JPH025809B2 - - Google Patents
Info
- Publication number
- JPH025809B2 JPH025809B2 JP56186366A JP18636681A JPH025809B2 JP H025809 B2 JPH025809 B2 JP H025809B2 JP 56186366 A JP56186366 A JP 56186366A JP 18636681 A JP18636681 A JP 18636681A JP H025809 B2 JPH025809 B2 JP H025809B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- corrosion
- water storage
- pitting corrosion
- storage container
- 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.)
- Expired - Lifetime
Links
- 229910000838 Al alloy Inorganic materials 0.000 claims description 46
- 230000007797 corrosion Effects 0.000 claims description 43
- 238000005260 corrosion Methods 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000011162 core material Substances 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000005253 cladding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 229910018134 Al-Mg Inorganic materials 0.000 description 5
- 229910018467 Al—Mg Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
Description
この発明は、耐孔食性にすぐれたAl合金製貯
水容器に関するものである。
従来、一般に、水泳プールや貯水池、さらに貯
水タンクなどの貯水容器には、JIS5052や同5083
などのAl−Mg系合金、すなわちMg：2.2〜4.9％
を含有し、さらにCr：0.05〜0.35％およびMn：
１％以下のうちの１種または２種以上を含有し、
残りがAlと不可避不純物からなる組成（以上重
量％、以下％は重量％を示す）を有するAl−Mg
系合金の単板材が、比較的良好な耐食性を有し、
かつすぐれた成形加工性および中程度以上の強度
をもつことから用いられている。
なお、このAl−Mg系合金が比較的良好な耐食
性を示すのは、表面にこの合金特有の強固な自然
酸化皮膜が形成されることに起因するものであ
る。
しかしながら、上記のAl−Mg系合金の単板材
で構成された貯水容器においては、表面に形成し
た酸化皮膜中に不可避的に不純物が含有されてい
たり、熱的あるいは機械的に傷が付いたりする
と、その部分は充分な耐食性を発揮することがで
きないことから選択的に溶解するようになり、こ
の結果著しい局部腐食、すなわち孔食となつて現
われることがしばしば起るものであつた。
そこで、本発明者等は、上述のような観点か
ら、孔食発生のないAl合金製貯水容器を開発す
べく研究を行なつた結果、貯水容器を、
Mg：3.1〜5.6％、
を含有し、さらに、
Cr：0.05〜0.35％、 Mn：0.05〜１％、
のうちの１種または２種、
を含有し、残りがAlと不可避不純物からなる組
成を有するAl合金芯材の片面、あるいは両面に、
Mg：３〜5.6％、 Zn：0.1〜１％、
を含有し、さらに必要に応じて、
Cr：0.05〜0.35％、 Mn：0.05〜１％、
のうちの１種または２種、
を含有し、残りがAlと不可避不純物からなる組
成を有するAl合金皮材をクラツドしてなるAl合
金複合材で構成すると、この結果のAl合金製貯
水容器においては、これを構成するAl合金芯材
によつて良好な成形加工性と中程度以上の強度が
確保され、一方MgとZnの共存作用でAl合金皮材
の表面に形成された自然酸化皮膜によつて耐食性
をもつようになるほか、Al合金皮材中に不可避
不純物が含有したり、熱的あるいは機械的に傷が
付いても、Znの作用で横広がりの全面腐食型と
なるために孔食の発生が抑制されるようになり、
さらにCuイオンを含有するような苛酷な環境下
では、Al合金皮材に孔食が発生するような場合
があつても、Al合金芯材に比してAl合金皮材の
方がZn含有によつて電気化学的に卑となること
から、Al合金皮材が犠牲陽極効果を発揮し、Al
合金芯材を防食するので、孔食がAl合金芯材に
及ぶことはなく、したがつて長期に亘る使用が可
能となるという知見を得たのである。
この発明は、上記知見にもとづいてなされたも
のであつて、
Mg：3.1〜5.6％、
を含有し、さらに、
Cr：0.05〜0.35％、 Mn：0.05〜１％、
のうちの１種または２種、
を含有し、残りがAlと不可避不純物からなる組
成を有するAl合金芯材の片面、または両面に、
Mg：３〜5.6％、 Zn：0.1〜１％、
を含有し、さらに必要に応じて、
Cr：0.05〜0.35％、 Mn：0.05〜１％、
のうちの１種または２種、
を含有し、残りがAlと不可避不純物からなる組
成を有するAl合金皮材をクラツドしてなるAl合
金複合材で構成した、耐孔食性にすぐれたAl合
金製貯水容器に特徴を有するものである。
つぎに、この発明のAl合金製貯水容器におい
て、これを構成するAl合金複合材のAl合金芯材
およびAl合金皮材の成分組成を上記の通りに限
定した理由を説明する。
Ａ Al合金芯材
(a) Mg
Mg成分には強度を向上させる作用がある
が、その含有量が、3.1％未満では所望の強
度を確保することができず、一方その含有量
が5.6％を越えると、成形加工性が低下する
ようになることから、その含有量を3.1〜5.6
％と定めた。
(b) CrおよびMn
これらの成分には、結晶粒を微細化して強
度を向上させる作用があるが、その含有量が
それぞれCr：0.05未満およびMn：0.05％未
満では、所望の強度が得られず、一方それぞ
れCr：0.35％およびMn：１％を越えて含有
させると、鋳造時に巨大晶出物が形成され易
くなり、特性劣化を招くようになることか
ら、それぞれの含有量を、Cr：0.05〜0.35
％、Mn：0.05〜１％と定めた。
Ｂ Al合金皮材
(a) Zn
Zn成分には、Mgとの共存において皮材表
面に自然酸化皮膜を形成し、もつて容器の耐
食性を向上させ、かつ腐食時の溶解を横広が
りの全面腐食型にして孔食の発生を抑制し、
さらに苛酷な環境下において、たとえば皮材
に孔食が発生しても、Zn含有によつてもた
らされる犠牲陽極効果によつて芯材に孔食が
及ぶのを阻止する作用があるが、その含有量
が0.1％未満では前記作用に所望の効果が得
られず、一方その含有量が１％を越えると、
逆に不均一腐食や孔食が発生するようになる
と共に、腐食量も増大するようになつて皮材
の芯材に対する犠牲陽極効果が比較的早期に
消減するようになることから、その含有量を
0.1〜１％と定めた。
(b) Mg
Mg成分には、上記のようにZnとの共存に
おいて強固な自然酸化皮膜を形成し、もつて
容器にすぐれた耐食性を付与し、かつ皮材を
固溶強化する作用があるが、その含有量が３
％未満では前記作用に所望のすぐれた効果を
発揮させることができず、一方その含有量が
5.6％を越えると、熱間圧延などの加工性が
劣化するようになるばかりでなく、熱処理条
件によつては結晶粒界にAl−Mg系の析出物
が形成されるようになつて粒界腐食をはじめ
とする不均一腐食や孔食が発生するようにな
ることから、その含有量を３〜5.6％と定め
た。
(c) CrおよびMn
これらの成分には、結晶粒を微細化して強
度を向上させると共に、全面腐食型の腐食形
態を強化して不均一腐食や孔食の発生を著し
く抑制する作用があるので、特にこれらの特
性が要求される苛酷な条件での使用に際して
必要に応じて含有されるが、その含有量がそ
れぞれCr：0.05％未満およびMn：0.05％未
満では、前記作用に所望の向上効果が得られ
ず、一方その含有量がそれぞれCr：0.35％お
よびMn：１％を越えると、鋳造時に巨大晶
が形成され易くなつて不均一腐食が発生する
ようになり、かつ腐食の進行も速くなること
から、その含有量を、それぞれCr：0.05〜
0.35％、Mn：0.05〜１％と定めた。
つぎに、この発明のAl合金製貯水容器を実施
例により具体的に説明する。
通常の溶解鋳造法によりそれぞれ第１表に示さ
れる成分組成をもつた芯材用Al合金１〜８、皮
材用Al合金Ａ〜Ｌ、さらに皮材用Al合金ａ〜ｄ
のインゴツトを形成し、なお前記皮材用Al合金
ａ〜ｄは、いずれも構成成分のうち少なくともい
ずれの成分含有量（第１表に※印を付したもの）
がこの発明の範囲から外れた組成をもつものであ
り、またいずれのAl合金も不可避不純物として
Fe：0.21〜0.22％およびSi：0.08〜0.09％を
The present invention relates to an Al alloy water storage container with excellent pitting corrosion resistance. Conventionally, water storage containers such as swimming pools, reservoirs, and water storage tanks generally comply with JIS5052 and JIS5083.
Al-Mg alloys such as Mg: 2.2-4.9%
Contains Cr: 0.05-0.35% and Mn:
Contains one or more of 1% or less,
Al-Mg with a composition in which the remainder is Al and unavoidable impurities (the above weight percent, the below weight percent)
The veneer material of the alloy has relatively good corrosion resistance,
It is used because it has excellent moldability and medium or higher strength. The reason why this Al--Mg alloy exhibits relatively good corrosion resistance is due to the formation of a strong natural oxide film unique to this alloy on its surface. However, in water storage containers made of the above-mentioned Al-Mg alloy veneer, impurities are unavoidably contained in the oxide film formed on the surface, or thermal or mechanical scratches may occur. Since these parts cannot exhibit sufficient corrosion resistance, they tend to dissolve selectively, and as a result, severe local corrosion, that is, pitting corrosion, often occurs. Therefore, from the above-mentioned viewpoint, the present inventors conducted research to develop a water storage container made of an Al alloy that does not cause pitting corrosion, and as a result, the present inventors created a water storage container containing Mg: 3.1 to 5.6%. , and further contains one or two of the following: Cr: 0.05 to 0.35%, Mn: 0.05 to 1%, and the remainder is Al and unavoidable impurities. Contains Mg: 3 to 5.6%, Zn: 0.1 to 1%, and, if necessary, Cr: 0.05 to 0.35%, Mn: 0.05 to 1%, and one or two of the following. When an Al alloy composite material is constructed by cladding an Al alloy skin material with a composition of Al and unavoidable impurities, the resulting Al alloy water storage container has an Al alloy core material that constitutes it. This ensures good formability and medium or higher strength, while the natural oxide film formed on the surface of the Al alloy skin due to the coexistence of Mg and Zn provides corrosion resistance. Even if the Al alloy skin material contains unavoidable impurities or is scratched thermally or mechanically, the Zn action causes horizontally spreading general corrosion, suppressing the occurrence of pitting corrosion. ,
Furthermore, even though pitting corrosion may occur in Al alloy skin materials in harsh environments containing Cu ions, Al alloy skin materials contain more Zn than Al alloy core materials. Therefore, since it becomes electrochemically base, the Al alloy skin material exerts a sacrificial anode effect, and the Al
Since the alloy core material is protected from corrosion, pitting corrosion does not extend to the Al alloy core material, and it has been found that it can be used for a long period of time. This invention was made based on the above knowledge, and contains Mg: 3.1 to 5.6%, and further contains one or two of the following: Cr: 0.05 to 0.35%, Mn: 0.05 to 1%. Mg: 3 to 5.6%, Zn: 0.1 to 1%, on one or both sides of an Al alloy core material having a composition of seeds, and the remainder consisting of Al and unavoidable impurities, and further as necessary. Cr: 0.05 to 0.35%, Mn: 0.05 to 1%, one or two of the following, and the remainder is Al and unavoidable impurities. It is characterized by an Al alloy water storage container that is made of an alloy composite material and has excellent pitting corrosion resistance. Next, in the Al alloy water storage container of the present invention, the reason why the compositions of the Al alloy core material and the Al alloy skin material of the Al alloy composite material constituting the container are limited as described above will be explained. A Al alloy core material (a) Mg The Mg component has the effect of improving strength, but if the content is less than 3.1%, the desired strength cannot be secured; on the other hand, if the content is less than 5.6%, If the content exceeds 3.1 to 5.6, the moldability will decrease.
%. (b) Cr and Mn These components have the effect of refining crystal grains and improving strength, but if their content is less than 0.05% of Cr and less than 0.05% of Mn, the desired strength cannot be obtained. On the other hand, if the content exceeds Cr: 0.35% and Mn: 1%, giant crystallized substances are likely to be formed during casting, leading to property deterioration. 0.05~0.35
%, Mn: 0.05 to 1%. B Al alloy skin material (a) Zn When Zn components coexist with Mg, they form a natural oxide film on the surface of the skin material, which improves the corrosion resistance of the container and prevents dissolution during corrosion from spreading across the entire surface. mold to suppress the occurrence of pitting corrosion,
Furthermore, even if pitting corrosion occurs in the skin material under harsh environments, the sacrificial anode effect brought about by the Zn content has the effect of preventing pitting corrosion from reaching the core material. If the amount is less than 0.1%, the desired effect cannot be obtained in the above action, while if the content exceeds 1%,
Conversely, as uneven corrosion and pitting corrosion begin to occur, the amount of corrosion also increases, and the sacrificial anode effect on the core material of the skin material disappears relatively quickly. of
It was set at 0.1-1%. (b) Mg As mentioned above, the Mg component forms a strong natural oxide film in coexistence with Zn, gives the container excellent corrosion resistance, and has the effect of solid solution strengthening of the coating material. , its content is 3
If the content is less than
If it exceeds 5.6%, not only will workability in hot rolling etc. deteriorate, but depending on the heat treatment conditions, Al-Mg-based precipitates may be formed at grain boundaries, leading to the formation of Al-Mg-based precipitates at grain boundaries. The content was set at 3 to 5.6% because it causes uneven corrosion including corrosion and pitting corrosion. (c) Cr and Mn These components have the effect of refining crystal grains and improving strength, as well as reinforcing the general corrosion type and significantly suppressing the occurrence of uneven corrosion and pitting corrosion. , is included as necessary when used under harsh conditions where these properties are particularly required, but if the content is less than 0.05% Cr and less than 0.05% Mn, the desired improvement effect on the above-mentioned functions may not be achieved. On the other hand, if the content exceeds Cr: 0.35% and Mn: 1%, respectively, giant crystals are likely to be formed during casting, causing uneven corrosion, and corrosion progresses quickly. Therefore, the content is Cr: 0.05 ~
0.35%, Mn: 0.05 to 1%. Next, the Al alloy water storage container of the present invention will be specifically explained with reference to Examples. Al alloys 1 to 8 for the core material, Al alloys A to L for the skin material, and Al alloys a to d for the skin material, each having the composition shown in Table 1 by the usual melting and casting method.
The above-mentioned Al alloys a to d for skin materials each have a content of at least one of the constituent components (those marked with * in Table 1).
has a composition outside the scope of this invention, and any Al alloy contains unavoidable impurities.
Fe: 0.21~0.22% and Si: 0.08~0.09%
【表】
含有するものであり、ついでこれらの各種Al合
金インゴツトにそれぞれ通常の条件で均質化処理
を施した後、同じく通常の条件で熱間圧延を施し
て、芯材用Al合金１〜８は板厚：８mmの熱延板
に、また皮材用Al合金Ａ〜Ｌおよび同ａ〜ｄは
板厚：１mmの熱延板とし、これらの熱延板を第２
表に示される組合せで、かつ芯材の上下両面を皮
材ではさむ状態に重ね合わせ、熱間圧延にてクラ
ツドし、引続いて冷間圧延により板厚：１mmの
Al合金複合材とすることにより本発明Al合金製
貯水容器複合素材（以下本発明容器複合素材とい
う）１〜12および比較Al合金製貯水容器複合素
材（以下比較容器複合素材という）１〜４をそれ
ぞれ製造した。
また、比較の目的で、芯材用Al合金の熱延板
に冷間圧延を施して板厚：１mmの単板材とするこ
とにより従来Al合金製貯水容器単板素材（以下
従来容器単板素材という）１〜８を製造した。
つぎに、この結果得られた本発明容器複合素材
１〜12、比較容器複合素材１〜４、および従来[Table] These various Al alloy ingots were then subjected to homogenization treatment under normal conditions, and then hot rolled under the same normal conditions to form Al alloys 1 to 8 for core materials. are hot-rolled sheets with a thickness of 8 mm, and Al alloys A to L for skin materials and a to d are hot-rolled sheets with a thickness of 1 mm.
Using the combinations shown in the table, the upper and lower surfaces of the core material are sandwiched between skin materials, then clad by hot rolling, and then cold rolled to a thickness of 1 mm.
By making the Al alloy composite material, the present invention Al alloy water storage container composite material (hereinafter referred to as the present invention container composite material) 1 to 12 and the comparative Al alloy water storage container composite material (hereinafter referred to as the comparative container composite material) 1 to 4. manufactured respectively. In addition, for the purpose of comparison, a conventional Al alloy water storage container veneer material (hereinafter referred to as conventional container veneer material) was prepared by cold rolling a hot rolled sheet of Al alloy for the core material to obtain a veneer material with a thickness of 1 mm. ) 1 to 8 were produced. Next, the resulting container composite materials 1 to 12 of the present invention, comparative container composite materials 1 to 4, and the conventional
【表】
容器単板素材１〜８について、貯水容器の使用条
件に相当する条件、すなわち1ppmのCuイオン含
有の温度：40℃の水道水に60日間浸漬の条件での
水道水浸漬試験、並びにCl-イオン、SO4 --イオ
ン、およびHCO3 -イオンをそれぞれ100ppm含有
し、さらにCuイオンを1ppm含有する温度：40℃
の水溶液に60日間浸漬の条件での水溶液浸漬試験
を行ない、試験後腐食生成物を除去して腐食減
量、孔食数、および最大孔食深さをそれぞれ測定
した。これらの測定結果を第２表に示した。
第２表に示される結果から、本発明容器複合素
材１〜12は、いずれの浸漬試験においても、皮材
用Al合金の成分組成がこの発明の範囲から外れ
た比較容器複合素材１〜４および従来容器単板素
材１〜８に比して、すぐれた耐食性と耐孔食性を
示し、特に耐孔食性は著しくすぐれていることが
明らかである。
上述のように、この発明のAl合金製貯水容器
は、すぐれた耐食性と耐孔食性を有し、かつこれ
を構成するAl合金複合材のうちの芯材ですぐれ
た成形加工性と中程度以上の強度が確保され、し
かも実用に際して、Cuイオンを多量に含有する
水溶液にさらされるような苛酷な条件下におかれ
ても孔食が芯材に及ぶことはないので、著ししく
長期に亘つての使用を可能とするものである。[Table] Container veneer materials 1 to 8 were subjected to a tap water immersion test under conditions equivalent to the usage conditions of water storage containers, that is, immersed in tap water containing 1 ppm Cu ions at a temperature of 40°C for 60 days, and Contains 100 ppm each of Cl - ions, SO 4 -- ions, and HCO 3 - ions, and further contains 1 ppm Cu ions. Temperature: 40°C
An aqueous solution immersion test was conducted under the condition of immersion in an aqueous solution of for 60 days, and after the test, corrosion products were removed and the corrosion weight loss, pitting corrosion number, and maximum pitting depth were measured. The results of these measurements are shown in Table 2. From the results shown in Table 2, container composite materials 1 to 12 of the present invention were evaluated in all immersion tests as compared to comparative container composite materials 1 to 4, in which the composition of Al alloy for the skin material was outside the scope of the present invention. It is clear that they exhibit superior corrosion resistance and pitting corrosion resistance compared to conventional container veneer materials 1 to 8, and in particular, the pitting corrosion resistance is significantly superior. As mentioned above, the Al alloy water storage container of the present invention has excellent corrosion resistance and pitting corrosion resistance, and the core material of the Al alloy composite material constituting it has excellent formability and a medium or higher resistance to corrosion. In addition, in practical use, pitting corrosion does not extend to the core material even under severe conditions such as exposure to aqueous solutions containing large amounts of Cu ions, so it can be used for a significantly long period of time. This allows for various uses.
Claims (1)
成を有するAl合金芯材の片面、あるいは両面に、 Mg：３〜5.6％、 Zn：0.1〜１％、 を含有し、残りがAlと不可避不純物からなる組
成（以上重量％）を有するAl合金皮材をクラツ
ドしてなるAl合金複合材で構成したことを特徴
とする耐孔食性にすぐれたAl合金製貯水容器。 ２ Mg：3.1〜5.6％、 を含有し、さらに、 Cr：0.05〜0.35％、 Mn：0.05〜１％、 のうちの１種または２種、 を含有し、残りがAlと不可避不純物からなる組
成を有するAl合金芯材の片面、あるいは両面に、 Mg：３〜5.6％、 Zn：0.1〜１％、 を含有し、さらに、 Cr：0.05〜0.35％、 Mn：0.05〜１％、 のうちの１種または２種、 を含有し、残りがAlと不可避不純物からなる組
成（以上重量％）を有するAl合金皮材をクラツ
ドしてなるAl合金複合材で構成したことを特徴
とする耐孔食性にすぐれたAl合金製貯水容器。[Claims] 1 Contains Mg: 3.1 to 5.6%, and further contains one or two of the following: Cr: 0.05 to 0.35%, Mn: 0.05 to 1%, and the remainder is Al. Mg: 3 to 5.6%, Zn: 0.1 to 1%, on one or both sides of an Al alloy core material having a composition consisting of ) A water storage container made of an Al alloy with excellent pitting corrosion resistance, characterized in that it is constructed of an Al alloy composite material made by cladding an Al alloy skin material. 2. A composition containing Mg: 3.1 to 5.6%, and further containing one or two of the following: Cr: 0.05 to 0.35%, Mn: 0.05 to 1%, and the remainder consisting of Al and inevitable impurities. Contains Mg: 3-5.6%, Zn: 0.1-1%, and further contains Cr: 0.05-0.35%, Mn: 0.05-1%, on one or both sides of the Al alloy core material having Pitting corrosion resistant, characterized in that it is made of an Al alloy composite material made by cladding an Al alloy skin material having a composition (by weight %) containing one or two of the following and the remainder consisting of Al and unavoidable impurities. Al alloy water storage container with excellent water resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56186366A JPS5887246A (en) | 1981-11-20 | 1981-11-20 | Composite al alloy material for water tank with superior pitting corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56186366A JPS5887246A (en) | 1981-11-20 | 1981-11-20 | Composite al alloy material for water tank with superior pitting corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5887246A JPS5887246A (en) | 1983-05-25 |
| JPH025809B2 true JPH025809B2 (en) | 1990-02-06 |
Family
ID=16187117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56186366A Granted JPS5887246A (en) | 1981-11-20 | 1981-11-20 | Composite al alloy material for water tank with superior pitting corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5887246A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50110919A (en) * | 1973-10-04 | 1975-09-01 | ||
| JPS54158312A (en) * | 1978-06-05 | 1979-12-14 | Mitsubishi Metal Corp | Pitting corrosion resistant clad |
-
1981
- 1981-11-20 JP JP56186366A patent/JPS5887246A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50110919A (en) * | 1973-10-04 | 1975-09-01 | ||
| JPS54158312A (en) * | 1978-06-05 | 1979-12-14 | Mitsubishi Metal Corp | Pitting corrosion resistant clad |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5887246A (en) | 1983-05-25 |
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