CN101619459B - Sacrificial anode capable of quickly activating aluminum alloy - Google Patents
Sacrificial anode capable of quickly activating aluminum alloy Download PDFInfo
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- CN101619459B CN101619459B CN2009100175908A CN200910017590A CN101619459B CN 101619459 B CN101619459 B CN 101619459B CN 2009100175908 A CN2009100175908 A CN 2009100175908A CN 200910017590 A CN200910017590 A CN 200910017590A CN 101619459 B CN101619459 B CN 101619459B
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Abstract
A sacrificial anode capable of quickly activating aluminum alloy comprises the following components: 3.5-7.5wt% of Zn, 0.7-2wt% of Mg, 0.04-0.10wt% of Mn, 0.015-0.050wt% of In, 0.01-0.06wt% of Ga, 0.10wt% or less of Si, 0.15wt% or less of Fe, 0.01wt% or less of Cu and the balance aluminum. The invention has the advantage that Ga, Mg, Mn and other elements are added in the aluminum alloy for the refining of the aluminum alloy sacrificial anode, and the aluminum alloy sacrificial anode primary battery can be activated fast to release continuous heavy current, thus protecting the corroded steel structures in alternate and complete immersion environment. The sacrificial anode is applicable to all the cathodic protection of steel structures in alternate and complete immersion environment.
Description
Technical field
The present invention relates to a kind of sacrificial aluminium alloy anode.
Background technology
The ocean is very harsh corrosive environment, and the corrosion and protection problem is offshore structures such as boats and ships, ocean platform, port and pier, bridge spanning the sea, cross the important topic that extra large pipeline etc. faces.Galvanic protection (cathodic protection) is an ocean rot-resistant important means, and particularly in the internal protection of works (as the ballast for cruising water tank etc.) is because security reason can only use galvanic anode protection.
In the past, sacrificial zinc alloy anode is mainly adopted in galvanic protection, but since its than great, electrical capacity is little, and in the environment of alternation of wetting and drying easily crust lost efficacy, greatly reduce the effect of galvanic protection.By contrast, sacrificial aluminium alloy anode is in light weight, electrical capacity is high, the life-span is long, and expense is low when reaching identical protection effect, and therefore, replacing zinc anode with sacrificial aluminium alloy anode is trend of the times.At present, sacrificial aluminium alloy anode has obtained application in ocean environment anticorrosion, and the chemical property that improves constantly sacrificial aluminium alloy anode becomes the target that corrosion engineering Shi Zizi pursues.The main chemical property index of sacrificial anode comprises: anodic open circuit potential, operating potential, electrical capacity, current efficiency and surface dissolution situation.The major objective of sacrificial anode material development at present is the anode that open circuit potential and operating potential are suitable, surface dissolution is even, electrical capacity is big, current efficiency is high.
The position that has in the marine structure is intermittent immersion, soaks the position between promptly, and the sacrificial anode that is used for these positions can fast activating when also requiring immersion except that above-mentioned requirements, makes the current potential of protected body reach protection potential rapidly, thereby improves the protection effect.And present sacrificial zinc alloy anode is soaking in the environment easily crust of surface, and chemical property descends rapidly, the protection poor effect, thereby soak environment between not being suitable for; Traditional sacrificial aluminium alloy anode (seeing GB4948-2002) descends very greatly soaking in the environment electrical capacity, generally is no more than 2200Ah/kg, and soak time is longer, generally needs more than 10 minutes, makes that the effect of galvanic protection is undesirable.
Therefore, be starved of in the practical application a kind of can fast activating, and soaking and soaking the sacrificial anode material that all has higher capacity and current efficiency in the environment entirely.
Summary of the invention
Technical problem to be solved by this invention provides a kind of sacrificial anode capable of quickly activating aluminum alloy, is applicable to all, soaks steel construction galvanic protection in the environment entirely, can fast activating discharge to continue big electric current.
A kind of sacrificial anode capable of quickly activating aluminum alloy of the present invention, it is characterized in that with aluminium being raw material, add following element, it consists of according to weight percent: zinc: 3.5-7.5wt%, magnesium: 0.7-2wt%, manganese: 0.04-0.10wt%, indium: 0.015-0.050wt%, gallium: 0.01-0.06wt%, silicon≤0.10wt% wherein, iron≤0.15wt%, copper≤0.01wt%, surplus is an aluminium.
The present invention makes the sacrificial aluminium alloy anode grain refining by add alloying element Ga, Mg, Mn etc. in aluminium alloy, makes anode energy fast activating in seawater, and continues to discharge big electric current, the steel construction that protection is corroded.Be applicable to all, soak steel construction galvanic protection in the environment entirely.Can be applied to the anticorrosion of works such as boats and ships, ocean platform, port and pier, bridge spanning the sea, the extra large pipeline of mistake, have wide industrialization prospect.
This sacrificial anode can adopt casting technique traditionally, also can adopt other metallurgical means casting.
Advantage of the present invention:
1, this sacrificial aluminium alloy anode can fast activating in seawater, and soak time is less than 3min.
2, this anode all has higher electrical capacity and current efficiency soaking entirely and soak in the environment: soaking under the ambient conditions actual capacitance 〉=2450Ah/Kg, current efficiency 〉=86%; Soaking under the ambient conditions actual capacitance 〉=2700Ah/Kg, current efficiency 〉=93% entirely.
Embodiment
Embodiment 1:
And cabin, grotto hardware etc. soak the position between being in contact site, sea, the boats and ships, and reductions such as common sacrificial anode electrical capacity, current efficiency, soak time can fast activating in the time of can not keeping soaking.We adopt zinc: 5.5wt%, magnesium: 1.3wt%, manganese: 0.080wt%, indium: 0.035wt%, gallium: 0.045wt%, surplus is material (silicon≤0.10wt% wherein, the iron≤0.15wt% of aluminium, the sacrificial anode that copper≤0.01wt%) is made, soak in the environment anode capacity between being in after testing: 2472Ah/Kg, current efficiency: 87%, soak time 2.5min reaches design requirements fully.Be welded direct to protected works producing anode block; crossing the rust staining of finding the protected object surface in two months is enlargement phenomenon; expose polished bright steel construction surface, adopt the sacrificial aluminium alloy anode of overactivity to make the current potential of protected body reach protection potential rapidly, thereby improve the protection effect.
Embodiment 2:
Adopt sacrificial protection for the steel pipe piling that soaks entirely below the harbour under the environment, we adopt zinc: 4.5wt%, magnesium: 1.1wt%; manganese: 0.060wt%; indium: 0.040wt%, gallium: 0.025wt%, surplus is the material (silicon≤0.10wt% wherein of aluminium; iron≤0.15wt%; copper≤0.01wt%), be in after testing and soak in the environment anode capacity: 2700Ah/Kg entirely; current efficiency: 94.5%, soak time 2min.Observation through nearly half a year is measured, and operating potential is normal, and anode surface comes off evenly, and the no rust staining in protected steel construction surface generates, and saves the anodic consumption simultaneously.
Embodiment 3:
Corrosionproof protection for the petrochemical industry reservoir walls, we adopt zinc: 4.5wt%, magnesium: 1.1wt%, manganese: 0.060wt%, indium: 0.035wt%, gallium: 0.030wt%, surplus is material (silicon≤0.10wt% wherein, the iron≤0.15wt% of aluminium, copper≤0.01wt%), be in after testing and soak entirely in the environment, anode capacity: 2710Ah/Kg, current efficiency: 95%; Soak in the environment anode capacity between being in after testing: 2462Ah/Kg, current efficiency: 87.5%.The sacrificial anode of fast activating well solves reservoir walls and is in entirely, soaks problem of environment.
Claims (3)
1. a sacrificial anode capable of quickly activating aluminum alloy is characterized in that with aluminium being raw material, adds following element, according to weight percent, it consists of: zinc: 5.5wt%, magnesium: 1.3wt%, manganese: 0.080wt%, indium: 0.035wt%, gallium: 0.045wt%, silicon≤0.10wt% wherein, iron≤0.15wt%, copper≤0.01wt%, surplus is an aluminium.
2. a sacrificial anode capable of quickly activating aluminum alloy is characterized in that with aluminium being raw material, adds following element, according to weight percent, it consists of: zinc: 4.5wt%, magnesium: 1.1wt%, manganese: 0.060wt%, indium: 0.040wt%, gallium: 0.025wt%, silicon≤0.10wt% wherein, iron≤0.15wt%, copper≤0.01wt%, surplus is an aluminium.
3. a sacrificial anode capable of quickly activating aluminum alloy is characterized in that with aluminium being raw material, adds following element, according to weight percent, it consists of: zinc: 4.5wt%, magnesium: 1.1wt%, manganese: 0.060wt%, indium: 0.035wt%, gallium: 0.030wt%, silicon≤0.10wt% wherein, iron≤0.15wt%, copper≤0.01wt%, surplus is an aluminium.
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| CN2009100175908A CN101619459B (en) | 2009-08-11 | 2009-08-11 | Sacrificial anode capable of quickly activating aluminum alloy |
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| CN2009100175908A CN101619459B (en) | 2009-08-11 | 2009-08-11 | Sacrificial anode capable of quickly activating aluminum alloy |
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| CN101619459A CN101619459A (en) | 2010-01-06 |
| CN101619459B true CN101619459B (en) | 2011-06-22 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605376B (en) * | 2011-05-27 | 2014-11-12 | 中国石油化工股份有限公司 | Sacrificial anode material |
| CN103088346A (en) * | 2012-12-07 | 2013-05-08 | 山东德瑞防腐材料有限公司 | Aluminum alloy sacrificial anode added with Sn and Mn elements |
| CN103088347B (en) * | 2012-12-27 | 2015-10-21 | 中国石油集团川庆钻探工程有限公司 | Storage tank coil pipe aluminium alloy sacrificial anode material and preparation method thereof |
| CN104498961A (en) * | 2014-12-03 | 2015-04-08 | 中国船舶重工集团公司第七二五研究所 | Integrated anti-corrosion method for water ballast space with complex structure |
| CN104480354B (en) * | 2014-12-25 | 2017-01-18 | 陕西科技大学 | Preparation method of high-strength dissolublealuminum alloy material |
| CN106893908A (en) * | 2015-12-21 | 2017-06-27 | 比亚迪股份有限公司 | A kind of aluminium alloy and preparation method thereof |
| CN105779830B (en) * | 2016-04-06 | 2018-11-02 | 中国兵器科学研究院宁波分院 | A kind of perishable aluminum alloy materials and preparation method thereof |
| DE102016222296A1 (en) * | 2016-11-14 | 2018-05-17 | Siemens Aktiengesellschaft | Multi-layer aluminum-containing protective coating and component |
| CN109609959B (en) * | 2018-12-28 | 2021-03-30 | 青岛双瑞海洋环境工程股份有限公司 | High-performance low-potential aluminum sacrificial anode material applied to ocean engineering cathode protection |
Citations (2)
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| US4885045A (en) * | 1987-06-16 | 1989-12-05 | Comalco Aluminum Limited | Aluminium alloys suitable for sacrificial anodes |
| CN101445935A (en) * | 2008-12-25 | 2009-06-03 | 中国船舶重工集团公司第七二五研究所 | Aluminum alloy sacrificial anode suitable for abyssal environment |
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2009
- 2009-08-11 CN CN2009100175908A patent/CN101619459B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4885045A (en) * | 1987-06-16 | 1989-12-05 | Comalco Aluminum Limited | Aluminium alloys suitable for sacrificial anodes |
| CN101445935A (en) * | 2008-12-25 | 2009-06-03 | 中国船舶重工集团公司第七二五研究所 | Aluminum alloy sacrificial anode suitable for abyssal environment |
Non-Patent Citations (2)
| Title |
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| 侯德龙等.铝基牺牲阳极材料的研究与开发.《稀有金属》.2009,第33卷(第1期),第96-100页. * |
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Denomination of invention: A rapidly activated aluminum alloy sacrificial anode Effective date of registration: 20220318 Granted publication date: 20110622 Pledgee: Agricultural Bank of China Limited by Share Ltd. Yiyuan county subbranch Pledgor: SHANDONG DERUI ANTI-CORROSION MATERIALS Co.,Ltd. Registration number: Y2022980002788 |