JPH0273939A - Corrosion-resistant aluminum alloy for heat exchanger - Google Patents
Corrosion-resistant aluminum alloy for heat exchangerInfo
- Publication number
- JPH0273939A JPH0273939A JP22621488A JP22621488A JPH0273939A JP H0273939 A JPH0273939 A JP H0273939A JP 22621488 A JP22621488 A JP 22621488A JP 22621488 A JP22621488 A JP 22621488A JP H0273939 A JPH0273939 A JP H0273939A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- less
- aluminum alloy
- corrosion
- corrosion resistance
- 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
- 230000007797 corrosion Effects 0.000 title claims abstract description 24
- 238000005260 corrosion Methods 0.000 title claims abstract description 24
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 18
- 239000012535 impurity Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 7
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 229910052733 gallium Inorganic materials 0.000 abstract description 3
- 229910052749 magnesium Inorganic materials 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910052748 manganese Inorganic materials 0.000 abstract 2
- 229910052720 vanadium Inorganic materials 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 15
- 229910000765 intermetallic Inorganic materials 0.000 description 11
- 238000001125 extrusion Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- LFVLUOAHQIVABZ-UHFFFAOYSA-N Iodofenphos Chemical compound COP(=S)(OC)OC1=CC(Cl)=C(I)C=C1Cl LFVLUOAHQIVABZ-UHFFFAOYSA-N 0.000 description 1
- 229910019752 Mg2Si Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
Ａ０発明の目的
（１）産業上の利用分野
本発明は熱交換器用耐食性アルミニラＪ、合金に関する
。DETAILED DESCRIPTION OF THE INVENTION A0 OBJECTS OF THE INVENTION (1) Industrial Field of Application The present invention relates to a corrosion-resistant aluminum alloy J for heat exchangers.
（２）従来の技術
従来、熱交換器、例えば自動車用ラジェータの水路形成
用チューブは、主として外部からの腐食を防止するため
アルミニウム合金のクランド材より構成されている。(2) Prior Art Conventionally, heat exchangers, such as tubes for forming water channels in automobile radiators, are mainly made of aluminum alloy crund material to prevent corrosion from the outside.
（３）発明が解決しようとする課題
しかしながらデユープをクラツド材より構成すると、チ
ューブの製造が面倒である上、材料費が嵩み、製造コス
トが高いという問題がある。(3) Problems to be Solved by the Invention However, if the duplex is made of a clad material, there are problems in that it is troublesome to manufacture the tube, and the cost of materials and manufacturing costs are high.
本発明は前記に鑑み、優れた耐食性および強度を有し、
熱交換器用部材を単層構造に構成し得る前記アルミニウ
ム合金を提供することを目的とずＢ８発明の構成
（１）課題を解決するだめの手段
本発明に係る熱交換器用耐食性アルミニウム合金は、ｌ
ｖｉｇｏ、５重量％以」二、３．７重量％以下、Ｓｉ０
．２５重足％以上、１．８５重量％以下、Ｆｅ０．０５
重量％以上、０，１５重量％以下、Ｍｎ０４１５重量％
以上、１．８２２重丸以下、Ｃｕｂ。In view of the above, the present invention has excellent corrosion resistance and strength,
B8 Structure of the Invention (1) Means for Solving the Problems The corrosion-resistant aluminum alloy for heat exchangers according to the present invention does not aim to provide the aluminum alloy that can form a heat exchanger member into a single layer structure.
vigo, 5% by weight or more, 2, 3.7% by weight or less, Si0
．． 25% by weight or more, 1.85% by weight or less, Fe0.05
% by weight or more, 0.15% by weight or less, Mn0415% by weight
Above, below 1.822 double circles, Cub.
０３３重丸以下、Ｚｎ０．０３重足％以上、■０．０５
重量％以下、Ｇａ０．０３３重丸以下および残部が０．
０２重量％以下の不６Ｊ避不純物を含むＡｎよりなるこ
とを第１の特徴とする。033 heavy circles or less, Zn0.03 heavy marks or more, ■0.05
% by weight or less, Ga 0.033 or less, and the balance is 0.
The first feature is that it is made of An containing 0.02% by weight or less of impurities.
また本発明に係る熱交換器用耐食性アルミニウム合金は
、Ｍｇ０．５重量％以上、３．７重量％以下、Ｓｉ０．
２５重量％以上、１．８５重量％以下、Ｆｃ０．０５重
量％以下、Ｃｕ０．０３重量％以下、Ｚｎ０．０３重量
％以下、Ｇａ０．０３重量％以下および残部が０．０２
重量％以下および残部が０．０２重量％以下の不可避不
純物を含むＡｌよりなることを第２の特徴とする。Further, the corrosion-resistant aluminum alloy for heat exchangers according to the present invention has Mg of 0.5% by weight or more and 3.7% by weight or less, Si of 0.5% by weight or more and 3.7% by weight or less.
25% by weight or more, 1.85% by weight or less, Fc 0.05% by weight or less, Cu 0.03% by weight or less, Zn 0.03% by weight or less, Ga 0.03% by weight or less, and the balance is 0.02
The second feature is that it is made of Al containing unavoidable impurities of not more than 0.02% by weight and the balance being not more than 0.02% by weight.
（２）作 用
アルミニウム合金においては、７トリツクスと析出相間
の電位差が２０ｍＶを上回ると腐食が加速される傾向に
ある。(2) Effect In aluminum alloys, corrosion tends to be accelerated when the potential difference between the 7 trix and the precipitated phase exceeds 20 mV.
第１の特徴によれば、各化学成分の添加量が略固溶限内
に収められると共に７１−リックスと析出相間の電位差
が２０ｍＶ以下に抑えられ、これにより耐食性の優れた
熱交換器用アルミニウム合金が提供される。また金属間
化合物ＭｇｚＳ＋を析出してＧ、 Ｐヅーンによる強
度向上効果が得られる。According to the first feature, the amount of each chemical component added is approximately within the solid solubility limit, and the potential difference between the 71-Rix and the precipitated phase is suppressed to 20 mV or less, which makes the aluminum alloy for heat exchangers excellent in corrosion resistance. is provided. In addition, the intermetallic compound MgzS+ is precipitated and the strength improvement effect of G and P dunes can be obtained.
第２の特徴によれば、特に、Ｆｅの添加量の上限値を限
定することによって、Ｍｎの添加無しに電位の高い金属
間化合物の析出が抑制される。According to the second feature, especially by limiting the upper limit of the amount of Fe added, precipitation of high-potential intermetallic compounds is suppressed without adding Mn.
（３）実施例
第１．第２図は熱交換器としての自動車用ラジェータ１
を示し、そのラジェータ１においては、車体の前後方向
に並ぶ２本−組の偏平な水路形成用チューブ２が車幅方
向に複数組並列され、相隣る組のチューブ２間は波形フ
ィン３を介し゛ζ連結される。そのフィン３はチューブ
２外周面にろう接されている。(3) Example 1. Figure 2 shows an automobile radiator 1 as a heat exchanger.
In the radiator 1, a plurality of two sets of flat waterway forming tubes 2 are arranged in parallel in the vehicle width direction, and corrugated fins 3 are provided between adjacent sets of tubes 2. are connected via ζ. The fins 3 are soldered to the outer peripheral surface of the tube 2.
各チューブ２はアルミニウム合金に押出し加工を施すこ
とによって単層構造に構成され、その合金組成の一例を
述べれば表１の通りである。Each tube 2 is formed into a single layer structure by extruding an aluminum alloy, and an example of the alloy composition is shown in Table 1.
表 Ｉ
残部であるＡＥ中に含まれる不可避不純物は０゜０１重
量％以下である。Table I The unavoidable impurities contained in the remaining AE are 0.01% by weight or less.
前記化学成分において、Ｍｇはマトリックスの強度を向
」ニさせると共に酸化皮膜の強化に寄与する。た＼し、
０．５重量％を下回ると、マトリックス強化能が無く、
一方、３．７重量％を上回ると、フィン３とのろう接性
が低下する。Among the chemical components, Mg improves the strength of the matrix and contributes to strengthening the oxide film. Ta\shi,
If it is less than 0.5% by weight, there is no matrix reinforcement ability,
On the other hand, if it exceeds 3.7% by weight, the solderability with the fins 3 will decrease.
Ｓｉは、Ｍｇの存在下において金属間化合物Ｍｇｚｓ！
を析出し、Ｇ、Ｐゾーンによる強度向上効果を発揮し、
またＦｅの存在下において責な金属間化合物ＦｅＡｆｆ
ｉ３を優先的に析出させる。ただし、０．２５重重量を
下回ると前記効果が得られず、一方、１．８５重量％を
上回ると過飽和となり、押出し加工性、靭性が低下し、
また金属間化合物ＦｅＡＮ３が過剰となって脆化する。Si forms an intermetallic compound Mgzs! in the presence of Mg.
is precipitated, and the G and P zones exhibit strength improvement effects.
In addition, in the presence of Fe, the intermetallic compound FeAff
i3 is preferentially deposited. However, if it is less than 0.25% by weight, the above effect cannot be obtained, while if it exceeds 1.85% by weight, it will become supersaturated, and extrusion processability and toughness will decrease.
Moreover, the intermetallic compound FeAN3 becomes excessive and becomes brittle.
Ｆｅは押出し加工性およびろう＋４に対する濡れ性を向
上させる効果を有する。この効果はＭｎとの共存によっ
て一層顕著となる。た−し、０．０５重量％を下回ると
、前記効果が低下する傾向にあり、一方、０．１５重量
％を一ト回ると、粗大金属間化合物の析出により耐食性
、押出し加工性およびろう接性が低下する。Fe has the effect of improving extrusion processability and wettability to wax +4. This effect becomes even more remarkable when it coexists with Mn. However, if it is less than 0.05% by weight, the above-mentioned effects tend to decrease, while if it exceeds 0.15% by weight, corrosion resistance, extrusion workability, and brazing properties will deteriorate due to the precipitation of coarse intermetallic compounds. Sexuality decreases.
Ｍｎは高温強度を向」ニさせると共にＦｅが固溶限を超
えて添加、したがって０．０５重重量を上回って添加さ
れているときに電位の高いＦｅＡｊ２６等の金属間化合
物の析出を抑制して耐食性を向上させる効果を有する。Mn improves high-temperature strength and suppresses the precipitation of intermetallic compounds such as FeAj26, which have a high potential when Fe is added in excess of the solid solubility limit, and therefore in an amount exceeding 0.05 wt. It has the effect of improving corrosion resistance.
た！し、０．１５重量％を下回ると、前記効果が得られ
ず、一方、１．８２重量％を十回ると、粗大金属間化合
物の析出により押出し加工性および耐食性が低下する。Ta! However, if it is less than 0.15% by weight, the above effects cannot be obtained, while if it exceeds 1.82% by weight, extrusion workability and corrosion resistance will deteriorate due to precipitation of coarse intermetallic compounds.
Ｃｕは微量添加にて機械的性質および押出し加工性を改
善する効果を有する。た−し、０．０３重量％を上回る
と耐食性が低下する。Cu has the effect of improving mechanical properties and extrusion processability when added in a small amount. However, if it exceeds 0.03% by weight, corrosion resistance will decrease.
Ｚｎは強度向上に寄与する。た＼し、０．０３重量％を
上回ると、マトリックスの電位を卑にすると共に酸化皮
膜を弱化する。Zn contributes to improving strength. However, if it exceeds 0.03% by weight, the potential of the matrix becomes base and the oxide film is weakened.
■およびＧａは耐熱性を向上させる効果を有する。たヌ
゛し、■が０．０５重量％を、またＧａが０゜０３重量
％をそれぞれ」−回ると、押出し加工性が低下する。(2) and Ga have the effect of improving heat resistance. However, when the amount of () exceeds 0.05% by weight and the amount of Ga exceeds 0.03% by weight, the extrusion processability decreases.
前記アルミニウム合金には、必要に応じてＴｉおよびＣ
ｒの少なくとも一方が添加される。この場合、Ｔｉは０
．０１重量％以−Ｆ、１．０重量％以下、またＣｒは０
．０１重量％以上、０．８重量％以下にそれぞれ設定さ
れる。ＴｉおよびＣｒは結晶粒を微細化して強度を向上
し、また耐粒界腐食性を良好にする効果を有する。た−
し、ＴＩおよびＣ「が共に０．０１重量％を下回ると、
前記効果を得ることができず、一方、Ｔｉが１．０重量
％を、またＣｒが０．８重量％をそれぞれ上回ると、ｉ
ｎｎ金金属間化合物析出して耐食性および押出し加工性
が低下する。The aluminum alloy may optionally contain Ti and C.
At least one of r is added. In this case, Ti is 0
．． 01% by weight or more - F, 1.0% by weight or less, and Cr is 0
．． The content is set at 0.01% by weight or more and 0.8% by weight or less, respectively. Ti and Cr have the effect of making crystal grains finer, improving strength, and improving intergranular corrosion resistance. Ta-
However, when both TI and C are less than 0.01% by weight,
The above effect cannot be obtained, and on the other hand, if Ti exceeds 1.0% by weight and Cr exceeds 0.8% by weight, i
nn Gold intermetallic compounds precipitate, resulting in decreased corrosion resistance and extrusion processability.
アルミニウム合金においては、７トリツクスと析出相間
の電位差が２０ｍＶを上回ると腐食が加速される傾向に
あるが、前記のように各化学成分の添加量を設定すると
、その添加量ば略固溶限内に収められると共にマトリッ
クスと析出相間の電位差が２０ｍＶ以下に抑えられるの
で、チューブ２を中層構造に構成しても、その耐食性を
向上させることができる。また金属間化合物Ｍｇ２Ｓｉ
の析出により、チューブ２の強度を向上させることがで
きる。In aluminum alloys, corrosion tends to be accelerated when the potential difference between the 7trix and the precipitated phase exceeds 20 mV, but when the amount of each chemical component added is set as described above, the amount added is approximately within the solid solubility limit. Since the potential difference between the matrix and the precipitated phase is suppressed to 20 mV or less, the corrosion resistance of the tube 2 can be improved even if the tube 2 has an intermediate layer structure. Also, the intermetallic compound Mg2Si
By precipitation of , the strength of the tube 2 can be improved.
表■はチューブ２の合金組成の他側を示す。Table ■ shows the other side of the alloy composition of tube 2.
表 ■
残部であるＡｐ、中に含まれる不可避不純物は０６０１
重量％以下である。Table ■ The remaining Ap, the inevitable impurities contained in it are 0601
% by weight or less.
この合金において、Ｍｇ、Ｓ ｉ、Ｃｕ、Ｚｎ、■およ
びＧａの添加理由およびそれら添加量の−Ｆ、下限値は
前記表１の場合と同様である。In this alloy, the reasons for addition of Mg, Si, Cu, Zn, (2) and Ga, as well as their addition amounts -F and lower limit values, are the same as in Table 1 above.
この合金の特徴は、Ｆｅ添加量の上限値が０゜０５重量
％以下、本例では０．０３重量％に設定されていること
にある。これによりＦｅの添加量が固溶限内に収められ
るので、Ｍｎの添加無しに金属間化合物ＦｅＡｌ６等の
析出が抑制され、耐食性が良好になる。A feature of this alloy is that the upper limit of the amount of Fe added is set to 0.05% by weight or less, in this example 0.03% by weight. As a result, the amount of Fe added is kept within the solid solubility limit, so precipitation of intermetallic compounds such as FeAl6 is suppressed without addition of Mn, and corrosion resistance is improved.
この合金においても、必要に応じ前記同様にＴｉおよび
Ｃｒの少なくとも一方が前記添加量にて用いられる。In this alloy as well, at least one of Ti and Cr is used in the above-mentioned addition amount as described above, if necessary.
前記アルミニウム合金において、Ｚｎ添加量を０．０３
重量％を上回るが、１．０重量％以下に設定し、この合
金よりフィン３を構成することにより、フィン３の電位
をチューブ２のそれよりも卑にしてフィン３に犠牲陽極
作用を持たせ、これによりフィン３をチューブ２よりも
腐食し易くしてチューブ２の防食性を向上させることが
できる。In the aluminum alloy, the amount of Zn added is 0.03
By making the fin 3 from this alloy, the potential of the fin 3 is made more base than that of the tube 2, and the fin 3 has a sacrificial anode effect. This makes it possible for the fins 3 to corrode more easily than the tube 2, thereby improving the corrosion resistance of the tube 2.
これは、ＳｎおよびＩｎの少なくとも一方を、Ｚｎと共
に、またはＺｎ無添加状態にて添加しても達成される。This can be achieved even if at least one of Sn and In is added together with Zn or without Zn.
この場合、Ｓｎは０．０２重重量以上、１．０重量％以
下に、またＩｎは０．００５重量％以上、０．１重量％
以下にそれぞれ設定される。In this case, Sn is 0.02% by weight or more and 1.0% by weight or less, and In is 0.005% by weight or more and 0.1% by weight.
Each is set below.
なお、本発明はラジェータ以外の熱交換器にも当然に適
用される。Note that the present invention is naturally applicable to heat exchangers other than radiators.
Ｃ８発明の効果
第（１）項記載の発明によれば、優れた耐食性および強
度を有し、熱交換器用部材を単層構造に構成し得るアル
ミニウム合金を提供することができる。Effects of the C8 Invention According to the invention described in item (1), it is possible to provide an aluminum alloy that has excellent corrosion resistance and strength and can be used to form a heat exchanger member into a single layer structure.
第（２）項記載の発明によれば、Ｍｎの添加無しに前記
同様に優れた耐食性および強度を有するアルミニウム合
金を提供することができる。According to the invention described in item (2), an aluminum alloy having excellent corrosion resistance and strength as described above can be provided without adding Mn.
図面は自動車用ラジェータを示し、第１図は要部を破断
した斜視図、第２図は要部拡大斜視図である。The drawings show a radiator for an automobile, with FIG. 1 being a cutaway perspective view of the main part, and FIG. 2 being an enlarged perspective view of the main part.
Claims (2)
０．２５重量％以上、１．８５重量％以下、Ｆｅ０．０
５重量％以上、０．１５重量％以下、Ｍｎ０．１５重量
％以上、１．８２重量％以下、Ｃｕ０．０３重量％以下
、Ｚｎ０．０３重量％以下、Ｖ０．０５重量％以下、Ｇ
ａ０．０３重量％以下および残部が０．０２重量％以下
の不可避不純物を含むＡｌよりなることを特徴とする熱
交換器用耐食性アルミニウム合金。(1) Mg 0.5% by weight or more, 3.7% by weight or less, Si
0.25% by weight or more, 1.85% by weight or less, Fe0.0
5% by weight or more, 0.15% by weight or less, Mn 0.15% by weight or more, 1.82% by weight or less, Cu 0.03% by weight or less, Zn 0.03% by weight or less, V 0.05% by weight or less, G
A corrosion-resistant aluminum alloy for heat exchangers, characterized in that it is made of Al containing unavoidable impurities of 0.03% by weight or less and the balance being 0.02% by weight or less.
０．２５重量％以上、１．８５重量％以下、Ｆｅ０．０
５重量％以下、Ｃｕ０．０３重量％以下、Ｚｎ０．０３
重量％以下、Ｖ０．０５重量％以下、Ｇａ０．０３重量
％以下および残部が０．０２重量％以下の不可避不純物
を含むＡｌよりなることを特徴とする熱交換器用耐食性
アルミニウム合金。(2) Mg 0.5% by weight or more, 3.7% by weight or less, Si
0.25% by weight or more, 1.85% by weight or less, Fe0.0
5% by weight or less, Cu0.03% by weight or less, Zn0.03
A corrosion-resistant aluminum alloy for a heat exchanger, characterized in that it is made of Al containing unavoidable impurities of 0.05% by weight or less of V, 0.03% by weight or less of Ga, and the balance 0.02% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22621488A JPH0273939A (en) | 1988-09-09 | 1988-09-09 | Corrosion-resistant aluminum alloy for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22621488A JPH0273939A (en) | 1988-09-09 | 1988-09-09 | Corrosion-resistant aluminum alloy for heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0273939A true JPH0273939A (en) | 1990-03-13 |
Family
ID=16841684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22621488A Pending JPH0273939A (en) | 1988-09-09 | 1988-09-09 | Corrosion-resistant aluminum alloy for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0273939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04314840A (en) * | 1991-04-12 | 1992-11-06 | Furukawa Alum Co Ltd | Aluminum alloy sheet excellent in formability and corrosion resistance |
| CN112831700A (en) * | 2020-12-31 | 2021-05-25 | 安徽鑫铂铝业股份有限公司 | High-strength corrosion-resistant aluminum alloy for contact net and preparation method thereof |
-
1988
- 1988-09-09 JP JP22621488A patent/JPH0273939A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04314840A (en) * | 1991-04-12 | 1992-11-06 | Furukawa Alum Co Ltd | Aluminum alloy sheet excellent in formability and corrosion resistance |
| CN112831700A (en) * | 2020-12-31 | 2021-05-25 | 安徽鑫铂铝业股份有限公司 | High-strength corrosion-resistant aluminum alloy for contact net and preparation method thereof |
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