CN101638787A - Sacrificial magnesium alloy anode with external resistor - Google Patents
Sacrificial magnesium alloy anode with external resistor Download PDFInfo
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- CN101638787A CN101638787A CN200810140843A CN200810140843A CN101638787A CN 101638787 A CN101638787 A CN 101638787A CN 200810140843 A CN200810140843 A CN 200810140843A CN 200810140843 A CN200810140843 A CN 200810140843A CN 101638787 A CN101638787 A CN 101638787A
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Abstract
The invention provides a sacrificial magnesium alloy anode with an external resistor, which comprises a first screw cap, a magnesium alloy rod and a steel core, wherein a device is arranged between the screw cap and the magnesium alloy rod and comprises a connection column, a resistor and a second screw cap; one end of the connection column is connected with the first screw cap, while the other end is connected with one end of the resistor; the other end of the resistor is connected one end of the second screw cap; and the other end of the second screw cap is connected with the steel core. Thesacrificial magnesium alloy anode with the external resistor can reduce the potential difference between the magnesium alloy rod and a water heater liner and reduce the drive current so as to reducethe consumption rate of the sacrificial magnesium alloy anode to achieve the aim of protecting the water heater liner for a long period.
Description
Technical field
The present invention relates to sacrificial magnesium alloy anode, particularly a kind of sacrificial magnesium alloy anode that in original sacrificial magnesium alloy anode, increases auxiliary resistance.
Background technology
Electric water heater is used for the heating of family and process water, and the key part of decision electric water heater work-ing life and manufacturing cost promptly is the inner bag of water-heater.Liner material has stainless steel inner container, enamel inner container, zinc-plated inner bag and special spraying inner bag etc. several.In use, be medium with the water that heats, on stainless steel inner container,, form a lot of little galvanic cells particularly at weak positions such as weld seams, cause the corrosion of inner bag, on inspection, the corrosion of water-heater stainless steel inner container occurs near the weld seam more than 95%.For work-ing life of improving inner bag and reduce because the Hazard Factor such as electric leakage that the inner bag corrosion causes, people utilize the mode that adds sacrificial anode to come inner bag is carried out anti-corrosion protection usually.
At present, because sacrificial magnesium alloy anode has low cost, high-quality use properties and life-span, use quite ripely at home and abroad on the electric water heater market.Because the sacrificial magnesium alloy anode cost is low, and it is convenient to change, therefore by changing sacrificial magnesium alloy anode in the set time, can significantly reduce the corrosion of water heater liner, the corrosion of prolongation inner bag and minimizing are because the generation of the danger such as the electric leakage of leaking that the inner bag corrosion causes.
But because the driving current potential of magnesium alloy quite high (current potential of magnesium alloy be-about 1.70V), sacrificial magnesium alloy anode is the water quality according to heating to the protection effect of inner bag on the one hand, if one side is determined by the material of inner bag in addition.Can calculating by the surface-area of inner bag when enamel inner container is selected magnesium anode for use, generally is 200g/m
2About.And stainless steel inner container directly contacts with water, and bare area is very big.Stainless steel inner container that specification is identical and enamel inner container all need to adopt the magnesium anode protection, and the metallic surface that obvious stainless steel inner container need be protected will be far longer than the latter.Add the protection potential (0.85VCu/CuSO that is equivalent to enamel inner container
4Electrode), much higher (the 0.4V Cu/CuSO of the protection potential of stainless steel inner container
4Electrode).The current potential of magnesium anode is-1.70V, with the potential difference 0.85V of enamel inner container, and reaches 1.30V with the potential difference of stainless steel inner container.With water is that driving voltage was very big after medium and magnesium anode constituted galvanic cell, and it is relatively also very big to produce electric current.The magnesium anode dissolution rate is inevitable also fast, does not reach the purpose of long period protection inner bag.
(for example: the magnesium anode life-span of Shi Yonging stainless steel) how to prolong in specific inner bag? generally speaking; by between sacrificial magnesium alloy anode and protected inner bag, increasing a resistance; reduce its driving voltage, a kind of way that simply should go thereby the generation magnitude of current of reduction magnesium anode be can yet be regarded as.
Summary of the invention
It is fast to the objective of the invention is to solve in the above-mentioned prior art existing magnesium anode dissolution rate, can not protect the inner bag problem long period.
For solving the problems of the technologies described above, the invention provides a kind of sacrificial magnesium alloy anode that is provided with external resistor, it comprises first screwed cap, magnesium alloy bar and steel core, wherein between screwed cap and magnesium alloy bar, be provided with a device, this device comprises joint pin, resistance and second screwed cap, one end of this joint pin is connected with this first screwed cap and the other end is connected with an end of this resistance, the other end of this resistance is connected with an end of this second screwed cap, and the other end of this second screwed cap is connected with this steel core.
According to described sacrificial magnesium alloy anode, wherein between this first screwed cap and this magnesium alloy bar, be provided with insulation covering.
According to described sacrificial magnesium alloy anode, wherein this device also comprises an isolator, and this isolator is packaged together this joint pin, this resistance and this second screwed cap.
According to described sacrificial magnesium alloy anode, the resistance value that can regulate this resistance according to the water quality and the liner material of water-heater wherein.
The advantage that is provided with the sacrificial magnesium alloy anode of external resistor of the present invention is; can reduce the potential difference between magnesium alloy bar and the water heater liner; reduce drive current, thereby reduce the spending rate of sacrificial magnesium alloy anode, reach the purpose of long-time protection water heater liner.
Description of drawings
Fig. 1 is the structural representation of traditional sacrificial magnesium alloy anode.
Fig. 2 is the structural representation of resistance component of the present invention.
Fig. 3 is the structural representation that is provided with the magnesium alloy anode of external resistor of the present invention.
Embodiment
Normally used extrusion magnesium alloy sacrificial anode is made up of three parts as shown in Figure 1, treated screwed cap 1 (for example, steel screwed cap), magnesium alloy bar 2 and steel core 3.Screwed cap 1 is assembled together with the inner bag of water-heater, and wherein the inner bag of water-heater is made by enamel or stainless material usually, and steel core 3 is played a supporting role, during assembling and screwed cap 1 welded together.The water that needs in the inner bag of water-heater, screwed cap 1, magnesium alloy bar 2 and the inner bag like this to heat forms a loop; if lose electronics owing to corroding in the inner bag of water-heater; because the current potential of magnesium alloy bar is lower than it; so the electronics in the magnesium alloy bar flow in the inner bag that loses electronics; and produce magnesium ion and be dissolved in the water, the stainless steel of water-heater or enamel inner container are protected like this.Steel core 3 plays and supports and ligation.As mentioning in background technology, owing to being that driving voltage was very big after medium and magnesium anode constituted galvanic cell with water, it is relatively also very big to produce electric current.The magnesium anode dissolution rate is inevitable also fast, does not reach the purpose of long period protection inner bag, thereby the life-span of water heater liner is reduced.
The present invention has then designed a kind of new sacrificial magnesium alloy anode structure with device 9.As shown in Figure 2, this device 9 is made up of joint pin 4, resistance 5 and screwed cap 6.Wherein, joint pin 4 is to be made of metal, and connects together with screwed cap 1 during assembling.Preferably, joint pin 4 connects together with the mode of screwed cap 1 by welding.One end of resistance 5 and joint pin 4 welding, the other end and screwed cap 6 welding.One end of screwed cap 6 is connected with the lead-in wire of resistance 5, and the other end is connected with steel core.Preferably, joint pin 4, resistance 5 and screwed cap 6 encapsulation are got up, conveniently to be installed to while protective resistance on the magnesium alloy anode by isolator 7.
Fig. 3 is the structure iron that is equipped with the sacrificial magnesium alloy anode of device 9, and wherein screwed cap 8 is different with the screwed cap 1 among Fig. 1, and it is through the screwed cap that changes, and do not have internal thread, and length is greater than the length of screwed cap among Fig. 11.In use, in order to make electric current (as shown in Figure 2 through device 9, device 9 is made of jointly joint pin 4, resistance 5, screwed cap 6 and isolator 7) and work, between screwed cap 8 and magnesium alloy bar 11, be provided with an insulation covering 10, make electric current flow to screwed cap 8 via resistance 5 by this set, rather than be flowed directly to screwed cap 1 from magnesium alloy bar 2 like that in the image pattern 1 from magnesium alloy bar 11.Like this owing to be provided with a resistance between magnesium alloy bar 11 and the protected water heater liner; so the potential difference between magnesium alloy bar 11 and the water heater liner has reduced than the situation that is not provided with resistance 5 of Fig. 1; thereby reduce drive current; reduce the spending rate of sacrificial magnesium alloy anode; reach the purpose of long-time protection water heater liner, increased the work-ing life of water heater liner.
In addition, can adjust the value of resistance, make the driving current potential of its protection remain on a suitable numerical value according to the water quality of reality use and the material of inner bag.Under the situation of the driving voltage that can reach protection magnesium alloy inner bag, make the life-span of sacrificial magnesium alloy anode reach best.
Claims (4)
1, a kind of sacrificial magnesium alloy anode that is provided with external resistor, it comprises first screwed cap, magnesium alloy bar and steel core, it is characterized in that, between screwed cap and magnesium alloy bar, be provided with a device, this device comprises joint pin, resistance and second screwed cap, wherein an end of this joint pin is connected with this first screwed cap and the other end is connected with an end of this resistance, and the other end of this resistance is connected with an end of this second screwed cap, and the other end of this second screwed cap is connected with this steel core.
2, sacrificial magnesium alloy anode as claimed in claim 1 wherein is provided with insulation covering between this first screwed cap and this magnesium alloy bar.
3, sacrificial magnesium alloy anode as claimed in claim 1, wherein this device also comprises an isolator, this isolator is packaged together this joint pin, this resistance and this second screwed cap.
4, sacrificial magnesium alloy anode as claimed in claim 1, the wherein resistance value that can regulate this resistance according to the water quality and the liner material of water-heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810140843A CN101638787A (en) | 2008-07-29 | 2008-07-29 | Sacrificial magnesium alloy anode with external resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810140843A CN101638787A (en) | 2008-07-29 | 2008-07-29 | Sacrificial magnesium alloy anode with external resistor |
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| CN101638787A true CN101638787A (en) | 2010-02-03 |
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| CN200810140843A Pending CN101638787A (en) | 2008-07-29 | 2008-07-29 | Sacrificial magnesium alloy anode with external resistor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001012A (en) * | 2012-11-16 | 2013-03-27 | 吉林市能兴电力设备有限公司 | Anti-corrosion resistance-reducing lightning protection grounding device adopting multi-component alloy grounding body |
| CN103542535A (en) * | 2013-10-18 | 2014-01-29 | 天津东义镁制品股份有限公司 | Airtight seal thread structure of magnesium alloy sacrificial anode for water heater |
| CN103668222A (en) * | 2012-09-21 | 2014-03-26 | 珠海格力电器股份有限公司 | Resistance magnesium rod and water tank comprising same |
| CN104142024A (en) * | 2013-05-07 | 2014-11-12 | 博西华电器（江苏）有限公司 | Water heater |
| WO2023071259A1 (en) * | 2021-10-25 | 2023-05-04 | 芜湖美的厨卫电器制造有限公司 | Ce-containing magnesium alloy sacrificial anode and preparation method therefor and application thereof |
-
2008
- 2008-07-29 CN CN200810140843A patent/CN101638787A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668222A (en) * | 2012-09-21 | 2014-03-26 | 珠海格力电器股份有限公司 | Resistance magnesium rod and water tank comprising same |
| CN103001012A (en) * | 2012-11-16 | 2013-03-27 | 吉林市能兴电力设备有限公司 | Anti-corrosion resistance-reducing lightning protection grounding device adopting multi-component alloy grounding body |
| CN104142024A (en) * | 2013-05-07 | 2014-11-12 | 博西华电器（江苏）有限公司 | Water heater |
| CN104142024B (en) * | 2013-05-07 | 2018-08-07 | 博西华电器（江苏）有限公司 | A kind of water heater |
| CN103542535A (en) * | 2013-10-18 | 2014-01-29 | 天津东义镁制品股份有限公司 | Airtight seal thread structure of magnesium alloy sacrificial anode for water heater |
| WO2023071259A1 (en) * | 2021-10-25 | 2023-05-04 | 芜湖美的厨卫电器制造有限公司 | Ce-containing magnesium alloy sacrificial anode and preparation method therefor and application thereof |
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Application publication date: 20100203 |