1304445 玖、發明說明： (一） 發明所屬之技術領域 本發明係關於鋁管及其製造方法，更詳細的，例如關於 具有作爲使用氟氯烷（Freon)系冷媒的車輛空氣調節器或蒸 發器，使用C02冷媒的車輛空氣調節器的氣冷器或蒸發器 、汽車用冷油器、汽車用水箱等所使用熱交換器之入口管 及出口管、或具壓縮機、凝結器及蒸發器且由使用氟氯烷 系冷媒的冷凍循環所成車輛空氣調節器的壓縮機、凝結器 及蒸發器間配管使用、或具壓縮機、氣冷器、中間熱交換 鲁 器、膨脹閥及蒸發器且由使用C Ο 2冷媒的冷凍循環所成車 輛空氣調節器的壓縮機、氣冷器、中間熱交換器、膨脹閥 及蒸發器間之配管使用的鋁管及其製造方法。 於本說明書及申請專利範圍，所稱呼「鋁」的用語係純 鋁之外包含鋁合金者。又，當然以元素記號表現的金屬， 並不包含其合金。 (二） 先前技術 0 技術背景 例如作爲由使用氟氯烷系冷媒的冷凍循環所成車輛空氣 調節器用之凝結器具有：一對鋁製集管箱，互相隔以間隔 配置成平行；鋁製扁平狀熱交換管，將兩端以並排狀分別 、 連接在兩集管箱；鋁製波形散熱片，配置於相鄰熱交換管 間的通風間隙，同時硬焊在兩熱交換管；鋁製入口管，連 接於一側的集管箱；及鋁製出口管，連接在另一側之集管 -5- 1304445 箱者爲眾所周知。 先前，作爲該凝結器的入口管及出口管，係JIS AL100 、或JIS A3003、或含有Μη 1.0〜1。5質量％，同時含有Mg 0.2質量％以上且0.6質量％以下，由剩餘部分A1及無法避 免不純物所成合金等形成（參照日本國特公平3-2245 9號公 報）。 可是於上述凝結器，爲了提高耐蝕性的目的，先前在表 面作鉻酸鹽液處理，但其處理作業麻煩。又Cr6 +爲有害物 質其廢液處理麻煩。因而，有製造凝結器全體之作業麻煩 的問題。而且，於歐洲，不久將禁止使用Cr6+。 於是對於上述凝結器之冷媒流通管，對代替使用有害 Cr6 +的鉻酸鹽液處理之耐孔蝕性處理，或具有耐孔蝕性者 有作種種的檢討。 然而對於出入口管，在現狀並未找出可簡單且價廉的製 造，而且具有充分的耐孔蝕性者。當然，於記載在上述公 報的熱交換器用出入口管，未施予鉻酸鹽液處理時並不能 期待耐孔蝕性。 本發明之目的係在於提供一種解決上述問題，可簡單且 價廉的製造，而且具有充分的耐孔蝕性之鋁管及其製造方 法。 (三）發明內容 發明之啓示 依本發明的鋁管，由包含Μη 0.9〜1.5質量％，剩餘部分 1304445 A1及無法避免不純物所成合金形成，自外周面之最表面至 深度60μιη以上的表層部予以擴散Zn，同時此表層部之zn f辰度爲0.2〜0.70質量％者。 於依本發明的鋁管，Μ η係發揮了提高耐孔蝕性，同時提 高熱交換器用出入口管強度的效果，但其含有量爲〇· 9質 ~ 量％以下時不能獲得上述效果，超過1.5質量％時提高強度 之效果會飽和，另一方面增大熱加工時的變形阻力，成形 熱交換器用出入口管之際的加工性，例如降低推出加工性 。因而出入口管的Μη含有量係應作爲0.9〜1.5質量％，但 g 以1.0〜1.2質量％爲理想。 又，在本發明的鋁管，Ζη自外周面之最表面至深度60μιη 以上之表層部所擴散，使此表層部之電位爲低，對除了表 層部的部分予以犧牲腐蝕表層部，防止在鋁管產生孔蝕者 ，但上述表層部之Ζ η濃度爲0 · 2 0之質量％以下時不能獲得 上述效果。相反地，超過0 · 7 0質量％時對鋁管本身之耐蝕 性雖無問題，但欲作成爲超過0·70質量％者，例如將製造 鋁管以如後述，於熱交換器同時實行熱交換管與散熱片的 φ 硬焊時，有必要熔射多量的Ζη在熱交換管表面，不能確保 於所製造熱交換器的熱交換管，或熱交換管與散熱片的硬 焊部耐蝕性。因而上述表層部之Ζ η濃度應作爲〇 · 2 0〜0.7 0 質量％。又自鋁管外周面之最表面的Ζη擴散距離係最大爲 _ 1 Ο Ο μ m程度。 依本發明之鋁管，並不施予鉻酸鹽液處理能防止產生孔 蝕。而且含Μη 0.9〜1.5質量％，以剩餘部分A1及無法避 -7- 1304445 免不純物所成合金形成，自外周面之最表面至深度60μιη 以上之表面層擴散的Ζη，同時此表面層之Ζπ濃度僅成爲 〇·2〇〜0.70質量％而已，所以能簡單且價廉的製造。 依本發明的鋁管，作爲無法避免不純物的Cu含有量係 〇·〇1質量％以下爲理想。作爲無法避免不純物的Cu由混入 微量亦有降低鋁管耐孔蝕性之慮。 依本發明的鋁管，作爲無法避免不純物的Fe含有量係 0.25質量％以下爲理想。作爲無法避免不純物之Fe雖無Cu 程度強的影響者，但有降低鋁管耐孔蝕性之慮者。 φ 於依本發明的鋁管，作爲無法避免不純物的S i含有量係 0.25質量％以下爲理想。作爲無法避免不純物的Si與Fe 同樣，有降低鋁管耐孔蝕性之慮。 依本發明的鋁管，作爲無法避免不純物的M g含有量係 0 · 3 0質量％以下爲理想。作爲無法避免不純物之M g係硬 焊性及加工性，例如有降低推出性使加工成本上升之慮。 依本發明的錕管之製造方法，其特徵爲含μ η 0 · 9〜1 · 5 質量％，由剩餘部分Α1及無法避免不純物所成合金形成管 書 素材，及表面形成2.0〜16.〇g/m2之ζη熔射層且Ζη熔射層 之合計Ζη量爲75〜600g的鋁材，放入惰性氣體環境之爐 中，在580〜610 °C加熱3〜15分鐘者。 依本發明銘管之製造方法，形成在鋁材表面的Zn熔射層 ’在後製程加熱之際蒸發擴散於管素材外周面之表層部。 而且限定鋁材表面之Ζη熔射層爲2 〇〜16.〇g/m2且合計Zn 量75〜600g，在該下限値以下時，不能使所製造之鋁管之 ‘8- 1304445 該表層部的Zn濃度爲0.20質量％以上，超過上限値時於該 表層部的Zn濃度會超過0.70質量％者。 又，依本發明鋁管之製造方法，加熱溫度及加熱時間爲 下限値以下時，自Zn熔射層之Zn蒸發及所蒸發Zn對管 素材表層部的擴散並不充分，不能製造鋁管之該表層部的 Zn濃度爲0.20質量％以上，超過上限値則使製造鋁管，例 如如後述，同時實行於熱交換器的熱交換管與散熱片硬焊 時，招來散熱片等鋁材之母材融解，或熔射在熱交換管表 面的Zn過度的擴散於熱交換管內，有引起腐蝕漏的可能性 。又，加熱溫度以5 8 5〜6 0 5 °C爲理想。 依本發明的鋁管之製造方法，可比較簡單的且廣價的製 造上所述鋁管。 依本發明鋁管之製造方法，於形成管材合金的Μη 含有量係1.0〜1.2質量％爲理想。又於形成管材合金作爲 無法避免不純物的Cu含有量係0 · 0 1質量％以下爲理想。於 形成管材合金作爲無法避免不純物的Fe含有量係0.25質量 %以下爲理想。於形成管材合金作爲無法避免不純物的Si 含有量係0.25質量％以下爲理想。再者，於形成管材合金 作爲無法避免不純物的Mg含有量係〇.30質量％ 以下爲理想。 依本發明鋁管之製造方法，鋁材爲於熱交換器的複數熱 交換管，各熱交換管之表面形成2.0〜16.Og/m2之Zn熔射 層，且於所有熱交換管表面的Zn熔射層之合計Zn量爲75 〜7 〇〇g，爐爲硬焊熱交換管與鋁製集管箱及鋁製散熱片的 冬 1304445 爐，於硬焊惰性氣體環境的熱交換管、集管箱及散熱片之 際，有加熱管材的情況。在此狀況，同時與製造熱交換器 — 可製造鋁管，故不必要特別的設備等，製造成本變低廉。 、 (四）實施方式 爲了實施發明的較佳形態 以下，參照圖面說明本發明之實施形態。 於第1圖，使用氟氯烷系冷媒用在車輛空氣調節器的凝 結器（1)具備有··一對鋁製集管箱（2)(3)，互相隔以間隔配 置成平行；鋁擠出形材製扁平狀冷媒流通管（3 )(熱交換管）φ ，並排狀連接兩端在各個兩集管箱（2) (3);鋁硬焊製波形散 熱片（5) ’配置於相鄰冷媒流通管（4)間之通風間隙，同時硬 焊於兩冷媒流通管（4);鋁擠出形材製入口管（6)，熔接在第 1集管箱（2)之周壁上端部；鋁擠出形材製出口管（7)，熔接 在第2集管箱（3)之周壁下端部；第1隔間板（8)，設於較第 1集管箱（2)中程的上方位置內部；及第2隔間板（9)，設於 較第2集管箱（3)中程的下方位置內部。尙作爲冷媒流通管 (4)亦可以使用由熔接管所成者。 φ 入口管（6)與第1隔間板（8)間的冷媒流通管（4)支數，第1 隔間板（8)與第2隔間板（9)間的冷媒流通管（4)支數，第2 隔間板（9)與出口管（7)間的冷媒流通管（4)支數，分別自上 依順序減少來構成通路群，從入口管（6)流入的氣相之冷媒 . ’至由出.口管（7)成液相流出，作成爲以各通路群單位在凝 結器內作蛇行狀流。 入口管（6)及出口管（7)，由分別含Μη 0.9〜1.5質量％， -10- 13〇4445 剩餘部分A1及無法避免不純物所成合金形成，自外周面之 最表面至深度60μΙΏ以上的表層部擴散的Zn，同時作成此 表層部之Zn濃度爲0.20〜0.70質量％。 形成入口管（6)及出口管（7)的合金中Μη含有量係1.〇〜 1 ·2質量％爲理想。又上述合金中無法避免不純物之中Cu 5有量爲0.01質量％以下，同樣Fe含有量爲0.25質量％ 以下，同樣Si含有量爲〇.25質量％以下，同樣g含有量爲 Q · 3 〇質量％以下。 入口管（6)及出口管（7)例如以如次製造。 首先’使用如上所述的合金擠出成形入口管材及出口管 素材。又準備形成第1圖所示凝結器（1)的1對鋁製集管箱 (2)(3)、複數鋁擠出形材製冷媒流通管（4)及複數鋁硬焊片 製波形散熱片（5)。在兩集管箱（2)(3)分別予以形成複數之 管插入孔。又各冷媒流通管（4)之表面，形成2.0〜16.Og/m2 ’理想爲2.0〜8.0g/m2的Zn熔射層，且作成所有冷媒流通 管（4)表面的Zn熔射層之合計Zn量爲75〜600g，理想爲 75〜300g。 而且，隔以間隔配置1對集管箱（2)(3)，同時互相配置複 數冷媒流通管（4)與複數波形散熱片（5)，將冷媒流通管（4) 兩端部插入兩集管箱（2) (3)之管插入孔形成爲組合體。接著 對該等組合體塗布氟化物系助熔劑（氟化鉀及氟化鋁的共 晶組成近旁者），放入作成惰性氣體環境的爐中，同時放入 所有之入口管材及出口管材於上述爐中。其後，以580〜 6 1〇°C加熱3〜15分鐘。如此利用設在集管箱（2)(3)的硬焊 -11- 1304445 材層硬焊冷媒流通管（4)及集管箱（2)(3)，同時利用波形散 熱片（5)的硬焊材一起硬焊冷媒流通管（4)及集管箱（2) 製 造凝結器（1)，同時製造入口管（6)及出口管（7)。 凝結器（1 )，係壓縮機及蒸發器一起構成使用氟氯院系冷 媒的冷凍循環，作爲車輛空氣調節器的車輛，例如搭載於 汽車。 於上所述實施形態，依本發明的鋁管係由使用氟氯院系 冷媒的冷凍循環所成，雖作爲車輛空氣調節器的凝結器入 口管及出口管，但亦有使用作爲該車輛空氣調節器之蒸發 器入口管及出口管。再者，依本發明的鋁管，亦有使用於 作汽車用油冷器、汽車用水箱等用熱交換器的出入口管。 又依本發明的鋁管亦有使用於作爲具壓縮機、凝結器及 蒸發器且由使用氟氯烷系冷媒的冷凍循環所成車輛空氣調 節器之壓縮機、凝結器及蒸發器間的配管，或具壓縮機、 氣冷器、中間熱交換器、膨脹閥及蒸發器且由使用c 0 2 冷媒的冷凍循環所成車輛空氣調節器的壓縮機、氣冷器、 中間熱交換器、膨脹閥及蒸發器間的配管。 再者，依本發明的鋁管亦有使用於作爲，具壓縮機、氣 冷器、中間熱交換器、膨脹閥及蒸發器，且由使用co2冷 媒的冷凍循環所成車輛空氣調節器之氣冷器或蒸發器間的 入口管及出口管。 實施例1 使用由含Μη 1.08質量％、Cu 0.01質量％以下、Si 0.〇6 質量 ％、Fe 0.12 質量 ％、Mg 0.01 質量 ％、Cr 0.01 質量 ％、 -12- 1304445TECHNICAL FIELD The present invention relates to an aluminum tube and a method of manufacturing the same, and more particularly, for example, to a vehicle air conditioner or evaporator having a refrigerant as a Freon-based refrigerant. , an air inlet or an evaporator of a vehicle air conditioner using a C02 refrigerant, an inlet pipe and an outlet pipe of a heat exchanger used in an automobile water tank, an automobile water tank, or the like, or a compressor, a condenser, and an evaporator Used in a refrigeration cycle using a chlorofluorocarbon refrigerant to form a compressor, a condenser, and an evaporator pipe of a vehicle air conditioner, or a compressor, an air cooler, an intermediate heat exchanger, an expansion valve, and an evaporator. An aluminum tube used for piping between a compressor, an air cooler, an intermediate heat exchanger, an expansion valve, and an evaporator of a vehicle air conditioner by a refrigeration cycle using a C Ο 2 refrigerant, and a method of manufacturing the same. For the purposes of this specification and the scope of application, the term "aluminum" is used to include aluminum alloys other than pure aluminum. Moreover, of course, the metal represented by the element mark does not contain the alloy. (2) Prior Art 0 Technical Background For example, a condenser for a vehicle air conditioner formed by a refrigerating cycle using a chlorofluorocarbon-based refrigerant has a pair of aluminum headers arranged in parallel at intervals; aluminum flat Heat exchange tube, the two ends are connected side by side and connected to two header boxes; aluminum wave fins are arranged in the ventilation gap between adjacent heat exchange tubes, and are brazed in two heat exchange tubes; aluminum inlet Tubes, connected to the header of one side; and aluminum outlet tubes, connected to the other side of the header - 5 - 1304445 boxes are well known. In the past, the inlet pipe and the outlet pipe of the condenser are JIS AL100 or JIS A3003, or contain Μη 1.0 to 1.5% by mass, and contain 0.2% by mass or more and 0.6% by mass or less of Mg, and the remaining portion A1 and It is impossible to avoid the formation of alloys such as impurities (refer to Japanese National Patent No. 3-2245 9). However, in the above-mentioned condenser, in order to improve the corrosion resistance, the surface was previously treated with a chromate solution, but the handling operation was troublesome. Moreover, Cr6 + is a harmful substance and its waste liquid is troublesome to handle. Therefore, there is a problem that the work of manufacturing the entire condenser is troublesome. Moreover, in Europe, the use of Cr6+ will soon be banned. Therefore, the refrigerant flow pipe of the above-mentioned condenser has various kinds of corrosion resistance treatments for the treatment of chromate solution instead of using harmful Cr6 + or a variety of pitting resistance. However, for the inlet and outlet pipes, it has not been found in the present state that it is simple and inexpensive to manufacture, and has sufficient pitting resistance. Of course, in the inlet and outlet pipes for heat exchangers described in the above publication, pitting corrosion resistance cannot be expected when the chromate liquid treatment is not applied. SUMMARY OF THE INVENTION An object of the present invention is to provide an aluminum tube which can solve the above problems and which can be manufactured simply and inexpensively, and which has sufficient pitting resistance and a method for producing the same. (III) SUMMARY OF THE INVENTION The aluminum tube according to the present invention is formed of an alloy containing Μη 0.9 to 1.5% by mass, the remaining portion 1304445 A1 and an alloy which cannot be prevented from being impure, and the surface layer from the outermost surface of the outer peripheral surface to a depth of 60 μm or more The Zn is diffused, and the zn f of the surface layer portion is 0.2 to 0.70% by mass. In the aluminum tube according to the present invention, the Μ η system has an effect of improving the pitting resistance and improving the strength of the inlet and outlet tubes for the heat exchanger, but the above effect cannot be obtained when the content is 〇·9 mass to the amount of % or less. When the effect is 1.5% by mass, the effect of increasing the strength is saturated, and on the other hand, the deformation resistance during hot working is increased, and the workability at the time of forming the inlet and outlet tubes for the heat exchanger is reduced, for example, the workability of the extrusion is lowered. Therefore, the content of Μη of the inlet and outlet pipes should be 0.9 to 1.5% by mass, but g is preferably 1.0 to 1.2% by mass. Further, in the aluminum pipe of the present invention, Ζη is diffused from the outermost surface of the outer peripheral surface to the surface layer portion having a depth of 60 μm or more, so that the potential of the surface layer portion is low, and the surface portion other than the surface layer portion is sacrificed to corrode the surface portion to prevent aluminum. The pipe is corroded, but the above effect cannot be obtained when the η η concentration of the surface layer portion is 0 or less. On the other hand, when it is more than 0.70 mass%, there is no problem in the corrosion resistance of the aluminum pipe itself, but if it is more than 0.70 mass%, for example, an aluminum pipe will be manufactured as described later, and heat is simultaneously performed in the heat exchanger. When the exchange tube and the heat sink are φ brazed, it is necessary to melt a large amount of Ζη on the surface of the heat exchange tube, and it is not possible to ensure the heat exchange tube of the heat exchanger manufactured, or the corrosion resistance of the heat exchange tube and the heat sink of the heat sink. . Therefore, the ηη concentration of the surface layer portion should be 〇·20 to 0.70 mass%. Moreover, the Ζη diffusion distance from the outermost surface of the outer surface of the aluminum tube is at most _ 1 Ο Ο μ m. The aluminum tube according to the present invention does not impart chromate treatment to prevent the occurrence of pitting. Further, Μη is 0.9 to 1.5% by mass, and is formed by alloying the remaining portion A1 and the unavoidable -7- 1304445 from impurities, and Ζη diffused from the outermost surface of the outer peripheral surface to the surface layer having a depth of 60 μm or more, and the surface layer is Ζπ Since the concentration is only 〇·2〇 to 0.70% by mass, it can be produced simply and inexpensively. The aluminum tube according to the present invention is preferably a Cu content of 〇·〇1% by mass or less as an unavoidable impurity. The incorporation of a small amount of Cu as an unavoidable impurity also reduces the pitting resistance of the aluminum tube. The aluminum tube according to the present invention is preferably 0.25 mass% or less as an unacceptable Fe content of 0.25 mass% or less. Although Fe, which cannot avoid impurities, has no influence on the degree of Cu, it has the effect of reducing the pitting resistance of the aluminum tube. φ In the aluminum tube according to the present invention, it is preferable that the Si content of the unavoidable substance is 0.25 mass% or less. As Si, which cannot avoid impurities, like Fe, there is a concern that the pitting corrosion resistance of the aluminum tube is lowered. According to the aluminum pipe of the present invention, it is preferable that the Mg content of the unavoidable substance is 0·30% by mass or less. As the M g-based solderability and workability in which impurities are unavoidable, for example, it is possible to reduce the squeezing property and increase the processing cost. The method for manufacturing a manifold according to the present invention is characterized in that it contains μ η 0 · 9 〜1 · 5 mass%, and the remaining part Α1 and the alloy which cannot avoid the impurities are formed into a tube material, and the surface is formed by 2.0 to 16. The aluminum material of the g/m2 ζ 熔 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 According to the manufacturing method of the invention, the Zn melted layer formed on the surface of the aluminum material is evaporated and diffused on the surface layer portion of the outer peripheral surface of the tube material during the post process heating. Further, the 熔η melt layer defining the surface of the aluminum material is 2 〇~16.〇g/m2 and the total Zn amount is 75 to 600 g. When the lower limit 値 or less, the surface layer of the manufactured aluminum tube '8- 1304445 cannot be made. The Zn concentration is 0.20% by mass or more, and when the upper limit is exceeded, the Zn concentration in the surface layer portion exceeds 0.70% by mass. Further, according to the method for producing an aluminum tube of the present invention, when the heating temperature and the heating time are below the lower limit 値, the Zn evaporation from the Zn melt layer and the diffusion of the evaporated Zn to the surface layer portion of the tube material are insufficient, and the aluminum tube cannot be manufactured. The Zn concentration in the surface layer portion is 0.20% by mass or more, and when the upper limit is exceeded, the aluminum tube is produced. For example, when the heat exchange tube of the heat exchanger is brazed and the heat sink is brazed as described later, an aluminum material such as a heat sink is taken. The base material is melted, or Zn which is sprayed on the surface of the heat exchange tube is excessively diffused in the heat exchange tube, and there is a possibility of causing corrosion and leakage. Further, the heating temperature is preferably 5 8 5 to 6 0 5 °C. According to the method for producing an aluminum tube of the present invention, the aluminum tube can be manufactured relatively simply and at a high cost. According to the method for producing an aluminum tube of the present invention, it is preferable that the content of Mn in the tube alloy is 1.0 to 1.2% by mass. Further, it is preferable that the tube alloy is formed as a Cu content which cannot avoid impurities and is 0·01% by mass or less. It is preferable that the tube alloy is formed as an unavoidable impurity, and the Fe content is 0.25 mass% or less. It is preferable that the amount of Si contained in the tube alloy as an unavoidable impurity is 0.25 mass% or less. Further, it is preferable that the tube alloy is formed as a Mg content of 30% by mass or less, which is an unavoidable impurity. According to the manufacturing method of the aluminum tube of the present invention, the aluminum material is a plurality of heat exchange tubes in the heat exchanger, and the surface of each heat exchange tube forms a Zn spray layer of 2.0 to 16.0 g/m 2 and is on the surface of all the heat exchange tubes. The total Zn content of the Zn sprayed layer is 75 ～7 〇〇g, and the furnace is a winter welded 1304045 furnace with a brazed heat exchange tube, an aluminum header and an aluminum heat sink, and a heat exchange tube for brazing an inert gas atmosphere, In the case of the header box and the heat sink, there is a case where the tube is heated. In this case, at the same time as manufacturing a heat exchanger - an aluminum tube can be manufactured, so that no special equipment is required, and the manufacturing cost becomes low. (4) Embodiments Preferred Embodiments for Carrying Out the Invention Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the first embodiment, a condenser (1) for a vehicle air conditioner using a chlorofluorocarbon-based refrigerant is provided with a pair of aluminum headers (2) and (3), which are arranged in parallel with each other at intervals; Extruded flat material refrigerant flow pipe (3) (heat exchange pipe) φ, side-by-side connection at each of two headers (2) (3); aluminum brazed wave heat sink (5) 'configuration The ventilation gap between the adjacent refrigerant flow pipes (4) is simultaneously brazed to the two refrigerant flow pipes (4); the aluminum extruded profile inlet pipe (6) is welded to the peripheral wall of the first header (2) The upper end portion; the aluminum extruded material outlet pipe (7) is welded to the lower end portion of the peripheral wall of the second header tank (3); the first partition plate (8) is disposed in the first header tank (2) The upper position of the middle position; and the second compartment plate (9) are disposed inside the lower position than the middle of the second header (3). As the refrigerant flow pipe (4), it is also possible to use a fusion pipe. The number of refrigerant flow pipes (4) between the φ inlet pipe (6) and the first partition plate (8), and the refrigerant flow pipe between the first partition plate (8) and the second partition plate (9) (4) The number of branches, the number of refrigerant flow pipes (4) between the second compartment plate (9) and the outlet pipe (7) is reduced in order from the top to form a passage group, and the gas phase flows from the inlet pipe (6). The refrigerant. 'To the outlet. The mouth tube (7) flows out in the liquid phase, and makes a serpentine flow in the condenser in each channel group unit. The inlet pipe (6) and the outlet pipe (7) are formed of an alloy containing Μη 0.9 to 1.5% by mass, -10-13〇4445, and the unavoidable impurities, respectively, from the outermost surface of the outer peripheral surface to a depth of 60 μm or more. The Zn in the surface layer portion is diffused, and the Zn concentration in the surface portion is 0.20 to 0.70% by mass. The content of Μη in the alloy forming the inlet pipe (6) and the outlet pipe (7) is preferably 1.〇~1·2 mass%. Further, in the alloy, it is unavoidable that the amount of Cu 5 in the impurities is 0.01% by mass or less, and the Fe content is 0.25 mass% or less, and the Si content is 〇25 mass% or less, and the same g content is Q · 3 〇 Below mass%. The inlet pipe (6) and the outlet pipe (7) are manufactured, for example, in a secondary manner. First, the inlet and outlet tube materials were extruded using the alloy as described above. Further, a pair of aluminum headers (2) (3), a plurality of aluminum extruded refrigerant flow tubes (4), and a plurality of aluminum brazing sheets for forming a condenser (1) shown in Fig. 1 are prepared. Piece (5). A plurality of tube insertion holes are formed in the two headers (2) and (3), respectively. Further, on the surface of each of the refrigerant flow tubes (4), a Zn melt layer of 2.0 to 16.0 g/m 2 'ideally 2.0 to 8.0 g/m 2 is formed, and a Zn spray layer on the surface of all the refrigerant flow tubes (4) is formed. The total amount of Zn is from 75 to 600 g, preferably from 75 to 300 g. Further, a pair of headers (2) and (3) are disposed at intervals, and a plurality of refrigerant flow tubes (4) and a plurality of wave fins (5) are disposed to each other, and both ends of the refrigerant flow tube (4) are inserted into two sets. The tube insertion holes of the tube box (2) (3) are formed as an assembly. Then, the composition is coated with a fluoride-based flux (near the eutectic composition of potassium fluoride and aluminum fluoride), placed in a furnace for making an inert gas atmosphere, and all the inlet and outlet pipes are placed in the above In the furnace. Thereafter, it is heated at 580 to 6 1 ° C for 3 to 15 minutes. Thus, the brazing -11-11304445 material layer brazing refrigerant flow pipe (4) and the header tank (2) (3) provided in the header tank (2) (3) are simultaneously utilized, and the wave fins (5) are simultaneously utilized. The brazing material is hard-welded together with the refrigerant flow pipe (4) and the header (2) to manufacture the condenser (1), and at the same time, the inlet pipe (6) and the outlet pipe (7) are manufactured. The condenser (1) is a refrigeration cycle using a fluorocarbon system refrigerant together with a compressor and an evaporator, and is used as a vehicle air conditioner, for example, in a vehicle. In the above embodiment, the aluminum pipe according to the present invention is formed by a refrigeration cycle using a fluorocarbon refrigerant, and is used as a condenser inlet pipe and an outlet pipe of a vehicle air conditioner, but is also used as the vehicle air. The evaporator inlet and outlet tubes of the regulator. Further, the aluminum pipe according to the present invention is also used as an inlet and outlet pipe for a heat exchanger for an automobile oil cooler or a car water tank. Further, the aluminum pipe according to the present invention is also used as a pipe between a compressor, a condenser, and an evaporator of a vehicle air conditioner which is a refrigeration cycle using a compressor, a condenser, and an evaporator by using a chlorofluorocarbon refrigerant. a compressor, air cooler, intermediate heat exchanger, expansion of a vehicle air conditioner, which is a compressor, an air cooler, an intermediate heat exchanger, an expansion valve, and an evaporator, and is a refrigerating cycle using c 0 2 refrigerant. Piping between the valve and the evaporator. Furthermore, the aluminum tube according to the present invention is also used as a compressor, an air cooler, an intermediate heat exchanger, an expansion valve, and an evaporator, and is made of a vehicle air conditioner by a refrigerating cycle using a co2 refrigerant. Inlet and outlet tubes between the cooler or evaporator. Example 1 Using 1.0% by mass of Μη, Cu 0.01% by mass or less, Si 0.〇6 mass%, Fe 0.12 mass%, Mg 0.01 mass%, Cr 0.01 mass%, -12- 1304445
Ti 0.01質量％以下' Zn 0.01質量％以下，剩餘部分A1及 無法避免不純物所成合金，分別擠出形成外徑1 2 · 7 m m、周 壁之壁厚1.0mm之出口管材各50克。各入口管材之長度 239 nim、各出口管材之長度439mm，所有入口管材及出口 管材之外周面表面積係總共1.7 3 2m2。 另一方面，準備外周面之表面積爲〇.〇219m2的鋁擠出形 材製扁平狀冷媒流動管（4) 1 750克，形成8g/m2之Zri熔射 層在各冷媒流通管（4)的外周面。形成於所有冷媒流通管（4) 外周面的Zn熔射層合計Zri量爲306.6g。 再者’準備各個具35個管插入孔的一對鋁製集管箱（2) (3)50組’及兩面具硬焊材層的鋁硬焊片製波形散熱片（5) 1 8 00 個 〇 然後’隔以間隔配置一對集管箱（2)(3)，同時互相以 35 支之冷媒流通管（4)及36個波形散熱片（5)，配置使波形散 熱片（5)至兩端側，準備將冷媒流通管（4)之兩端部插入兩集 管箱（2)(3)的管插入孔所成組合體50組。接著，對該等組 合體塗布氟化物系助熔劑（氟化鉀及氟化鋁的共晶組成近 旁者），放入作成氮氣環境的爐中。又，放入所有入口管材 及出口管材在上述爐中。接著以56 °C /min之加熱速度自30t 加熱至80°C，保持5 80°C 8.5min之後以冷卻速度48°C /min 降溫至30(TC，再急冷至30。(：。如此，利用設冷媒流通管（4) 及集管箱（2 )(3 )於集管箱（2 )( 3 )的硬焊材層作硬焊，同時將 冷媒流通管（4)及波形散熱片（5)利用波形散熱片（5)的硬焊 材，一起作硬焊製造凝結器（1 )，同時製造了凝結器用入口 -13- 1304445 管（6)及出口管（7)。 比較例1 作爲入口管材及出口管材，除使用由jIS A3003所成者 ’其他與上述實施例同樣製造了凝結器用入口管及同出口 管。 比較例2 作爲入口管材及出口管材，除使用由JIS A1100所成者 ’其他係與上述實施例1同樣製造了凝結器用入口管及同 出口管。 0 比較例3 使用貫J也例1之合金濟出成形，其後照無施予任何處理 的原樣者作入口管及出口管。 評價試驗1 從實施例1、比較例1、比較例2及比較例3所製造入口 管中各個抽出各1支，分別對該等施予SWAAT 960hr試驗 調查其腐蝕狀況。其結果，在實施例i之入口管最大腐蝕 深度爲6 4 2 μ m，無產生了穿通周壁的孔蝕。對於此，比較 鲁 例1〜3之入口管係產生了穿通周壁的孔蝕。 評價試驗2 從實施例1製造的入口管及出口管中分別抽出各2支， 由電子束微分析儀（ΕΡΜΑ)，測定自外周面之最表面的zn 最大擴散距離及在最大擴散距離的Zn濃度。其結果表示於 表1。又對該等之入口管及出口管分別施予SWAAT 960hr 試驗調查了最大腐蝕深度。其結果亦表示在表i。 -14- 1304445 [表1] 試料No Zn濃度 最大擴散距離 最大腐蝕深度 入口管 1 0.32質量％ 65μηι 206μτη 2 0.26質量％ 65μπ) 231 μτη 出口管 3 0.43質量％ - 70μηι 521 μιτι 4 0.43質量％ 75μπι 446μηι 評價試驗3 從實施例1製造的入口管及出口管中分別抽出各2支， 以硝酸洗淨後，由電子束微分析儀（ΕΡΜΑ)，測定自外周面 之最表面的Ζη最大擴散距離及在最大擴散距離的Ζιι濃度 。其結果表示於表2。又對該等之入口管及出口管分別施 予SWAAT 9 6 0hr試驗調查了最大腐蝕深度。其結果表示於 表2 〇 [表2] 試料No Zn濃度 最大擴散距離 最大腐蝕深度 入口管 5 0.21質量％ 70μηι 462μιη 6 0.23質量％ 60μηι 159μπι 出口管 7 0.25質量％ 65μπι 120μπι 8 0.28質量％ 75μηι 144μπι 產業上之利用可能性 本發明之鋁管，適於具有作爲氟氯烷系冷媒的車輛空氣 調節器之凝結器或蒸發器，使用C02冷媒的車輛空氣調節 器之氣冷器或蒸發器、汽車用油冷器、汽車用水箱等使用 的熱交換器用出入口管、或具壓縮機、凝結器及蒸發器且 -15- 1304445 使用氟氯院系冷媒的車輛空氣調節器之壓縮機、凝結器及 蒸發器間的配管使用，或具有壓縮機、氣冷器、中間熱交 換器、膨脹閥及蒸發器且使用c〇2冷媒的車輛空氣調節器 之壓縮機、氣冷器、中間熱交換器、膨脹閥及蒸發器間的 配管使用。。 (五）圖式簡單說明 第1圖依本發明其鋁管具有作爲入口管及出口管，表示 具使用氟氯院系冷媒的車輛空氣調節器的凝結器斜視圖。 [主要部分之代表符號說明] 1 凝結器 2、3 第1、第2集管箱 4 扁平狀冷媒流動管（熱交換管） 5 波形散熱片 6 鋁擠出形材製入口管 7 鋁擠出形材製出口管 8 第1隔間板 9 第2隔間板 -16-Ti 0.01% by mass or less 'Zn 0.01% by mass or less, the remaining portion A1 and the alloy formed by the impurities were unavoidable, and 50 g of each of the outlet pipes each having an outer diameter of 1 2 · 7 m m and a wall thickness of 1.0 mm was extruded. The length of each inlet pipe is 239 nim, the length of each outlet pipe is 439 mm, and the total surface area of all inlet pipes and outlet pipes is 1.7 3 2 m2. On the other hand, 1 750 g of a flat refrigerant flow pipe (4) having an outer peripheral surface area of 〇.〇219 m2 was prepared, and a Zg spray layer of 8 g/m2 was formed in each refrigerant flow pipe (4). The outer perimeter. The total amount of Zri of the Zn melted layer formed on the outer peripheral surface of all the refrigerant flow tubes (4) was 306.6 g. Furthermore, 'prepare a pair of aluminum headers with 35 tube insertion holes (2) (3) 50 sets 'and two masks of brazing material layer of aluminum brazed sheet wave fins (5) 1 8 00 Then, a pair of headers (2) and (3) are arranged at intervals, and 35 refrigerant flow tubes (4) and 36 wave fins (5) are arranged at the same time to configure the wave fins (5). To both end sides, it is prepared to insert both end portions of the refrigerant flow pipe (4) into the assembly 50 of the pipe insertion holes of the two headers (2) and (3). Next, the composition was coated with a fluoride-based flux (near the eutectic composition of potassium fluoride and aluminum fluoride), and placed in a furnace in a nitrogen atmosphere. Further, all of the inlet and outlet pipes are placed in the above furnace. Then, it is heated from 30t to 80°C at a heating rate of 56 °C /min, and kept at 580 °C for 8.5min, then cooled to 30°C at a cooling rate of 48 °C /min, and then quenched to 30. (:. The refrigerant flow pipe (4) and the header (2) (3) are used for brazing in the hardened material layer of the header (2) (3), and the refrigerant flow pipe (4) and the wave fin ( 5) Using the hard-welded material of the wave fin (5), the coagulator (1) is fabricated by brazing together, and the inlet-13-1304445 tube (6) and the outlet tube (7) for the condenser are manufactured. Comparative Example 1 The inlet pipe and the outlet pipe were made of the jIS A3003. Other than the above-described examples, the inlet pipe and the outlet pipe of the condenser were manufactured. Comparative Example 2 As the inlet pipe and the outlet pipe, except for the use of JIS A1100. In the same manner as in the above-mentioned Example 1, the inlet pipe and the outlet pipe of the condenser were produced. 0 Comparative Example 3 The alloy of Example 1 was used for the formation of the alloy, and the original pipe was used as the inlet pipe without any treatment. And an outlet tube. Evaluation Test 1 Manufactured from Example 1, Comparative Example 1, Comparative Example 2, and Comparative Example 3 One of each tube was taken out, and the corrosion condition was investigated by the SWAAT 960 hr test. As a result, the maximum corrosion depth of the inlet tube of Example i was 6 4 2 μ m, and no hole was formed through the peripheral wall. For this, the inlet pipe system of Comparative Examples 1 to 3 produced pitting corrosion through the peripheral wall. Evaluation Test 2 Two of each of the inlet pipe and the outlet pipe manufactured in Example 1 were taken out, and the electron beam micro analyzer was used. (ΕΡΜΑ), the zn maximum diffusion distance from the outermost surface of the outer peripheral surface and the Zn concentration at the maximum diffusion distance were measured. The results are shown in Table 1. The inlet pipe and the outlet pipe were respectively subjected to SWAAT 960hr test. The maximum corrosion depth. The results are also shown in Table i. -14- 1304445 [Table 1] Sample No Zn concentration Maximum diffusion distance Maximum corrosion depth Entrance tube 1 0.32% by mass 65μηι 206μτη 2 0.26 mass% 65μπ) 231 μτη Outlet tube 3 0.43 Mass % - 70μηι 521 μιτι 4 0.43质量% 75μπι 446μηι Evaluation Test 3 Each of the inlet pipe and the outlet pipe manufactured in Example 1 was separately extracted and washed with nitric acid. An electron beam microanalyzer (ΕΡΜΑ) was used to measure the maximum diffusion distance of Ζη from the outermost surface of the outer peripheral surface and the concentration of Ζι in the maximum diffusion distance. The results are shown in Table 2. The inlet and outlet tubes of the respective surfaces were respectively administered. The maximum corrosion depth was investigated by the SWAAT 9 6 0hr test. The results are shown in Table 2 〇 [Table 2] Sample No Zn Concentration Maximum diffusion distance Maximum corrosion depth Entrance tube 5 0.21% by mass 70μηι 462μιη 6 0.23 mass% 60μηι 159μπι Outlet tube 7 0.25 Mass % 65μπι 120μπι 8 0.28质量% 75μηι 144μπι Industrial Applicability The aluminum tube of the present invention is suitable for a condenser or evaporator having a vehicle air conditioner as a chlorofluorocarbon refrigerant, and a vehicle air conditioning using C02 refrigerant Vehicles for use in heat exchangers for air coolers or evaporators, automotive oil coolers, automotive water tanks, etc., or vehicles with compressors, condensers and evaporators, and -15- 1304445 using fluorocarbon refrigerants Use of piping between compressor, condenser, and evaporator of air conditioner, or with compressor, air cooler, intermediate Exchanger, an expansion valve and an evaporator and a vehicle air conditioner using the refrigerant c〇2 compressor, gas cooler, intermediate heat exchanger, an expansion valve between the pipe and the use of an evaporator. . (5) Brief Description of the Drawings Fig. 1 is a perspective view of a condenser of a vehicle air conditioner using a fluorocarbon system refrigerant as an inlet pipe and an outlet pipe according to the present invention. [Description of representative symbols of main parts] 1 Condenser 2, 3 1st, 2nd header tank 4 Flat refrigerant flow tube (heat exchange tube) 5 Waveform fins 6 Aluminum extrusion material inlet tube 7 Aluminum extrusion Shaped material outlet pipe 8 1st compartment board 9 2nd compartment board-16-