CN102465221A - Aluminum alloy tube resistant to seawater corrosion and preparation method thereof - Google Patents
Aluminum alloy tube resistant to seawater corrosion and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an aluminum alloy tube resistant to seawater corrosion, in particular to an aluminum alloy tube with high seawater corrosion resistance. The aluminum alloy tube is manufactured from magnesium, aluminum and other raw materials through the steps of: melting, stirring, in-furnace modification treatment, impurity removal, fining treatment, online argon refining, purification treatment, casting, homogenization treatment, extrusion, cold drawing and the like. The aluminum alloy tube has the advantages of good seawater corrosion resistance and long service life, is particularly suitable for equipment for low-temperature multi-effect seawater distillation and seawater desalination treatment.
Description
Technical field
The present invention relates to a kind of aluminium-alloy pipe and working method thereof.Specifically, be aluminium-alloy pipe that has high sea water corrosion resistant and preparation method thereof, be particularly useful for the low temperature multiple-effect distillation seawater, seawater is desalinated in the equipment of processing.
Background technology
At present; With the equipment of contact with sea water in employed aluminium-alloy pipe, it comprises the element of following parts by weight: 0.25 part silicon, 0.4 part iron, 0.1 part copper, 0.1 part manganese, 2.2～2.8 parts magnesium, 0.15～0.35 part chromium, 0.1 part zinc and 9.59 parts～96.7 parts aluminium.Because constituent contents such as the silicon in this aluminium-alloy pipe, iron, copper, zinc are higher, with the environment of contact with sea water under, very easily produce pitting attack, make that the sea water corrosion resistant of this aluminium-alloy pipe is lower.Again owing to contain chromium in the raw material of this aluminium-alloy pipe; Though utilize chromium can make magnesium in the duraluminum precipitate evenly, improve the anti-face corrosive nature of aluminium-alloy pipe mutually; But meeting formation intermetallic compound is separated out at intergranular between chromium element and ferro element, thereby has reduced the anti intercrystalline corrosion performance of aluminium-alloy pipe.Secondly, because the content of magnesium elements is higher in the raw material of this aluminium-alloy pipe, though the content height of magnesium elements can make the intensity of aluminium-alloy pipe increase, can reduce its cold deformation processing characteristics, and this duraluminum is prone to separate out the second phase β (Mg along crystal boundary, subgrain boundary
2Al
3).And the relative aluminum substrate of β is an anode, can preferentially corrode, and makes duraluminum have very big intergranular corrosion susceptibility and Sensitivity of Stress Corrosion.This shows that the sea water corrosion resistant of above-mentioned aluminium-alloy pipe under the contact with sea water environment is relatively poor, work-ing life is short.
Summary of the invention
The problem that the present invention will solve provides a kind of aluminium alloy capable of resisting corrosion of sea water pipe.This aluminium-alloy pipe, sea water corrosion resistant is good, long service life.
Another problem that the present invention will solve provides a kind of method for preparing the aluminium alloy capable of resisting corrosion of sea water pipe.
For addressing the above problem, take following technical scheme:
Aluminium alloy capable of resisting corrosion of sea water pipe characteristics of the present invention are the raw materials that comprise following parts by weight:
0.4～1.8 part in magnesium; 97.16～99.36 parts in aluminium.
In the said aluminium: the content of silicon less than the content of 0.08 (weight) %, iron less than the content of 0.15 (weight) %, copper less than the content of 0.005 (weight) %, zinc less than 0.005 (weight) %.Said magnesium and aluminium are respectively magnesium ingot and aluminium ingot.
In the said aluminium ingot, the weight content of aluminium >=99.7%.
In the said magnesium ingot, the weight content of magnesium >=99.8%.
The method for preparing anticorrosion aluminium may further comprise the steps successively:
Earlier aluminium ingot being dropped into temperature is in 730 ℃～750 ℃ the smelting furnace, makes it be fused into melt;
Add magnesium ingot again, stirred 10 minutes～15 minutes;
Afterwards, the melt temperature in the smelting furnace is risen to 740 ℃～760 ℃.Meanwhile,, and stirred 5～10 minutes, melt is carried out the stove endomorphism handle according to the ratio adding Al rare earth alloy of 0.3 kilogram～0.8 kilogram Al rare earth alloy/ton melt;
Afterwards, be the melt spray refining powder of carrier in smelting furnace with the argon gas, remove hydrogen and aluminum oxide impurity in the melt.Refining powder wherein be Yongan, Jiangxi Province extraordinary metallurgical material ltd produce dust 4
#The agent of dusting;
Afterwards, melt in the stove is put into chute, and when putting into chute, according to 1.2～1.6 meters/minute speed, the adding diameter is 9～9.5 millimeters a aluminium titanium boron wire, and melt is carried out thinning processing.In the said aluminium titanium boron wire: the content of titanium is 4.5～5.5 (weight) %, and the content of boron is 0.8～1.3 (weight) %, and the content of aluminium is 93.2～94.3 (weight) %;
Afterwards, will pass through the melt of thinning processing and put into online degasification tank, and, further remove hydrogen and aluminum oxide impurity in the melt, carry out online argon gas refining the melt blowing argon gas in the degasification tank;
Afterwards, with 40 orders and 60 purpose ceramic filter plates the online argon gas purified melt of process is carried out the twin-stage ceramic filter successively, melt is carried out purifying treatment;
Afterwards, will pass through the melt casting that thinning processing crosses and become aluminium alloy bars;
Afterwards, it is in 475 ℃～500 ℃ the homogeneous stove that aluminium alloy bars is placed temperature, and after constant temperature under this temperature keeps 240 minutes～260 minutes, makes it be cooled to room temperature, and aluminium alloy bars is carried out homogenization treatment;
The aluminium alloy bars that afterwards, will pass through homogenization treatment is squeezed into pipe;
Afterwards, the pipe cold-drawn is become aluminium-alloy pipe;
At last, aluminium-alloy pipe is heated to 160 ℃～180 ℃, and constant temperature kept 120 minutes～180 minutes under this temperature, obtained the aluminium alloy capable of resisting corrosion of sea water pipe.
Take such scheme, have the following advantages:
Can find out by such scheme; Compare with the raw material of aluminium-alloy pipe in the background technology; Owing to greatly reduce the parts by weight ratio of silicon, iron, copper, zinc; Make aluminium-alloy pipe of the present invention with the environment of contact with sea water under, be difficult for producing pitting attack, thereby improved the sea water corrosion resistant of aluminium-alloy pipe of the present invention.Owing to do not contain the chromium element in the raw material of aluminium alloy capable of resisting corrosion of sea water pipe of the present invention, avoided intermetallic compound to separate out the generation of phenomenon, thereby improved the anti intercrystalline corrosion performance of aluminium-alloy pipe again at intergranular.Secondly,, reduce the content of magnesium elements in the raw material, not only can improve the cold deformation processing characteristics of aluminium-alloy pipe owing to compare with the raw material of aluminium-alloy pipe in the background technology, can also make magnesium in aluminum substrate with single α (Mg
2Al
3) exist mutually, avoided the second phase β (Mg
2Al
3) separate out, reduced the intergranular corrosion susceptibility and the Sensitivity of Stress Corrosion of duraluminum.This shows that the sea water corrosion resistant of aluminium-alloy pipe of the present invention under the contact with sea water environment is good, long service life.
Embodiment
Embodiment one
Choose the raw material of following parts by weight earlier:
0.6 part of magnesium ingot, 98.5 parts of aluminium ingots.In the said aluminium ingot: the content of silicon is that the content of 0.075 (weight) %, iron is that the content of 0.14 (weight) %, copper is that the content of 0.004 (weight) %, zinc is 0.0035 (weight) %.In the said magnesium ingot, the weight content of magnesium >=99.8%.
Then, it is in 730 ℃ the smelting furnace that aluminium ingot is dropped into temperature, makes it be fused into melt.
Add magnesium ingot again, stirred 10 minutes minutes.
Afterwards, the melt temperature in the smelting furnace is risen to 740 ℃.Meanwhile,, and stirred 5 minutes, melt is carried out the stove endomorphism handle according to the ratio adding Al rare earth alloy of 0.3 kilogram Al rare earth alloy/ton melt.
Afterwards, be the melt spray refining powder of carrier in smelting furnace with the argon gas, remove hydrogen and aluminum oxide impurity in the melt; Refining powder wherein be Yongan, Jiangxi Province extraordinary metallurgical material ltd produce dust 4
#The agent of dusting.
Afterwards, melt in the stove is put into chute, and when putting into chute, according to 1.2 meters/minute speed, the adding diameter is 9 millimeters a aluminium titanium boron wire, and melt is carried out thinning processing.In the said aluminium titanium boron wire: the content of titanium is 4.5 (weight) %, and the content of boron is 0.8 (weight) %, and the content of aluminium is 94.7 (weight) %.
Afterwards, will pass through the melt of thinning processing and put into online degasification tank, and, further remove hydrogen and aluminum oxide impurity in the melt, carry out online argon gas refining the melt blowing argon gas in the degasification tank.
Afterwards, with 40 orders and 60 purpose ceramic filter plates the online argon gas purified melt of process is carried out the twin-stage ceramic filter successively, melt is carried out purifying treatment.
Afterwards, will pass through the melt casting that thinning processing crosses and become aluminium alloy bars.
Afterwards, it is in 475 ℃ the homogeneous stove that aluminium alloy bars is placed temperature, and after constant temperature under this temperature keeps 240 minutes, makes it naturally cool to room temperature, and aluminium alloy bars is carried out homogenization treatment.
The aluminium alloy bars that afterwards, will pass through homogenization treatment with extrusion machine is squeezed into pipe.
Afterwards, with drawbench the pipe cold-drawn is become aluminium-alloy pipe.
At last, aluminium-alloy pipe is placed in the aging oven and is heated to 160 ℃, and constant temperature kept 120 minutes under this temperature, obtained the aluminium alloy capable of resisting corrosion of sea water pipe.
Embodiment two
Choose the raw material of following parts by weight earlier:
1.2 parts of magnesium ingots, 97.9 parts of aluminium ingots.In the said aluminium ingot: the content of silicon is that the content of 0.06 (weight) %, iron is that the content of 0.12 (weight) %, copper is that the content of 0.0035 (weight) %, zinc is 0.004 (weight) %.In the said magnesium ingot, the weight content of magnesium >=99.8%.
Then, it is in 741 ℃ the smelting furnace that aluminium ingot is dropped into temperature, makes it be fused into melt.
Add magnesium ingot again, stirred 12 minutes minutes.
Afterwards, the melt temperature in the smelting furnace is risen to 746 ℃.Meanwhile,, and stirred 8 minutes, melt is carried out the stove endomorphism handle according to the ratio adding Al rare earth alloy of 0.5 kilogram Al rare earth alloy/ton melt.
Afterwards, be the melt spray refining powder of carrier in smelting furnace with the argon gas, remove hydrogen and aluminum oxide impurity in the melt.Refining powder wherein be Yongan, Jiangxi Province extraordinary metallurgical material ltd produce dust 4
#The agent of dusting.
Afterwards, melt in the stove is put into chute, and when putting into chute, according to 1.4 meters/minute speed, the adding diameter is 9.3 millimeters a aluminium titanium boron wire, and melt is carried out thinning processing.In the said aluminium titanium boron wire: the content of titanium is 4.9 (weight) %, and the content of boron is 1.1 (weight) %, and the content of aluminium is 94 (weight) %.
Afterwards, will pass through the melt of thinning processing and put into online degasification tank, and, further remove hydrogen and aluminum oxide impurity in the melt, carry out online argon gas refining the melt blowing argon gas in the degasification tank.
Afterwards, with 40 orders and 60 purpose ceramic filter plates the online argon gas purified melt of process is carried out the twin-stage ceramic filter successively, melt is carried out purifying treatment.
Afterwards, will pass through the melt casting that thinning processing crosses and become aluminium alloy bars.
Afterwards, it is in 490 ℃ the homogeneous stove that aluminium alloy bars is placed temperature, and after constant temperature under this temperature keeps 250 minutes, makes it naturally cool to room temperature, and aluminium alloy bars is carried out homogenization treatment.
The aluminium alloy bars that afterwards, will pass through homogenization treatment with extrusion machine is squeezed into pipe.
Afterwards, with drawbench the pipe cold-drawn is become aluminium-alloy pipe.
At last, aluminium-alloy pipe is placed in the aging oven and is heated to 172 ℃, and constant temperature kept 140 minutes under this temperature, obtained the aluminium alloy capable of resisting corrosion of sea water pipe.
Embodiment three
Choose the raw material of following parts by weight earlier:
1.8 parts of magnesium ingots, 99.2 parts of aluminium ingots.In the said aluminium ingot: the content of silicon is that the content of 0.045 (weight) %, iron is that the content of 0.11 (weight) %, copper is that the content of 0.002 (weight) %, zinc is 0.003 (weight) %.In the said magnesium ingot, the weight content of magnesium >=99.8%.
Then, it is in 750 ℃ the smelting furnace that aluminium ingot is dropped into temperature, makes it be fused into melt.
Add magnesium ingot again, stirred 15 minutes minutes.
Afterwards, the melt temperature in the smelting furnace is risen to 760 ℃.Meanwhile,, and stirred 10 minutes, melt is carried out the stove endomorphism handle according to the ratio adding Al rare earth alloy of 0.8 kilogram Al rare earth alloy/ton melt.
Afterwards, be the melt spray refining powder of carrier in smelting furnace with the argon gas, remove hydrogen and aluminum oxide impurity in the melt.Refining powder wherein be Yongan, Jiangxi Province extraordinary metallurgical material ltd produce dust 4
#The agent of dusting.
Afterwards, melt in the stove is put into chute, and when putting into chute, according to 1.6 meters/minute speed, the adding diameter is 9.5 millimeters a aluminium titanium boron wire, and melt is carried out thinning processing.In the said aluminium titanium boron wire: the content of titanium is 5.5 (weight) %, and the content of boron is 1.3 (weight) %, and the content of aluminium is 93.2 (weight) %.
Afterwards, will pass through the melt of thinning processing and put into online degasification tank, and, further remove hydrogen and aluminum oxide impurity in the melt, carry out online argon gas refining the melt blowing argon gas in the degasification tank.
Afterwards, with 40 orders and 60 purpose ceramic filter plates the online argon gas purified melt of process is carried out the twin-stage ceramic filter successively, melt is carried out purifying treatment.
Afterwards, will pass through the melt casting that thinning processing crosses and become aluminium alloy bars.
Afterwards, it is in 500 ℃ the homogeneous stove that aluminium alloy bars is placed temperature, and after constant temperature under this temperature keeps 260 minutes, makes it naturally cool to room temperature, and aluminium alloy bars is carried out homogenization treatment.
The aluminium alloy bars that afterwards, will pass through homogenization treatment with extrusion machine is squeezed into pipe.
Afterwards, with drawbench the pipe cold-drawn is become aluminium-alloy pipe.
At last, aluminium-alloy pipe is placed in the aging oven and is heated to 180 ℃, and constant temperature kept 180 minutes under this temperature, obtained the aluminium alloy capable of resisting corrosion of sea water pipe.
Claims (5)
1. aluminium alloy capable of resisting corrosion of sea water pipe is characterized in that comprising the raw material of following parts by weight:
0.4～1.8 part in magnesium;
97.16～99.36 parts in aluminium;
In the said aluminium: the content of silicon less than the content of 0.08 (weight) %, iron less than the content of 0.15 (weight) %, copper less than the content of 0.005 (weight) %, zinc less than 0.005 (weight) %;
Said magnesium and aluminium are respectively magnesium ingot and aluminium ingot.
2. aluminium alloy capable of resisting corrosion of sea water pipe according to claim 1 is characterized in that in the said aluminium ingot weight content of aluminium >=99.7%.
3. aluminium alloy capable of resisting corrosion of sea water pipe according to claim 1 is characterized in that in the said magnesium ingot weight content of magnesium >=99.8%.
4. the method for preparing the said anticorrosion aluminium of claim 1 is characterized in that may further comprise the steps successively:
Earlier aluminium ingot being dropped into temperature is in 730 ℃～750 ℃ the smelting furnace, makes it be fused into melt;
Add magnesium ingot again, stirred 10 minutes～15 minutes;
Afterwards, the melt temperature in the smelting furnace is risen to 740 ℃～760 ℃; Meanwhile,, and stirred 5～10 minutes, melt is carried out the stove endomorphism handle according to the ratio adding Al rare earth alloy of 0.3 kilogram～0.8 kilogram Al rare earth alloy/ton melt;
Afterwards, be the melt spray refining powder of carrier in smelting furnace with the argon gas, remove hydrogen and aluminum oxide impurity in the melt; Refining powder wherein be Yongan, Jiangxi Province extraordinary metallurgical material ltd produce dust 4
#The agent of dusting.
Afterwards, melt in the stove is put into chute, and when putting into chute, according to 1.2～1.6 meters/minute speed, the adding diameter is 9～9.5 millimeters a aluminium titanium boron wire, and melt is carried out thinning processing; In the said aluminium titanium boron wire: the content of titanium is 4.5～5.5 (weight) %, and the content of boron is 0.8～1.3 (weight) %, and the content of aluminium is 93.2～94.3 (weight) %;
Afterwards, will pass through the melt of thinning processing and put into online degasification tank, and, further remove hydrogen and aluminum oxide impurity in the melt, carry out online argon gas refining the melt blowing argon gas in the degasification tank;
Afterwards, with 40 orders and 60 purpose ceramic filter plates the online argon gas purified melt of process is carried out the twin-stage ceramic filter successively, melt is carried out purifying treatment;
Afterwards, will pass through the melt casting that thinning processing crosses and become aluminium alloy bars;
Afterwards, it is in 475 ℃～500 ℃ the homogeneous stove that aluminium alloy bars is placed temperature, and after constant temperature under this temperature keeps 240 minutes～260 minutes, makes it be cooled to room temperature, and aluminium alloy bars is carried out homogenization treatment;
The aluminium alloy bars that afterwards, will pass through homogenization treatment is squeezed into pipe;
Afterwards, the pipe cold-drawn is become aluminium-alloy pipe;
At last, aluminium-alloy pipe is heated to 160 ℃～180 ℃, and constant temperature kept 120 minutes～180 minutes under this temperature, obtained the aluminium alloy capable of resisting corrosion of sea water pipe.
5. method according to claim 4 is characterized in that the purity >=99.99 weight % of said argon gas.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016159361A1 (en) * | 2015-04-03 | 2016-10-06 | 株式会社Uacj | Aluminum alloy pipe with superior corrosion resistance and processability, and method for manufacturing same |
| CN106119630A (en) * | 2016-08-30 | 2016-11-16 | 江苏亚太安信达铝业有限公司 | A kind of aluminium alloy for seawater corrosion resistance tubing and preparation method thereof |
| CN107354326A (en) * | 2017-07-11 | 2017-11-17 | 亚太轻合金(南通)科技有限公司 | The preparation method of aluminium-alloy pipe |
| CN107937769A (en) * | 2017-12-13 | 2018-04-20 | 无锡海特铝业有限公司 | A kind of aluminium alloy with high intensity seawater corrosion resistance and preparation method thereof |
| CN110578079A (en) * | 2019-09-18 | 2019-12-17 | 新疆众和股份有限公司 | Acid corrosion resistant aluminum alloy pipe and method for manufacturing same |
| CN114457262A (en) * | 2022-01-05 | 2022-05-10 | 无锡金洋铝业有限公司 | Seawater corrosion resistant aluminum alloy material |
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| CN1900336A (en) * | 2006-07-27 | 2007-01-24 | 中山市金胜铝业有限公司 | Aluminum alloy pipe for high purity and high precision light sensitive drum base material and producing method |
| CN101100717A (en) * | 2007-07-28 | 2008-01-09 | 周福海 | High strength aluminum-magnesium-silicon alloy with excellent forgeability and producing method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1900336A (en) * | 2006-07-27 | 2007-01-24 | 中山市金胜铝业有限公司 | Aluminum alloy pipe for high purity and high precision light sensitive drum base material and producing method |
| CN101100717A (en) * | 2007-07-28 | 2008-01-09 | 周福海 | High strength aluminum-magnesium-silicon alloy with excellent forgeability and producing method thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016159361A1 (en) * | 2015-04-03 | 2016-10-06 | 株式会社Uacj | Aluminum alloy pipe with superior corrosion resistance and processability, and method for manufacturing same |
| CN107429337A (en) * | 2015-04-03 | 2017-12-01 | 株式会社Uacj | The aluminium-alloy pipe and its manufacture method of corrosion resistance and excellent in workability |
| JPWO2016159361A1 (en) * | 2015-04-03 | 2018-03-01 | 株式会社Uacj | Aluminum alloy tube excellent in corrosion resistance and workability and method for producing the same |
| EP3279349A4 (en) * | 2015-04-03 | 2018-10-31 | UACJ Corporation | Aluminum alloy pipe with superior corrosion resistance and processability, and method for manufacturing same |
| CN107429337B (en) * | 2015-04-03 | 2019-06-07 | 株式会社Uacj | The aluminium-alloy pipe and its manufacturing method of corrosion resistance and excellent in workability |
| US10889881B2 (en) | 2015-04-03 | 2021-01-12 | Uacj Corporation | Aluminum alloy pipe with superior corrosion resistance and processability, and method for manufacturing same |
| CN106119630A (en) * | 2016-08-30 | 2016-11-16 | 江苏亚太安信达铝业有限公司 | A kind of aluminium alloy for seawater corrosion resistance tubing and preparation method thereof |
| CN106119630B (en) * | 2016-08-30 | 2018-07-03 | 江苏亚太安信达铝业有限公司 | It is a kind of for aluminium alloy of seawater corrosion resistance tubing and preparation method thereof |
| CN107354326A (en) * | 2017-07-11 | 2017-11-17 | 亚太轻合金(南通)科技有限公司 | The preparation method of aluminium-alloy pipe |
| CN107937769A (en) * | 2017-12-13 | 2018-04-20 | 无锡海特铝业有限公司 | A kind of aluminium alloy with high intensity seawater corrosion resistance and preparation method thereof |
| CN110578079A (en) * | 2019-09-18 | 2019-12-17 | 新疆众和股份有限公司 | Acid corrosion resistant aluminum alloy pipe and method for manufacturing same |
| CN114457262A (en) * | 2022-01-05 | 2022-05-10 | 无锡金洋铝业有限公司 | Seawater corrosion resistant aluminum alloy material |
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Effective date of registration: 20220804 Address after: No. 58, Lihe East Road, Xinwu District, Wuxi, Jiangsu 214111 Patentee after: JIANGSU ASIA-PACIFIC LIGHT ALLOY TECHNOLOGY Co.,Ltd. Address before: 214121, 72 Xin Zhou Dong Road, Binhu District, Jiangsu, Wuxi Patentee before: WUXI HATAL ALUMINIUM Co.,Ltd. |