10.17 issue P, 69-P, 271, and the composition and conditions for this conventional method are described. This is shown in Table 3.
自動車用エンジンに使用されるフューエルデリバリ−パ
イプはクロメート処理後、メクラ蓋を直接プロジェクシ
ョン溶接を行っているが、従来のクロメート処理法は、
クロム付着量が多く溶接を行った場合、溶接強度の低下
が著しく、燃料が溶接部より漏れ易い、このために溶接
位胃のクロメート皮膜を剥離してから溶接を行うとか、
溶接を実施してからクロメート処理を実施しているもの
である。Fuel delivery pipes used in automobile engines are chromate treated and then the blind lid is directly projection welded, but the conventional chromate treatment method
If welding is carried out with a large amount of chromium deposited, the welding strength will be significantly reduced and fuel will easily leak from the welded area.For this reason, the chromate film on the stomach of the welding area must be peeled off before welding.
Chromate treatment is performed after welding.
（発明が解決しようとする問題点）
然し前記クロメート処理の方法、すなわちクロメート皮
膜を剥離してからｆ６接する方法は、機械的また化学的
にも剥離するのに手間がかかり、更に剥離した部分の耐
蝕性低下という問題があり、また溶接してからクロメー
ト処理することは品質的には問題がないが、パイプ内が
袋形状となり処理液のくみ出しが多く、またパイプ内の
処理液の洗浄が困難となり、結果的に非常にコスト高に
なるという問題点がある。(Problems to be Solved by the Invention) However, the above-mentioned chromate treatment method, that is, the method of peeling off the chromate film and then applying f6 contact, requires time and effort to peel off mechanically and chemically, and furthermore, the peeled part is removed. There is a problem of reduced corrosion resistance, and although there is no quality problem with chromate treatment after welding, the inside of the pipe becomes bag-shaped and a lot of treatment liquid comes out, and it is difficult to clean the treatment liquid inside the pipe. As a result, there is a problem in that the cost becomes extremely high.
本発明はワークにクロメート処理を行う場合に耐蝕性が
強く、クロム付着量の少ないもの、すなわち溶接強度の
あるクロメート処理液を提供することを目的とするもの
である。The object of the present invention is to provide a chromate treatment solution that has strong corrosion resistance and a small amount of chromium deposit when chromate treatment is applied to a workpiece, that is, has welding strength.
（問題点を解決するための手段及び作用）上記問題点を
解決するために講じた手段は、次のようである。(Means and effects for solving the problems) The measures taken to solve the above problems are as follows.
従来のクロメート液の組成に対して、モリブデン酸アン
モニウム及び硫酸チタンを添加してクロメート処理を行
うものである。すなわち、アルミ合金材の燃料パイプの
クロメート処理方法において、クロメート処理液組成を
無水クロム酸２〜４ｇ ／ Ｌ 、重クロム酸ナトリウ
ム２〜３．５ｇ／Ｌ。Chromate treatment is performed by adding ammonium molybdate and titanium sulfate to the composition of a conventional chromate solution. That is, in the chromate treatment method for fuel pipes made of aluminum alloy materials, the composition of the chromate treatment solution is 2 to 4 g/L of chromic anhydride and 2 to 3.5 g/L of sodium dichromate.
フッ化ナトリウム０．２〜１．ｏｇ／Ｌ、モリブデン酸
アンモニウム０．０５．０．１５ｇ／Ｌ、硫酸チタン０
．０２〜０．０５ｇ／Ｌ、ＰＨ２〜３．５のクロメート
組成液に対して浴温３０〜４５℃処理時間２０〜５０秒
にてクロメートするものである。Sodium fluoride 0.2-1. og/L, ammonium molybdate 0.05.0.15g/L, titanium sulfate 0
．． 02 to 0.05 g/L and a chromate composition liquid with a pH of 2 to 3.5 is chromated at a bath temperature of 30 to 45° C. for a treatment time of 20 to 50 seconds.
前記クロメート処理により、アルミ合金材よりなる燃料
パイプのクロム付着量は４０〜２００■／ｒｒｒとなり
モリブデン酸アンモニウム及び硫酸チタンの添加により
クロムの付着層が緻密化し、薄いクロメート皮膜でも耐
蝕性を確保でき、薄い皮膜のための溶接強度が低下する
ことがなく、従って燃料パイプの溶接部より燃料もれが
発生しないものである。Due to the chromate treatment, the amount of chromium deposited on the fuel pipe made of aluminum alloy material is 40 to 200 μ/rrr, and the addition of ammonium molybdate and titanium sulfate makes the chromium deposit layer denser, making it possible to ensure corrosion resistance even with a thin chromate film. Since the welding strength is not reduced due to the thin coating, fuel leakage does not occur from the welded portion of the fuel pipe.
（実施例） 以下具体的な実施例について説明する。(Example) Specific examples will be described below.
１は自動車用エンジンの燃料系パイプとして使用されて
いるデリバリ−パイプで、２は本体、３ａ、３ｂは両端
のメクラ蓋である。デリバリ−パイプ本体２はアルミ合
金材（ＪＩＳのＡＤＣ１２）よりなり、防蝕品目的で第
１表に示す条件でりロメート処理後、両端にニッケルメ
ッキをした鋼材（Ｓ Ｉ Ｓ Ｃ）よりなるメクラ蓋３
ａ、３ｂをプロジェクション溶接した。1 is a delivery pipe used as a fuel system pipe for an automobile engine, 2 is a main body, and 3a and 3b are blind lids at both ends. The delivery pipe main body 2 is made of aluminum alloy material (JIS ADC12), and after being subjected to romate treatment under the conditions shown in Table 1 for corrosion protection, it is fitted with a blind lid made of steel material (SISC) with nickel plating on both ends. 3
Projection welding was performed on parts a and 3b.
第１表
プロジェクション溶接の条件としては電流７０ＫＡＸ加
圧１．６トン×負荷時間０．１５秒である。Table 1 Projection welding conditions are: current 70 KAX, pressure 1.6 tons x load time 0.15 seconds.
この場合のクロメートの耐蝕性と溶接部の強度、及びク
ロメート皮膜のクロムは付着量を第２表に示す方法で評
価した。In this case, the corrosion resistance of chromate, the strength of the welded part, and the amount of chromium deposited in the chromate film were evaluated by the methods shown in Table 2.
第２表
クロメート処理時間と第２表による耐蝕性、溶接強度及
びクロム付着量についてのグラフを第２図に示す。Table 2 A graph of chromate treatment time, corrosion resistance, welding strength, and chromium deposition amount according to Table 2 is shown in FIG.
次に第３表に示す従来のクロメート液組成を使用した場
合の条件を前記第２表の耐蝕性、溶接強度及びクロム付
着量について処理時間との関係を第３図のグラフに示す
。Next, the relationship between the corrosion resistance, welding strength, and amount of chromium deposited in Table 2 and the treatment time under the conditions when the conventional chromate solution composition shown in Table 3 is used is shown in the graph of FIG.
第２及び第３図より本発明のクロメート処理方法は、処
理条件２０〜５０秒の間で耐蝕性をＲ・Ｎ９以上で、か
つ溶接強度も１２００ｋｇ以上確保することができる。As shown in FIGS. 2 and 3, the chromate treatment method of the present invention can ensure corrosion resistance of R.N.9 or more and welding strength of 1200 kg or more under treatment conditions of 20 to 50 seconds.
従来法では第３図より処理時間を４０秒以上にすること
により耐蝕性をＲ−Ｎ９以上に確保できるが、溶接温度
は非常に低下し１０００ ｋｇをも確第 ３ 表
保できないものである。In the conventional method, corrosion resistance of R-N9 or higher can be ensured by increasing the processing time to 40 seconds or more as shown in FIG. 3, but the welding temperature is so low that even 1000 kg cannot be maintained reliably.
本発明は次の特有の効果を有する。すなわら、従来のク
ロメート処理液に、モリブデン酸アンモニウム及び硫酸
チタンを添加することにより、耐蝕性及び溶接強度が増
加するために、燃料パイプを溶接のために一部クロメー
ト処理部を剥離する必要がなく、設備及び工数の低減を
はかることができ、剥離工程による溶接部分以外の剥離
もまったく無いものである。The present invention has the following unique effects. In other words, by adding ammonium molybdate and titanium sulfate to the conventional chromate treatment liquid, corrosion resistance and welding strength are increased, so it is necessary to peel off some of the chromate treatment part of the fuel pipe for welding. There is no need for equipment and man-hours, and there is no peeling at areas other than the welded areas due to the peeling process.
第１図は自動車用デリバリ−バイブの外観斜視図であり
、第２図は本実施例によるりしｚメート処理の時間と耐
蝕性、溶接強度及びクロムは付着量を示すグラフであり
、第３図は従来例による第２図と同様なグラフである。FIG. 1 is a perspective view of the appearance of a delivery vibrator for an automobile, FIG. 2 is a graph showing the time and corrosion resistance of the Z-mate treatment according to the present example, welding strength, and the amount of chromium deposited. The figure is a graph similar to FIG. 2 according to the conventional example.
Claims (1)
て、クロメート処理液組成を無水クロム酸２．０〜４．
０ｇ／Ｌ、重クロム酸ナトリウム２．０〜３．５ｇ／Ｌ
、フッ化ナトリウム０．２〜１．０ｇ／Ｌ、モリブデン
酸アンモニウム０．０５〜０．１５ｇ／Ｌ、硫酸チタン
０．０２／０．０５ｇ／Ｌ、ＰＨ２〜３．５とし浴温３
０〜４５℃、処理時間２０〜５０秒とするクロメート処
理方法。In the chromate treatment method for fuel pipes made of aluminum alloy materials, the composition of the chromate treatment liquid is chromic anhydride 2.0 to 4.
0g/L, sodium dichromate 2.0-3.5g/L
, sodium fluoride 0.2-1.0 g/L, ammonium molybdate 0.05-0.15 g/L, titanium sulfate 0.02/0.05 g/L, pH 2-3.5 and bath temperature 3.
A chromate treatment method in which the temperature is 0 to 45°C and the treatment time is 20 to 50 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20726485A JPS6267180A (en) | 1985-09-19 | 1985-09-19 | Chromate treatment of fuel pipe made of aluminum alloy material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20726485A JPS6267180A (en) | 1985-09-19 | 1985-09-19 | Chromate treatment of fuel pipe made of aluminum alloy material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6267180A true JPS6267180A (en) | 1987-03-26 |
| JPH0351793B2 JPH0351793B2 (en) | 1991-08-07 |
Family
ID=16536910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20726485A Granted JPS6267180A (en) | 1985-09-19 | 1985-09-19 | Chromate treatment of fuel pipe made of aluminum alloy material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6267180A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021278A1 (en) * | 1994-02-03 | 1995-08-10 | Henkel Kommanditgesellschaft Auf Aktien | Chromating process or phosphate-chromating process and materials suitable for identifying the treatment process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5245544A (en) * | 1975-09-18 | 1977-04-11 | Kaoru Aotani | Process for black chromate treating zinc |
| JPS5887280A (en) * | 1981-11-18 | 1983-05-25 | Kawasaki Steel Corp | Chromate treatment of steel plate plated with zinc or zinc alloy |
-
1985
- 1985-09-19 JP JP20726485A patent/JPS6267180A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5245544A (en) * | 1975-09-18 | 1977-04-11 | Kaoru Aotani | Process for black chromate treating zinc |
| JPS5887280A (en) * | 1981-11-18 | 1983-05-25 | Kawasaki Steel Corp | Chromate treatment of steel plate plated with zinc or zinc alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021278A1 (en) * | 1994-02-03 | 1995-08-10 | Henkel Kommanditgesellschaft Auf Aktien | Chromating process or phosphate-chromating process and materials suitable for identifying the treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351793B2 (en) | 1991-08-07 |
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