JPH09287062A - Production of pure aluminum material excellent in pitting corrosion resistance - Google Patents
Production of pure aluminum material excellent in pitting corrosion resistanceInfo
- Publication number
- JPH09287062A JPH09287062A JP12266296A JP12266296A JPH09287062A JP H09287062 A JPH09287062 A JP H09287062A JP 12266296 A JP12266296 A JP 12266296A JP 12266296 A JP12266296 A JP 12266296A JP H09287062 A JPH09287062 A JP H09287062A
- Authority
- JP
- Japan
- Prior art keywords
- pure aluminum
- heating
- aluminum material
- pitting corrosion
- pure
- 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.)
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アルミニウム熱交
換器など、腐食環境で使用される製品の材料として好適
な耐孔食性に優れた純アルミニウム材の製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a pure aluminum material having excellent pitting corrosion resistance, which is suitable as a material for products used in corrosive environments such as aluminum heat exchangers.
【０００２】[0002]
【従来の技術】純アルミニウム材は、表面酸化皮膜の生
成により耐食性が比較的よく、また加工性や溶接性が良
好な材料として工業用に広く用いられており、例えば、
単独で使用する他にＡｌ−Ｍｎ合金等の芯材に犠牲陽極
皮材としてクラッドしたクラッド材としても使用されて
いる。このクラッド材は、厳しい腐食環境に晒される熱
交換器用の材料に好適なものとして知られている。2. Description of the Related Art Pure aluminum materials are widely used industrially as materials having relatively good corrosion resistance due to the formation of a surface oxide film and good workability and weldability.
Besides being used alone, it is also used as a clad material in which a core material such as an Al-Mn alloy is clad as a sacrificial anode skin material. This clad material is known to be suitable as a material for a heat exchanger exposed to a severe corrosive environment.
【０００３】[0003]
【発明が解決しようとする課題】ところが上記した純ア
ルミニウム材は、全面腐食に対しては比較的良い耐食性
を示すものの、しばしば局部的に孔食が発生し、しかも
この孔食が急速に進行するという問題がある。本発明者
らは、上記現象の発生について調査、研究したところ、
純アルミニウム材が鋳造、熱間圧延、押出加工等の熱遍
歴を経ることにより、マトリックス中に不可避不純物、
特にＳｉによる比較的粗大な晶出物が散在して生成され
ることが原因になっているのではないかと考えるに至っ
た。すなわち、上記晶出部は、周辺の自然酸化皮膜を弱
くする性質を有しており、この部分を起点にして腐食が
発生、進行しやすく、これが原因になって孔食が発生す
ることが判明した。しかも上記晶出部は、少数が散在し
た状態にあるので、孔食が局所的に起こり、かつ個々の
孔食の成長速度が大きくなり、腐食が局部的かつ急激に
進行することになる。However, although the above-mentioned pure aluminum material has relatively good corrosion resistance to general corrosion, it often causes localized pitting corrosion, and this pitting corrosion progresses rapidly. There is a problem. The present inventors have investigated and studied the occurrence of the above phenomenon,
Inevitable impurities in the matrix due to the heat history of pure aluminum materials such as casting, hot rolling, and extrusion.
In particular, it has been thought that the cause may be that relatively large crystallized substances due to Si are scattered and generated. That is, the crystallized portion has a property of weakening the natural oxide film around it, and corrosion is generated from this portion as a starting point, and it is easy for the corrosion to proceed, which causes pitting corrosion. did. Moreover, since a small number of the crystallized portions are scattered, pitting corrosion locally occurs, the growth rate of each pitting corrosion increases, and corrosion locally and rapidly progresses.
【０００４】なお、上記純アルミニウム材をろう付する
場合には、ろう付による加熱と比較的速い冷却により粗
大な晶出物の生成は避けられるものの、耐孔食性に劣っ
ているという点では同様の問題がある。また、これを芯
材とクラッドするなどして犠牲陽極材として使用する際
には、ろう付後の冷却によりＳｉが固溶したままの状態
になって電位が上がることにより芯材との電位差が小さ
くなり、犠牲陽極材としての機能が十分に得られないと
いう問題もある。In the case of brazing the above pure aluminum material, although the formation of coarse crystallized substances can be avoided by heating by brazing and cooling relatively fast, it is similar in that it is inferior in pitting corrosion resistance. I have a problem. In addition, when this is used as a sacrificial anode material by clad with a core material, the potential difference between the core material and the core material is increased due to the fact that Si remains in a solid solution due to cooling after brazing and the potential rises. There is also a problem that it becomes smaller and the function as a sacrificial anode material cannot be sufficiently obtained.
【０００５】本発明は、上記事情を背景としてなされた
ものであり、局部的な孔食の発生を阻止して耐孔食性を
向上させ、また、犠牲陽極材としての使用においては十
分に電位を下げてその機能を発揮できる純アルミニウム
材の製造方法を提供することを目的とする。The present invention has been made against the background of the above circumstances. It prevents local pitting from occurring and improves pitting resistance, and when used as a sacrificial anode material, a sufficient potential is maintained. It is an object of the present invention to provide a method for producing a pure aluminum material which can be lowered to exert its function.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するた
め、本発明の耐孔食性に優れたアルミニウム材の製造方
法のうち第１の発明は、純アルミニウム材に対し５００
〜６２０℃の温度で加熱した後、５℃／ｍｉｎ以上の冷
却速度で冷却する加熱処理を行い、さらに１８０〜３８
０℃で加熱する再加熱処理を施すことを特徴とする。第
２の発明は、アルミニウム合金芯材の片面または両面に
皮材としてクラッドされている純アルミニウム材に対
し、第１の発明記載の加熱処理および再加熱処理を行う
ことを特徴とする。In order to solve the above problems, the first invention of the method for producing an aluminum material excellent in pitting corrosion resistance according to the present invention is 500 for pure aluminum material.
After heating at a temperature of 620 ° C. to 620 ° C., a heat treatment of cooling at a cooling rate of 5 ° C./min or more is performed, and then 180 to 38.
It is characterized in that a reheating treatment of heating at 0 ° C. is performed. A second invention is characterized in that the heat treatment and the reheat treatment described in the first invention are performed on a pure aluminum material clad as a skin material on one surface or both surfaces of an aluminum alloy core material.
【０００７】[0007]
【発明の実施形態】本発明の加熱処理の対象となる純ア
ルミニウム材は、Ｓｉ、Ｆｅ等を不純物として含み、そ
の他がアルミニウムからなる組成を有しており、純度９
８．０％以上のアルミニウム材をいう。なお、この純ア
ルミニウムに含まれるＳｉ量は、１．０％以下であるの
が望ましい。これは、１．０％を越えてＳｉを含有して
いると、後述する加熱処理によっても晶出物を十分に消
失させることが困難であり、耐孔食性の向上効果が十分
に得られないためである。なお、同様の理由で、さらに
Ｓｉ含有量は０．６％以下であるのが望ましい。BEST MODE FOR CARRYING OUT THE INVENTION The pure aluminum material which is the object of the heat treatment of the present invention has a composition containing Si, Fe and the like as impurities and the other being aluminum, and has a purity of 9%.
Aluminum material of 8.0% or more. The amount of Si contained in this pure aluminum is preferably 1.0% or less. This is because if Si is contained in excess of 1.0%, it is difficult to sufficiently eliminate crystallized substances even by the heat treatment described later, and the effect of improving pitting corrosion resistance cannot be sufficiently obtained. This is because. For the same reason, the Si content is preferably 0.6% or less.
【０００８】また、本発明法の効果は、Ｓｉを０．０５
％以上含有する純アルミニウム材において顕著に得られ
る。これは、ある程度Ｓｉを含有している純アルミニウ
ム材に、本発明法を適用することにより全面腐食形態へ
の移行が可能になるためであり、０．０５％未満のＳｉ
を含有する純アルミニウム材では十分な効果は得られな
い。なお、同様の理由で、本発明法は、特にＳｉを０．
１％以上含有する純アルミニウム材に好適である。Further, the effect of the method of the present invention is that Si is 0.05
% Is remarkably obtained in a pure aluminum material containing at least%. This is because by applying the method of the present invention to a pure aluminum material containing Si to some extent, it becomes possible to shift to a general corrosion mode, and a Si content of less than 0.05%.
A sufficient effect cannot be obtained with a pure aluminum material containing. For the same reason, according to the method of the present invention, especially when Si is 0.
It is suitable for a pure aluminum material containing 1% or more.
【０００９】また、本発明の加熱処理の対象となる純ア
ルミニウム材は、単材として加熱処理および再加熱処理
を行う場合は勿論のこと、他の材料とともに処理される
ものであってもよく、要は、純アルミニウム材の処理を
目的として提供されるものであれば単材、複合材等を問
わないものである。なお、純アルミニウム材を他の材料
とともに処理する場合としては、一部構造が純アルミニ
ウム材からなるものや、純アルミニウム材とアルミニウ
ム合金等とを積層したクラッド材等を例示することがで
きる。このクラッド材としては、アルミニウム合金等の
片面または両面に純アルミニウム材をクラッドしたもの
が挙げられる。また、アルミニウム合金等に純アルミニ
ウム材を片面にクラッドする場合には、他面に他の材
料、例えばろう材等がクラッドされているものであって
もよい。The pure aluminum material to be heat-treated according to the present invention may be heat-treated and re-heated as a single material, or may be heat-treated with other materials. The point is that it does not matter whether it is a single material or a composite material as long as it is provided for the purpose of treating a pure aluminum material. In the case of treating a pure aluminum material with other materials, a part of the structure is made of a pure aluminum material, a clad material obtained by laminating a pure aluminum material and an aluminum alloy, etc. can be exemplified. Examples of the clad material include an aluminum alloy clad with a pure aluminum material on one side or both sides. When a pure aluminum material is clad on one surface of an aluminum alloy or the like, the other surface may be clad with another material such as a brazing material.
【００１０】上記純アルミニウム材を、本発明の加熱処
理によって５００〜６２０℃で加熱することにより、Ｓ
ｉ等の粗大晶出物がマトリックス中に固溶して消失す
る。これを強制的に冷却することにより粗大晶出物の生
成を抑え、Ｓｉが溶け込んだままの凝固組織が得られ
る。なお、上記加熱温度が５００℃未満であると、晶出
物の固溶、消失が不十分となり、また、６２０℃を越え
て加熱すると材料の部分溶融が生じるため、加熱温度を
上記範囲内とする。なお、同様の理由で、さらに下限を
５６０℃、上限を６１０℃とするのが望ましく、さら
に、下限を５９０℃とするのが一層望ましい。By heating the above-mentioned pure aluminum material at 500 to 620 ° C. by the heat treatment of the present invention, S
Coarse crystallized substances such as i disappear as a solid solution in the matrix. By forcibly cooling this, formation of coarse crystallized substances is suppressed, and a solidified structure in which Si is still melted can be obtained. If the heating temperature is lower than 500 ° C, the solid solution and disappearance of the crystallized substance will be insufficient, and if the heating temperature is higher than 620 ° C, the material will partially melt. To do. For the same reason, it is preferable that the lower limit is 560 ° C., the upper limit is 610 ° C., and the lower limit is more preferably 590 ° C.
【００１１】上記温度範囲における加熱保持時間は、材
料の厚さ等によっても異なるため、特に限定するもので
はなく、Ｓｉによる粗大晶出物を固溶させるのに十分な
時間とする。ただし、長時間保持しても無駄であるの
で、適宜上限を定める。これらの点から通常は、概ね１
分〜３０分の保持時間とする。なお、純アルミニウム材
をＡｌ−Ｍｎ系合金等にクラッドしたクラッド材では、
上記加熱の際に、異なる成分の材料間で成分の拡散が生
じ、種々の不具合が生じるため、加熱時間を２０分以内
とするのが望ましい。The heating and holding time in the above temperature range varies depending on the thickness of the material and so is not particularly limited, and is set to a time sufficient for solid solution of the coarse crystallized product of Si. However, holding for a long time is useless, so an upper limit is set appropriately. From these points, usually about 1
The holding time is from 30 minutes to 30 minutes. In addition, in a clad material obtained by clad a pure aluminum material in an Al-Mn-based alloy,
During the above heating, the components are diffused between materials having different components, causing various problems. Therefore, it is desirable that the heating time be within 20 minutes.
【００１２】また、上記した加熱処理は、純アルミニウ
ム材を用いてろう付処理をする場合には、ろう付処理に
おける加熱で兼用することができ、ろう付加熱温度を上
記温度範囲に設定することにより加熱処理による作用が
得られる。これにより、ろう付中にＳｉによる粗大晶出
物が固溶して消失する。なお、この場合の加熱保持時間
は、粗大晶出物の固溶の他に、ろう付が良好に行われる
ことを考慮して定められ、５分以上とするのが望まし
い。When the brazing treatment is performed using a pure aluminum material, the above-mentioned heat treatment can be also used for heating in the brazing treatment, and the brazing heat temperature should be set within the above temperature range. The effect of heat treatment can be obtained. As a result, the coarse crystallized product due to Si is solid-dissolved and disappears during brazing. In addition, the heating and holding time in this case is determined in consideration of good brazing in addition to the solid solution of the coarse crystallized substance, and is preferably 5 minutes or more.
【００１３】上記加熱後、アルミニウム材を５℃／ｍｉ
ｎ以上の冷却速度で冷却することにより、Ｓｉの固溶状
態が維持され、粗大晶出物の生成が抑制される。さら
に、上記作用を確実に得るために冷却速度を１０℃／ｍ
ｉｎ以上とするのが一層望ましい。After the above heating, the aluminum material was heated to 5 ° C./mi.
By cooling at a cooling rate of n or more, the solid solution state of Si is maintained and the formation of coarse crystallized substances is suppressed. Further, in order to surely obtain the above action, the cooling rate is 10 ° C / m.
It is more desirable to be in or more.
【００１４】上記した、加熱、冷却後、１８０〜３８０
℃で再加熱処理することにより、固溶状態にあるＳｉが
マトリックス中に微細、均一に高密度で析出する。この
高密度の微細析出物は、純アルミニウム材を製品として
使用した際に、成長の遅い孔食を均一に多数発生させる
ことになり全面腐食形態に移行させて局部的な孔食を防
止する。これにより純アルミニウム材は、耐孔食性が大
幅に向上することになる。またＳｉが析出することによ
りＳｉ固溶度が下がり、よって純アルミニウム材の電位
が下がるので、これを例えば犠牲陽極材として使用する
際に防食する材料との電位差が大きくなり、十分な性能
を発揮することができる。After heating and cooling as described above, 180 to 380
By performing the reheating treatment at 0 ° C., Si in a solid solution state is finely and uniformly precipitated in the matrix with high density. When the pure aluminum material is used as a product, the high-density fine precipitates cause a large number of slow-growing pitting corrosion to be generated uniformly, so that the pitting corrosion is converted into a general corrosion form and local pitting corrosion is prevented. As a result, the pitting corrosion resistance of the pure aluminum material is significantly improved. In addition, the precipitation of Si lowers the solid solubility of Si, which lowers the potential of the pure aluminum material, so that when it is used as, for example, a sacrificial anode material, the potential difference with the material that protects against corrosion becomes large, and sufficient performance is exhibited. can do.
【００１５】なお、上記再加熱温度が１８０℃未満であ
ると、Ｓｉの析出が十分になされず、また、析出が遅い
ため再加熱に長時間を要して工業的でない。一方、３８
０℃を越えると、前記加熱処理と同様にＳｉがマトリッ
クスに溶け込み、微細なＳｉ析出物が均一、高密度で生
成されないので、再加熱処理温度を前記温度範囲とす
る。なお、同様の理由で、下限を２５０℃、上限を３５
０℃とするのが望ましい。上記再加熱時間は、前記加熱
処理における保持時間と同様に対象となる材料の厚さ等
により異なるが、あまりに短時間であると、Ｓｉが十分
に析出せず、また長時間加熱しても無駄である。これら
の点から通常は、概ね５分〜５０時間の加熱時間にな
る。なお、再加熱処理後の冷却速度はＳｉの析出形態に
影響を与えるものではなく、本発明としては特に限定さ
れない。If the reheating temperature is less than 180 ° C., the precipitation of Si will not be sufficient, and since the precipitation will be slow, the reheating will take a long time, which is not industrial. On the other hand, 38
When the temperature exceeds 0 ° C., Si dissolves in the matrix as in the heat treatment, and fine Si precipitates are not generated with a uniform and high density. Therefore, the reheat treatment temperature is within the above temperature range. For the same reason, the lower limit is 250 ° C. and the upper limit is 35 ° C.
Desirably, it is 0 ° C. The reheating time varies depending on the thickness of the target material and the like similarly to the holding time in the heat treatment, but if it is too short, Si is not sufficiently precipitated, and even if it is heated for a long time, it is useless. Is. From these points, the heating time is usually about 5 minutes to 50 hours. The cooling rate after the reheating treatment does not affect the precipitation form of Si and is not particularly limited as the present invention.
【００１６】本発明の製造過程を経て得られた耐孔食性
に優れた純アルミニウム材は、単独材として種々の用途
に使用することができ、特に厳しい腐食環境におかれる
熱交換器のベアフィン等として使用するのに好適であ
る。また、Ａｌ合金等にクラッドして使用されるものと
しては、例えば、１．０〜１．５％（好適には１．０〜
１．２％）のＭｎを含有するＡｌ−Ｍｎ系合金芯材の片
面または両面に犠牲陽極皮材としてクラッドされたもの
が挙げられる。なお、上記芯材のＭｎ量は、下限未満で
は強度が不足し、一方、上限を越えると加工性が低下す
るという観点から選定されている。このクラッド材は、
上記と同様に厳しい腐食環境におかれる熱交換器のチュ
ーブ、ヘッダープレート、サイドサポート等に適用する
ことができ、この場合、芯材の片面にのみ上記純アルミ
ニウム材をクラッドし、芯材の他面にはろう材をクラッ
ドしたブレージングシートとして上記チューブ等の製造
に供することができる。また、本発明法により得られた
純アルミニウム材は、上記用途の他、食品用カップ等の
日用品に使用することも可能である。The pure aluminum material excellent in pitting corrosion resistance obtained through the manufacturing process of the present invention can be used as a single material for various purposes, and bare fins of heat exchangers, etc. which are particularly exposed to severe corrosive environment. It is suitable for use as. Moreover, as what is clad with Al alloy etc. and used, for example, 1.0-1.5% (preferably 1.0-
One example is an Al—Mn-based alloy core material containing 1.2% Mn, which is clad as a sacrificial anode skin material on one or both surfaces. The Mn content of the core material is selected from the viewpoint that strength is insufficient if it is less than the lower limit and workability is deteriorated if it exceeds the upper limit. This clad material is
Similar to the above, it can be applied to tubes, header plates, side supports, etc. of heat exchangers that are exposed to severe corrosive environments.In this case, the pure aluminum material is clad on only one side of the core material and the other surface of the core material is used. It can be used as a brazing sheet in which a brazing material is clad to manufacture the above-mentioned tube or the like. Further, the pure aluminum material obtained by the method of the present invention can be used not only for the above-mentioned applications but also for daily necessities such as food cups.
【００１７】[0017]
【実施例】表１に示す成分の板状の純アルミニウム材
（０．５ｍｍ厚）を常法による鋳造、熱間圧延、冷間圧
延により製造し供試材とした。また、上記と同様の製造
過程を経て製造した純アルミニウム材を、表１に示すＡ
ｌ−Ｍｎ系合金芯材に１０％厚でクラッドして全厚０．
５ｍｍ厚の供試材を得た。さらに、上記と同成分のＡｌ
−Ｍｎ系合金芯材の片面に上記と同成分の純アルミニウ
ム材を１０％厚、他面に７．５％ＳｉのＡｌ−Ｓｉろう
材を１０％厚でクラッドして全厚０．５ｍｍの供試材を
得た。Example A plate-shaped pure aluminum material (0.5 mm thick) having the components shown in Table 1 was manufactured by a conventional method of casting, hot rolling, and cold rolling to obtain a test material. A pure aluminum material manufactured through the same manufacturing process as above is shown in Table 1
The total thickness of the 1-Mn-based alloy core material was clad at 10% and the total thickness was 0.
A test material having a thickness of 5 mm was obtained. In addition, Al with the same composition as above
A pure aluminum material having the same composition as the above is 10% thick on one surface of the —Mn alloy core material, and an Al—Si brazing material of 7.5% Si is clad on the other surface at a thickness of 10% so that the total thickness is 0.5 mm. The test material was obtained.
【００１８】[0018]
【表１】 [Table 1]
【００１９】上記各供試材に対し、発明法として表２に
示す加熱処理および再加熱処理を施した。なお、供試材
のうちろう材をクラッドしてあるものは、ＪＩＳ Ａ１
０７０合金を相手材としたろう付加熱を行い、該加熱で
上記加熱処理を兼用するものである。したがって表中の
加熱温度、時間はろう付温度、時間と同一である。ま
た、比較のため、供試材に対し上記処理の一部または全
部を施さないものを比較法として用意した。また、加熱
処理において、発明法では、Ｎｏ．３，１１は水冷、そ
の他は空冷により冷却し、比較法では、Ｎｏ．１４は放
冷、Ｎｏ．１８は空冷により冷却した。As a method of the invention, each of the above-mentioned test materials was subjected to the heat treatment and reheat treatment shown in Table 2. Among the test materials, those with clad brazing material are JIS A1
The 070 alloy is used as a mating material for brazing heat, and the heating also serves as the heat treatment. Therefore, the heating temperature and time in the table are the same as the brazing temperature and time. Further, for comparison, a test material which was not subjected to a part or all of the above treatment was prepared as a comparison method. Further, in the heat treatment, in the invention method, No. Nos. 3 and 11 are water-cooled, and others are air-cooled. No. 14 is left to cool. 18 was cooled by air cooling.
【００２０】次に、発明法および比較法を施した各供試
材に対し、１ｐｐｍＣｕ2+イオンを含む４０℃の水道水
に３０日間浸ける浸漬腐食試験を行い、各供試材に発生
した腐食の最大深さを測定した。その結果は表２に示
す。表２から明らかなように本発明法を経た純アルミニ
ウム材は、単材、クラッド材およびろう付材の全てにお
いて腐食深さが著しく小さくなっており、耐孔食性が大
幅に改善されている。一方、本発明の処理を全く施さな
いものや、ろう付まま等のものは腐食深さが大きく、孔
食が早期に進行している。なお、本発明法の中では、Ｓ
ｉ量を適切にしたものの方が、より優れた効果が得られ
ている。Next, each test material subjected to the invented method and the comparative method was subjected to a immersion corrosion test in which it was immersed in tap water containing 1 ppm Cu 2+ ions at 40 ° C. for 30 days, and the corrosion occurred in each test material. The maximum depth of was measured. The results are shown in Table 2. As is clear from Table 2, the pure aluminum material that has undergone the method of the present invention has a significantly small corrosion depth in all of the single material, the clad material and the brazing material, and the pitting corrosion resistance is greatly improved. On the other hand, those not subjected to the treatment of the present invention or those without brazing have a large corrosion depth and pitting corrosion progresses at an early stage. In the method of the present invention, S
A more suitable effect is obtained when the i amount is appropriate.
【００２１】[0021]
【表２】 [Table 2]
【００２２】[0022]
【発明の効果】以上説明したように、本発明の耐孔食性
に優れた純アルミニウム材の製造方法によれば、純アル
ミニウム材に対し５００〜６２０℃の温度で加熱した
後、５℃／ｍｉｎ以上の冷却速度で冷却する加熱処理を
行い、さらに１８０〜３８０℃で加熱する再加熱処理を
施すので、Ｓｉによる粗大晶出物を消失させて微細なＳ
ｉ析出物が均一に生成され、よって局部的な孔食の発生
が防止され、耐孔食性が大幅に向上する。As described above, according to the method for producing a pure aluminum material having excellent pitting corrosion resistance of the present invention, the pure aluminum material is heated at a temperature of 500 to 620 ° C. and then heated at 5 ° C./min. The heat treatment for cooling at the above cooling rate is performed, and the reheat treatment for heating at 180 to 380 ° C. is further performed. Therefore, coarse crystallized substances due to Si disappear and fine S
The i-precipitate is uniformly generated, which prevents local pitting corrosion from occurring and significantly improves the pitting corrosion resistance.
Claims (2)
℃の温度で加熱した後、５℃／ｍｉｎ以上の冷却速度で
冷却する加熱処理を行い、さらに１８０〜３８０℃で加
熱する再加熱処理を施すことを特徴とする耐孔食性に優
れた純アルミニウム材の製造方法1. 500 to 620 for pure aluminum material
Pure aluminum having excellent pitting corrosion resistance, which is characterized by performing a heat treatment of cooling at a cooling rate of 5 ° C / min or more after heating at a temperature of ℃, and further performing a reheating treatment of heating at 180 to 380 ° C. Material manufacturing method
に皮材としてクラッドされている純アルミニウム材に対
し、請求項１記載の加熱処理および再加熱処理を行うこ
とを特徴とする耐孔食性に優れた耐孔食性に優れた純ア
ルミニウム材の製造方法2. An excellent pitting corrosion resistance, characterized in that the pure aluminum material clad as a skin material on one or both sides of the aluminum alloy core material is subjected to the heat treatment and reheat treatment according to claim 1. For producing pure aluminum material with excellent pitting corrosion resistance
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12266296A JP3865819B2 (en) | 1996-04-19 | 1996-04-19 | Method for producing pure aluminum material with excellent pitting corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12266296A JP3865819B2 (en) | 1996-04-19 | 1996-04-19 | Method for producing pure aluminum material with excellent pitting corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09287062A true JPH09287062A (en) | 1997-11-04 |
| JP3865819B2 JP3865819B2 (en) | 2007-01-10 |
Family
ID=14841538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12266296A Expired - Fee Related JP3865819B2 (en) | 1996-04-19 | 1996-04-19 | Method for producing pure aluminum material with excellent pitting corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3865819B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005028153A1 (en) * | 2003-09-18 | 2005-03-31 | Kobe Alcoa Transportation Products Ltd. | Aluminum alloy composite for brazing and heat exchanger including the same |
| JP2014055326A (en) * | 2012-09-12 | 2014-03-27 | Uacj Corp | Aluminum alloy clad material, heat exchanger, and method for producing heat exchanger |
-
1996
- 1996-04-19 JP JP12266296A patent/JP3865819B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005028153A1 (en) * | 2003-09-18 | 2005-03-31 | Kobe Alcoa Transportation Products Ltd. | Aluminum alloy composite for brazing and heat exchanger including the same |
| EP1666190A1 (en) * | 2003-09-18 | 2006-06-07 | Kobe Alcoa Transportation Products Ltd. | Aluminum alloy composite for brazing and heat exchanger including the same |
| EP1666190A4 (en) * | 2003-09-18 | 2007-02-21 | Kobe Alcoa Transp Products Ltd | Aluminum alloy composite for brazing and heat exchanger including the same |
| US7387844B2 (en) | 2003-09-18 | 2008-06-17 | Kabushiki Kaisha Kobe Seiko Sho | Aluminum alloy composite for brazing and heat exchanger including the same |
| JP2014055326A (en) * | 2012-09-12 | 2014-03-27 | Uacj Corp | Aluminum alloy clad material, heat exchanger, and method for producing heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3865819B2 (en) | 2007-01-10 |
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