CN1109625A - Anti-corrosion electric conducting compound and its application - Google Patents
Anti-corrosion electric conducting compound and its application Download PDFInfo
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- CN1109625A CN1109625A CN 94103664 CN94103664A CN1109625A CN 1109625 A CN1109625 A CN 1109625A CN 94103664 CN94103664 CN 94103664 CN 94103664 A CN94103664 A CN 94103664A CN 1109625 A CN1109625 A CN 1109625A
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- Prior art keywords
- corrosion
- grams
- electrically conductive
- electric conducting
- conducting compound
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- KVBYPTUGEKVEIJ-UHFFFAOYSA-N benzene-1,3-diol;formaldehyde Chemical compound O=C.OC1=CC=CC(O)=C1 KVBYPTUGEKVEIJ-UHFFFAOYSA-N 0.000 description 1
- PGEAEAYLSCKCCO-UHFFFAOYSA-N benzene;n-methylmethanamine Chemical compound CNC.C1=CC=CC=C1 PGEAEAYLSCKCCO-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Substances FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- XCJXQCUJXDUNDN-UHFFFAOYSA-N chlordene Chemical compound C12C=CCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl XCJXQCUJXDUNDN-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 1
- YQLZOAVZWJBZSY-UHFFFAOYSA-N decane-1,10-diamine Chemical compound NCCCCCCCCCCN YQLZOAVZWJBZSY-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000011532 electronic conductor Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000006735 epoxidation reaction Methods 0.000 description 1
- 239000005007 epoxy-phenolic resin Substances 0.000 description 1
- 229920005546 furfural resin Polymers 0.000 description 1
- 125000002425 furfuryl group Chemical group C(C1=CC=CO1)* 0.000 description 1
- VANNPISTIUFMLH-UHFFFAOYSA-N glutaric anhydride Chemical compound O=C1CCCC(=O)O1 VANNPISTIUFMLH-UHFFFAOYSA-N 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000005577 local transmission Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- AUOKSPBBOCQYIX-UHFFFAOYSA-N n,n-dimethyl-1,1-diphenylmethanamine Chemical compound C=1C=CC=CC=1C(N(C)C)C1=CC=CC=C1 AUOKSPBBOCQYIX-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- KSCKTBJJRVPGKM-UHFFFAOYSA-N octan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCCCCCC[O-].CCCCCCCC[O-].CCCCCCCC[O-].CCCCCCCC[O-] KSCKTBJJRVPGKM-UHFFFAOYSA-N 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-M octanoate Chemical compound CCCCCCCC([O-])=O WWZKQHOCKIZLMA-UHFFFAOYSA-M 0.000 description 1
- YOURXVGYNVXQKT-UHFFFAOYSA-N oxacycloundecane-2,11-dione Chemical compound O=C1CCCCCCCCC(=O)O1 YOURXVGYNVXQKT-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- IWDCLRJOBJJRNH-UHFFFAOYSA-N para-hydroxytoluene Natural products CC1=CC=C(O)C=C1 IWDCLRJOBJJRNH-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 235000010388 propyl gallate Nutrition 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- XSCHRSMBECNVNS-UHFFFAOYSA-N quinoxaline Chemical compound N1=CC=NC2=CC=CC=C21 XSCHRSMBECNVNS-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- 229960001124 trientine Drugs 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- 239000002383 tung oil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The present invention discloses a corrosion-resisting conducting compound used for coating grounding metal conductor. It is mainly composed of conductive powder material and binding agent, and in order to raise binding effect in the compound the adhesive, firming agent and promoter are contained. After the grounding metal conductor is coated with the corrosion-resisting conducting compound, the grounding metal conductor not only has the good conductivity, but also has the good electrochemical-resisting properties, and can resist acid corrosion, caustic corrosion and salt corrosion. The grounding device made of the grounding metal conductor whose surface is coated with the invented corrosion-resisting conducting compound can be stably normally worked for a long period in a strong corrosive ground.
Description
The present invention relates to a kind of anti-corrosion electric conducting compound and application thereof, particularly a kind of anti-corrosion electric conducting compound that is used to be coated on the grounded metal surface.
Grounding technology is building lightning protection, guarantee the necessary technology measure of various electric power, electronic equipments safety work.For a long time, the ground connection of power plant, electric substation, machinery equipment, electronic instruments, building and post and telecommunications equipment etc. is steel directly to be placed into the soil be connected in parallel as earthing device mostly.Earth electrode in placing into the soil can constantly be subjected to the electrochemical corrosion of soil.In the more serious soil of some electrochemical corrosion, as long as several years just can erode earth electrode, destroyed earthing device and grounding system, thereby caused serious accident and cause great economic loss sometimes.Therefore, the decay resistance that how to improve grounding system is a problem that urgency is to be solved.
A normal now solution that adopts is to adopt galvanized steel to substitute common iron as earth electrode.Compare with common iron, the be corroded speed of galvanized steel in soil can slow down to some extent.But this method still can not solve the earth electrode etching problem in the serious soil of electrochemical corrosion effectively.Another kind method is to adopt copper to substitute common iron as earth electrode.Because copper has decay resistance preferably, it can solve the etching problem of the not too serious soil of electrochemical corrosion to earth electrode preferably.But from economic angle, the price of copper is higher than iron and steel far away, and the earthing device that copper iron is used with can make the corrosion of iron and steel earth electrode more serious.Also have a kind of method to enclose and bury coke (conduction) underground in grounding net.Because the coke of drying regime is an electronic conductor, thus on electrode and coke interface electrochemical reaction can not take place, thus will react on the interface of passing coke and soil, avoided the electrochemical corrosion of soil like this to earth electrode.But, always have certain moisture content in the general soil, and for the moist coke that certain moisture content is arranged, two kinds of conduction forms of electron conduction and ionic conduction will exist simultaneously, so still can produce electrochemical corrosion on the earth electrode surface.And the moisture content in the soil is many more, and is also serious more to the electrochemical corrosion of earth electrode.Therefore, concerning general soil, the anticorrosion ability of this way is also undesirable.It is that earthing device is adopted cathodic protection that a kind of method is arranged again.This protective device needs special power supply, complex structure, investment bigger.Therefore, it is also seldom used in the grounding system of reality.
The objective of the invention is provides a kind of good electrical conductivity that not only has for the deficiency that solves above technology, but also have excellent corrosion resisting performance, can tolerate the electrochemical corrosion of acid, alkali, salt and be used to be coated in the lip-deep anti-corrosion electric conducting compound of earth electrode.
In order to achieve the above object, a kind of anti-corrosion electric conducting compound provided by the present invention mainly is made up of conductive powder material and adhesive, and the weight ratio of conductive powder material and adhesive is 0.5 to 10 part: 1 part, and particularly can be: between 1 part at 0.8 to 6 part.In order to guarantee the conductivity of this anti-corrosion electric conducting compound, its conductive powder material is preferentially selected graphite, carbon black, aluminium powder, zinc powder, copper powder and their mixture thereof for use, also other has the conductive powder of conductivity, it mainly plays the effect of electronic conductance in electrically conductive composition, produce good electrical conductivity.According to conductive powder material what of proportion in electrically conductive composition, the specific insulation of electrically conductive composition can be 10
-3-10
3Adjust arbitrarily between the Ω .CM.In five kinds of conductive powder materials, better with the electrically conductive composition performance that graphite is made, be first-selection.
In addition, described adhesive mainly comprises adhesive made of synthetic resin and rubber based adhesives two big classes.Wherein adhesive made of synthetic resin comprises epoxy resin, phenolic resins, furfural resin, furfuryl alcohol resin, the furfuryl group furfuryl alcohol resin, furfural acetone resin, organic siliconresin, amino resins, resorcinol formaldehyde resin, xylene resin, unsaturated polyester (UP), thermosetting acrylate, polyurethane, phenolic aldehyde-Pioloform, polyvinyl acetal, phenolic aldehyde-nitrile rubber, phenolic aldehyde-neoprene, epoxy-phenolic resin, epoxy-polyamide resin, epoxy-nitrile rubber, epoxy-polysulfide rubber, phenolic aldehyde-polysulfide rubber, epoxy-nylon resin, epoxy-polybutadiene, the acrylate and the capable thing that spreads out thereof, Pioloform, polyvinyl acetal, polyamide, the thermoplasticity polyester, polyimides, poly-phenylene thioether, poly-quinoxaline, the polyphenylene quinoxaline, the polyether-type acrylate, polyester type acrylate, epoxy acrylate, the heat resistant propylene acid esters, the acrylate of band polar group and the acrylate of amido-containing acid ester base and NCO etc.Rubber based adhesives comprises neoprene, nitrile rubber, polysulfide rubber, silicon rubber, butadiene-styrene rubber and butyl rubber etc.These adhesive can use separately, also can be mixed by several adhesive and use.
In order to improve the overlay intensity and the performance of composition, also contain the adhesive solidification agent in the described anti-corrosion electric conducting compound, adhesive made of synthetic resin curing agent of the present invention mainly comprises epoxy curing agent, phenolic resin curative, furan resin hardener and other curing agent that adhesive made of synthetic resin curing is quickened.
Epoxy curing agent can be chosen wherein a kind of in alkaline curing agent, acid curing agent and the curable synthetic resin agent wantonly, and its consumption can reach 80% of content of epoxy resin, and preferably from 5% to 35%.Proper curing agents comprises amine curing agent (for example ethylenediamine, diethylenetriamine, hexahydropyridine, imidazoles and glyoxal ethyline) and curable synthetic resin agent (for example polyamide, phenolic resins, amino resins, alkyd resins and mylar).Particularly, the alkalescence curing agent comprises ethylenediamine, diethylenetriamine, triethylene tetramine, TEPA, polyethylene polyamine, hexamethylene diamine, N, N '-dimethylaminopropylamine, N, N '-diethyl amino propylamine, the monoethanolamine diethylamine, decamethylene diamine, the alkane diamines, the N-(beta-aminoethyl) pyrazine, hexahydropyridine, m-phenylene diamine (MPD), 4,4 '-diaminodiphenyl-methane, 4,4 '-diamino diphenyl sulfone, m-xylene diamine, benzyl dimethylamine, triethylamine, triethanolamine, dimethylamino methyl phenol, three 2.4.6-(dimethylamino methyl) phenol, 4,4 '-the dimethylamino diphenyl-methane, pyridine, hexamethylenetetramine, dicyandiamide, imidazoles, glyoxal ethyline, the 2-ethyl, 4-methylimidazole, 704 curing agent (glyoxal ethyline and epoxy propane butyl ether reactant), 705 curing agent (glyoxal ethyline and expoxy propane iso-octyl ether reactant), 120 curing agent (H
2N-C
2H
4-NH-C
2H
4OH), 590 curing agent (m-phenylene diamine (MPD) and expoxy propane phenyl ether mixture), 591 curing agent (the fine reactant of diethylenetriamine and propylene), 593 curing agent (diethylenetriamine and epoxy propane butyl ether condensation product).HO-C
2H
4NHC
2H
4NHC
2H
4NH
2, H
2N-(CH
2) 6-NHC
2H
4CN, 701 curing agent (phenol formaldehyde (PF) is the diamines condensation product), 702 curing agent (phenol formaldehyde (PF) m-phenylene diamine (MPD) condensation product), 703 curing agent (phenol formaldehyde (PF) ethylenediamine condensation product), the GY-051(amine that contracts), 708 curing agent (aromatic diamines and glyoxaline compound), 79-3 curing agent (modified products such as benzene dimethylamine and propylene are fine, epoxy compounds) and other can make the alkaline curing agent of epoxy resin cure.Acid curing agent comprises maleic anhydride, poly-azelaic acid acid anhydride, dichloro maleic anhydride, dodecyl suitable succinic anhydride of generation, phthalic anhydride, pyromellitic dianhydride, inner methylidyne tetrahydric phthalic anhydride, 3,3 ' 4,4 '-benzophenone carboxylic acid dianhydride, methyl inner methylidyne tetrahydric phthalic anhydride, hexahydrophthalic anhydride, chlordene inner methylidyne tetrahydric phthalic anhydride, mellophanic acid dianhydride, first hydrogen phthalic anhydride, methyl tetrahydrophthalic anhydride, glutaric anhydride, 70 acid anhydrides, 308 acid anhydrides (tung oil acid anhydride).647 acid anhydrides, oxalic acid, boron trifluoride compound, stannous chloride, stannous iso caprylate, tin octoate, hexanedioic acid glyceride and other can make the acid curing agent of epoxy resin cure.The curable synthetic resin agent comprises that polyamide, amino resins, alkyd resins, mylar and other can make the curable synthetic resin agent of epoxy resin cure.
Phenolic resin curative comprises that the mixed solution of alcoholic solution, formaldehyde-hydrochloric acid-glycerine of ethylene glycol solution, the hydrochloric acid of mahogany acid, p-methyl benzenesulfonic acid, phosphoric acid and other can make the curing agent of phenolic resin curing.Its consumption can reach 60% of phenolic resins consumption, preferably from 5%-30%.
Furan resin hardener can be chosen any one kind of them and can be made furane resins quicken the curing agent that solidifies, and its consumption can reach 40% of furane resins consumption, preferably from 3%-25%.Proper curing agents comprises toluenesulfonic acid, xylene monosulfonic acid, sulfonic acid and ethyl-sulfate.The adhesive solidification agent of being adopted specifically comprises epoxy curing agent, phenolic resin curative, furan resin hardener and other adhesive solidification agent.
In order to improve the adhesive strength of adhesive, improve the elasticity and the toughness of solidfied material, improve the thermal endurance of solidfied material, weatherability and durability, also contain adhesion agent modifier in the composition, adhesion agent modifier comprises dibutyl phthalate, repefral, diethyl phthalate, diamyl phthalate, dioctyl phthalate, triethyl phosphate, tributyl phosphate, triphenyl phosphate, triphenyl phosphite, the hexanedioic acid diethylester, tricresyl phosphate, diethyl sebacate, dibutyl sebacate, the liquid nitrile rubber, liquid polysulfide rubber, Pioloform, polyvinyl acetal, alcohol soluble nylon, polyurethane, PIC, mylar, polyether-type epoxy resin, polyester epoxy resin, side chain type epoxy resin, polysulfones, phenolic resins, organic siliconresin, polysulfone resin, poly-organosilicon alkane, silicone oil, coupling agent KH-550, coupling agent KH-560, coupling agent B-570, coupling agent KH-201, coupling agent KH-301, coupling agent VN, coupling agent 702 inorganic agents, silane, the epoxidation of styrene thing, phenyl glycidyl ether, the acrylic glycidol ether, n-butyl glycidyl ether, the p-cresol glycidol ether, diglycidyl ether, ethylene glycol diglycidylether, 1, the 3-butanediol diglycidyl ether, polyglycidyl ether, glycerol epoxy resin, the tribromo phenyl glycidyl ether, ethanol, neoprene, nylon and other preparation that adhesive solidification rerum natura can be improved.The adhesion agent modifier consumption is no more than 80% of adhesive consumption, and preferably from 5% to 35%.
This anti-genus erosion electrically conductive composition is mainly used in and is coated on the grounded metal conductor, to become corrosion resistant earthing conductor, this grounded metal conductor can be copper, aluminium, steel, iron, high-silicon cast iron, magnet, galvanized steel, tin-coated steel, galvanized iron, tin-coated copper and other metallic conductor as the ground connection purpose, wherein copper, steel, iron, tin-coated copper, galvanized steel and galvanized iron are the normal earth electrodes that adopts, and galvanized steel then is best.
The anti-corrosion electric conducting compound that the present invention obtained can be coated on the earth electrode surface easily by coated techniques such as general brushing, dip-coating, spraying and mold pressing coatings, and coating layer thickness is generally less than 20 millimeters, preferably between the 0.5-5 millimeter.The earth electrode that the surface is coated with electrically conductive composition also need carry out the curing of normal temperature cure or heating and pressurizing.Normal temperature cure generally needs 1-7 days.And heating and pressurizing is solidified, and temperature is usually less than 250 ℃, generally at 80-180 ℃; Air pressure is lower than 10 atmospheric pressure, and generally at 1 to 5 atmospheric pressure, the curing under atmospheric pressure is normal pressure and solidifies.The condition of cure of various electrically conductive composition prescription also is different, therefore must be according to the selected suitable condition of cure of concrete prescription.After curing is finished, promptly form the corrosion resistant electrically conductive composition coating of one deck on the earth electrode surface.
In order to test earth electrode surface conductance composition coating decay resistance, we have carried out corrosion resistance test to the metallic conductor that the surface is coated with the electrically conductive composition coating, and test branch metal conductive surface electrically conductive composition coating is complete not to have local damage and electrically conductive composition coating to have two kinds of situations of local damage to carry out respectively.
1, the corrosion-resistant situation that metallic conductor surface conductance composition coating is complete when not having local damage
As everyone knows, if iron and steel is directly put into diluted acid and salt solution, electrochemical corrosion will take place in steel surface at once.In case in their surface applied after the electrically conductive composition coating, again their are dropped into acid, alkali, salting liquid, again how about situation?
We are with 5 long steel bars of 11 centimetres, apply the complete electrically conductive composition coating of 8 centimeter length, 2 millimeters thick in the previous section of every steel bar, and its aft section has the steel bar of 3 centimeter length not to be coated with the electrically conductive composition coating approximately.These 5 steel bars that are coated with the electrically conductive composition coating are immersed five glass containers that 10% nitric acid, sulfuric acid, hydrochloric acid, NaOH and sodium chloride solution are housed respectively, and the degree of depth of solution is 4 centimetres, and every steel bar will have the coating of half to immerse in the solution like this.Observe the long-term decay resistance of this electrically conductive composition coating in acid, alkali, salt.
After 6 months, observe the test product of above-mentioned five glass containers again.Corrosion phenomenon does not take place in the part steel bar that the outside scribbles the electrically conductive composition coating, and the electrically conductive composition coating is intact and still keep original excellent conductive performance; Again the electrically conductive composition coating of outside is removed, find that inner steel bar is still shinny, just the same with the situation before the original coating electrically conductive composition coating.Find again in addition, the metal surface that does not have 3 centimeter length of coated with conductive composition coating in the steel bar back, though any contact do not take place with acid, alkali, salting liquid in this part metals, and only is to be exposed in the air of this glass container, and heavy corrosion has taken place at all; Especially the steel bar in 10% nitric acid and 10% sodium chloride solution, the surface corrosion situation is especially severe especially.
The above results shows that fully undamaged electrically conductive composition coating can protect inner iron and steel to exempt from the corrosion of acid, alkali, salt fully, has long-term electrochemical corrosion resistant ability.
Corrosion-resistant situation when metallic conductor surface conductance composition coating has local damage.
If directly at steel surface coating electrically conductive composition coating, then the iron and steel at electrically conductive composition coating generation local damage place should form negative electrode.In electrolyte solution, form the situation of the big negative electrode of typical primary anode like this, thereby made the iron and steel at this place produce serious electrochemical corrosion, caused pitting.If but, when the local generation of coating is damaged, can't produce serious pitting at this place at surface of galvanized steel coating electrically conductive composition coating.Following test has fully proved this conclusion.
Adopt the pad of a plating zinc on surface, all with 2 millimeters electrically conductive composition coating coating, whole zinc-plated pad is covered by among the electrically conductive composition coating on the whole surface of pad, coating is complete and do not have a breakage.Saw out a little openning with saw blade then on the surface of this pad, saw removes top electrically conductive composition coating and zinc protective layer, allows it expose inner iron village body.Again it is put in 10% the sodium chloride solution, to observe the situation of this breakage generation electrochemical corrosion.After six months time, observe this test product again.The corrosion phenomenon of iron body does not take place in the sub-place of the osculum that discovery is sawed, and whole similar when still and originally saw is good by saw kerf, only color and luster has shaded a little.And near the electrically conductive composition coating this little openning removed, the zinc layer around finding in around about 3 millimeters one and half gardens is corroded.In fact, because the corrosion potential of zinc is more negative than iron, it becomes anode the iron body at coating damage place has been played the effect of cathodic protection, has protected the iron body at this place to exempt from electrochemical corrosion.Now the zinc coat area as the whole metal surface of anode is very big; and the breakage of electrically conductive composition coating is much smaller as this bulk area of iron of negative electrode; this is the situation of the typical big little negative electrode of anode in the electrochemical corrosion protection, and it is very favourable to corrosion protection.Can utilize the iron and steel of this breakage of all surfaces zinc coat concentrated protection like this, make the iron and steel body of this breakage exempt from electrochemical corrosion.In fact this is exactly the in the past verified in practice especially effectively Combined Protection of anticorrosion ability that has, and its adopts cathodic protection and coating associating anticorrosion.Only previously used Combined Protection mainly is to be used for some large-scale metal structures underground and under water, and it does not have the requirement of conductivity, so generally all adopt coatings; And present earth electrode requires to keep favorable conductive and overflow performance, so adopt the electrically conductive composition coating.
From top discussion result as can be known, adopt the galvanized steel outside to add and be coated with the electrically conductive composition coating, can prevent the local electrochemical corrosion that causes because of electrically conductive composition coating local damage effectively.Therefore, when adopting the electrically conductive composition coating that earth electrode is protected, the optimal selection of earth electrode metal is to adopt galvanized steel.
In sum, adopt surface of galvanized steel to add the earth electrode that is coated with electrically conductive composition coating provided by the invention and have excellent corrosion resisting performance, various electrochemical corrosion such as acid and alkali resistance, salt long-term effectively.Therefore, it can solve the electrochemical corrosion problem of soil to earth electrode.
On the other hand, we adopt computer-assisted analysis and Calculation Method, the earth resistance that is coated with the conductive coating earth electrode has been carried out analytical calculation, result of calculation shows, as long as the resistivity of electrically conductive composition coating is less than soil resistivity, the electrically conductive composition coating is to the not influence of earth electrode earth resistance.In addition, again to scribbling the earthing device that electrically conductive composition coating earth electrode forms and not having the earth resistance of the earthing device that electrically conductive composition coating earth electrode forms to carry out actual measurement respectively accordingly, measurement result show both earth resistances be basically really (seeing embodiment 1 for details).Therefore, no matter be from theory analysis or from actual measurement, the coating of electrically conductive composition can not exert an influence to the earth resistance and the overflow performance of earth electrode.
Therefore, adopt surface applied to form earthing device, not only solved the electrochemical corrosion problem of soil, and earthing device itself still can keep original good earth performance earth electrode by the earth electrode of electrically conductive composition coating.So just obtained a kind of earthing device of corrosion-resistant, ground connection stable performance, it is operate as normal steadily in the long term.
Adopt surface applied provided by the invention to form corrosion-resistant earthing device, have very big economic benefit and social benefit by the earth electrode of electrically conductive composition coating.This point is particularly outstanding than serious area at soil corrosivity, in every power plant or transformer station, a bigger ground network is arranged all generally.In order to satisfy the earth resistance requirement, often in soil, imbed several tons to tens tons steel, and they are coupled together as whole ground network.This not only needs a large amount of steel, and also needs to excavate a large amount of earthwork for so many steel are imbedded the earth by certain layout, drops into a large amount of man power and materials.But than serious area, this ground network may need only several years and just be damaged by corrosion in electrochemical corrosion.Therefore drop into a large amount of steel, man power and material again, reconstruct new earthing device, this yes a kind of very big waste.In addition, all require to carry out ground connection for its every basic shaft tower of overhead transmission line, its earth resistance generally requires less than 10-20 ohm.And often setting up of transmission line will be by many meagrely-populated, traffic very inconvenient area, especially mountain area.After setting up and finish, these local transmission lines often can not go to carry out too many maintenance and transformation again.If earthing device is generally just unlikely removed to bury underground again new earthing device because soil electrochemistry corrosion just eroded very soon after several years, in fact also difficulty of normal inspection is often gone to carry out in these places.Will have a strong impact on the normal operation and the normal power supply of power circuit like this.Therefore,, adopt surface applied to have the earth electrode of electrically conductive composition layer to constitute corrosion-resistant earthing device and have a great deal of practical meanings than serious area for these electrochemical corrosion.Surface applied has the earth electrode of electrically conductive composition coating, though its cost increases to some extent than original common iron, increase approximately about 80%, its electrochemical corrosion resistant performance then strengthens greatly, can tolerate the erosion of heavy corrosion soil, guarantee earthing device normally operation steadily in the long term.Avoid Corrosion of Grounding Device to damage and build again, saved great amount of manpower, financial resources and material resources, obtained very big economic benefit and social benefit.
Anti-corrosion electric conducting compound involved in the present invention and be coated with the earth electrode of electrically conductive composition coating, raw material sources are convenient, and manufacturing process is simple, and equipment investment is few, very easily promotes the use of.
The present invention is further described by the following embodiment.
Embodiment 1
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Diethylenetriamine 30 grams
Graphite powder 200 grams
Wherein epoxy resin plays adhesive; Dibutyl phthalate is the modifier of epoxy resin, and it can reduce the viscosity of epoxy resin and improve the toughness of epoxy resin cured product; Diethylenetriamine plays curing agent.
Its manufacturing process is as follows: at first 150 gram epoxy resin (adhesive), 30 gram dibutyl phthalate (DBP)s (modifier) and 30 gram diethylenetriamines (curing agent) are mixed, and stir.And then add 200 gram graphite powders, and continue again to stir, mix until graphite powder and tacky resin are fine.So just obtained corrosion resistant electrically conductive composition, this electrically conductive composition promptly can be used for the coating of earth electrode metal surface.After earth electrode metal surface electrically conductive composition coating coating finishes, need again through normal temperature cure in 7 days, treat electrically conductive composition coating full solidification after, this earth electrode could normally come into operation.
We are coated on above-mentioned electrically conductive composition on a length and width, the thick band steel that is respectively 0.5 centimetre of 85 cm x, 6 cm x.The length of coating is 45 centimetres, about 2 millimeters of thickness.When then this root being scribbled the band steel of electrically conductive composition coating and the measure-alike band steel of another root and squeezes into a soil resistivity simultaneously and be about the paddy field of 50 Ω .CM, depth of drive is exactly 45 centimetres of the length of coating just, two band steels are at a distance of 0.6 meter (that beats is nearer, to increase the comparability of measurement result) as far as possible.Adopt ZC-8 type ground resistance measuring instrument respectively the earth resistance of two band steels to be measured, it is 36 ohm that the earth resistance of electrically conductive composition coating band steel is arranged, and is 37 ohm and there is not the earth resistance of electrically conductive composition coating band steel.To not have the band steel of coating to extract from the original place again, and have 2.3 meters of coating band steel to squeeze into soil again in distance, depth of drive still is 45 centimetres.Measurement shows have the earth resistance of electrically conductive composition coating band steel constant, still 36 ohm; And the earth resistance that does not have electrically conductive composition coating band steel is 35 ohm.From the result of top twice measurement, there is electrically conductive composition coating band steel the same basically with the earth resistance that does not have electrically conductive composition coating band steel.Both measurement numerical value is deviation slightly, mainly is that the inhomogeneities by measure error and two place's electric resistances of soil causes.
The manufacturing process of the embodiment 2-18 of back, previous section are all identical with embodiment 1 basically, promptly all are with adhesive, and modifier and curing agent mixing and stirring are coated on the earth electrode surface to this electrically conductive composition coating then.Different mainly be that the condition of cure of the electrically conductive composition coating of back has nothing in common with each other.Therefore, mainly be the concrete condition of cure of emphasizing each embodiment in embodiment 2-18 manufacturing process.
Embodiment 2
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Organic siliconresin 4.5 grams
Coupling agent KH-550 1.0 grams
Diethylenetriamine 30 grams
Graphite powder 200 grams
Wherein organic siliconresin mainly has been the effect of water-repelling agent, improves the resistance to water of solidfied material, and coupling agent KH-550 can improve glue-joint strength and improve the environmental resistance of solidfied material (resistance to water, weatherability, thermal endurance); Other is all identical with embodiment 1.
Its manufacturing process is also identical with embodiment 1.
Embodiment 3
The electrically conductive composition prescription is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Methyl-silicone oil 4.5 grams
Coupling agent KH-550 1.0 grams
Diethylenetriamine 30 grams
Graphite powder 200 grams
Wherein the organic siliconresin of methyl-silicone oil alternate embodiment 2 plays water-repelling agent, also is the resistance to water of improving solidfied material mainly.
Its manufacturing process is identical with embodiment 1.
Embodiment 4
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Polyvinyl butyral resin 30 grams
Triethylamine 30 grams
Graphite powder 210 grams
Polyvinyl butyral resin can significantly improve the shock resistance and the peel strength of adhesive solidification thing, this is favourable to earth electrode, because many earth electrodes need be squeezed into soil with impulsive force, this just wishes that it has impact strength and peel strength preferably, and triethylamine is a curing agent.
Its manufacturing process is identical with embodiment 1, and the normal temperature cure time only needs 4 days.
Embodiment 5
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Fine 40 grams of end carboxyl fourth
2-ethyl-4-methylimidazole 15 grams
Graphite powder 180 grams
End carboxyl fourth is fine can be improved the toughness of solidfied material and improve glue-joint strength.2-ethyl-4-methylimidazole is as curing agent.
Manufacturing process is identical with embodiment 1 basically.But need to adopt to be heating and curing, condition of cure is 120 ℃/6 hours.
Embodiment 6
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Hexanedioic acid glyceride 45 grams
Graphite powder 200 grams
Hexanedioic acid glyceride is curing agent.Adopt this curing agent to be cured, the good toughness of solidfied material, cementing strength height.And after each component mixes, long preservation at room temperature, pot life is very long.
Manufacturing process is substantially the same manner as Example 1, is heating and curing but need to adopt, and condition of cure is: 160 ℃/4 hours+180 ℃/4 hours.
Embodiment 7
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Phenolic resins 36 grams
18 milliliters of ethanol
Diethylenetriamine 8 grams
Graphite powder 180 grams
Ethanol is as the phenolic resins diluent.After this electrically conductive composition solidifies, resistance to water, anti-shrink property and corrosion resistance are good
Manufacturing process is substantially the same manner as Example 1, is heating and curing but need to adopt
Condition of cure: 180 ℃/6 hours.
Embodiment 8
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Phenolic resins 36 grams
18 milliliters of ethanol
Diethylenetriamine 10 grams
Graphite powder 220 grams
The electrically conductive composition performance is identical with embodiment 7 basically, but electrically conductive composition elasticity after solidifying and toughness increase.Condition of cure is also the same with embodiment 7.
Embodiment 9
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Phenolic resins 36 grams
18 milliliters of ethanol
Organic siliconresin 4.5 grams
Diethylenetriamine 10 grams
Graphite powder 220 grams
The performance of electrically conductive composition is identical with embodiment 8 basically, but the solidfied material resistance to water further strengthens.Condition of cure is also identical with embodiment 7.
Embodiment 10
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Phenolic resins 36 grams
18 milliliters of ethanol
Methyl-silicone oil 4.5 grams
Diethylenetriamine 10 grams
Graphite powder 220 grams
The performance of electrically conductive composition is identical with embodiment 8 basically, but the solidfied material resistance to water further strengthens.Condition of cure is also identical with embodiment 7.
Embodiment 11
The prescription of electrically conductive composition is as follows:
Fourth eyeball elastomeric compound 100 grams
Phenolic resins 150 grams
Stannous chloride 0.7 gram
N-propyl gallate 2 grams
Ethyl acetate 500 grams
Graphite powder 500 grams
Wherein the prescription of fourth eyeball elastomeric compound is as follows:
Fourth eyeball-40 100 gram
5 yuan in zinc oxide
Stearic acid 0.5 gram
Captax 1 gram
Sulfur 2 grams
This electrically conductive composition has excellent water tolerance, weatherability, thermal endurance and anti-corrosion good, and higher adhesive strength is arranged, but the condition of cure more complicated needs heating and pressurizing to solidify.Condition of cure is: 3-5 atmospheric pressure, 60 ℃/6 hours.
Embodiment 12
The prescription of electrically conductive composition is as follows:
Phenolic resins 100 grams
Polyvinyl formal 125 grams
Benzene 480 grams
Ethanol 320 grams
Graphite powder 800 grams
This electrically conductive composition has toughness and shock resistance preferably.But thermal endurance, corrosion resistance is weaker.Condition of cure is 60 ℃/4 hours.
Embodiment 13
The prescription of electrically conductive composition is as follows:
Epoxy resin 150 grams
Furfuryl alcohol resin 30 grams
Phenolic resins 30 grams
25 milliliters of ethanol
Dibutyl phthalate 20 grams
Ethylenediamine 15 grams
Graphite powder 240 grams
This electrically conductive composition has good decay resistance.Condition of cure is 60 ℃/6 hours.
Embodiment 14
The prescription of electrically conductive composition is as follows:
Epoxy resin 33.3 grams
Phenolic resins 33.3 grams
Organic siliconresin 33.3 grams
Ethanol 20 grams
Ethylenediamine 6 grams
Ethyl-sulfate 3 grams
Graphite powder 100 grams
This electrically conductive composition has high temperature resistant, the characteristics corrosion-resistant, that glue-joint strength is high.Can adopt cold curing, be 7 days curing time; Also can adopt and be heating and curing.Earlier temperature is risen to 50-60 ℃ of constant temperature one hour when being heating and curing, slowly be raised to 180 ℃ again and kept 2 hours, must not surpass 200 ℃, then natural cooling.
Embodiment 15
The electrically conductive composition prescription is as follows:
Epoxy resin 150 grams
Dibutyl phthalate 30 grams
Furfuryl alcohol resin 30 grams
15 milliliters of ethanol
4.5 milliliters of methyl-silicone oils
Diethylenetriamine 18 grams
Graphite powder 200 grams
This electrically conductive composition has resistance to water and corrosion resistance preferably.Condition of cure: normal temperature cure 7 days or be heating and curing 120 ℃/4 hours.
Embodiment 16
The prescription of electrically conductive composition is as follows:
Epoxy resin 100 grams
Sebacic anhydride 50 grams
Polyacrylate 30 grams
Graphite powder 160 grams
This electrically conductive composition has high impact and bending strength, condition of cure after solidifying: 180 ℃/4 hours.
Embodiment 17
The prescription of electrically conductive composition is as follows:
Epoxy resin 100 grams
Dibutyl phthalate 20 grams
Copper powder 500 grams
Coupling agent KH-550 1.5 grams
Triethanolamine 20 grams
Condition of cure is 150 ℃/4 hours, and the electrically conductive composition after the curing has preferably that its resistivity of conductivity can reach 10
-8Below the Ω .CM.
Embodiment 18
The prescription of electrically conductive composition is as follows:
Epoxy resin 100 grams
Dibutyl phthalate 20 grams
Coupling agent KH-550 1.5 grams
Triethanolamine 20 grams
Zinc powder 600 grams
Condition of cure is 150 ℃/4 hours, and the electrically conductive composition after the curing has conductivity preferably, and its resistivity can reach 10
-8Below the Ω .CM.
Claims (11)
1, a kind of anti-corrosion electric conducting compound is characterized in that this electrically conductive composition mainly is made up of conductive powder material and adhesive, and the weight ratio of conductive powder material and adhesive is 0.5: 1 to 10: 1 part.
2, anti-corrosion electric conducting compound according to claim 1 is characterized in that described conductive powder material can be graphite, carbon ink, aluminium powder, zinc powder, copper powder and their mixture thereof.
3, anti-corrosion electric conducting compound according to claim 1 and 2 is characterized in that described adhesive can be adhesive made of synthetic resin, rubber based adhesives.
4, anti-corrosion electric conducting compound according to claim 1 and 2 is characterized in that it also contains the adhesive solidification agent.
5, anti-corrosion electric conducting compound according to claim 3 is characterized in that it also contains the adhesive solidification agent.
6, anti-corrosion electric conducting compound according to claim 1 and 2 is characterized in that it also contains adhesion agent modifier.
7, anti-corrosion electric conducting compound according to claim 3 is characterized in that it also contains adhesion agent modifier.
8, anti-corrosion electric conducting compound according to claim 4 is characterized in that it also contains adhesion agent modifier.
9, anti-corrosion electric conducting compound according to claim 5 is characterized in that it also contains adhesion agent modifier.
10, a kind of purposes of anti-corrosion electric conducting compound is characterized in that this anti-corrosion electric conducting compound is used to be coated in the grounded metal conductor, forms corrosion-resistant earthing conductor.
11, the purposes of anti-corrosion electric conducting compound according to claim 10 is characterized in that described grounded metal conductor can be copper, aluminium, steel, iron, high-silicon cast iron, magnet, galvanized steel, tin-coated steel, galvanized iron, tinplate, zinc-plated aluminium, zinc-plated aluminium, TC, tin-coated copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94103664 CN1109625A (en) | 1994-03-31 | 1994-03-31 | Anti-corrosion electric conducting compound and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94103664 CN1109625A (en) | 1994-03-31 | 1994-03-31 | Anti-corrosion electric conducting compound and its application |
Publications (1)
| Publication Number | Publication Date |
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| CN1109625A true CN1109625A (en) | 1995-10-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94103664 Pending CN1109625A (en) | 1994-03-31 | 1994-03-31 | Anti-corrosion electric conducting compound and its application |
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| CN (1) | CN1109625A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587992B (en) * | 2009-07-06 | 2010-12-29 | 周宏伟 | Method for enhancing preservative effect of lightning protection ground material |
| CN103396720A (en) * | 2013-08-22 | 2013-11-20 | 吴江市冰心文教用品有限公司 | Waterproof building pigment |
| CN103474130A (en) * | 2013-09-30 | 2013-12-25 | 胡钧峰 | Special nano grounding conductor and preparation method thereof |
| CN105500848A (en) * | 2015-12-14 | 2016-04-20 | 苏州市官田电子有限公司 | EMI gasket and high-efficiency production process thereof |
| CN105551662A (en) * | 2014-10-30 | 2016-05-04 | 国家电网公司 | Composite cable core |
| CN105609154A (en) * | 2014-10-30 | 2016-05-25 | 国家电网公司 | Composite power cable conductive core |
| CN113736349A (en) * | 2021-09-14 | 2021-12-03 | 安徽华辉塑业科技股份有限公司 | Corrosion-resistant epoxy resin coating and preparation method thereof |
-
1994
- 1994-03-31 CN CN 94103664 patent/CN1109625A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587992B (en) * | 2009-07-06 | 2010-12-29 | 周宏伟 | Method for enhancing preservative effect of lightning protection ground material |
| CN103396720A (en) * | 2013-08-22 | 2013-11-20 | 吴江市冰心文教用品有限公司 | Waterproof building pigment |
| CN103474130A (en) * | 2013-09-30 | 2013-12-25 | 胡钧峰 | Special nano grounding conductor and preparation method thereof |
| CN103474130B (en) * | 2013-09-30 | 2015-07-29 | 胡钧峰 | Preparation method of special nano grounding wire |
| CN105551662A (en) * | 2014-10-30 | 2016-05-04 | 国家电网公司 | Composite cable core |
| CN105609154A (en) * | 2014-10-30 | 2016-05-25 | 国家电网公司 | Composite power cable conductive core |
| CN105551662B (en) * | 2014-10-30 | 2017-08-15 | 国家电网公司 | A kind of compound cable core |
| CN105500848A (en) * | 2015-12-14 | 2016-04-20 | 苏州市官田电子有限公司 | EMI gasket and high-efficiency production process thereof |
| CN113736349A (en) * | 2021-09-14 | 2021-12-03 | 安徽华辉塑业科技股份有限公司 | Corrosion-resistant epoxy resin coating and preparation method thereof |
| CN113736349B (en) * | 2021-09-14 | 2022-05-17 | 安徽华辉塑业科技股份有限公司 | Corrosion-resistant epoxy resin coating and preparation method thereof |
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