JP2001071172A - Brazing sheet having excellent corrosion resistance - Google Patents
Brazing sheet having excellent corrosion resistanceInfo
- Publication number
- JP2001071172A JP2001071172A JP25209899A JP25209899A JP2001071172A JP 2001071172 A JP2001071172 A JP 2001071172A JP 25209899 A JP25209899 A JP 25209899A JP 25209899 A JP25209899 A JP 25209899A JP 2001071172 A JP2001071172 A JP 2001071172A
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- corrosion resistance
- aluminum alloy
- core material
- based aluminum
- 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
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、耐食性が優れたブ
レージングシートに関し、特に、自動車用熱交換器等に
好適な耐食性が優れたブレージングシートに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing sheet excellent in corrosion resistance, and more particularly to a brazing sheet excellent in corrosion resistance suitable for heat exchangers for automobiles and the like.
【０００２】[0002]
【従来の技術】従来、ろう付に使用される自動車熱交換
器用材料の芯材には３００３等のＡｌ−Ｍｎ系合金が使
用され、ろう材には４３４３等のＡｌ−Ｓｉ系アルミニ
ウム合金が使用され、水環境に接触する箇所については
７０７２等のＡｌ−Ｚｎ系アルミニウム合金からなる皮
材が使用されている。2. Description of the Related Art Conventionally, an Al-Mn alloy such as 3003 is used as a core material of an automotive heat exchanger material used for brazing, and an Al-Si aluminum alloy such as 4343 is used as a brazing material. A skin material made of an Al-Zn-based aluminum alloy such as 7072 is used for a portion that comes into contact with the water environment.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上述のろう付
に使用される自動車熱交換器用材料の構成における耐食
性は十分でなく、より一層の薄肉化は困難であるという
問題点がある。However, there is a problem that the corrosion resistance of the material of the heat exchanger for automobile used in the above-mentioned brazing is not sufficient, and it is difficult to further reduce the wall thickness.
【０００４】本発明はかかる問題点に鑑みてなされたも
のであって、薄板においても高耐食性を有する耐食性が
優れたブレージングシートを提供することを目的とす
る。The present invention has been made in view of the above problems, and an object of the present invention is to provide a brazing sheet having high corrosion resistance and excellent corrosion resistance even in a thin plate.
【０００５】[0005]
【課題を解決するための手段】本発明に係る耐食性が優
れたブレージングシートは、Ａｌ−Ｍｎ系アルミニウム
合金からなる芯材と、前記芯材の片面に形成されたＡｌ
−Ｓｉ−Ｚｎ系アルミニウム合金又はＡｌ−Ｓｉ系アル
ミニウム合金からなる第１のろう材と、前記芯材の他面
に形成されたＡｌ−Ｓｉ−Ｚｎ系アルミニウム合金から
なる第２のろう材と、を有し、前記第１のろう材又は第
２のろう材に含まれるＺｎの含有量が夫々３．５重量％
以下であり、ろう付後に前記芯材内に残存するＺｎの無
拡散層の厚さが４０μｍ以上であることを特徴とする。According to the present invention, there is provided a brazing sheet having excellent corrosion resistance, comprising a core made of an Al-Mn-based aluminum alloy, and an Al formed on one surface of the core.
A first brazing material made of a -Si-Zn-based aluminum alloy or an Al-Si-based aluminum alloy, and a second brazing material made of an Al-Si-Zn-based aluminum alloy formed on the other surface of the core material; And the content of Zn contained in the first brazing material or the second brazing material is 3.5% by weight, respectively.
The thickness of the non-diffusion layer of Zn remaining in the core after brazing is 40 μm or more.
【０００６】本発明に係る他の耐食性が優れたブレージ
ングシートは、Ａｌ−Ｍｎ系アルミニウム合金からなる
芯材と、前記芯材の片面に形成されたＡｌ−Ｓｉ−Ｚｎ
系アルミニウム合金又はＡｌ−Ｓｉ系アルミニウム合金
からなるろう材と、前記芯材の他面に形成されたＡｌ−
Ｚｎ系アルミニウム合金からなる皮材と、を有し、前記
ろう材又は前記皮材に含まれるＺｎの含有量が夫々３．
５重量％以下であり、ろう付後に前記芯材内に残存する
Ｚｎの無拡散層の厚さが４０μｍ以上であることを特徴
とする。[0006] Another brazing sheet having excellent corrosion resistance according to the present invention is a core material made of an Al-Mn-based aluminum alloy, and an Al-Si-Zn formed on one surface of the core material.
Brazing material made of an aluminum-based alloy or an Al-Si-based aluminum alloy, and an Al-
2. a skin material made of a Zn-based aluminum alloy, and the content of Zn contained in the brazing material or the skin material is 3.
5 wt% or less, and the thickness of the non-diffusion layer of Zn remaining in the core material after brazing is 40 μm or more.
【０００７】本発明においては、芯材の片面にＡｌ−Ｓ
ｉ−Ｚｎ系アルミニウム合金又はＡｌ−Ｓｉ系アルミニ
ウム合金からなる第１のろう材を形成し、残りの面にＡ
ｌ−Ｓｉ−Ｚｎ系アルミニウム合金からなる第２のろう
材を形成する構成とし、この第１のろう材及び第２のろ
う材に含有されるＺｎがろう付加熱時に芯材に拡散した
場合、この拡散したＺｎが芯材中央部で重なると電位が
漸次卑となり耐食性が劣化するが、芯材内に厚さが４０
μｍ以上のＺｎの無拡散層を残存させることにより電位
が漸次卑となることを防ぐことができるため、耐食性を
向上させることができる。[0007] In the present invention, the Al-S
A first brazing material made of an i-Zn-based aluminum alloy or an Al-Si-based aluminum alloy is formed, and A
When a second brazing material made of an l-Si-Zn-based aluminum alloy is formed, and Zn contained in the first brazing material and the second brazing material diffuses into the core material at the time of brazing addition heat, If the diffused Zn overlaps at the center of the core material, the potential gradually becomes lower and the corrosion resistance deteriorates.
By leaving the non-diffusion layer of Zn having a thickness of at least μm, the potential can be prevented from becoming gradually lower, so that the corrosion resistance can be improved.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施例に係る耐食
性が優れたブレージングシートについて添付の図面を参
照して詳細に説明する。図１（ａ）は本発明の実施例に
係るブレージングシートを示す断面図であり、（ｂ）は
縦軸にＺｎ濃度、横軸に位置をとり、図１（ａ）に示す
ブレージングシートのＡ−Ａ線におけるＺｎ濃度分布を
示すグラフ図である。図２（ａ）は本発明の実施例に係
るブレージングシートの変形例を示す断面図であり、
（ｂ）は縦軸にＺｎ濃度、横軸に位置をとり、図２
（ａ）に示すブレージングシートのＡ−Ａ線におけるＺ
ｎ濃度分布を示すグラフ図である。なお。図１（ｂ）及
び図２（ｂ）中で、Ｆは無拡散層を示し、Ｐはブレージ
ングシートの端面位置を示し、Ｗは芯材の厚さを示す。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a brazing sheet having excellent corrosion resistance according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1A is a cross-sectional view showing a brazing sheet according to an embodiment of the present invention, and FIG. 1B shows the Zn concentration on the vertical axis and the position on the horizontal axis, and the A of the brazing sheet shown in FIG. It is a graph which shows the Zn concentration distribution in the -A line. FIG. 2A is a cross-sectional view illustrating a modified example of the brazing sheet according to the embodiment of the present invention.
2B shows the Zn concentration on the vertical axis and the position on the horizontal axis.
Z of the brazing sheet shown in FIG.
It is a graph which shows n density distribution. In addition. 1 (b) and 2 (b), F indicates a non-diffusion layer, P indicates the end face position of the brazing sheet, and W indicates the thickness of the core material.
【０００９】図１（ａ）に示すように、本実施例に係る
ブレージングシートでは、芯材１の片面にＺｎを含有す
るろう材２が積層されている。残りの面にはＺｎを含有
するろう材２又は皮材３が積層されている。このような
ブレージングシートではろう材２又は皮材３に添加され
たＺｎがろう付加熱により芯材１内に向かって拡散す
る。両面のろう材２又は皮材３の端面位置Ｐ及び原点位
置から拡散してきたＺｎが芯材１中央部で重なる場合、
腐食が芯材１中央部まで進行するとそれ以降、電位が漸
次卑となるため、腐食速度が速くなり耐食性が低下す
る。しかし、図１（ｂ）に示すように、芯材１の厚さＷ
内にＺｎの無拡散層Ｆが残存する場合、拡散Ｚｎが芯材
１内で重なることがなくなり、電位が漸次卑とはならな
い。このため、耐食性が向上する。As shown in FIG. 1A, in a brazing sheet according to the present embodiment, a brazing material 2 containing Zn is laminated on one surface of a core material 1. On the remaining surface, a brazing material 2 or a skin material 3 containing Zn is laminated. In such a brazing sheet, Zn added to the brazing material 2 or the skin material 3 is diffused into the core material 1 by the additional heat of the brazing material. When Zn diffused from the end face position P and the origin position of the brazing material 2 or the skin material 3 on both surfaces overlaps at the center of the core material 1,
When the corrosion progresses to the center of the core material 1, the potential gradually becomes lower thereafter, so that the corrosion rate is increased and the corrosion resistance is reduced. However, as shown in FIG.
When the non-diffusion layer F of Zn remains therein, the diffusion Zn does not overlap in the core material 1 and the potential does not become gradually lower. For this reason, corrosion resistance improves.
【００１０】また、本実施例においては、図２（ａ）に
示すように、芯材１の片面にＺｎを含有しないろう材２
が積層され、他面にはＺｎを含有するろう材２又は皮材
３が積層される構成とすることもできる。このように形
成されたブレージングシートでは片面のろう材２又は皮
材３の端面位置Ｐから拡散してきたＺｎがろう材２の表
面まで拡散した場合、ブレージングシートの板厚方向に
おいて、Ｚｎ濃度が高いほうから漸次電位は貴となる。
この場合、電位勾配が卑から貴方向における耐食性は良
好であるが、電位勾配が貴から卑方向における耐食性は
低下する。しかし、図２（ｂ）に示すように、芯材１内
にＺｎの無拡散層Ｆが残存する場合、板厚方向において
Ｚｎの拡散がろう材２の表面まで達している場合に比べ
腐食が遅くなるため耐食性が向上する。In this embodiment, as shown in FIG. 2 (a), a brazing material 2 containing no Zn
Are laminated, and on the other surface, a brazing material 2 or a skin material 3 containing Zn is laminated. In the brazing sheet thus formed, when Zn diffused from the end surface position P of the brazing material 2 or the skin material 3 on one surface diffuses to the surface of the brazing material 2, the Zn concentration is high in the thickness direction of the brazing sheet. From the side, the potential gradually becomes higher.
In this case, the corrosion resistance in the potential gradient from noble to noble is good, but the corrosion resistance in the potential gradient from noble to noble decreases. However, as shown in FIG. 2B, when the non-diffusion layer F of Zn remains in the core material 1, corrosion is more likely to occur in the thickness direction than in the case where the diffusion of Zn reaches the surface of the brazing material 2. Corrosion resistance is improved due to slowing down.
【００１１】なお、本実施例において、例えば、ブレー
ジングシートはＡｌ−Ｍｎ系アルミニウム合金からなる
芯材１の両面にＡｌ−Ｓｉ−Ｚｎ系アルミニウム合金か
らなるろう材２が積層されたものである。また、芯材１
の片面にＡｌ−Ｓｉ−Ｚｎ系アルミニウム合金からなる
ろう材２が積層され、芯材１の他面にＡｌ−Ｓｉ系アル
ミニウム合金からなるろう材２又はＡｌ−Ｚｎ系アルミ
ニウム合金からなる皮材３が積層されたものである。In this embodiment, for example, the brazing sheet is formed by laminating a brazing material 2 made of an Al-Si-Zn-based aluminum alloy on both surfaces of a core material 1 made of an Al-Mn-based aluminum alloy. In addition, core material 1
The brazing material 2 made of an Al-Si-Zn-based aluminum alloy is laminated on one surface of the core material 1, and the brazing material 2 made of an Al-Si-based aluminum alloy or the skin material 3 made of an Al-Zn-based aluminum alloy Are laminated.
【００１２】以下、ろう材又は皮材のＺｎ含有量及びろ
う付後の芯材におけるＺｎの無拡散層の厚さの限定理由
について説明する。The reason for limiting the Zn content of the brazing material or the cladding material and the thickness of the non-diffusion layer of Zn in the core material after brazing will be described below.
【００１３】ろう材又は皮材のＺｎ含有量：３．５重量％以下 ろう材又は皮材に添加されたＺｎはろう付加熱により芯
材の中央部方向へ拡散する。拡散Ｚｎによりブレージン
グシート表面から深さ方向へ漸次電位は貴となるため、
深さ方向への腐食の進行は抑制され、耐食性は向上す
る。ろう材又は皮材のＺｎ含有量が３．５重量％を超え
ると犠牲陽極効果が大きくなりすぎるため、腐食速度が
増大し、かえって耐食性が低下する。また、Ｚｎ含有量
の増大と共にＺｎ拡散距離も増加し、更にろう材にＺｎ
を含有する場合、ろう材の融点の低下に起因するエロー
ジョンが増加するため、溶融したろう材が芯材の粒界に
拡散して激しく侵食し、ろう付部の欠陥又は変形の原因
となる。このため、薄肉化に際しては、所定のＺｎの無
拡散層も確保しにくくなる。従って、ろう材又は皮材の
Ｚｎ含有量は３．５重量％以下とする。 Zn content of the brazing material or skin material: 3.5% by weight or less Zn added to the brazing material or skin material diffuses toward the center of the core material by the heat of the brazing. Because the diffusion potential makes the potential gradually increase in the depth direction from the surface of the brazing sheet,
The progress of corrosion in the depth direction is suppressed, and the corrosion resistance is improved. If the Zn content of the brazing material or the cladding material exceeds 3.5% by weight, the sacrificial anode effect becomes too large, so that the corrosion rate increases and the corrosion resistance decreases. Further, as the Zn content increases, the Zn diffusion distance also increases.
In the case of containing, the erosion due to the lowering of the melting point of the brazing material increases, so that the molten brazing material diffuses into the grain boundaries of the core material and erodes violently, causing defects or deformation of the brazed portion. For this reason, when thinning, it becomes difficult to secure a predetermined non-diffusion layer of Zn. Therefore, the Zn content of the brazing material or the skin material is set to 3.5% by weight or less.
【００１４】ろう付後芯材内に残存するＺｎの無拡散層
の厚さ：４０μｍ以上 図１（ａ）に示すように、芯材１の両面にＺｎが含有さ
れたろう材２又は皮材３が形成された場合、図１（ｂ）
に示すように、ろう材２又は皮材３に添加されたＺｎが
ろう付加熱により芯材１内に向かって拡散する。芯材１
の両面に形成されたろう材２又は皮材３から拡散してき
たＺｎが芯材１中央部で重なる場合、腐食が芯材１中央
部まで進行するとそれ以降、電位は漸次卑となるため、
腐食速度が速くなり、耐食性は低下する。このとき、芯
材１内に残存するＺｎの無拡散層Ｆの厚さが４０μｍ以
上であると電位は漸次卑とならず、耐食性が向上する。 Non-diffusion layer of Zn remaining in core material after brazing
As shown in FIG. 1A, when a brazing material 2 or a skin material 3 containing Zn is formed on both sides of a core material 1 as shown in FIG.
As shown in (2), Zn added to the brazing material 2 or the skin material 3 diffuses into the core material 1 by the heat of the brazing. Core material 1
When Zn diffused from the brazing material 2 or the skin material 3 formed on both sides of the core material 1 overlaps at the center of the core 1, the corrosion gradually progresses to the center of the core 1, and thereafter, the potential gradually becomes lower.
The corrosion rate increases and the corrosion resistance decreases. At this time, when the thickness of the non-diffusion layer F of Zn remaining in the core material 1 is 40 μm or more, the potential does not gradually become lower, and the corrosion resistance is improved.
【００１５】また、図２（ａ）に示すように、芯材１の
片面にＺｎが含有されたろう材２又は皮材３が形成さ
れ、残りの面にＺｎを含有しないろう材２が形成された
場合、図２（ｂ）に示すように、芯材１の片面に形成さ
れたろう材２又は皮材３から拡散してきたＺｎが反対側
のＺｎを含有しないろう材２の表面まで拡散した場合、
ブレージングシートの板厚方向でＺｎ濃度が高いほうか
ら漸次電位は貴となるため、電位勾配が卑から貴方向に
おける耐食性は良好であるが、電位勾配が貴から卑方向
における耐食性は低下する。このとき、芯材１内に残存
するＺｎの無拡散層Ｆの厚さが４０μｍ以上であると深
さ方向への腐食はＺｎ拡散が反対側のＺｎを含有しない
ろう材２の表面まで達している場合に比べ遅くなるた
め、耐食性が向上する。Ｚｎの無拡散層Ｆの厚さが４０
μｍ未満では、腐食の速度を低下させる効果が小さく、
耐食性の向上は望めない。従って、ろう付後芯材内に残
存するＺｎの無拡散層の厚さは４０μｍ以上とする。Further, as shown in FIG. 2A, a brazing material 2 or a skin material 3 containing Zn is formed on one surface of a core material 1 and a brazing material 2 containing no Zn is formed on the other surface. 2B, when Zn diffused from the brazing material 2 or the skin material 3 formed on one surface of the core material 1 diffuses to the surface of the brazing material 2 containing no Zn on the opposite side, as shown in FIG. ,
Since the potential gradually increases from the higher Zn concentration in the thickness direction of the brazing sheet, the corrosion resistance in the noble to noble potential gradient is good, but the corrosion resistance in the noble to noble potential gradient decreases. At this time, if the thickness of the non-diffusion layer F of Zn remaining in the core material 1 is 40 μm or more, the corrosion in the depth direction reaches the surface of the brazing material 2 which does not contain Zn and whose Zn diffusion is on the opposite side. Corrosion resistance is improved. The thickness of the non-diffusion layer F of Zn is 40
If it is less than μm, the effect of reducing the corrosion rate is small,
No improvement in corrosion resistance can be expected. Therefore, the thickness of the non-diffusion layer of Zn remaining in the core material after brazing is set to 40 μm or more.
【００１６】[0016]
【実施例】以下、本発明の耐食性が優れたブレージング
シートの実施例について、その耐食性を比較例と比較し
て具体的に説明する。EXAMPLES Examples of the brazing sheet of the present invention having excellent corrosion resistance will be specifically described below in comparison with comparative examples.
【００１７】ブレージングシートとして、芯材に外側ク
ラッド層及び内側クラッド層が形成された表１に示す化
学組成の供試材を使用した。これらの供試材のろう付条
件を変えて芯材に残存するＺｎの無拡散層の厚さを変化
させた。なお、ブレージングシートの板厚は０．３ｍｍ
であり、ろう材又は皮材のクラッド率は１０％である。
この表１に示されたブレージングシートの外面耐食性及
び内面耐食性について評価した。As a brazing sheet, a test material having a chemical composition shown in Table 1 in which an outer cladding layer and an inner cladding layer were formed on a core material was used. The thickness of the non-diffusion layer of Zn remaining in the core material was changed by changing the brazing conditions of these test materials. The thickness of the brazing sheet is 0.3 mm
And the cladding ratio of the brazing material or the cladding material is 10%.
The outer corrosion resistance and inner corrosion resistance of the brazing sheet shown in Table 1 were evaluated.
【００１８】外面耐食性については、１０００時間の塩
水噴射試験（ＳＳＴ：salt spraytesting）後の腐食深
さを評価した。Regarding the outer surface corrosion resistance, the corrosion depth after the salt spray test (SST) for 1000 hours was evaluated.
【００１９】内面腐食性については、ＯＹ水（Old Yok
ohama River Water）に２ヶ月浸漬した後の腐食深さ
を評価した。これらの結果を表２に示す。Regarding the inner surface corrosion, OY water (Old Yok
ohama River Water) for 2 months. Table 2 shows the results.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表２】 [Table 2]
【００２２】上記表２に示すように、実施例No.１乃至
１１は、外面腐食において貫通腐食が発生せず高い耐食
性を示した。一方、比較例No.１２乃至１７は外面腐食
において貫通腐食又は板厚の７０％の腐食が発生し耐食
性が乏しかった。As shown in Table 2 above, Examples Nos. 1 to 11 exhibited high corrosion resistance without penetrating corrosion in outer surface corrosion. On the other hand, Comparative Examples Nos. 12 to 17 were poor in corrosion resistance due to penetration corrosion or corrosion of 70% of the plate thickness in outer surface corrosion.
【００２３】比較例No.１２はＺｎの含有量が本発明の
上限値を超え、Ｚｎの無拡散層の厚さが本発明の下限値
未満であるため、外面腐食において貫通腐食が発生し耐
食性が乏しかった。In Comparative Example No. 12, since the Zn content exceeded the upper limit of the present invention and the thickness of the non-diffusion layer of Zn was less than the lower limit of the present invention, penetration corrosion occurred in outer surface corrosion and corrosion resistance was increased. Was scarce.
【００２４】比較例No.１３はＺｎの含有量が本発明の
上限値を超え、Ｚｎの無拡散層の厚さが本発明の下限値
未満であるため、外面腐食において腐食深さが２２０μ
ｍにも達し耐食性が乏しかった。In Comparative Example No. 13, since the Zn content exceeded the upper limit of the present invention and the thickness of the non-diffusion layer of Zn was less than the lower limit of the present invention, the corrosion depth in outer surface corrosion was 220 μm.
m, and the corrosion resistance was poor.
【００２５】比較例No.１４は供試材の組成は本発明の
範囲内であるが、Ｚｎの無拡散層の厚さが本発明の下限
値未満であるため、外面腐食において貫通腐食が発生し
耐食性が乏しかった。In Comparative Example No. 14, although the composition of the test material was within the range of the present invention, since the thickness of the non-diffusion layer of Zn was less than the lower limit of the present invention, penetration corrosion occurred in external corrosion. And the corrosion resistance was poor.
【００２６】比較例No.１５は供試材の組成は本発明の
範囲内であるが、Ｚｎの無拡散層の厚さが本発明の下限
値未満であるため、外面腐食において貫通腐食が発生し
耐食性が乏しかった。In Comparative Example No. 15, the composition of the test material was within the range of the present invention, but since the thickness of the non-diffusion layer of Zn was less than the lower limit of the present invention, penetration corrosion occurred in outer surface corrosion. And the corrosion resistance was poor.
【００２７】比較例No.１６は供試材の組成は本発明の
範囲内であるが、Ｚｎの無拡散層の厚さが本発明の下限
値未満であるため、外面腐食において貫通腐食が発生し
耐食性が乏しかった。In Comparative Example No. 16, the composition of the test material was within the range of the present invention, but since the thickness of the non-diffusion layer of Zn was less than the lower limit of the present invention, penetration corrosion occurred in the external corrosion. And the corrosion resistance was poor.
【００２８】比較例No.１７は外側クラッド層のＺｎの
含有量が本発明の上限値を超え、Ｚｎの無拡散層の厚さ
が本発明の下限値未満であるため、外面腐食において腐
食深さが２３０μｍにも達し耐食性が乏しかった。In Comparative Example No. 17, the Zn content of the outer cladding layer exceeded the upper limit of the present invention, and the thickness of the non-diffusion layer of Zn was less than the lower limit of the present invention. Had reached 230 μm, and the corrosion resistance was poor.
【００２９】[0029]
【発明の効果】以上詳述したように本発明によれば、ろ
う材又は皮材のＺｎ含有量及び芯材のろう付後の無拡散
層の厚さを適切に規定したので、耐食性が向上し、薄板
であっても高い耐食性を得ることができる。As described above in detail, according to the present invention, the Zn content of the brazing material or the cladding material and the thickness of the non-diffusion layer after the brazing of the core material are appropriately specified, so that the corrosion resistance is improved. However, high corrosion resistance can be obtained even with a thin plate.
【図１】（ａ）は本発明の実施例に係るブレージングシ
ートを示す断面図であり、（ｂ）は縦軸にＺｎ濃度、横
軸に位置をとり、図１（ａ）に示すブレージングシート
のＡ−Ａ線におけるＺｎ濃度分布を示すグラフ図であ
る。FIG. 1A is a cross-sectional view showing a brazing sheet according to an embodiment of the present invention, and FIG. 1B is a brazing sheet shown in FIG. FIG. 4 is a graph showing a Zn concentration distribution along the line AA in FIG.
【図２】（ａ）は本発明の実施例に係るブレージングシ
ートの変形例を示す断面図であり、（ｂ）は縦軸にＺｎ
濃度、横軸に位置をとり、図２（ａ）に示すブレージン
グシートのＡ−Ａ線におけるＺｎ濃度分布を示すグラフ
図である。FIG. 2A is a cross-sectional view showing a modified example of the brazing sheet according to the embodiment of the present invention, and FIG.
FIG. 3 is a graph showing the Zn concentration distribution along the line AA of the brazing sheet shown in FIG.
１；芯材 ２；ろう材 ３；皮材 Ｆ；無拡散層 Ｐ；端面位置 Ｗ；芯材の厚さ 1; core material 2; brazing material 3; skin material F; non-diffusion layer P; end face position W; thickness of core material
フロントページの続き Ｆターム(参考） 4F100 AB10A AB10B AB10C AB11A AB11C AB14B AB18A AB18C AB31A AB31B AB31C BA03 BA07 BA10A BA10C BA27 GB32 JB02 JJ01 YY00A YY00C Continued on front page F term (reference) 4F100 AB10A AB10B AB10C AB11A AB11C AB14B AB18A AB18C AB31A AB31B AB31C BA03 BA07 BA10A BA10C BA27 GB32 JB02 JJ01 YY00A YY00C
Claims (2)
芯材と、前記芯材の片面に形成されたＡｌ−Ｓｉ−Ｚｎ
系アルミニウム合金又はＡｌ−Ｓｉ系アルミニウム合金
からなる第１のろう材と、前記芯材の他面に形成された
Ａｌ−Ｓｉ−Ｚｎ系アルミニウム合金からなる第２のろ
う材と、を有し、前記第１のろう材又は第２のろう材に
含まれるＺｎの含有量が夫々３．５重量％以下であり、
ろう付後に前記芯材内に残存するＺｎの無拡散層の厚さ
が４０μｍ以上であることを特徴とする耐食性が優れた
ブレージングシート。1. A core made of an Al—Mn-based aluminum alloy, and an Al—Si—Zn formed on one surface of the core.
A first brazing material made of an aluminum-based aluminum alloy or an Al-Si-based aluminum alloy, and a second brazing material made of an Al-Si-Zn-based aluminum alloy formed on the other surface of the core material, The content of Zn contained in the first brazing material or the second brazing material is 3.5% by weight or less, respectively.
A brazing sheet having excellent corrosion resistance, wherein a thickness of a non-diffusion layer of Zn remaining in the core material after brazing is 40 μm or more.
芯材と、前記芯材の片面に形成されたＡｌ−Ｓｉ−Ｚｎ
系アルミニウム合金又はＡｌ−Ｓｉ系アルミニウム合金
からなるろう材と、前記芯材の他面に形成されたＡｌ−
Ｚｎ系アルミニウム合金からなる皮材と、を有し、前記
ろう材又は前記皮材に含まれるＺｎの含有量が夫々３．
５重量％以下であり、ろう付後に前記芯材内に残存する
Ｚｎの無拡散層の厚さが４０μｍ以上であることを特徴
とする耐食性が優れたブレージングシート。2. A core material made of an Al—Mn-based aluminum alloy, and an Al—Si—Zn formed on one surface of the core material.
Brazing material made of an aluminum-based alloy or an Al-Si-based aluminum alloy, and an Al-
2. a skin material made of a Zn-based aluminum alloy, and the content of Zn contained in the brazing material or the skin material is 3.
A brazing sheet excellent in corrosion resistance, wherein the thickness of the non-diffusion layer of Zn remaining in the core material after brazing is 40 μm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25209899A JP2001071172A (en) | 1999-09-06 | 1999-09-06 | Brazing sheet having excellent corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25209899A JP2001071172A (en) | 1999-09-06 | 1999-09-06 | Brazing sheet having excellent corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001071172A true JP2001071172A (en) | 2001-03-21 |
Family
ID=17232503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25209899A Pending JP2001071172A (en) | 1999-09-06 | 1999-09-06 | Brazing sheet having excellent corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001071172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1484571A2 (en) | 2003-06-06 | 2004-12-08 | Denso Corporation | Aluminium heat exchanger excellent in corrosion resistance |
-
1999
- 1999-09-06 JP JP25209899A patent/JP2001071172A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1484571A2 (en) | 2003-06-06 | 2004-12-08 | Denso Corporation | Aluminium heat exchanger excellent in corrosion resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101146921B (en) | Aluminum alloy plate and heat exchanger formed by using same | |
| EP1038984B1 (en) | Corrosion protective sacrificial aluminum alloy for heat exchanger and aluminum alloy composite material highly resistant to corrosion for heat exchanger and heat exchanger using said composite material | |
| US6451453B1 (en) | Aluminum alloy strip or tube for the manufacture of brazed heat exchangers | |
| US5837388A (en) | Aluminum alloy solder material, its manufacturing method, brazing sheet using this material, and method of manufacturing aluminum alloy heat exchanger using this sheet | |
| JP2007327094A (en) | Clad material of high-strength aluminum alloy excellent in brazability for heat exchanger | |
| JP2007131872A (en) | Aluminum alloy clad material for heat exchanger | |
| JP3772035B2 (en) | Aluminum alloy clad material for heat exchangers with excellent erosion and corrosion resistance | |
| JP2000309837A (en) | Aluminum alloy clad material for heat exchanger excellent in erosion and corrosion resistance | |
| JP2685775B2 (en) | Aluminum alloy composite material with excellent pitting resistance | |
| JP2007327093A (en) | Clad material of high-strength aluminum alloy excellent in brazability for heat exchanger | |
| JPS5925158B2 (en) | Brazed aluminum heat exchanger | |
| JP2001071172A (en) | Brazing sheet having excellent corrosion resistance | |
| JPH11172357A (en) | Corrosion resistant aluminum alloy clad plate for vacuum brazing | |
| JPH1161306A (en) | Aluminum alloy clad material for heat exchanger | |
| JPH11209837A (en) | Sacrificial corrosionproof aluminum alloy for heat exchanger and aluminum alloy composite material for heat exchanger using this | |
| JP3794820B2 (en) | High corrosion resistance aluminum alloy brazing sheet | |
| JP4238957B2 (en) | Aluminum alloy brazing sheet for heat exchanger tubes with excellent strength and corrosion resistance | |
| JPH0797651A (en) | Production of aluminum alloy brazing sheet for heat exchanger and heat exchanger made of aluminum alloy | |
| JPH1161305A (en) | Aluminum alloy clad material for heat exchanger | |
| JP2933382B2 (en) | High strength and high corrosion resistance aluminum alloy clad material for heat exchanger | |
| JPH10212538A (en) | High corrosion resistant aluminum alloy composite material for heat exchanger | |
| JP2006176851A (en) | High-strength aluminum alloy plate material for heat exchanger having excellent erosion resistance, heat exchanger and method for producing high-strength aluminum alloy plate material | |
| JP3830066B2 (en) | Sacrificial corrosion-resistant aluminum alloy composite | |
| JP2000034532A (en) | Composite material for heat exchanger made of aluminum alloy | |
| JP3538507B2 (en) | Aluminum alloy clad material for heat exchanger with excellent alkali corrosion resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Effective date: 20060802 Free format text: JAPANESE INTERMEDIATE CODE: A621 |
|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20070727 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20070727 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20080523 |
|
| A977 | Report on retrieval |
Effective date: 20081104 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081111 |
|
| A521 | Written amendment |
Effective date: 20090113 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090630 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090831 |
|
| A02 | Decision of refusal |
Effective date: 20091006 Free format text: JAPANESE INTERMEDIATE CODE: A02 |