CN100516309C - Long life ferroalloy sacrificial anode - Google Patents
Long life ferroalloy sacrificial anode Download PDFInfo
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- CN100516309C CN100516309C CNB2007100151514A CN200710015151A CN100516309C CN 100516309 C CN100516309 C CN 100516309C CN B2007100151514 A CNB2007100151514 A CN B2007100151514A CN 200710015151 A CN200710015151 A CN 200710015151A CN 100516309 C CN100516309 C CN 100516309C
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Abstract
An effective durable anodic sacrifice assembly of Fe alloy for sea water corrosion, especially for protection of copper alloy pipelines on ships or other apparatus, consists of anodic casings, tubular anodes, flanges, nuts, and pipelines. The assembly has sectional structure. The tubular anodes with diameters of (0.9-1.2) times of those of the sea water pipelines to be protected are embedded in the anodic casings with flanges at their both ends to connect with pipelines and sealed. The lengths of the said casings and anodes are regular and they comprises Mn, Cr, Al, and balanced with Fe. The heavier of the anodes, the longer of their working service life, so that they are usable for sea water pipelines that must work over a dock maintenance period.
Description
Technical field:
The present invention relates to the protection against corrosion ferroalloy sacrificial anode of high-efficiency long-life under a kind of briny environment, the particularly a kind of boats and ships in the briny environment and long life ferroalloy sacrificial anode of other equipment protection copper alloy seawaterline of being suitable for.
Background technology:
The seawater pipe of boats and ships in use etching problem occurs through regular meeting, even produces corrosion leakage.Early stage frequent leakage of seawaterline not only caused the serious reduction of marine technology performance, and increased the maintenance cost of boats and ships greatly, influences its normal navigation.Adopting the better tubing of sea water corrosion resistant is one of approach of dealing with problems, but material price costlinesses such as titanium alloy, duplex stainless steel, and easily the other materials in the piping system is brought the galvanic corrosion problem.The red copper pipeline is used on boats and ships often at present, and is relatively economical, but its solidity to corrosion still can not satisfy actual requirement fully, need take some supporting safeguard procedures, the corrosion damaging problem of comprehensive regulation seawaterline.
In the past, the boats and ships copper seawater pipe line extensively adopted the sacrificial zinc alloy anode protection, but mostly not very successful.Major cause is not that sacrificial protection is invalid; but because the seawaterline latus rectum is less; the sacrificial anode size that can install on the pipeline is limited; potential difference excessive (about 800mV) between zinc alloy anode and the copper alloy negative electrode in addition; the sacrificial anode dissolving is too fast, and the life-span is too short, mostly is completely consumed in the several months; boats and ships were difficult for again often changing between the voyage schedule, and the anode base of zinc plug formula and plug material are the H59-1 brass that dealloying susceptibility is arranged in addition.Therefore seawaterline only is protected in the several months behind the dress anode, is in the unprotect state later on for a long time, even plug corrosion back pressurized took place collapses and the accident that causes electrical equipment to catch fire.
At present, Russia, the U.S., Japan and other countries are all recommending to use iron anode aspect the copper seawater pipe line sacrificial protection of boats and ships, and do not recommend sacrificial zinc alloy anode.But the iron anode that it adopts, the material that has is directly selected plain carbon stool or pure iron for use, although can provide protection to the copper pipe road, its performance as sacrificial anode material is not best.On the basis as the impurity such as Fe of sacrificial aluminium alloy anode in strictness control aluminium; adding suitable alloying element makes the chemical property of aluminium alloy sacrificial anode material reach service requirements; the iron alloy anode must be controlled foreign matter content and add suitable alloying element according to the characteristics of pipeline protection, makes its solidity to corrosion, operating potential, electrical capacity and current efficiency, solubility property etc. reach the requirement of sacrificial anode material.
Except anode material, anodic structure formation also is the key factor that influences seawaterline protection effect.Chinese patent (CN03253305.5) " a kind of seawaterline sacrificial anode protection device " has been introduced a kind of seawaterline sacrificial anode protection device.It is characterized in that described sacrificial anode is the pipe shape, its outside suit one hollow cylindrical shell is clipped in two flange center fixed.Its advantage is: simple in structure, it is convenient to install, change.But because the size of anode bodies is less, there is short problem of life-span equally, be difficult to reach a depressed place and repair the phase, and the pressure-resistant seal aspect of this device is still waiting further raising.
Summary of the invention:
The objective of the invention is to overcome the deficiencies in the prior art, provide that a kind of open circuit potential is suitable, current efficiency is high, dissolving evenly and reach the ferroalloy sacrificial anode assembly that the phase is repaiied in a depressed place work-ing life at least, this assembly does not need the complex technology operation just replacing can be installed, and can overcome prior art short, the not withstand voltage shortcoming of structure in work-ing life.
To achieve these goals, the present invention starts with from the improvement in performance of sacrificial anode material itself earlier, designed the ferroalloy sacrificial anode material that a kind of potential difference is suitable, dissolving is even and current efficiency is high and made anode assemblies, its anode assemblies agent structure comprises anode outer tube, tubular anode body, flange, bolt and pipeline; Adopt the pipeline section type structure, the material of anode outer tube is identical with the seawaterline material, and the anode assemblies two ends are connected to flange, adopts flange form to be connected between anode and the pipeline and seals; The tubular anode body is embedded in the anode outer tube, and its internal diameter is 0.9～1.2 times of protected seawaterline internal diameter; The adjustable length of anode outer tube and tubular anode body.
The present invention has determined with Mn, Cr and trace of Al to be the ferroalloy sacrificial anode material composition of alloying element by the research of corrosion and chemical property, and the weight percent of its each element is: Mn is 1～6%; Cr is 1～5%; Al is 0.1～0.5%; The rest is Fe; The adding of alloying element has raising anodic chemical property, improves the antiscour corrosive of anode ability own, prolongs the anodic effect in work-ing life; Adopt conventional casting technology, control composition of raw material, melting and come out of the stove, pouring temperature and composition uniformity coefficient, make the grain structure refinement, make the ferroalloy sacrificial anode assembly.
The present invention is according to the constructional feature of boats and ships seawaterline, anode bodies is designed to pipeline section type composite anode structure, these anode construction two ends are shaped on one section bimetal tube of flange, internal layer is a sacrificial anode material, skin is and seawaterline or flange identical materials, directly links to each other with the flange of seawaterline by flange.
Anode construction of the present invention can significantly increase anode weight, significantly increases anode work-ing life, can be used for being difficult to maintain, and the claimed time limit must meet or exceed a depressed place and repair on the seawaterline of phase.
Description of drawings:
Fig. 1 is a composition structural principle synoptic diagram of the present invention.
Embodiment:
Enforcement structure of the present invention mainly is made up of anode outer tube 1, tubular anode body 2, flange 3, bolt 4 and pipeline 5; Anode outer tube 1 is identical with protected seawaterline material, and tubular anode body 2 is the high-performance ferroalloy sacrificial anode, according to the difference of object of protection, can change its component concentration.And for guaranteeing the pressure-resistant seal performance of structure, its two sides can be shaped on potted line; Flange 3 is identical with anode outer tube 1 material, is similarly the pressure-resistant seal performance that guarantees structure, and two sides can be shaped on potted line, are connected with protected pipeline flange 3 by bolt 4; The length of anode bodies can be adjusted according to the requirement of life or the size of actual seawaterline arrangement space; Bolt 4 and pipeline 5 are respectively conventional components and copper alloy seawaterline.
Embodiment:
This enforcement is example with protection red copper seawaterline, and the material of choosing anode outer tube 1 is a red copper, and the material composition weight percent of sacrificing tubular anode body 2 is: Mn, 1～6%; Cr, 1～5%; Al, 0.1～0.5% iron alloy anode (iron level is 88～98%), the performance index of this anode bodies material are: proportion: 7.84g/cm3; Open circuit potential :-0.68～-0.72V (SCE); Operating potential :-0.61～-0.59V (SCE); Actual capacitance＞920A.h/Kg; Current efficiency＞95%; Anode dissolution is even.The length L of this anode bodies structure is determined according to the requirement of life or the requirements of installation space of concrete seawaterline.The internal diameter of sacrificing tubular anode body 2 is identical with the internal diameter of protected pipeline 5, is connected with the seawaterline flange by flange during installation, and insulation and sealing are drawn lead by anode outer tube 1 then and be connected with protected pipeline 5 between the flange; During replacing, only need bolt 4 is dismantled, sacrifice tubular anode body 2 replacings of making are in advance got final product.
The specification of ferroalloy sacrificial anode body of the invention process: φ 55*10*20mm (external diameter * wall thickness * length); TUP manages specification: φ 60*5*500mm (external diameter * wall thickness * length); ferroalloy sacrificial anode is to the galvanic protection effect of red copper pipeline under the hydrostatic state; 87 days (connection) time of test; test finishes; sample is weighed after removing the corrosion product drying by standard method; weightless result and protection degree are shown in Table 1, and compare with the corrosion speed of the red copper sample that does not carry out sacrificial protection, and ferroalloy sacrificial anode can be up to 92.4% to the protection degree of copper tube.
Weightless and the protection degree of table 1. copper tube
| Project | Fe1# | TUP-Fe1# |
| Weightless (g) | 2.91 | 0.866 |
| Corrosion rate (mm/a) | 0.373 | 0.0052 |
| Spontaneous corrosion rate (mm/a) | TUP | 0.068 |
| The protection degree | 92.4％ |
Claims (2)
1. long life ferroalloy sacrificial anode, agent structure comprises anode outer tube, tubular anode body, flange, bolt and pipeline, it is characterized in that adopting the pipeline section type structure, the material of anode outer tube is identical with the seawaterline material, the anode assemblies two ends are connected to flange, adopt flange form to be connected between anode and the pipeline and seal; The tubular anode body is embedded in the anode outer tube, and its internal diameter is 0.9～1.2 times of protected seawaterline internal diameter; The adjustable length of anode outer tube and tubular anode body.
2. long life ferroalloy sacrificial anode according to claim 1 is characterized in that with Mn, Cr and trace of Al being the ferroalloy sacrificial anode material composition of alloying element, and the weight percent of its each element is: Mn is 1～6%; Cr is 1～5%; Al is 0.1～0.5%; The rest is Fe; Adopt casting technology, control composition of raw material, melting and come out of the stove, pouring temperature and composition uniformity coefficient, make the grain structure refinement, make the ferroalloy sacrificial anode assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100151514A CN100516309C (en) | 2007-07-18 | 2007-07-18 | Long life ferroalloy sacrificial anode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100151514A CN100516309C (en) | 2007-07-18 | 2007-07-18 | Long life ferroalloy sacrificial anode |
Publications (2)
| Publication Number | Publication Date |
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| CN101100751A CN101100751A (en) | 2008-01-09 |
| CN100516309C true CN100516309C (en) | 2009-07-22 |
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| CNB2007100151514A Active CN100516309C (en) | 2007-07-18 | 2007-07-18 | Long life ferroalloy sacrificial anode |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602993A (en) * | 2013-11-26 | 2014-02-26 | 中国人民解放军92537部队 | Protective spacer bush of iron alloy sacrificial anode for seawater pipeline |
| CN104694936A (en) * | 2014-12-15 | 2015-06-10 | 上海交通大学 | Iron-based sacrificial anode for protecting non-magnetic stainless steel and stainless steel drill collar |
| CN104532259B (en) * | 2014-12-26 | 2017-10-20 | 青岛双瑞海洋环境工程股份有限公司 | The composite electrochemical device protected for condenser pipe series cathode |
| CN104651852A (en) * | 2015-01-29 | 2015-05-27 | 沪东中华造船(集团)有限公司 | Seawater pipeline sacrificial anode protector and mounting method thereof |
| CN104911605A (en) * | 2015-06-26 | 2015-09-16 | 太阳鸟游艇股份有限公司 | Anticorrosion device for pipelines of yacht |
| CN106222567B (en) * | 2016-10-24 | 2018-08-28 | 青岛双瑞海洋环境工程股份有限公司 | Electrolysis copper-iron alloy composite anode materials, electrode assembly and electrolysis unit |
| CN107740908A (en) * | 2017-11-16 | 2018-02-27 | 广新海事重工股份有限公司 | A kind of cupro-nickel pipe anti-corrosive apparatus |
| CN108004553A (en) * | 2017-12-20 | 2018-05-08 | 沪东中华造船(集团)有限公司 | Detachable pipeline erosion protection system and its replacing options for seawaterline |
| CN108823571B (en) * | 2018-01-24 | 2020-06-23 | 中国船舶重工集团公司第七二五研究所 | Intelligent seawater pipeline sacrificial anode structure with critical alarm function and corrosion state in-situ monitoring method thereof |
| CN110173604A (en) * | 2019-06-12 | 2019-08-27 | 中国船舶重工集团公司第七二五研究所 | The method for preventing crevice corrosion between two phase stainless steel flange head |
| CN111826660A (en) * | 2020-08-31 | 2020-10-27 | 大连科迈尔防腐科技有限公司 | Sacrificial anode structure of tensioning formula installation |
| CN113913831A (en) * | 2021-10-18 | 2022-01-11 | 江南造船(集团)有限责任公司 | Seawater pipeline corrosion prevention device and using method |
| CN114591756A (en) * | 2022-04-11 | 2022-06-07 | 长江三星能源科技股份有限公司 | Electric dehydration and desalination equipment with degassing tank and easy to maintain corrosion resistance |
-
2007
- 2007-07-18 CN CNB2007100151514A patent/CN100516309C/en active Active
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| 新型海水管系材料HDR双相不锈钢的腐蚀和电化学性能. 王洪仁，姚萍，刘玉梅，王曰义，王虹斌.腐蚀与防护，第22卷第1期. 2001 |
| 新型海水管系材料HDR双相不锈钢的腐蚀和电化学性能. 王洪仁，姚萍，刘玉梅，王曰义，王虹斌.腐蚀与防护，第22卷第1期. 2001 * |
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| 铁合金牺牲阳极在铜及其合金海水管路中的应用. 黄佳典，郭伟，刘波，王茂生.中国修船，第4期. 2002 * |
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| CN101100751A (en) | 2008-01-09 |
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Assignee: Sunrui Marine Environment Engineering Company Assignor: No.725 Inst. China Shipping Heavy Industry Group Corp. Contract record no.: 2011370000199 Denomination of invention: Long life ferroalloy sacrificial anode Granted publication date: 20090722 License type: Exclusive License Open date: 20080109 Record date: 20110512 |
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Change date: 20120725 Contract record no.: 2011370000199 Assignee after: Qingdao Sunrui Marine Environment Engineering Co., Ltd. Assignee before: Sunrui Marine Environment Engineering Company |