JPH0565588A - Aluminum material for brazing excellent in corrosion resistance - Google Patents
Aluminum material for brazing excellent in corrosion resistanceInfo
- Publication number
- JPH0565588A JPH0565588A JP22751191A JP22751191A JPH0565588A JP H0565588 A JPH0565588 A JP H0565588A JP 22751191 A JP22751191 A JP 22751191A JP 22751191 A JP22751191 A JP 22751191A JP H0565588 A JPH0565588 A JP H0565588A
- Authority
- JP
- Japan
- Prior art keywords
- point
- aluminum
- brazing
- skin material
- alloy
- 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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- Prevention Of Electric Corrosion (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ラジエター、カーヒ
ーター、水冷オイルクーラー等のアルミニウム製熱交換
器のチューブ材等として使用されるアルミニウム材、特
にろう付加熱に供されるとともに、ろう付後の耐食性に
優れているアルミニウム材に関する。This invention relates to an aluminum material used as a tube material of a heat exchanger made of aluminum such as a radiator, a car heater, a water-cooled oil cooler, etc. Relates to an aluminum material having excellent corrosion resistance.
【０００２】[0002]
【従来の技術】上記のようなアルミニウム製熱交換器、
特に媒体として水が用いられるような場合には、該水を
流通させるチューブ材等として耐食性に優れたアルミニ
ウム材を用いる必要がある。2. Description of the Related Art An aluminum heat exchanger as described above,
Particularly, when water is used as a medium, it is necessary to use an aluminum material having excellent corrosion resistance as a tube material or the like through which the water flows.
【０００３】かかる耐食性を有するアルミニウム材とし
て、従来、Ａ３００３アルミニウム合金等からなる芯材
の少なくとも片面に、１wt％程度のＺｎ（亜鉛）を含有
するＡｌ−Ｚｎ系合金皮材がクラッドされたものが用い
られ、このＡｌ−Ｚｎ系合金皮材が水と接する内面側に
位置するようにアルミニウム材を成形して使用してい
た。この理由は、アルミニウム製熱交換器の製造におい
て一般に実施されるろう付工程において、加熱により皮
材中のＺｎが芯材に拡散し、この拡散したＺｎの犠牲防
食効果による耐食性を期待するためである。As such an aluminum material having corrosion resistance, there has been conventionally used a core material made of an A3003 aluminum alloy or the like in which at least one surface is clad with an Al--Zn alloy skin material containing about 1 wt% Zn (zinc). The aluminum material was used by molding the aluminum material so that the Al—Zn alloy skin material was located on the inner surface side in contact with water. This is because Zn in the skin material is diffused into the core material by heating in the brazing process generally performed in the production of the aluminum heat exchanger, and corrosion resistance due to the sacrificial anticorrosion effect of the diffused Zn is expected. is there.
【０００４】[0004]
【発明が解決しようとする課題】ところで、熱交換器の
軽量化の要請に伴い、チューブ等を構成する上記アルミ
ニウム材に対しても薄肉化の要請が高まっており、これ
に応じてＡｌ−Ｚｎ系合金皮材も徐々に薄肉化され、５
０μｍ程度以下の肉厚となされる場合が多い。By the way, along with the demand for weight reduction of heat exchangers, there is an increasing demand for thinning of the above-mentioned aluminum materials forming tubes and the like. The system alloy skin material is also gradually thinned, and
In many cases, the wall thickness is about 0 μm or less.
【０００５】しかるに、Ａｌ−Ｚｎ系合金皮材の薄肉化
に伴いＺｎによる犠牲陽極効果が低下し、アルミニウム
材の耐食性が悪化するという欠点があった。However, there has been a drawback that the sacrificial anode effect due to Zn decreases as the thickness of the Al—Zn alloy skin material decreases, and the corrosion resistance of the aluminum material deteriorates.
【０００６】この発明は、かかる欠点を解消するために
なされたものであって、アルミニウムまたはアルミニウ
ム合金からなる芯材の少なくとも片面に、Ｚｎを含有す
るＡｌ−Ｚｎ系合金からなる皮材が被着形成されたろう
付用アルミニウム材において、薄肉化を可能としながら
も、なおかつろう付後の耐食性にも優れたものとなすこ
とを目的とするものである。The present invention has been made to solve the above drawbacks, and a skin material made of an Al-Zn alloy containing Zn is adhered to at least one surface of a core material made of aluminum or an aluminum alloy. It is an object of the formed aluminum material for brazing to make it possible to reduce the wall thickness and yet to have excellent corrosion resistance after brazing.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、発明者は、皮材中のＺｎの加熱拡散状態において、
アルミニウム材の表面Ｚｎ濃度と最大孔食深さとの関係
を調べるべく以下のような実験を行った。In order to achieve the above object, the inventor has found that Zn in a skin material is heated and diffused in the following manner.
The following experiment was conducted in order to investigate the relationship between the surface Zn concentration of the aluminum material and the maximum pitting depth.
【０００８】即ち、図２に示すように、Ａ３００３Ａｌ
合金からなる肉厚２ｍｍの芯材（１）の片面に、Ｚｎ量
を下記表１のように各種に変えた厚さ２０μｍのＡｌ−
Ｚｎ系合金皮材（２）がクラッドされた縦４０ｍｍ×横
８０ｍｍの５種類のアルミニウム材、及び上記芯材
（１）のみからなる同大のアルミニウム材を用意し、ろ
う付を想定した６００℃×５分の加熱を行った。That is, as shown in FIG. 2, A3003Al
On one surface of the core material (1) made of an alloy and having a thickness of 2 mm, the amount of Zn was changed to various values as shown in Table 1 below and the thickness of Al-
Five kinds of 40 mm long × 80 mm wide aluminum material clad with Zn-based alloy skin material (2) and an aluminum material of the same size consisting only of the core material (1) were prepared, and brazing was performed at 600 ° C. × 5 minutes heating was performed.
【０００９】[0009]
【表１】 [Table 1]
【００１０】次に、ＯＹ水（Ｃｌ- ：２００ｐｐｍ、Ｓ
Ｏ４ 2-：６０ｐｐｍ、Ｆｅ3+：３０ｐｐｍ、Ｃｕ2+：１
ｐｐｍ）中において９５℃×２５０時間の浸漬試験を行
い、試験後の各試料における表面Ｚｎ濃度（wt％）と最
大孔食深さ（μｍ）とを調べたところ、図３に示すグラ
フのとおりとなった。Next, OY water (Cl − : 200 ppm, S
O 4 2− : 60 ppm, Fe 3+ : 30 ppm, Cu 2+ : 1
(ppm)), a dipping test was performed at 95 ° C. for 250 hours, and the surface Zn concentration (wt%) and the maximum pitting depth (μm) of each sample after the test were examined, and as shown in the graph in FIG. Became.
【００１１】上記結果から、アルミニウム材の表面Ｚｎ
濃度が高くなるに従って、最大孔食深さが浅くなってお
り、ろう付後において十分な耐食性を発揮させるために
は、表面Ｚｎ濃度が０．８wt％以上必要であり、また表
面Ｚｎ濃度が２wt％を越えても犠牲防食効果の格別の増
大を期待し得ないばかりか、かえって初期腐食が激しく
なることがわかった。つまり、表面Ｚｎ濃度を０．８〜
２．０wt％程度に設定すべきことがわかった。From the above results, the surface Zn of the aluminum material
The higher the concentration, the shallower the maximum pitting corrosion depth. In order to exhibit sufficient corrosion resistance after brazing, the surface Zn concentration must be 0.8 wt% or more, and the surface Zn concentration is 2 wt%. It has been found that even if the ratio exceeds%, not only a special increase in the sacrificial anticorrosion effect cannot be expected, but also the initial corrosion becomes severe. That is, the surface Zn concentration is 0.8 to
It was found that it should be set to about 2.0 wt%.
【００１２】そこで、発明者はかかる知見に鑑み、ろう
付後の表面Ｚｎ濃度を０．８〜２．０wt％程度に制御す
べくさらに鋭意研究を重ねた結果、アルミニウム材にお
ける皮材中のＺｎ含有量と皮材の厚さとを予め所定範囲
に規定することでろう付後の表面Ｚｎ濃度の制御が可能
であることを新たに知見し、この発明を完成し得たもの
である。[0012] In view of the above finding, the inventor has conducted further diligent research to control the surface Zn concentration after brazing to about 0.8 to 2.0 wt%. The present invention has been completed by newly discovering that the surface Zn concentration after brazing can be controlled by previously defining the content and the thickness of the skin material within a predetermined range.
【００１３】即ち、この発明は、アルミニウムまたはア
ルミニウム合金からなる芯材の少なくとも片面に、Ｚｎ
を含有するＡｌ−Ｚｎ系合金からなる皮材が被着形成さ
れたろう付用アルミニウム材において、前記皮材に含有
されたＺｎ量と皮材の厚さとが、図１に示すように点Ａ
（１wt％、５０μｍ）、点Ｂ（１．２wt％、４０μ
ｍ）、点Ｃ（１．５wt％、２０μｍ）、点Ｄ（２wt％、
１５μｍ）、点Ｅ（３wt％、１０μｍ）、点Ｆ（５wt
％、５μｍ）、点Ｇ（５wt％、１５μｍ）、点Ｈ（４wt
％、２０μｍ）、点Ｉ（３wt％、３０μｍ）、点Ｊ
（２．５wt％、５０μｍ）で囲まれた範囲内の値に設定
されるとともに、皮材のＣｕ含有量が０．０５ｗｔ％以
下に規定されていることを特徴とする耐食性に優れたろ
う付用アルミニウム材を要旨とするものである。That is, according to the present invention, Zn is provided on at least one surface of a core material made of aluminum or an aluminum alloy.
In an aluminum material for brazing on which a skin material made of an Al-Zn alloy containing Al is adhered and formed, the amount of Zn contained in the skin material and the thickness of the skin material are point A as shown in FIG.
(1wt%, 50μm), Point B (1.2wt%, 40μ
m), point C (1.5 wt%, 20 μm), point D (2 wt%,
15 μm), point E (3 wt%, 10 μm), point F (5 wt
%, 5 μm), point G (5 wt%, 15 μm), point H (4 wt
%, 20 μm), point I (3 wt%, 30 μm), point J
For brazing with excellent corrosion resistance, which is set to a value within the range surrounded by (2.5 wt%, 50 μm) and the Cu content of the skin material is specified to be 0.05 wt% or less. The main point is aluminum.
【００１４】まず、芯材について説明すると、芯材の組
成は特に限定されることはなく、Ａ３００３、３００
４、３００５、３００９等各種のアルミニウムまたはア
ルミニウム合金を使用すれば良い。ただ、望ましくは芯
材中に０．１wt％以上のＣｕ（銅）を含有させるのが良
い。これは、芯材にＣｕを含有させることで芯材の電位
を貴とし、これによりＡｌ−Ｚｎ系合金皮材との電位差
を大きく確保し、もってＡｌ−Ｚｎ系合金皮材の犠牲陽
極効果を十分に発揮させるためである。First, the core material will be described. The composition of the core material is not particularly limited, and A3003 and A300 can be used.
Various kinds of aluminum or aluminum alloy such as 4, 3005, 3009 may be used. However, it is desirable that 0.1% by weight or more of Cu (copper) is contained in the core material. This is because the potential of the core material is made noble by containing Cu in the core material, and thereby a large potential difference with the Al-Zn alloy skin material is secured, and thus the sacrificial anode effect of the Al-Zn alloy skin material is obtained. This is to make full use of it.
【００１５】Ａｌ−Ｚｎ系合金皮材において、Ｚｎ含有
量と皮材肉厚とは図１のグラフにおいて斜線で示す領域
内の値に設定されなければならない。即ち、図１に示す
グラフは、横軸に皮材中のＺｎ含有量（wt％）を採る一
方、縦軸は皮材厚さ（μｍ）を表したグラフであり、斜
線で示す領域はＡ〜Ｊの各点を直線で結ぶことにより形
成されたものである。ここで各点の座標を示すと、Ａ
（１wt％、５０μｍ）、Ｂ（１．２wt％、４０μｍ）、
Ｃ（１．５wt％、２０μｍ）、Ｄ（２wt％、１５μ
ｍ）、Ｅ（３wt％、１０μｍ）、Ｆ（５wt％、５μ
ｍ）、Ｇ（５wt％、１５μｍ）、Ｈ（４wt％、２０μ
ｍ）、Ｉ（３wt％、３０μｍ）、Ｊ（２．５wt％、５０
μｍ）である。ここに、点Ａ〜Ｆを結ぶ線はろう付後に
おける表面Ｚｎ濃度が約０．８wt％程度となる境界線を
示しており、これを下回るＺｎ含有量、皮材厚さではろ
う付後の表面Ｚｎ濃度が０．８wt％よりも小さくなり、
孔食深さが深くなり、ひいては所期する耐食性を発揮で
きない。一方点Ｇ〜Ｊを結ぶ線は、ろう付後における表
面Ｚｎ濃度が約２．０wt％程度となる境界線を示してお
り、これを上回るＺｎ含有量、皮材厚さに設定すると、
初期腐食が激しくなり、貫通孔食までの寿命が短かくな
る。また、点Ａと点Ｊを結ぶ線は皮材の厚さが５０μｍ
であることを示しており、厚さが５０μｍを越えるとア
ルミニウム材の薄肉化による熱交換器の軽量化、コスト
低減の要請に対処できない。従って、皮材の厚さは最大
５０μｍとした。また、点Ｆと点Ｇを結ぶ線は、Ｚｎ含
有量が５wt％であることを示しており、Ｚｎ含有量が５
wt％を越えると皮材の融点が低下してろう付加熱時に局
部溶解の危険がある。このため、皮材中のＺｎ含有量は
５wt％以下とした。このように、皮材のＺｎ含有量、厚
さを点Ａ〜Ｊを結ぶ線で囲まれた領域に設定した場合に
のみ、ろう付後に優れた耐食性を発揮させることがで
き、かつ薄肉化が可能でろう付時の局部溶解を防ぐこと
ができる。特に好ましくは、点Ｋ（１．５wt％、３０μ
ｍ）、Ｌ（２wt％、２０μｍ）、Ｍ（３wt％、１５μ
ｍ）、Ｎ（３wt％、２０μｍ）、Ｏ（２．５wt％、３０
μｍ）を結ぶ線で囲まれた領域に設定するのが良い。In the Al—Zn alloy skin material, the Zn content and the skin material thickness must be set to values within the region shown by the diagonal lines in the graph of FIG. That is, in the graph shown in FIG. 1, the horizontal axis represents the Zn content (wt%) in the skin material, while the vertical axis represents the skin material thickness (μm), and the hatched area is A It is formed by connecting the points J to J with a straight line. Here are the coordinates of each point: A
(1 wt%, 50 μm), B (1.2 wt%, 40 μm),
C (1.5wt%, 20μm), D (2wt%, 15μ
m), E (3 wt%, 10 μm), F (5 wt%, 5 μ
m), G (5 wt%, 15 μm), H (4 wt%, 20 μ
m), I (3 wt%, 30 μm), J (2.5 wt%, 50
μm). Here, the line connecting the points A to F shows a boundary line at which the surface Zn concentration after brazing becomes about 0.8 wt%, and the Zn content and skin material thickness below this are those after brazing. The surface Zn concentration becomes smaller than 0.8 wt%,
The pitting depth becomes deeper, and the desired corrosion resistance cannot be achieved. On the other hand, the line connecting the points G to J indicates a boundary line at which the surface Zn concentration after brazing is about 2.0 wt%, and when the Zn content and skin material thickness exceeding this are set,
The initial corrosion becomes severe and the life until through pitting corrosion becomes short. The line connecting points A and J has a skin material thickness of 50 μm.
If the thickness exceeds 50 μm, it is impossible to meet the demands for weight reduction and cost reduction of the heat exchanger due to thinning of the aluminum material. Therefore, the maximum thickness of the skin material is 50 μm. Also, the line connecting the points F and G indicates that the Zn content is 5 wt%, and the Zn content is 5 wt%.
If it exceeds wt%, the melting point of the skin material decreases, and there is a risk of local melting during the brazing heat. Therefore, the Zn content in the skin material is set to 5 wt% or less. Thus, only when the Zn content and thickness of the skin material are set in the region surrounded by the line connecting the points A to J, excellent corrosion resistance can be exhibited after brazing, and thinning can be achieved. It is possible to prevent local dissolution during brazing. Particularly preferably, the point K (1.5 wt%, 30 μ
m), L (2 wt%, 20 μm), M (3 wt%, 15 μ
m), N (3 wt%, 20 μm), O (2.5 wt%, 30
It is preferable to set it in the area surrounded by the line connecting (μm).
【００１６】また、Ａｌ−Ｚｎ系合金皮材中に含まれる
Ｃｕの含有量は、０．０５wt％以下（０wt％を含む）に
規制されなければならない。Ｃｕが０．０５wt％を越え
て含有されると皮材の電位が貴に移行してその犠牲陽極
効果に悪影響を及ぼすからである。特に好ましくは０．
０２wt％以下に規制するのが良い。Ｚｎ、Ｃｕ以外の他
の成分については特に限定されないが、好ましくは皮材
の電位を卑にするの目的でＩｎ：０．０１〜０．２wt
％、Ｓｎ：０．０１〜０．２wt％、Ｍｇ：０．２〜１wt
％の１種又は２種以上を含有せしめるものとしても良
い。Further, the content of Cu contained in the Al-Zn alloy skin material must be regulated to 0.05 wt% or less (including 0 wt%). This is because if Cu is contained in an amount of more than 0.05 wt%, the potential of the skin material shifts to noble and the sacrificial anode effect is adversely affected. Particularly preferably 0.
It is better to regulate it to 02 wt% or less. Other components than Zn and Cu are not particularly limited, but preferably In: 0.01 to 0.2 wt% for the purpose of making the potential of the skin material base.
%, Sn: 0.01 to 0.2 wt%, Mg: 0.2 to 1 wt%
%, One kind or two or more kinds may be contained.
【００１７】上記アルミニウム材は使用に際しろう付に
供される。かかるろう付方法は、真空ろう付以外であれ
ば何でも良い。真空ろう付では皮材中のＺｎが蒸発飛散
してしまうからである。ろう付温度及び時間は、一般的
には５９０〜６１０℃×３〜１５分程度である。このろ
う付加熱時に、Ａｌ−Ｚｎ系合金皮材中のＺｎが芯材中
に拡散し所期する防食効果を発揮する。なお、本発明に
係るアルミニウム材は、これをろう付に供するに際して
は、図４に示すように、芯材（１）のＡｌ−Ｚｎ系合金
皮材（２）と反対側の片面に、Ａｌ−Ｓｉ系合金からな
るろう材層（３）が被着形成されたブレージングシート
に構成しても良い。もとより、ろう材層（３）を存在さ
せることなく芯材（１）とＡｌ−Ｚｎ系合金皮材（２）
とからなるものに構成してこれを他の部材とろう付して
も良い。The aluminum material is used for brazing at the time of use. Any brazing method other than vacuum brazing may be used. This is because Zn in the skin material evaporates and scatters in vacuum brazing. The brazing temperature and time are generally about 590 to 610 ° C. × 3 to 15 minutes. At the time of this brazing heat, Zn in the Al—Zn alloy skin material diffuses into the core material and exhibits the desired anticorrosion effect. When the aluminum material according to the present invention is used for brazing, as shown in FIG. 4, the aluminum material on one side of the core material (1) opposite to the Al—Zn alloy skin material (2) is A brazing sheet having the brazing material layer (3) made of a -Si alloy may be formed on the brazing sheet. Of course, the core material (1) and the Al—Zn alloy skin material (2) without the brazing material layer (3) being present.
It is also possible to form a structure made up of and to braze this with other members.
【００１８】[0018]
【作用】皮材に含有されたＺｎ量と皮材の厚さとが、図
１に示すように点Ａ〜Ｊで囲まれた範囲内の値に設定さ
れているから、ろう付加熱後の表面Ｚｎ濃度が０．８〜
２．０wt％程度となる。そして、皮材のＣｕ含有量が
０．０５ｗｔ％以下に規定されているから皮材電位の貴
への移行が抑制されることとも相俟って孔食が抑制され
る。The amount of Zn contained in the skin material and the thickness of the skin material are set to values within the range surrounded by points A to J as shown in FIG. Zn concentration is 0.8-
It becomes about 2.0 wt%. Further, since the Cu content of the skin material is specified to be 0.05 wt% or less, the pitting corrosion is suppressed in combination with the suppression of the skin material potential shift to noble.
【００１９】[0019]
【実施例】次に、この発明の実施例を示す。EXAMPLES Examples of the present invention will be described below.
【００２０】Ａ３００３Ａｌ合金からなる厚さ２ｍｍの
芯材の片面に、厚さ及びＺｎ含有量を表２のように各種
に変えたＡｌ−Ｚｎ系合金皮材をクラッドした複数のア
ルミニウム材を用意した。A plurality of aluminum materials were prepared by clad on one surface of a core material made of A3003 Al alloy and having a thickness of 2 mm, Al-Zn alloy skin materials having various thicknesses and Zn contents as shown in Table 2. ..
【００２１】そして、上記の各アルミニウム材をろう付
相当の６００℃×５分の条件で加熱した後、表面Ｚｎ濃
度を調べた。その結果を表２に併せて示す。After heating each of the above aluminum materials under the condition of 600 ° C. × 5 minutes which is equivalent to brazing, the surface Zn concentration was examined. The results are also shown in Table 2.
【００２２】[0022]
【表２】 [Table 2]
【００２３】上記表２の結果から明らかなように、Ｚｎ
含有量、皮材の厚さが図１の点Ａ〜Ｊを結ぶ線で囲まれ
た領域内にある本発明実施品（Ｎｏ１〜１０）は、加熱
後の表面Ｚｎ濃度が０．８〜２．０wt％の範囲に収まっ
ており、従って図３のグラフから最大孔食深さも浅く耐
食性に優れていることを予想し得るものであった。As is clear from the results shown in Table 2 above, Zn
The content (Zn) of the skin material is within the region surrounded by the line connecting points A to J in FIG. 1 (Nos. 1 to 10), the surface Zn concentration after heating is 0.8 to 2 It was within the range of 0.0 wt%, and therefore, from the graph of FIG. 3, it was possible to predict that the maximum pitting depth is shallow and the corrosion resistance is excellent.
【００２４】これに対し、皮材の厚さ、Ｚｎ含有量の少
なくとも一方が本発明範囲を逸脱する比較品（Ｎｏ１１
〜１４）は、表面Ｚｎ濃度が０．８wt％未満あるいは
２．０wt％を越えていることがわかる。また、皮材のＺ
ｎ含有量が５wt％を越える比較品Ｎｏ１５は、表面の一
部に局部溶解が認められた。On the other hand, a comparative product (No. 11) in which at least one of the thickness of the skin material and the Zn content deviates from the scope of the present invention.
It can be understood that the surface Zn concentration is less than 0.8 wt% or exceeds 2.0 wt%. In addition, Z of leather material
In Comparative Product No. 15 in which the n content exceeds 5 wt%, local dissolution was observed on a part of the surface.
【００２５】[0025]
【発明の効果】この発明は、上述の次第で、アルミニウ
ムまたはアルミニウム合金からなる芯材の少なくとも片
面に、Ｚｎを含有するＡｌ−Ｚｎ系合金からなる皮材が
被着形成されたろう付用アルミニウム材において、前記
皮材に含有されたＺｎ量と皮材の厚さとが、図１に示す
ように点Ａ〜Ｊで囲まれた範囲内の値に設定されている
から、ろう付加熱後の表面Ｚｎ濃度を０．８〜２．０wt
％程度とすることができる。その結果、皮材のＣｕ含有
量が０．０５ｗｔ％以下に規定されて皮材電位の貴への
移行が抑制されていることとも相俟って、Ｚｎの犠牲陽
極効果を十分かつ有効に発揮させることができ、孔食の
抑制された耐食性に優れたものとなしえ、熱交換器の特
に水等と接するチューブ材のような耐食性が要求される
部材として好適に使用し得る。As described above, according to the present invention, an aluminum material for brazing in which a skin material made of an Al-Zn alloy containing Zn is adhered and formed on at least one surface of a core material made of aluminum or an aluminum alloy. In the above, since the amount of Zn contained in the skin material and the thickness of the skin material are set to values within the range surrounded by points A to J as shown in FIG. Zn concentration 0.8 ~ 2.0wt
It can be about%. As a result, in combination with the fact that the Cu content of the skin material is regulated to 0.05 wt% or less and the transfer of the skin material potential to the noble is suppressed, the sacrificial anode effect of Zn is sufficiently and effectively exhibited. It can be made to have excellent corrosion resistance in which pitting corrosion is suppressed, and it can be suitably used as a member requiring corrosion resistance such as a tube material of a heat exchanger, which is in contact with water.
【図１】この発明に係るＡｌ−Ｚｎ系合金皮材のＺｎ含
有量と厚さとの関係を示すグラフである。FIG. 1 is a graph showing a relationship between Zn content and thickness of an Al—Zn alloy skin material according to the present invention.
【図２】この発明に係るアルミニウム材の一例を示す断
面図である。FIG. 2 is a sectional view showing an example of an aluminum material according to the present invention.
【図３】ろう付加熱相当状態におけるアルミニウム材の
表面Ｚｎ濃度と最大孔食深さとの関係を示すグラブであ
る。FIG. 3 is a grab showing the relationship between the surface Zn concentration and the maximum pitting depth of an aluminum material in a state corresponding to the heat of brazing.
【図４】この発明に係るアルミニウム材の他の例を示す
断面図である。FIG. 4 is a sectional view showing another example of the aluminum material according to the present invention.
１…芯材 ２…Ａｌ−Ｚｎ系合金皮材 1 ... Core material 2 ... Al-Zn alloy skin material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 湯浅 秀子 大阪府堺市海山町６丁224番地 昭和アル ミニウム株式会社内 (72)発明者 大塚 良達 大阪府堺市海山町６丁224番地 昭和アル ミニウム株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideko Yuasa, 224, Kaiyamacho, Sakai City, Osaka Prefecture, Showa Al Minium Co., Ltd. Minium Corporation
Claims (1)
らなる芯材の少なくとも片面に、Ｚｎを含有するＡｌ−
Ｚｎ系合金からなる皮材が被着形成されたろう付用アル
ミニウム材において、 前記皮材に含有されたＺｎ量と皮材の厚さとが、図１に
示すように点Ａ（１wt％、５０μｍ）、点Ｂ（１．２wt
％、４０μｍ）、点Ｃ（１．５wt％、２０μｍ）、点Ｄ
（２wt％、１５μｍ）、点Ｅ（３wt％、１０μｍ）、点
Ｆ（５wt％、５μｍ）、点Ｇ（５wt％、１５μｍ）、点
Ｈ（４wt％、２０μｍ）、点Ｉ（３wt％、３０μｍ）、
点Ｊ（２．５wt％、５０μｍ）で囲まれた範囲内の値に
設定されるとともに、皮材のＣｕ含有量が０．０５ｗｔ
％以下に規定されていることを特徴とする耐食性に優れ
たろう付用アルミニウム材。1. An Al-containing Zn, on at least one surface of a core material made of aluminum or an aluminum alloy.
In a brazing aluminum material on which a skin material made of a Zn-based alloy is adhered and formed, the amount of Zn contained in the skin material and the thickness of the skin material are point A (1 wt%, 50 μm) as shown in FIG. , Point B (1.2 wt
%, 40 μm), point C (1.5 wt%, 20 μm), point D
(2 wt%, 15 μm), point E (3 wt%, 10 μm), point F (5 wt%, 5 μm), point G (5 wt%, 15 μm), point H (4 wt%, 20 μm), point I (3 wt%, 30 μm) ),
It is set to a value within the range surrounded by point J (2.5 wt%, 50 μm), and the Cu content of the skin material is 0.05 wt.
% Aluminum alloy material for brazing, which has excellent corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3227511A JP2572495B2 (en) | 1991-09-06 | 1991-09-06 | Aluminum material for brazing with excellent corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3227511A JP2572495B2 (en) | 1991-09-06 | 1991-09-06 | Aluminum material for brazing with excellent corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0565588A true JPH0565588A (en) | 1993-03-19 |
| JP2572495B2 JP2572495B2 (en) | 1997-01-16 |
Family
ID=16862051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3227511A Expired - Lifetime JP2572495B2 (en) | 1991-09-06 | 1991-09-06 | Aluminum material for brazing with excellent corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2572495B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5743642B2 (en) * | 2011-03-30 | 2015-07-01 | 株式会社神戸製鋼所 | Aluminum alloy brazing sheet |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101640A (en) * | 1980-12-18 | 1982-06-24 | Mitsubishi Alum Co Ltd | Composite brazing sheet for heat exchanger made of al alloy |
| JPH01102297A (en) * | 1987-10-14 | 1989-04-19 | Mitsubishi Alum Co Ltd | Aluminum alloy compound fin material for heat exchanger suitable for brazing and corrosion resistance |
| JPH01195257A (en) * | 1988-01-29 | 1989-08-07 | Furukawa Alum Co Ltd | Aluminum alloy cladded material having excellent corrosion resistance |
| JPH0254735A (en) * | 1988-08-18 | 1990-02-23 | Showa Alum Corp | Aluminum brazing sheet |
| JPH02142672A (en) * | 1988-11-25 | 1990-05-31 | Furukawa Alum Co Ltd | Manufacture of aluminum heat exchanger |
| JPH03124393A (en) * | 1989-10-05 | 1991-05-27 | Furukawa Alum Co Ltd | Brazing sheet for refrigerant passage for heat exchanger made of al |
| JPH03149481A (en) * | 1989-11-07 | 1991-06-26 | Nkk Corp | Old pipe renewal device |
| JPH04232224A (en) * | 1990-12-28 | 1992-08-20 | Honda Motor Co Ltd | Aluminum alloy clad material having superior corrosion resistance |
| JPH0623535A (en) * | 1991-05-24 | 1994-02-01 | Kobe Steel Ltd | Aluminum alloy composite material for brazing |
-
1991
- 1991-09-06 JP JP3227511A patent/JP2572495B2/en not_active Expired - Lifetime
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101640A (en) * | 1980-12-18 | 1982-06-24 | Mitsubishi Alum Co Ltd | Composite brazing sheet for heat exchanger made of al alloy |
| JPH01102297A (en) * | 1987-10-14 | 1989-04-19 | Mitsubishi Alum Co Ltd | Aluminum alloy compound fin material for heat exchanger suitable for brazing and corrosion resistance |
| JPH01195257A (en) * | 1988-01-29 | 1989-08-07 | Furukawa Alum Co Ltd | Aluminum alloy cladded material having excellent corrosion resistance |
| JPH0254735A (en) * | 1988-08-18 | 1990-02-23 | Showa Alum Corp | Aluminum brazing sheet |
| JPH02142672A (en) * | 1988-11-25 | 1990-05-31 | Furukawa Alum Co Ltd | Manufacture of aluminum heat exchanger |
| JPH03124393A (en) * | 1989-10-05 | 1991-05-27 | Furukawa Alum Co Ltd | Brazing sheet for refrigerant passage for heat exchanger made of al |
| JPH03149481A (en) * | 1989-11-07 | 1991-06-26 | Nkk Corp | Old pipe renewal device |
| JPH04232224A (en) * | 1990-12-28 | 1992-08-20 | Honda Motor Co Ltd | Aluminum alloy clad material having superior corrosion resistance |
| JPH0623535A (en) * | 1991-05-24 | 1994-02-01 | Kobe Steel Ltd | Aluminum alloy composite material for brazing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2572495B2 (en) | 1997-01-16 |
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