CN1211834A - Earthing device of anti-corrosion composite material - Google Patents
Earthing device of anti-corrosion composite material Download PDFInfo
- Publication number
- CN1211834A CN1211834A CN 97116521 CN97116521A CN1211834A CN 1211834 A CN1211834 A CN 1211834A CN 97116521 CN97116521 CN 97116521 CN 97116521 A CN97116521 A CN 97116521A CN 1211834 A CN1211834 A CN 1211834A
- Authority
- CN
- China
- Prior art keywords
- anticorrosion
- electric conductor
- metallic object
- graphite
- mentioned
- 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.)
- Pending
Links
Images
Abstract
A grounding device with anticorrosion composition is composed of cable, metal body connected to cable, and anticorrosion electric conductors adhered to surfaces of metal body. Said anticorrosion electric conductor has resistivity lower than that of ambient ground and provides anticorrosion protection and conduction of grounding current for metal body. Its advantages include stable grounding resistance, long service life, high mechanical strength and low cost.
Description
The present invention relates to a kind of earthing device of anti-corrosion composite material.
At present, earth electrode is many with homogenous material, i.e. a certain making in steel, copper or copper alloy, carbon element (referring to non-graphitized carbon element), the graphite.
Steel is a main material of making earth electrode at present.The steel earth electrode is embedded in underground time corrosion very fast (according to " metals handbook " record, actual measurement carbon steel be embedded in 2 years maximum hot spot degree of depth can reach 3.75mm in the clay), causes earth resistance to raise.Need often its grounding resistance of monitoring for this reason, in order to avoid the safety of normal operation of the equipment that influences and equipment and the person, and must before the grounding resistance liter reach the regulation boundary, overhaul or heavily bury.Especially moist and be rich in electrolytical burying underground in the environment, all need turn over every year usually and dig trimming, even zinc-platedly also produce little effect, because zinc corrosion rate in water is 0.015-0.150mm/a, general zinc coat just went to pot in 1 year in wet soil.
The extensive degree that copper (comprising copper alloy) matter earth electrode is used only is lower than the steel earth electrode.Though the corrosion rate of copper is lower than steel, anticorrosion still meaningful to it, especially as the brass in soil muddy water, its corrosion rate is up to 3mm/a (seeing " corrosion resistance of non-ferrous metal and application thereof " Zhu Zufang work).Copper is too expensive, and its market unit price is more than 7 times of ordinary steel steel, and this is its major defect.
Graphite and carbon element are one of ancient earthing materials.Their advantage is corrosion-resistant.But mechanical strength and machinability are poor, be difficult to make than large tracts of land or than earth electrode length or abnormity, and such earth electrode are needed for reducing drift resistance exactly.Same its earth electrode diameter generally all is not less than 100mm because of bad mechanical strength, and thickness is not less than 50mm, takes material.And their resistivity is than steel or copper height (bad) 10
2-10
5(seeing Table 1).Their market unit price is equivalent to the 40-60% of copper up to more than 3.5 times of common iron.In addition, carbon element or graphite are nonmetal, and they are also comparatively bothersome with being connected of cable.Graphite that above reason make to adopt or connecting carbon to ground body are to reach product cost that a certain grounding resistance spends usually up to steel or copper earth electrode 3-7 times even higher.
The objective of the invention is, a kind of earthing device is provided, it is enough to overcome the shortcoming of present earthing device.The earth resistance that adopts it to reach is not inferior to the metal earth electrode; Corrosion resistance is good simultaneously, the earth resistance value stabilization, and service time is long; And the mechanical strength height, highly processable can relatively easily be processed into the comparatively light and handy earth electrode of different shape and size; And the ground connection expense is all lower significantly than above-mentioned existing earth electrode.
The object of the present invention is achieved like this: earthing device of the present invention (seeing Fig. 1 of Figure of description) comprises cable (1), the metallic object that is connected with cable (2), anticorrosion electric conductor (3 among the figure and 4).Add that (1) (2) in fact are equivalent to general metal earth electrode at present, so apparatus of the present invention can regard that also the surface that will contact with the earth adds anticorrosion electric conductor and constitutes as on the metal earth electrode.Metallic object and anticorrosion electric conductor are combined into integral body with bonding mode (being aided with bolted in case of necessity).May all glued joint anticorrosion electric conductor with the contacted metallic object all surfaces of the earth when generally speaking, this device moves; But sometimes for some reason, anticorrosion electric conductor can not be gluedd joint on a part of surface of this device metal body, coating as the face of land of natural grounding substance only need be brushed with top and for example can be brushed general anti-corrosive paints to reducing little make progress whole of drift resistance effect during artificial earth electrode's shallow embedding.The complex that earth current constitutes through cable, metallic object and anticorrosion electric conductor flows being grounded between object and the earth, thereby produces effective ground connection effect.This resistivity of installing anticorrosion electric conductor is not higher than to bury covers around this device the resistivity of material greatly.Therefore, the grounding resistance that adopts this device and obtained is not higher than the metal earth electrode.Anticorrosion electric conductor is that metallic object is anticorrosion, make this device can be under stable earth resistance long-term work and needn't turn over to dig heavily midway and bury.But and the material cost of this device because of reasons such as metallic object attenuate than at present any earth electrode is all low, its ground connection expense is that present earth electrode is below 50%.
The present invention is further illustrated below in conjunction with accompanying drawing, form and embodiment.
Fig. 1 is the structure chart of example 1 of the present invention,, uses dull and stereotyped ground connection installation drawing of the present invention that is.
Fig. 2 is the structure chart of example 2 of the present invention,, uses pipeline natural grounding substance installation drawing of the present invention that is.
Table 1 is various anticorrosion conductive adhesion things, earthing material, bury the resistivity of surrounding material underground.
Table 2 is this device immersion test results under mal-condition.
Table 3 is these devices and the comparison of steel at present, copper, graphite matter earthing device ground connection expense.
The metallic object of this device plays conduction and optimizes to distribute to be grounded the earth current between equipment and the earth and to bear mechanical force. Compare with general metal connecting terrain, this device metal body similarly can be made various shapes and different size as required, so the metallic object of this device can be column, hollow segment, can also be the compound solid that is combined into by an above solid. The metallic object of this device can be the metal object that has ground connection other purposes in addition concurrently, as partly or entirely being embedded in the artificial earth electrodes such as underground metal structure, water supply and sewerage pipeline, penetration pipe, can be used as metallic object with the earthing or grounding means that technical solution of the present invention consists of, all be a kind of of this device. Be embedded in underground earth cable heart yearn, be embedded in band steel that underground grounding connection uses etc., also can be used as metallic object and consist of earthing or grounding means with technical solution of the present invention, also all belong to this device.
Anticorrosion electric conductor had both played protective grounding body metal makes it corrosion; the double task of bearing conductive electric current between metallic object and the earth again; and, make grounding resistance after burying underground keep adopt the level of respective metal grounding body (refer to not with the identical such metal connecting terrain of the metallic object of anticorrosion electric conductor). Anticorrosion electric conductor can only have one deck, for example only at the anticorrosion conductive adhesion thing of metal body surface coating one deck 0.3-1.0mm, or on the metallic object outer surface glueds joint graphite body; Anticorrosion electric conductor also can be composited with bonding mode by a plurality of anticorrosion electric conductors (son) layers, such as example 1,2 hereinafter like that by sublayer (3) splicing of the anticorrosion electric conductor sublayer (4) of graphite matter and the anticorrosion conductive adhesion thing anticorrosion electric conductor of formation that is combined with each other. Different anticorrosion electric conductor (son) layer can be used identical material, also can be with different materials.
The material that consists of anticorrosion electric conductor can be that anticorrosion conductive adhesion thing, graphite, carbon element etc. have concurrently anticorrosion and the electric conductivity material. Anticorrosion conductive adhesion thing is mixed by the material that comprises the adhesive that possesses antiseptic property and loose shape conducting objects, and solidifies when coating and after the coating and to form; So-called loose shape conducting objects refers to that graphite powder, carbon dust, copper powder, carbon fiber section, copper wire section etc. are powdery or filamentous metal or conductive non-metals; Anticorrosion conductive adhesion thing solidify and reach certain thickness after; coated metal body surface is hedged off from the outer world; metallic object is played the anti-corrosion protection effect, and anticorrosion conductive adhesion thing itself also can keep long-lived by suitable apolegamy material, brings into play for a long time antisepsis.
After anticorrosion conductive adhesion thing solidified, the individuality of diffusing shape conducting objects wherein (powder, filament) is overlap joint mutually, formed conductive network, thereby gave anticorrosion conducting objects with conductivity.The content that improves the shape conducting objects of loosing in the anticorrosion conductive adhesion thing within the specific limits can improve the conductivity of anticorrosion conducting objects, but, during this too high levels, conductivity improve little and corrosion resistance therefore the time liquid binding loose and formed more slight void between the particle, filament of shape conducting objects, left over passage for the infiltration of oxygen molecule, hydrone and electrolyte ion.In order to guarantee necessary anti-corrosive properties, the volume of adhesive and diffusing shape conducting objects (not comprising space wherein) is than not being lower than 1: 1.1 in the anticorrosion conductive adhesion thing.
Be for the effectively infiltration of prevention oxygen molecule, hydrone and electrolyte ion equally, guarantee the anti-corrosion protection of metallic object necessity, the thickness of anticorrosion electric conductor should be not less than 0.3mm, is generally 0.5-1.0mm.
Splicing between metallic object and anticorrosion electric conductor or the anticorrosion electric conductor sublayer can be with above-mentioned anticorrosion conductive adhesion thing at adhesive, also can utilize not the top layer resin slurries of gel to make adhesive on the anticorrosion conducting objects of coating just.
The manufacturing process of a kind of earthing device of anti-corrosion composite material and a kind of anticorrosion electric conductor thereof is as follows.
Cable (1) is connected with welding with metallic object (2); Metallic object (1) surface must oil removing, rust cleaning, and guaranteeing not have dirt, not have moisture residual; The sharp-pointed corner of metallic object and weld seam must be delayed in the polishing garden;
One of prescription of anticorrosion conducting objects (true volume ratio) is:
1. methacrylic acid modified epoxy
* 145-70 part
2. diffusing shape conducting objects
* 230-55 part
3. cobalt naphthenate
* 30-2 part
4. methyl ethyl ketone peroxide
* 41-2 part
* 1The solution of methacrylic acid modified epoxy in styrene contains amount of solid 55-70%.
* 2This proportioning is that granularity is not more than the graphite powder of 0.17mm or copper powder, diameter is not more than 0.15mm length less than the copper wire section of 1mm or the total amount of carbon fiber section, and it and the 1st 's summation is 100 parts.These materials all must intensive drying before adding binding.
* 3The styrene solution that contains 1% cobalt naphthenate, so the addition of cobalt element is 0-0.02 part.
* 4The styrene or the phthalic acid dimethyl ester solution that contain methyl ethyl ketone peroxide 50%, or 1-4 part contains 50% styrene or dibutyl phthalate (DBP) solution, therefore, the addition of MEKP is respectively 0.5-1.0 part, and cyclohexanone peroxide is 0.5-2.0 part.When facing coating, add.
Evenly stir by above-mentioned prescription is reinforced one by one, the anticorrosion conductive adhesion thing of making evenly is coated in metal body surface with it immediately at the 4th kind of material of adding and after evenly stirring.The anticorrosion conductive adhesion thing of gel can not be used for coating.After anticorrosion conducting objects is solid tentatively firmly, the even in the above thick graphite powder of spreading one deck 2-5mm is gently defeated and is scraped, like this, after treating that anticorrosion conductive adhesion thing (3) all solidifies, just gluedd joint the anticorrosion electric conductor sublayer (4) of the graphite powder formation graphite matter of one deck densification at its outer surface.Here, utilized to be subjected to the air inhibition to remain in the adhesive that the surperficial uncongealed binding liquid of binding makes to glued joint graphite powder, the graphite powder that covering simultaneously gets on will glued joint plays the effect of solidifying hurry up for binding obstruct air promotion binding top layer again.Binding sublayer (3) thickness of the anticorrosion conduction in the anticorrosion electric conductor of this kind is not less than 0.3mm; The gross thickness of the binding (3) of anticorrosion conductive seed layer of graphite (4) and anticorrosion conduction is not less than 0.5mm.
Conductivity about this device, because anticorrosion electric conductor and all be starkly lower than resistivity (seeing Table 1) around the earthing device as the anticorrosion conducting objects resistivity of cementing thing, no matter this device adopts the sort of structure, the earth resistance that adopts this device to reach can not be higher than the corresponding metal earth electrode, that is the metal earth electrode that, is not higher than this device that is equivalent to not have anticorrosion electric conductor.This is analyzed as follows.
As previously mentioned, apparatus of the present invention can be regarded as and cover anticorrosion electric conductor on metal earth electrode surface and constitute.Therefore, this problem is only needed the comparison that performs an analysis of the earth resistance of this device and corresponding metal earth electrode.
The corresponding metal earth electrode is buried the metal surface, back underground and is directly contacted with the earth because of not being with anticorrosion electric conductor, and its earth resistance is:
R '=R
(1)+ R
(2)+ R '
(3)+ R '
(4)+ R
(5)-------------------------(1 formula)
When the adherend that adds anticorrosion conduction (3) and the anticorrosion electric conductor of graphite (4) and after constituting this device, its earth resistance is:
R=R
(1)+ R
(2)+ R
(3)+ R
(4)+ R
(5)-------------------------------(2 formula)
Here, the binding that glueds joint each layer is considered by anticorrosion conductive adhesion thing.
</entry></row></tbody></tgroup></table></tables>In the formula: the resulting earth resistance of R '-employing metal earth electrode (not being with (3) and (4) to have only (1) and (2)); R-adopts this to install resulting earth resistance;
R
(1)The resistance of-(1); R
(2)The resistance of-(2);
R
(3)The resistance of-(3); R '
(3)-occupy the earth material drift resistance in the space of (3);
R
(4)The resistance of-(4); R '
(4)-occupy the earth material drift resistance in the space of (4);
R
(5)Other drift resistances of-the earth.
As shown in Table 1:
R
(3)＜＜R′
(3)????R
(4)＜＜R′
(4)
So R＜R '
Again because of R＞＞R '
(3)＞＞R '
(3)-R
(3), and R＞＞R '
(4)＞＞R '-R
(4),
Therefore can think: R=R ' or R ≯ R '
The conclusion of above-mentioned analysis has also obtained confirmation by simulated experiment.The experiment situation is as follows:
Three of the identical grade of steel steel plates of 50 * 50 * 1mm, make 1,2, No. 3 sample each one, 1
#Sample is made by this device technique scheme, and its arbitrary anticorrosion electric conductor gross thickness all is 0.5mm, the prescription of its anticorrosion conductive adhesion thing (3) and the anticorrosion electric conductor of graphite matter (4) and immersion test 1 hereinafter
#It is identical to fill a prescription, anticorrosion conductive adhesion thing thickness 0.5-2.0mm; 2
#With 3
#Be not with anticorrosion conductive adhesion thing (3) and the anticorrosion electric conductor of graphite matter (4), 2
#Sample is used for simulating the common metal earth electrode, and all the other are all with 1
#Sample is identical.
With 3
#Sample immerses the place of 500mm under water in a muddy sewage pond, from its 5 meters with 1
#With 2
#Sample also immerses 500mm place under this pond water.Take turns to record the result, 35 times with digital multimeter
#Sample and 1
#Or 2
#Resistance value between the sample fluctuates between 233-241, average out to:
1
#-3
#Resistance=237.4 Ω; 2
#-3
#Resistance=237.6 Ω.
Above-mentioned analysis and test explanation are though the resistivity of anticorrosion electric conductor is more much higher than metal, because than low 1-5 the order of magnitude of the resistivity of burying environment underground, earthing device can not make earth resistance increase because having increased anticorrosion electric conductor.Also illustrate simultaneously when burying environment resistivity underground and be not less than 1 Ω and adopt the anticorrosion conductive adhesion thing of graphitiferous powder to meet the demands, need not to adopt anticorrosion conductive adhesion thing expensive, low-resistivity.
This device has kept metal earth electrode mechanical strength height, advantage that machinability is good.Because the matrix of this device is a metallic object, this device can make different shape and the size that metal ground connection physical efficiency makes.Its geometry can be single column, for example earth electrodes such as steel plate, angle steel, steel pipe, or non-column for example are fit to the pot shape earth electrode that water storage function is arranged that use in area short of rain, or compound solid, for example bury natural grounding substances such as underground profiled metal structure or metallic conduit underground.In order to obtain as far as possible little drift resistance with the least possible metal consumption, earth electrode should have enough big length, width and as far as possible little thickness, as thin plate, frame body, reticulate body etc., enough big length and suitable little area of section are perhaps arranged, as angle steel, steel pipe etc., this device can satisfy these requirements, and corrosion resistant graphite earth electrode is difficult to accomplish.
Corrosion resistance about this device confirms with following test.
The dipping sample is 50 * 50 * 1mm low-carbon hot-rolled steel, and its anticorrosion conductive adhesion thing (3) thickness is 0.3-0.5mm, and the gross thickness of its anticorrosion conductive adhesion thing (3) and the anticorrosion conducting objects of graphite (4) is 0.3-1.0mm.The prescription of the binding of anticorrosion conduction (3) is:
The 1# prescription:
The solution of methacrylic acid modified epoxy in styrene
(containing amount of solid 64%) 50 parts
Less than 45 parts of the dry graphite powders of 0.17mm granularity
1 part of the styrene solution that contains 1% cobalt naphthenate
The styrene solution that contains methyl ethyl ketone peroxide 50%
(adding when facing coating) 1 part
The 2# prescription:
The solution of methacrylic acid modified epoxy in styrene
(containing amount of solid 64%) 50 parts
Granularity is not more than 40 parts of the dry graphite powders of 0.17mm
Diameter is not more than 0.15mm copper wire section (length＜1mm) 3 parts
1 part of the styrene solution that contains 1% cobalt naphthenate
The styrene solution that contains methyl ethyl ketone peroxide 50%
(face when using and add) 1 part
The anticorrosion electric conductor of graphite (4) is the graphite powder that glueds joint the densification of adherend (3) outer surface in anticorrosion conduction.
Table 2 is the immersion test situation of sample of the present invention under mal-condition: table 2:
| Sequence number | The immersion test content | The result |
| 1 | The salt water resistance immersion test.Keep in 〉=40 ℃ of running water, every premium on currency adds 30 gram salt, floods 30 days. | Normally (anticorrosion electric conductor is still to rise, not variable color, the metal non-corroding) |
| 2 | Acidproof immersion test.In 25-36 ℃ 30% hydrochloric acid, flooded 30 days. | Normally (anticorrosion electric conductor is still to rise, not variable color, the metal non-corroding) |
| 3 | Alkaline-resisting immersion test.In 25-36 ℃ 10% sodium hydroxide solution, flooded 30 days. | Normally (anticorrosion electric conductor is still to rise, not variable color, the metal non-corroding) |
The corrosion strength that ground connection is buried environment underground is low more than this test, the grounding specifications depth of burying is below frozen soil layer, underground herein temperature stabilization and moderate, according to the result of this test and the experience life-span of this resinoid, this device can have and is not less than the life-span in 20 years and resists the ability that ground connection is buried environmental corrosion underground enough by force.
Economy about this device has following analysis.
Because this device has been inherited the advantage of metal earth electrode high strength, high machinability, increased high corrosion resistance again, therefore, can select for use more corrosion-prone but the low metal of price is made metallic object, in addition, the thickness of its metallic object also needn't consider to design the additional thickness that the metal earth electrode must consider reserves for corrosion more in the past, can be than the present obvious attenuate of metal earth electrode, as a result, cost of this device and long-term ground connection expense than present steel, copper, graphite matter earth electrode is all low significantly.
For the economy of this device more generally and steel, copper, graphite matter earthing device, existing the ground connection expense relatively listed in table 3.
Table 3:
| Sequence number | The earthing device kind | The ground connection expense relatively |
| ?1 | Earthing device of anti-corrosion composite material | ????1.00 |
| ?2 | The steel earthing device | ????7.26 |
| ?3 | Copper earthing device | ????2.32 |
| ?4 | Graphite matter earthing device | ????4.00 |
Because earth electrode specification and ground connection environment are varied, be difficult to detailed calculated relatively, for simplicity, table 3 data are to be that to be no more than same earth resistance 4 Ω in burying, work 20 years underground in the moistening clay environment be that condition carries out representatively relatively calculating with the plate shaped earth electrode (1 * 1 meter of area) that generally adopts, at the resistivity 20 Ω m that do not apply resistance reducing agent.By above illustrating as can be known, the present invention can select cheapness for use and be metallic object than the material (steel) of corrosion-vulnerable, its thickness is than other earth electrodes are obviously thin at present, in addition, because metallic object obtains anti-corrosion protection, cable and metallic object junction need not to add strong weld comprehensively and allow to use corrosive cheap drag reducer (NaCl that for example has weak erosive) with big weld seam; Resistance stabilization can be exempted overhauling heavily and buries in the use.These factors make the ground connection expense of this device be starkly lower than present any earthing device.
Utilize high machinability of the present invention, be not difficult to make the pot shape earth electrode that water storage function is arranged that use in compatibly dry down area, because of making this device can resist institute, corrosion resistance provided by the invention holds muddy water and the electrolytical erosion that neutralizes again, allow to select for use the low material-steel of price to make metallic object and needn't use expensive copper, its Master Cost will be reduced to below 15% of copper.
Especially it is worthy of note that the invention process has extremely important economic worth on natural grounding substance.At present, for overbrushing on the anti-corrosion protection natural grounding substance has covered coatings, make its ground connection function very small, the cost fund of in most cases having to is set up the artificial earth electrode.This is adopted essence of the present invention is to replace present insulating corrosion coating with anticorrosion conductive adhesion body, not only for metallic conduit, embedded object provide effective anti-corrosion measure, and increases expense hardly and has just saved the artificial earth electrode.Most engineerings just had enough natural grounding substances originally can be for utilizing, and a part that so only depends on these natural grounding substances just can satisfy the requirement of certain ground connection and needn't spend pile and manpower is set up the artificial earth electrode.For proving that this point is for following example.As ,-1.000 meters horizontally embedded diameter 36mm of technical solution of the present invention, steel pipes of long 60 meters of having adopted in will obtain the low drift resistance that reaches 1.22 Ω in clay.Such resistance level is enough to need not to bury underground the artificial earth electrode for long-term use of user of general≤4 Ω of requirement or requirement≤10 Ω earth resistances again.
This drift resistance R is calculated as follows:
R=0.366 ρ/Llg (L
2/ d/t)----------------------------------(3 formula)
=0.366·50/60lg(60
2/0.036)
=1.22Ω
ρ-soil resistivity in the formula;
The L-duct length:
The d-pipe diameter;
The t-depth of burying.
Certainly, the utilization of natural grounding substance has certain limitation, and for example, the ground connection of computer system should not be utilized the building structure natural grounding substance, seals in by it with anti-tampering.But most occasions can be utilized natural grounding substance.
Example 1.
With one of 1000mm * 1000mm * 2mm mild steel SPHC, with 95mm
2The copper cable uncoated end portion welds on steel plate.With steel plate through oil removing, eliminate rust, use sand papering.
The graphite powder that granularity is not more than 0.17mm was exposed to the sun 2 days under the burning sun in full summer, used acetone moistening again.
Anticorrosion conductive adhesion owner material formula is as follows:
The solution of methacrylic acid modified epoxy in styrene
(containing amount of solid 64%) 100 parts
1 part of cobalt naphthenate
90 parts of dry graphite powders
By 10 minutes with interior brushing with measuring major ingredient, add 1 part methyl ethyl ketone peroxide or 2 parts cyclohexanone peroxide, stir well, evenly be coated on the surface of steel plate.
Glued joint the dry graphite powder of last layer behind the gel, the light pressure makes it fine and close.Spread above one deck graphite powder covers.
Clear up refinisher after one day, and gently grind the surface, remove floating powder with sand paper.
With the flat moist clay hole interior (seeing accompanying drawing 1) that is embedded in dark 1000mm of above-mentioned finished product, firming 200mm is thick, treads, and survey earth resistance 5 times, average 3.65 Ω this moment.
5 times measured value is:
3.33；????3.87；????3.82；????3.27；????3.98(Ω)
Example 2.
The long 8m of diameter 25mm steel pipe, it is thick to apply anticorrosion electric conductor 0.5mm by the technical scheme of example 1 at its outer surface, in the flat clay that is embedded in liftoff surperficial 0.8m (seeing accompanying drawing 2).Survey to such an extent that grounding resistance is 12.62 Ω.
5 times measured value is:
13.24；????9.77；????11.48；????13.78；????14.81(Ω)
Claims (4)
1. earthing device of anti-corrosion composite material comprises metallic object, anticorrosion electric conductor, the cable that is connected with metallic object, and it is characterized in that: metallic object glueds joint to become whole with anticorrosion electric conductor; Metallic object may cover anticorrosion electric conductor with the contacted surperficial at least a portion of the earth; Anticorrosion electric conductor can be composited by the splicing of a plurality of anticorrosion electric conductors (son) layer, and these anticorrosion electric conductors (son) layers can be different materials; The resistivity of anticorrosion electric conductor be not more than bury cover this device around the resistivity of material greatly.
2. earthing device of anti-corrosion composite material according to claim 1 is characterized in that: the compound solid that the profile of above-mentioned metallic object can be column, hollow ball nullisomic, be combined into by an above solid; Above-mentioned metallic object can be to have ground connection other purposes metal objects in addition concurrently; The part of above-mentioned metallic object or all can be the part of the heart yearn of above-mentioned cable.
3. earthing device of anti-corrosion composite material according to claim 1 is characterized in that: the material of above-mentioned anticorrosion electric conductor comprises anticorrosion conductive adhesion thing, graphite and other carbon materialses; At least comprise adhesive and diffusing shape conducting objects in the anticorrosion conductive adhesion thing with antiseptic property; Above-mentioned diffusing shape conducting objects be comprise graphite powder, carbon dust, copper powder, carbon fiber section, copper wire section be powdery or filamentous material.
4. earthing device of anti-corrosion composite material according to claim 1 is characterized in that, a kind of structure of above-mentioned anticorrosion electric conductor is to comprise glueing joint in the anticorrosion conductive adhesion thing of one deck of metal body surface and being glued to one deck graphite of this binding outer surface; A kind of prescription of this anticorrosion conductive adhesion thing (by the true volume ratio) comprising: the styrene solution of methacrylic acid modified epoxy (containing amount of solid 55-70%) 45-70 part; Diffusing shape conducting objects 30-55 part, the shape conducting objects of should loosing comprises that granularity is not more than graphite powder and the copper powder of 0.17mm, and diameter be not more than the copper wire section of 0.15mm and length＜1mm and in four kinds of materials of carbon fiber section any or several, the summation of the addition of it and the next item up is 100 parts; Cobalt element 0-0.02 part in the styrene solution of cobalt naphthenate, the methyl ethyl ketone peroxide 0.5-1.0 part in styrene or phthalic acid dimethyl ester solution or the cyclohexanone peroxide 0.5-2.0 part in styrene or dibutyl phthalate (DBP) solution (adding when this component faces coating); This layer graphite is the graphite powder that glueds joint in the densification of the binding outer surface of above-mentioned anticorrosion conduction, and they can utilize and be subjected to the poly-anticorrosion conducting objects top layer of air resistance to glued joint and rise to intercept air effect, promote anticorrosion conducting objects top layer to solidify; The binding thickness of this anticorrosion conduction is not less than 0.3mm; The gross thickness of this graphite linings and anticorrosion conductive adhesion thing is not less than 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97116521 CN1211834A (en) | 1997-09-12 | 1997-09-12 | Earthing device of anti-corrosion composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97116521 CN1211834A (en) | 1997-09-12 | 1997-09-12 | Earthing device of anti-corrosion composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1211834A true CN1211834A (en) | 1999-03-24 |
Family
ID=5173922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97116521 Pending CN1211834A (en) | 1997-09-12 | 1997-09-12 | Earthing device of anti-corrosion composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1211834A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472352A (en) * | 2013-09-16 | 2013-12-25 | 国网河南省电力公司焦作供电公司 | Ground lead detection method |
| CN104269664A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Low-temperature-rise composite grounding body and preparation method thereof |
| CN105070348A (en) * | 2015-07-15 | 2015-11-18 | 湖北威达电气有限公司 | Compound grounding resistance-reducing powder |
| CN112688094A (en) * | 2020-12-31 | 2021-04-20 | 国网河南省电力公司南阳供电公司 | Anti-corrosion down lead structure for lightning protection grounding system |
-
1997
- 1997-09-12 CN CN 97116521 patent/CN1211834A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472352A (en) * | 2013-09-16 | 2013-12-25 | 国网河南省电力公司焦作供电公司 | Ground lead detection method |
| CN103472352B (en) * | 2013-09-16 | 2016-11-23 | 国家电网公司 | A kind of ground wire testing method |
| CN104269664A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Low-temperature-rise composite grounding body and preparation method thereof |
| CN104269664B (en) * | 2014-10-27 | 2016-06-08 | 武汉大学 | A kind of low temperature rise compound ground connector and its preparation method |
| CN105070348A (en) * | 2015-07-15 | 2015-11-18 | 湖北威达电气有限公司 | Compound grounding resistance-reducing powder |
| CN112688094A (en) * | 2020-12-31 | 2021-04-20 | 国网河南省电力公司南阳供电公司 | Anti-corrosion down lead structure for lightning protection grounding system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060070871A1 (en) | Cathodic protection system for underground storage tank | |
| CN1207443C (en) | Cathodic protection methods and apparatus | |
| JPS60150573A (en) | Electrically connecting method | |
| CN1211834A (en) | Earthing device of anti-corrosion composite material | |
| CN108546502B (en) | Conductive anticorrosive paint and corrosion resistance evaluation method thereof | |
| Kapitanović et al. | The influence of phosphonic acid pretreatment on the bronze corrosion protection by waterborne coating | |
| JP5564691B2 (en) | Electrically conductive water-based paint and method for cathodic protection of reinforced concrete structures using the paint | |
| JPH0570977A (en) | Electric corrosion preventing method for reinforced concrete structure | |
| US4443312A (en) | Situ method of coating buried conductive structures | |
| CN109457256B (en) | Carpet type sacrificial anode device for submarine pipeline cathode protection repair | |
| CN1563495A (en) | Metal piece for cladding anode layer | |
| Rajani et al. | Protection of ductile iron water mains against external corrosion: review of methods and case histories | |
| CN1749433A (en) | Electrochemical earthing body | |
| Bennett | Chemical enhancement of metallized zinc anode performance | |
| JPS63101464A (en) | Electrically conductive coating film for use in electrolysis of sea water | |
| JP4037074B2 (en) | Corrosion prevention method and apparatus for coated sheathed buried pipe | |
| RU2768063C1 (en) | Method for cathodic protection of an underground facility | |
| Cho et al. | Effect of RuCl 3 Concentration on the Lifespan of Insoluble Anode for Cathodic Protection on PCCP | |
| JPH0423406Y2 (en) | ||
| Matthiesen et al. | Corrosion of archaeological iron artefacts compared to modern iron at the waterlogged site Nydam, Denmark | |
| CN2732759Y (en) | Electrochemical grounding body | |
| Abreu | Experience in material selection for grounding systems for power transmission towers | |
| Caseres et al. | Zn-rich primer evaluation for corrosion protection of us marine corps ground vehicles | |
| JPS5876465A (en) | Corrosion proof covering material | |
| CN115613038A (en) | Sacrificial anode performance detection method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |