CN1654711A - Metal member coated by anode sheath - Google Patents
Metal member coated by anode sheath Download PDFInfo
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- CN1654711A CN1654711A CN 200410030537 CN200410030537A CN1654711A CN 1654711 A CN1654711 A CN 1654711A CN 200410030537 CN200410030537 CN 200410030537 CN 200410030537 A CN200410030537 A CN 200410030537A CN 1654711 A CN1654711 A CN 1654711A
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Abstract
A sort of metal piece which is used to clad the anode layer, one deck or multiple of totally-enclosed anode layer and antiabrasion layer is clad on the surface of the metal piece, forms the nonporous shield protection and extremely effective cathodic protection, there is no medium IR dropping, no hydrogen separation and cathodic disbanding, no blind area from cathodic protection, no disturbance from the foreign stray current and the like abuses, the new shield protection and cathodic protection system where the integral electric potential is uniform and consistent, have a prominent non-corrodibility, can protect the metal piece from rusting at various damp environment, especially can be used to the long-term protection of the large-scale steel piece and other metal piece and their mass production, such as the long-term antisepticising and electrostatic prevention, the antisepticising of the oil gas water transport pipelines, the antisepticising of the large-scale steel structure, the mass-production of the corrosion resistant steels and the antisepticising of other large-scale metal piece. The present invention also can be used to the coated metal piece which needs to be reweld, when it is weld, the shielding of the weld joint can come back easily. The invention has a wide-ranging serviceability.
Description
The invention belongs to a kind of brand-new corrosion protection system, specifically adopt mull technique or compress method or extruding draw the method dialled with anode layer tight coating the in the whole totally-enclosed ground of metalwork, make it become a kind of corrosion resistant metalwork, in various moist physical environments, keep not corroding for a long time.
In modern society; corrosion of metal is a serious problems, and the etching problem of especially large-scale steel part is even more serious, and common protective layer only possesses function of shielding; the damage of protective layer is difficult to avoid in the life-time service process, therefore can not prevent the generation of metallic corrosion long-term effectively.In the medium-term and long-term large-scale steel part of using of moist physical environment such as seawater, fresh water or soil, the current long life anti corrosion measure in countries in the world at present is that galvanic protection adds organic coating shielding duplicate protection method.Facts have proved and take this measure to rely on the organic coating shielding much effective than simple, but the shortcoming that this method also exists some to be difficult to overcome.For iron and steel; effectively cathodic protection potential should not be higher than-0.85mV (CSE) (CSE is meant the current potential with respect to the copper/saturated copper sulphate reference electrode); the annode area that conventional galvanic protection is adopted is than the area of protected steel part (negative electrode) much smaller (belonging to the big cathode systems of primary anode); there are very big difference in the cathodic protection potential at its each position and protective current; nearly anode spot is in the overprotection potential state; away from anode spot place protection potential deficiency; in order to ensure also being effectively protected away from the anodic position; often applied negative current potential; being used for overcoming the caused volts lost of resistance of medium, the negative potential that therefore applies often reaches-and 1400mV is to-1500mV (CSE).Hydrogen just began to separate out when in fact potential drop was to-1170mV (CSE); the deposition potential of hydrogen corrigendum in depth of soils anoxic condition or acid soil; therefore conventional galvanic protection; liberation of hydrogen almost is inevitable; this has just aggravated the tendency (cathodic disbonding) that coating is peeled off from base material, and because liberation of hydrogen has increased the danger of potential hydrogen embrittlement and stress corrosion.In addition to the steel part in the soil that is in the semi-wet state; normal because the discontinuous effect that does not have galvanic protection of conducting medium; for complex-shaped member or because the influence of screen layer; often there is the inaccessible dead band of some cathodic protection currents; the corrosion at these positions can't be avoided, and also often disturbs and destroy the effect of conventional galvanic protection in addition under water from external stray current underground or.
Steel part adopts hot dip aluminum plating; galvanizing or hot dip aluminum plating zinc alloy (or aluminium zinc or siliceous; the aluminium zinc of elements such as magnesium) protection; have galvanic protection and shielding protection dual-use function equally; and can avoid the existing defective of above-mentioned conventional galvanic protection fully; there was not negative current potential in it; the problem that does not exist liberation of hydrogen to bring; there is not the inaccessible dead band of cathodic protection current; be not subjected to the influence of external stray current yet; because steel part is used as the coating integral body of sacrificing positive pole and tightly coats and be enclosed in the inside; stop and shielded the interference of external stray current; therefore the protection effect brilliance obtains the generally approval of protection against corrosion scientific and technological circle.The subject matter that hot dip aluminum plating (zinc) technology exists is to be subjected to the restriction of dimension of tank to be difficult to the oversize steel part of plating, form the performance that brittle ferro-aluminum compound or other brittle intermetallic compounds influence steel in addition during hot dip process on coating and steel interface easily, this has increased difficulty to coating technology.In order to adapt to the protection needs of large-scale steel part; adopt hot spray painted zinc (or aluminium) coating; it also can play the effect of galvanic protection and shielding protection; but there is hole in hot spray painted zinc (or aluminium); its protection effect is less than galvanizing (or aluminium); and cost is also higher; what therefore application at present was more is rich zinc (or the rich aluminium) coating that applies organic or inorganic; this type coating is to adopt the organic or inorganic binding agent that zinc powder (or aluminium powder) is bonded together formed coating; its galvanic protection effect; except the negative potential that relies on zinc and aluminium; also depend on conductivity and its stability to a great extent; this is because binding agent is nonconducting basically, relies on zinc powder (or aluminium powder) particle to link mutually and conduct electricity, so the content of zinc powder (or aluminium powder) is necessary abundant in the coating.The WZL coating quality inspecting standard HB5364-86 that is worked out by China's Ministry of Aviation with reference to USS has stipulated that the resistance value between inorganic rich aluminum coating and coated substrate surface is not more than 15 Ω.Inorganic aluminum coating by this type of U.S.'s patent of invention (patent No. 3248251) has been used nearly 40 years at the countries in the world airline; facts have proved its galvanic protection and anticorrosion ability brilliance for iron and steel; its performance is considerably beyond general organic or inorganic zinc-rich coating; so its Corrosion Protection is good, coating resistance is one of the main reasons for a short time.Existing organic or inorganic zinc-rich coating, the resistance of actual its coating of test is often greater than 10
5Ω (the zinc rich primer standard HG/T3668-2000 that China the Ministry of Chemical Industry works out does not have technical requirements to the resistance of coating); because coating resistance is big; it only limits to work near the zinc powder at coating damage place to the galvanic protection of steel; from coating damage place zinc powder far away slightly; because resistance does not have the galvanic protection effect greatly; therefore the area of sacrificing positive pole is less; anodic current density is higher relatively; the loss of partial anode sacrifice property is just bigger; thereby reduced etch-proof effect; this shows the quality of rich zinc or rich aluminum coating conductivity, is the important factor that influences galvanic protection.The inorganic aluminum coating of U.S.'s invention, the method that improves its electroconductibility is to spray granulated glass sphere after adopt solidifying again aluminium powder is flattened to be communicated with or to increase temperature (about 550 ℃) again to make in the coating each component react to each other diffusion and conducting, thereby the resistance of coating is very little, but this Technology difficulty is very big, the coating cost is also very high, thereby has limited its use range (only limiting to use at various countries' airline).
Chinese patent 981120606.5 and 02118248.5 has all proposed the method by extruding or drawing, with aluminum or aluminum alloy cladding wires or this class ferrous materials of tubing, thereby improves electroconductibility, solidity to corrosion and wearability.The technical scheme that proposes in above-mentioned file has all been utilized superior corrosion-resistant, shielding of aluminium self and performance such as ageing-resistant; iron and steel is played tight shielding effect; stop the erosion of external agency to iron and steel; but to only depend on shielding be far from being enough for having spoken of in detail in the medium-term and long-term large-scale steel part front of using of wet environment; above-mentioned several iron and steel alclad technology do not possess the galvanic protection function.Though the standard potential of aluminium is-1660mV (SHE) (SHE is meant the electropotential with respect to standard hydrogen electrode); but aluminium is very easily oxidation (or passivation) in physical environment; generate the oxide film (or claiming the self-passivation film) of one deck densification; it is approaching to cause its electropotential to rise to iron, thereby weakens or lose galvanic protection function to iron and steel.According to current in the world criteria for cathodic protection; to the effective cathodic polarization value of iron and steel be-100mV; in order to accomplish this point; coating layer as sacrificial anode; its electropotential is at least than the negative 110mV of matrix steel; preferably negative 140-400mV; and several alclad technical scheme recited above does not all limit the electropotential of aluminium (or aluminium alloy) layer material therefor; particularly for copper bearing aluminium alloy or industrial aluminum (for improve mechanical property and electroconductibility be everlasting add copper in the aluminium); the more polarization of its electropotential; when there is the copper of sosoloid form in aluminium alloy, containing 5%NaCl and 0.3%H
2O
2The aqueous solution in measure its electropotential increasing and raise with copper content; its rate of rise is+47mV/wt%, so the existence of copper makes aluminium forfeiture galvanic protection function, when copper appears in the alloy with independent additional phase; the electropotential of this phase be on the occasion of; reach+50-+200mV,, form the corrosion microbattery than the high 570-720mV of aluminium; impel aluminium corrosion and matrix steel corrosion; Chang Hantie in the industry aluminum or aluminum alloy, iron also can make aluminium alloy rising electropotential, and increasing degree is a little less than copper.The technical scheme of above-mentioned these aluminium Composite Iron And Steel is not all recognized this point, and copper in the aluminium coating layer and iron level are not added restriction, therefore can't provide long-effective protection to the medium-term and long-term large-scale steel part of using of wet environment.
Anti-with copper, iron phase, in aluminum or aluminum alloy, to add zinc, magnesium or other metals and can reduce its electropotential, the range of decrease of wherein adding zinc rear electrode current potential is-63mV/wt% therefore to increase substantially the galvanic protection function of aluminium alloy.But usually can increase the hardness and the fragility of aluminum or aluminum alloy behind adding zinc or the magnesium, reduce unit elongation significantly, therefore be difficult to utilize it by pushing the method Cladding Steel ironware of drawing.
Non-ferrous metal paper tinsels such as employing aluminium, copper or nickel have been proposed as protective layer in Chinese patent 91110887.4; coat household appliances by bonding method; conditioner casing or steel door and window; improve the decorative effect and the barrier propterty of product; but also the technical scheme with aforementioned aluminium plated steel ironware is the same; only possess function of shielding, do not have to solve galvanic protection problem large-scale steel part.
Type materials such as aldural that some performances are fabulous and high-strength magnesium alloy continue to bring out in recent years, but the protection against corrosion problem is not resolved, and have therefore limited their range of application.
In addition for the large-scale metalwork that after coating protective layer, needs to carry out site welding again, above-mentioned various protective layers all are difficult to fast, economical, recover the protection function that weld has been lost effectively, this also is the technical barrier of needs solution.
Above-mentioned is guard technology and the present situation of relevant protective layer and the problem of existence of existing steel part or other large-scale metalworks.
Purpose of the present invention is exactly to overcome various shortcomings and the difficulty that above-mentioned prior art exists; create a kind of the have remarkable galvanic protection and the new technology of shielding protection dual-use function; avoid conventional galvanic protection because protection potential and protective current that the big negative electrode of primary anode is brought are unbalanced; exist protection less than dead band and the hidden danger brought of liberation of hydrogen and shortcoming such as be subjected to that easily external stray current is hindered and damaged; avoid zinc-rich coating because resistance is big; the defective of galvanic protection insufficiency of function; avoid existing inorganic rich aluminum coating and hot-spraying techniques Technology difficulty big; shortcomings such as cost height; overcome the shortcoming that existing iron and steel alclad technology does not possess the galvanic protection function, solve large-scale iron and steel or other hardwares are difficult for recovering protection after site welding a difficult problem.Create the anticorrosive metal new technology of a kind of efficient, economy, high-quality, practical simplicity, can reach as iron and steel hot dip aluminum plating zinc alloy extremely remarkable Corrosion Protection, can avoid again that its exists can not the large-scale steel part of plating and be easy to generate shortcoming such as brittle intermetallic compound.
Have now found that and in aluminium or zinc or magnesium and its his alloy, add the protective layer of the made electronegative metal material of specific on a small quantity element as steel part or other metalworks; both had and met the required negative potential of galvanic protection; possess fabulous unit elongation and proper mechanical capacity again; so just can come Cladding Steel ironware or other large-scale metalworks or be pressed into metal film of lower potential (or paper tinsel) with this electronegative metal material by the method for extruding or drawing; the whole totally-enclosed ground, surface that the method that adopts binding agent or compress need be protected one or more layers metal film of lower potential to metalwork as anode layer closely coats; form imporous shielding protection; do not exist medium IR to fall; there are not liberation of hydrogen and cathodic disbonding; there is not the galvanic protection dead band; there is not drawbacks such as being subjected to external stray current interference; a kind of brand-new shielding protection and the galvanic protection system of whole current potential uniformity; thereby obtain remarkable anticorrosion ability, reach purpose of the present invention.
Technical scheme of the present invention is as follows:
In existing aluminum or aluminum alloy or zinc or zinc alloy, add and to change its electropotential on a small quantity, again can the fining metal tissue, improve the element of ductility or other mechanical propertys, these elements are selected from and are added with gallium, zinc, silicon, magnesium, mercury, indium, tin, cadmium, aluminium, manganese, titanium, carbon, nickel, bismuth, plumbous, calcium, beryllium, lithium, antimony, strontium, scandium, zirconium, vanadium, chromium, molybdenum, phosphorus, boron, germanium, a kind of in rare earth metal or other elements or several, different demands according to different use occasions, the kind and the quantity of the element that select to add, also can adopt copper content be not more than 0.1% and iron-holder be not more than 0.7% aluminum or aluminum alloy.In some occasion that needs more negative electropotential, suitable above-mentioned element makes an addition to magnesium or magnesium alloy can to choose minority, obtains needed performance.The anode layer made from above-mentioned various electronegative metals material; its chemical property must be that the electropotential in various moist physical environments is born 110mV at least than the electropotential of the steel part that needs protection under the similarity condition or other metalworks; preferable range is negative 140～400mV preferably; also can be more negative; but do not surpass negative 600mV; but except the protection magnesium alloy; the electropotential of anode layer should be than the deposition potential of hydrogen under the similarity condition just; so just can accomplish in various moist physical environments; when anode layer or metal film of lower potential suffer that crackle or slit appear in damage; the cathodic polarization value of the metal base that the place, slit is exposed is at least-100mV; there are not simultaneously liberation of hydrogen and cathodic disbonding phenomenon again; thereby realize more effective galvanic protection, prevent iron and steel or other metallic corrosion.Described various moist physical environment is meant at physical environments such as fresh water, rainwater, river, seawater, soil, moist atmosphere or industrial atmospheres.This electronegative metal material is not higher than at 25 ℃ fresh water or the electropotential in the neutral medium-830mV (CSE) preferably scope be-850mV～-1120mV (CSE); also can be more negative; but negative value surpasses-and during 1170mV (CSE), hydrogen just begins to separate out, and causes that easily protective layer peels off.This electronegative metal material unit elongation under the room temperature when as-annealed condition is not less than 30%, and other mechanical propertys of this material are decided according to different needs.
Adopt above-mentioned electronegative metal material by the conventional extruding or the method for drawing; directly coat various tubing; the steel part of bar or other prismatic metallic substance or simple shape or other metalworks; thereby obtain fabulous galvanic protection and shielding protection double effects; perhaps as making conventional aluminium foil, be pressed into metal film of lower potential (paper tinsel) and improve its surface adhesion and protective or extinction effect by mechanical property and various surface treatment method that various different heat treatment methods are improved above-mentioned various metallic membranes; adopt the mull technique or the method that compresses with one or more layers this metal film of lower potential as anode layer during with its clad metal spare on the surface of metalwork or the surface of metal film of lower potential or surface both scribble binding agent or coating adhesive or be partially coated with binding agent not; dependence be added in the metal film of lower potential surface by the non-metallic material manufacturing or adopt electropotential in moist physical environment cover or heat shrink sleeve or winding boundary belt or make metal film of lower potential and the tight pressing of metalwork than the fixing sleeve of the electronegative metal material manufacturing of the negative at least 110mV of electropotential of the steel part under the similarity condition or other metalworks or in expanding with mechanical presses or manual extruding or air pressure or hydraulic pressure or other compressing methods; and make the resistance value between every layer of metallic membrane and the protected metalwork be not more than 1 Ω, thereby make metalwork obtain galvanic protection and shielding protection.
The present invention also finds to apply one or more layers again to the electrolyte ion conducting and do not cause that anode passivation maybe can eliminate the ionic conduction active layer that passivation has corrosion inhibitive function again at the internal surface of above-mentioned metal film of lower potential or outside surface or surfaces externally and internally; just can bring into play the galvanic protection function of protective layer better; because at this moment the local surfaces of the base material that the whole continuous surface of the electronegative metal protective layer (or film) that is covered by the ionic conduction active layer and protective layer breakage are exposed forms the little cathode systems of big anode; even the electropotential of the electronegative metal protective layer (or film) that is adopted is defeated by the electropotential (for example only negative 105mV) on bare substrate surface slightly; also can keep the cathodic polarization value of base material to reach-100mV, reach effective protection.Because annode area is very big; anodic current density is minimum; therefore anode is difficult for the rising current potential owing to polarize; and negative electrode is because area is little; current density is very big; cathodic polarization is abundant; corrosion just stops; can adopt silicate; poly silicate; polyphosphoric acid salt; ion exchange resin; ion-exchange membrane and other various inorganic or organic materialss to the conducting of electrolyte ion energy are made the ionic conduction active layer; in the ionic conduction active layer, also can add the various ionic conduction type inhibiter of anode self-passivation that do not cause and improve anticorrosion ability; when adopting the very negative material of electropotential as the protective layer of metalwork; can adopt various inhibiter to replace above-mentioned ionic conduction active layer, obtain more suitable anticorrosion ability the conducting of electrolyte ion energy.
It is the thermoplasticity or the thermosetting adhesive of raw material that described binding agent adopts various synthetic resins or natural resin, also can adopt the synthetics that is added with various additive agent modified thermoplasticity or thermosetting resin, several resins, hot melt adhesive, mineral binder bond, modified inorganic binding agent, the mineral binder bond of organism modification, mineral-modified organic binder bond, the binding agent between organism and inorganics, for example tetraethyl silicate belongs to organism, but becomes inorganic polymer after its hydrolysis.Can add inhibiter in the binding agent, be used for improving Corrosion Protection.Applied pressure will be enough to make anode layer or metal film of lower potential and metalwork conducting during bonding, makes resistance between the two be not more than 1 Ω, is preferably less than 1 Ω, and resistance is healed better little.The above-mentioned various binding agent of forming by organism or inorganics, most resistance are all bigger, therefore after with them anode layer or metal film of lower potential being pasted on the metalwork surface, resistance therebetween is also bigger, but anode layer or metal film of lower potential self are excellence conductors, whole rete integral body is conducting, this and zinc-rich coating have the difference of essence, as long as rete is a successive, along with the increase that coats area, resistance value between rete and the quilt metalwork that coats can reduce gradually, and for example 1 square centimeter continuous anode layer adheres to metalwork of the same area surface, and resistance value therebetween is about 10
5-10
6Ω, with same binding agent same anode layer is adhered to the metalwork surface, when the continuous enlarged areas to 10 of rete square metre, resistance value therebetween just can be reduced to below 10 Ω, the resistive technologies index (15 Ω) of the inorganic aluminum coating of this and Ministry of Aviation standard code is in the same order of magnitude, and the resistance value between whole rete and each position of metalwork all equates.This point can't be accomplished existing zinc-rich coating; because the conducting between zinc-rich coating and the steel part is the local conducting on zinc powder and steel part surface; the present invention then is whole conducting; therefore as long as successive anode layer or metal film of lower potential coat the enough big large-scale hardware of area; resistance value between this rete and the protected metalwork can be fallen very lowly; resistance well below general zinc-rich coating; also can be lower than the resistance value (15 Ω) of inorganic rich aluminum coating; even can reach the same little resistance with hot dip aluminum plating zinc; therefore except owing to be subjected to the stable on heating restriction of binding agent; its thermotolerance is less than outside the hot dip aluminum plating zinc, and other barrier propterty is not less than hot dip aluminum plating zinc fully.In order to reduce anode layer or metal film of lower potential and also can be adopted the machine riveting way or connect the metalwork conducting that conducting connecting part is coated anode layer or metal film of lower potential and quilt by the resistance value between the metalwork that coats, make resistance value therebetween be not more than 1 Ω or littler, should be when adopting this way to conduct electricity with all fastening pieces that contacts or expose with metal film of lower potential, the pad of fastening usefulness or conducting connecting part, all adopt electronegative metal above-mentioned material to make, or it is for example zinc-plated to adopt the electrode plating current potential not to be higher than the plating piece of electropotential of above-mentioned this class electronegative metal, cadmium plating, aluminize, or the steel of plate golding aluminium zinc alloy or insulating material making, all electropotentials metal of being used for conductive communication more positive than metalwork all must tightly seal with insulant.
Suitable mineral binder bond also can adopt, and makes the metalwork that coats metal film of lower potential can stand higher use temperature.Can adopt the conductive adhesive of intrinsically conducting binding agent or other types to paste above-mentioned metal film of lower potential and steel part.When adopting the mixed type conductive adhesive, the electropotential of the conductive particle of its fusion must be defeated by iron, for example adopts binding agent, the binding agent that is added with aluminium powder (or Al alloy powder), the binding agent that is added with magnesium powder (or magnesium alloy powder) that is added with zinc powder (or Zinc alloy powder), the binding agent that is added with other electronegativity conductive powders.After in binding agent, adding the zinc powder or aluminium powder or magnesium powder of q.s; just be equivalent between anode layer and metalwork, increase the rich zinc of one deck or rich aluminium or rich magnesium coating; different is these rich zinc or rich aluminium or rich magnesium coating by anode layer electroconductibility and produce the effect of whole conducting, thereby its galvanic protection function increases.Also can apply rich zinc of one deck organic or inorganic or rich aluminum coating as a same reason in the appearance of anode layer or metal film of lower potential again, to improve whole barrier propterty.Should remove oxide film, corrosion or other insulants and oil stain, paint film or the dirt on steel part or other metalwork surfaces before stickup anode layer or the metal film of lower potential as far as possible.For large-scale steel part or other metalworks, the surface keeps the firm oxide film of one deck does not influence quality product, as long as the resistance value that coats between back anode layer and the metalwork is enough little.But must remove for loosening oxide film, otherwise can influence sticking power between metalwork and the anode layer.Metal film of lower potential should adopt the good material of ductility, for example material of annealed processing as far as possible.Preferably adopt not solvent-laden binding agent, but also can adopt solvent-laden binding agent, this adhesive coated behind anode layer and metalwork surface, must be treated that solvent evaporates could be bonding after intact.That exerts pressure when bonding neglects the resistance value between metallic membrane and the steel part greatly and decides, and for the big metalwork of size, applying its resistance value of same pressure can be littler.Can adopt the way that preheats and then fit, also can adopt the back reheat of fitting, perhaps heat pressurizing attaching simultaneously, select the mode of heating and pressurizing attaching to make anode layer and metalwork bonding according to different situations, the temperature and time of heating is decided on the characteristic of different tackiness agents and the method for heating, and the binding agent of ambient cure only pressurizes and do not heat.Can adopt the method for various heating, for example resistive heating, far-infrared heating, hot blast heating, LASER HEATING, ratio-frequency heating, heating in medium frequency or low frequency induction heating, contact heating, ultrasonic wave heating or the like.Should reserve with the anode layer of the same length in weld (comprising welded heat affecting zone) for the metalwork of needs welding and not fit in advance, fit again after to be welded the finishing, the internal surface of the anode layer at these positions, there is one deck to apply in advance and removed the binding agent that desolvates or coating adhesive not in advance, welding finish bonding before, coating adhesive carries out bonding again, or coating adhesive does not adopt the method for extruding that it is fitted, and the anode layer at this position and the resistance value between the metalwork should be not more than 1 Ω after the applying.Also can take to coat for the metalwork of needs welding and compress and tight these positions of fitting at the metal chuck that the weld of metalwork and welded heat affecting zone adopt the steel shape of doing and the metalwork that is coated of above-mentioned electronegative metal material or zinc-plated (or cadmium plating or aluminize or plate golding aluminium zinc alloy) to match; the metal chuck is directly contacted with metalwork and conducting or by be sandwiched in therebetween anode layer and with the metalwork conducting; and make the resistance between metal chuck and the metalwork be not more than 1 Ω; thereby make the weld of metalwork and welded heat affecting zone obtain galvanic protection and shielding protection (seeing Figure 14); also can be adopted above-mentioned metal clip cover to protect for protective layer after welding by the position of scaling loss; all the other positions of steel part adopt member coated by anode sheath or other protective layers to protect.
For improving protective or, can increasing the external protection of one or more layers organic or inorganic again, comprise coating layer, enhancement layer or coating at the outermost of above-mentioned anode layer or metal film of lower potential in order to prevent the physical abuse metallic membrane.Can make such protective layer in advance, also can after anode layer or metal film of lower potential fit to the metalwork surface, coat or apply such external protection again.Can be by different needs coating adhesive again before applying one or more layers binding agent or be not coated with use in advance in advance as the internal surface of the metal film of lower potential of anode layer or outside surface or surfaces externally and internally; or make metal film of lower potential surface obtain the chemical rete that one deck improves adhesive power or protective by above-mentioned surface treatment method; making film that above-mentioned external protection (or not adding external protection) will make like this simultaneously is rolled into standby or sell as the starting material of Cladding Steel ironware or other metalworks; the big more resistance of pasting between back and the protected metalwork of the area of metal film of lower potential is more little, so the single face total area of metal film of lower potential should be not less than 10 square metres.
The present invention can form a kind of accurately check easily; do not exist the medium IR that is difficult in the conventional galvanic protection grasp to fall changing factor; can monitor, can regulate, cathodic protection potential is stable; there are not drawbacks such as liberation of hydrogen or cathodic disbonding, and can protect and the shielding protection system a kind of like this dependable performance of the long distance detection of large-scale galvanic protection, convenient and practical novel cathode at monitoring station.Set up such system; the scheme of introducing previously should be done some changes a little; at first the whole surface of the metalwork that will protect coats a layer thickness and is not more than the insulating protective layer of 5mm (the thickness size is decided with the insulating property of selected insulation layer; when the insulating property of insulation layer are fine; its thickness of attenuate of should trying one's best); surface in insulation protection coats one or more layers anode layer again; whole anode layer is insulated the several portions that thing is divided into mutually insulated; pass through conducting connecting part again; lead; testing instrument such as trip switch and reometer is communicated with; and be communicated with protected metalwork, see Figure 15.According to the variation of cathodic protection current or cathodic protection potential, by the disconnecting of trip switch, the segmentation analysis finds that in time cathodic protection current increases the position of (or variation of cathodic protection potential) place section, in time takes to remedy measure.
In above-mentioned cathodic protection system; when anode layer is excellent; electric current between negative electrode (referring to protected metallic matrix) and the anode layer is practically negligible; increase this electric current along with anode layer is damaged and also increase thereupon,, is communicated with well between protected metalwork and the anode layer because do not exist the IR of medium to fall basically; intermetallic IR falls also near zero; even exist some intermetallic IR to fall at remote position, but this also is an indeclinable fixed value, grasps easily.Again owing to be the little cathode systems of big anode; anode polarizes hardly; therefore different fully with conventional galvanic protection; all changing factors that are difficult to grasp have been got rid of; the variation of the size of current between the anode and cathode, directly significant reaction goes out the situation that anode layer is damaged or shielding is leaked, and cuts by the trip switch segmentation; just can find the position at the damaged place of anode layer easily accurately, in time adopt remedial measures.
Also can adopt the method for measuring potential variation between the anode and cathode to monitor, in above-mentioned cathodic protection system
E=| Δ E
K|+| Δ E
A|+IR
Be situated between+ IR
Gold
Electromotive force in the R-cathodic protection system, the just potential difference between negative electrode and anode during open-circuit condition
| Δ E
K| the absolute value of-cathodic polarization potential
| Δ E
A| the absolute value of-anodic polarization current potential
IR
Be situated betweenThe volts lost that-resistance of medium causes
IR
GoldThe volts lost of-metallic circuit system
Because conduction connects good, the little IR of metallic circuit resistance
Gold≈ 0
Because anode layer closely coats base material, the insulation layer of midfeather is very thin, and distance is minimum between the anode and cathode, so so also minimum IR of resistance of medium
Be situated between≈ 0
Owing to be the little cathode systems of big anode, anodic current density is minimum, and anode does not almost have the polarization phenomenon,
Therefore | Δ E
A| ≈ 0
This shows | Δ E
K| ≈ E
That is to say that the cathodic polarization value in this system almost just equals electromotive force; just no better than during open-circuit condition; potential difference between anode layer and the protected metalwork; in this sense; this is a kind of galvanic protection system that is in perfect condition, and the sacrifice metal that the energy that is applied is consumed in other words is all as useful work (being the cathodic polarization value), Just because of this; electronegative metal materials consumption with the effect anode layer is very slow, thereby realizes long-lasting protection.
Just because | Δ E
K| ≈ E, change so also just can measure the potential difference of system in monitoring station, thereby the anticathode securing system is monitored.
In said system, meet a measuring resistance R
X, said system
E=| Δ E
K|+| Δ E
A|+IR
Be situated between+ IR
Gold+ IR
X
∵ | Δ E
A| ≈ 0 IR
Be situated between≈ 0 IR
Gold≈ 0
∴E≈|ΔE
K|+IR
K
Wherein | Δ E
K| IR is directly proportional with current density
XBe directly proportional with strength of current, therefore, measure IR along with the size of damaged area of anode or shielding leak condition
XVariation, also can judge the damage or the leakiness of anode layer, by trip switch segmentation cutting, also just can accurately find anode layer to damage the position at place.
Above-mentioned controlled galvanic protection system also can be formed the comprehensive sky of transferring in conjunction with the external dc power supply galvanic protection, just regulatable constant potential direct supply of serial connection in system.When cathodic protection potential is enough in the system; additional power source needn't apply negative potential; even the reverse negative potential that reduces; when cathodic protection potential in the system is not enough; additional power source compensates negative potential automatically; when taking this system, can adopt general aluminium foil (thin aluminum sheet) or alloy foil (or thin plate) also can adopt non-sacrifice tinsel (or thin plate) but had better not adopt the too negative metal of current potential as anode layer.In this system, the energy that external source applied is minimum, and the negative potential of increase is also minimum, therefore needn't worry to increase the loss of aluminium foil, and it is different from conventional galvanic protection fully, in conventional galvanic protection system
E=| Δ E
K|+| Δ E
A|+IR
Be situated between+ IR
Gold
Δ E
ABe far longer than Δ E
K(because being big negative electrode primary anode)
IR
Be situated betweenAlso very big, particularly away from anodic position IR
Be situated betweenIt is bigger,
IR
GoldIn the sacrificial anode system, increase, in the additional power source cathodic protection system, comprised the bigger volts lost of power supply itself along with increasing of corrosion product.
Therefore | Δ E
K| this useful work only accounts for the minimum part of electromotive force, and estimation may so sacrificial anode consumption is fast, add in the power-supply system outside less than 5%, though the electric energy cost that consumes is not high, the factor of many variations makes this system be difficult to monitoring and regulation and control.
This shows that cathodic protection system provided by the present invention compares with conventional galvanic protection, very significant superiority is arranged.
Above-mentioned controlled galvanic protection system is to provide cathodic protection current by electronegative metal material or external direct current power supply or both actings in conjunction; by just regulating the control anode potential than the deposition potential of hydrogen under the similarity condition; than the negative at least 110mV of the electropotential of protected metalwork; for the protection electropotential of this anode layer of steel part in fresh water or neutral medium be controlled at-850mV (CSE) is between-the 1120mV (CSE); when anode layer is damaged; crackle or slit occur, the cathodic polarization value of the metal base that the place, slit is exposed is at least-100mV.
According to the metalwork of above-mentioned the whole bag of tricks member coated by anode sheath, in salt fog cabinet or soak and do not occur iron rust under the brinish condition more than 10000 hours.
Superiority of the present invention once and effect are discussed below:
The present invention discussed in front with the superiority that hot dip aluminum plating zinc is compared, and did some with the galvanic protection of the organic coating of using always at present (various lacquer), hot spray painted zinc (or aluminium), organic or inorganic zinc-rich coating and routine emphatically below and analyzed relatively.
Because anode layer of the present invention or metal film of lower potential are imporous continuous retes, its shielding properties beats by miles conventional coating, existing various organic or inorganic coating all has hole, there are hole too in hot spray painted zinc (or aluminium) and zinc-rich coating, thus its shielding properties of the metal film of lower potential of thinner thickness considerably beyond thickness than its thick conventional coating.
Because anode layer of the present invention or metal film of lower potential be uv reflectance or other radiation effectively; can isolate oxygen effectively by the utmost point; thereby it also the utmost point protected tack coat below the rete effectively, so the ageing resistance of protective film beats by miles various organic coatings.
Because anode layer or metal film of lower potential are good conductors; resistance is minimum; preferred negative potential current potential is arranged again; therefore its galvanic protection function surpasses various rich zinc; rich aluminum coating; when protective membrane is damaged; the local surfaces of the base material that injury region comes out is little negative electrode; whole anode layer or electronegative metal rete under moisture film covers continuously are big anodes; it can protect the substrate surface that comes out by the utmost point effectively; make it rust not occur; owing to be the little negative electrode of big anode; the anodic current density is minimum; has only unconspicuous slight and uniform sacrifice property corrosion product on the anode layer surface; thereby the protection life-span of anode layer is very long; and negative electrode is because area is little; cathode current density is big; negative electrode is fully polarized; the spontaneous corrosion of base material also just stops; and general zinc-rich coating is big owing to resistance, carves when coating and has only the effect that just has sacrificial anode near the rich zinc layer at damaged position when breaking, and coating far away is because the big cause of resistance can not provide galvanic protection to damaged position; by contrast; annode area is much smaller, and the anodic corrosion electric current density is higher relatively, therefore protects the life-span also shorter.
Adopt the steel test piece of the coating metal film of lower potential of aforesaid method making, keep the resistance value between metallic membrane and steel substrate to be not more than 1 Ω by conductive attachment point, and peel off coating layer by diameter 10mm in the centre of test piece, at salt fog or soak the brinish condition and iron rust do not occur more than next week.
Compare with heat is aluminium-plated; except the front mentioned function of shielding of the present invention be better than heat aluminium-plated; it is aluminium-plated that galvanic protection function of the present invention also is better than heat; this is because hot aluminium-plated spraying process is to be formed by the cohesion of melt metal drop; though in agglomeration process, metallurgical binding is arranged also but also has mechanical snap; hole is arranged between the coating particles; and resistance is bigger; oxidation or passivation phenomenon appear in particle surface easily in spraying process; therefore its electropotential can be higher than iron in some environment, thereby loses the galvanic protection function.Electronegative metal of the present invention material has preferred cathodic protection potential, adds and is the little galvanic protection system of big anode, and anodic current density is minimum, can therefore can not lose the galvanic protection function owing to anodic polarization improves electropotential.
The present invention compares with conventional galvanic protection; because anode layer of the present invention or metal film of lower potential are with the whole complete the inside that is coated on closely of steel part that needs protection; both areas equate; integral body is evenly protected; its cathodic protection potential is even constant; by electrochemical process; the local substrate surface that has only the rete breakage to come out is only negative electrode; anode layer or metal film of lower potential under whole continuous moisture film covers then are anodes; so be the little cathode systems of big anode, cathode current density is big, cathodic polarization is abundant; the big negative electrode primary anode system of the galvanic protection of galvanic protection works very well and routine is opposite.Therefore the present invention can avoid the existing cathodic protection potential of conventional galvanic protection and cathodic protection current inhomogeneous fully; local overprotection is separated out hydrogen and is caused that coated cathode peels off; and there is a potentially dangerous of hydrogen embrittlement and stress corrosion; the localised protection undercurrent exists protection dead band and defectives such as influence underground, external stray current under water.
The present invention is practical, for the better simply material of shape for example tubing, bar and other prismatic metallic substance, sophisticated extruding or drawing technique that can be routinely adopt above-mentioned electronegative metal material to finish coating to steel on the streamline operration of factory.For example coat tubing; can in advance the electronegative metal material also be made tubular casing (or plug) (or interior) table outside tubing; push again or drawing; make the electronegative metal be close to steel surface; thereby obtain fabulous Corrosion Protection; position for the needs welding; can protect according to the shape of the top way employing electronegative metal material making of having pointed out and the chuck that steel match; or give and reserve these positions; do not push (or drawing) in advance; to be welded finishing, restock extruding (or drawing) fits tightly these positions and steel.
For various large-scale steel part, large-scale metalwork or the metalwork that is not easy to adopt the extruding Hubbing method to coat, then adopt metal film of lower potential, coat by bonding and the method that compresses.At present very ripe based on film (aluminium foil) production technology of aluminium alloy, change the aluminum alloy films component, producing better metal film of lower potential realizes than being easier to, easier from the alloy firm that technical difficulty research is new than the component that changes hot dip aluminum plating zinc, because latter's influence factor is more, in the hot dip process process, liquid metal and the complicated reaction process of iron and steel existence such as aluminium, influence the performance of steel easily, the former is much then simple, can not influence the physicals of steel.From binding agent, continue to bring out new quality variety, adopt high performance tackiness agent can improve performance of the present invention and range of application, so the present invention have vast potential for future development.
Be difficult to the barrier propterty at the damaged position of recovery and protection layer in addition for the metalwork additive method that needs site welding or cutting behind the coating protective layer again, adopt the present invention then can recover its barrier propterty very simple and effectively.
Electronegative metal of the present invention material price is cheap; the production efficiency height; can be in advance on the processing line in factory with metal film of lower potential; once finish internal surface coating adhesive and outside surface and coat the external protection that shields with decoration function; also can on the factory work line, finish the operation of Cladding Steel ironware or other metalworks; need repeatedly to apply with general applying coating, need several days time just can finish application and compare, production efficiency is much higher.Owing to be operation in the factory, not influenced by weather and human factor, quality product also guarantees easily.Adopt the present invention to protect large-scale steel part or other large-scale metalworks than the more economical practicality of additive method.The present invention is specially adapted to coat large-scale steel part long life anti corrosion and production in enormous quantities, the for example production in enormous quantities of the long life anti corrosion of Large Storage Tanks oil tank and anti-electrostatic and protection against corrosion steel pipe or rail, common japanning will give out a large amount of organic solvents, contaminate environment, infringement workers ' health.Adopt the extruding drawing or adopt solvent-free binding agent method of attaching to coat by the present invention, can eliminate this drawback fully.
Introduce enforcement situation of the present invention below in conjunction with accompanying drawing, they only be implement the present invention some for example, do not comprise full content of the present invention.
Embodiment one
Employing 4～10%Zn 0.8～1.5%Mg 0.2～0.5%Zr surplus is that the aluminium alloy of Al is made the pipe diameter that its external diameter of a thin-walled tube is slightly less than needs protection in advance; this aluminium-alloy pipe is carried out anneal; fill in the steel pipe then; drawing process routinely; make the aluminium-alloy pipe expansion; make it be close to the steel pipe inwall, thereby prevent the steel pipe inner wall corrosion, see Fig. 1.
Embodiment two
Adopt thermoplastic resin polyphenylene sulfide containing 0.05% indium, 0.05% cerium all the other are pasted on the rail surface of the firm oxide film of reservation for the metal film of lower potential of aluminium with the as-annealed condition of thickness 80 μ m, insulation is 1-2 minute under 280 ℃ of temperature, and exert pressure to make and paste firmly, resistance value between metal film of lower potential and rail is seen Fig. 2 less than 1 Ω.
Embodiment three
After pressing the same method Cladding Steel ironware of embodiment two, compress metal film of lower potential with the bolt and the pad of electronegative metal system, thereby reduce the resistance between metallic membrane and steel part, see Fig. 3.
Embodiment four
Binder formula:
Solid epoxy powder (epoxy equivalent (weight) 850) 64%
Linear epoxy resin solution (25%) 30%
Quicken Dyhard RU 100 3%
Apply the binding agent of the about 5-10 μ of layer thickness m on the thick metal film of lower potential of 70 μ m, oven dry removes and desolvates afterwards standbyly under 60-80 ℃ of temperature, sees Figure 12.
The above-mentioned metal film of lower potential that scribbles binding agent is coated the steel plate two sides, and pressurization is 3-5 minute under 180-200 ℃ temperature, naturally cooling then, and the resistance between metal film of lower potential and steel plate is seen Fig. 4 less than 1 Ω.
Embodiment five
Binder formula:
The host solidifying agent
E44 epoxy resin polyamide (amine value 200)
Before using above-mentioned host and solidifying agent are mixed by 5/4 weight ratio, apply the skim binding agent respectively on the thick metal film of lower potential of 75 μ m surface surperficial and channel-section steel, and at room temperature left standstill 10-30 minute, then with metal film of lower potential and channel-section steel pressing, at room temperature place and made completely solidified in 24 hours, see Fig. 9.
Embodiment six
After applying the binding agent of the about 5-10 μ of layer thickness m on the thick metal film of lower potential of 80 μ m, and dry removing desolvate, and for steel part provides the metallic membrane of galvanic protection and shielding protection standby, or as production marketing, sees Figure 12 as specially.
Embodiment seven
After applying the binding agent of the about 5-10 μ of layer thickness m on the thick metal film of lower potential of 75 μ m; supercoat and dry removing are desolvated outside another side applies one deck again; for steel part provides the metallic membrane of galvanic protection and shielding protection standby, or, see Figure 13 as special as production marketing.
Embodiment eight
By controlled galvanic protection system; at first coat one deck insulating protective layer on the surface of oil transportation or gas transmission pipe; then in the insulating protective layer of every steel pipe outside again segmentation closely coat one deck and be insulated the isolated metal film of lower potential of thing mutually; see Fig. 8; every steel pipe interconnects by conducting connecting part, lead, trip switch respectively and is communicated with the zero resistance reometer; form controlled galvanic protection system, see Figure 15.
Description of drawings:
Fig. 1 adopts the extruding hubbing to coat the steel pipe synoptic diagram of one deck electronegative metal protective layer at inwall by the present invention
The rail synoptic diagram that Fig. 2 coats by the present invention
Fig. 3 increases fastening piece and reduces the resistance synoptic diagram
The steel plate synoptic diagram that Fig. 4 coats by the present invention
The A-A position enlarged diagram of Fig. 5 Fig. 4
Fig. 6 steel plate of the present invention increases the synoptic diagram of one deck supercoat outward
The B-B position enlarged diagram of Fig. 7 Fig. 6
The steel pipe synoptic diagram that Fig. 8 coats by controlled galvanic protection system of the present invention
The channel-section steel synoptic diagram that Fig. 9 coats by the present invention
The angle steel synoptic diagram that Figure 10 coats by the present invention
The joist steel synoptic diagram that Figure 11 coats by the present invention
Figure 12 is used as the metallic membrane synoptic diagram that metalwork provides galvanic protection and shielding protection specially
The outside surface of the metallic membrane that Figure 13 is shown in Figure 12 increases the metallic membrane synoptic diagram of organic or inorganic external protection again
Figure 14 rail welding place and welded heat affecting zone compress the synoptic diagram that method obtains galvanic protection and shielding protection with the chuck of electronegativity material system
The synoptic diagram of controlled galvanic protection system protection oil transportation of Figure 15 or gas pipe line
1. steel part or other metalwork matrixes
2. anode layer or metal film of lower potential
3. binding agent
4. the outer supercoat of Zeng Jiaing
5. heat shrink sleeve
6. the bolt of electronegative metal system or galvanized steel bolt
7. the pad of electronegative metal system or galvanized steel pad
8. the nut of electronegative metal system or galvanized steel nut
Electronegative metal system the zinc-plated or aluminized steel chuck of chuck
10. rail welding heat affected zone base material section
11. insulating protective layer or insulant
12. conducting connecting part
13. lead
14. trip switch
15. zero resistance reometer
Claims (10)
1. the metalwork of a member coated by anode sheath; it is characterized in that adopting mull technique or compress method or whole totally-enclosed ground, surface that extruding draws the method dialled that one or more layers metal film of lower potential need be protected metalwork as anode layer closely coats; form imporous shielding protection; and by fastening piece or conductive attachment part with anode layer and protected metalwork conducting; and make resistance value therebetween be not more than 1 Ω; the coating material of making the material of anode layer and fastening piece or conductive attachment part or plating fastening piece and conductive attachment part be in various moist physical environments electropotential than the deposition potential of hydrogen under the similarity condition just; and bear the electronegative metal material of 110mV at least than the electropotential of metalwork under the similarity condition; for the protection electropotential of this anode layer of steel part in fresh water or neutral medium at-850mV (CSE) between-the 1120mV (CSE); when anode layer suffered that crackle or slit appear in damage, the cathodic polarization value of the metal base that the place, slit is exposed was at least-100mV.
2. the metalwork of a member coated by anode sheath; it is characterized in that coating the insulating protective layer that a layer thickness is not more than 5mm on the whole surface that metalwork need be protected; coat again on the surface of insulating protective layer and to be insulated thing and to be divided into the anode layer of several portions of mutually insulated whole tight coating of protected metalwork; and by the conductive attachment part; lead; trip switch is with the each several part conducting of anode layer; and connection testing instrument; perhaps be connected in series a constant potential controllable direct current power supply; form controlled galvanic protection system; the material of making anode layer and fastening piece or conductive attachment part or the coating material of plating fastening piece and conductive attachment part are the electropotential in various moist physical environments is born 110mV at least than the electropotential of metalwork under the similarity condition electronegative metal materials; it perhaps is non-sacrifice metallic substance; provide cathodic protection current by electronegative metal material or external direct current power supply or both actings in conjunction; by just regulating the control anode potential than the deposition potential of hydrogen under the similarity condition; than the negative at least 110mV of the electropotential of protected metalwork; for the protection electropotential of this anode layer of steel part in fresh water or neutral medium be controlled at-850mV (CSE) is between-the 1120mV (CSE); when anode layer is damaged; crackle or slit occur, the cathodic polarization value of the metal base that the place, slit is exposed is at least-100mV.
3. press the metalwork of claim 1 or the described member coated by anode sheath of claim 2; it is characterized in that not coating in advance at weld and these positions of welded heat affecting zone of metalwork; the member coated by anode sheath again that finishes to be welded; or member coated by anode sheath again behind the coated insulation protective layer; and this position anode layer is communicated with the anode layer at all the other positions; make resistance therebetween be not more than 1 Ω; the material that adopts electropotential not to be higher than the electropotential of other position anode layer make or plating have metal chuck that shape and the metalwork that is coated of the coating of kind electrode current potential match and coat and compress and tight these positions of fitting; or by coating these positions again after the insulation layer isolation; and the metal chuck is communicated with the anode layer at all the other positions; make resistance therebetween be not more than 1 Ω, thereby make the weld of metalwork and welded heat affecting zone obtain galvanic protection and shielding protection.
4. one kind is used as the metal film of lower potential that metalwork provides galvanic protection and shielding protection specially; it is characterized in that what the electropotential of described metal film of lower potential in various moist physical environments made than the electronegative metal material of the negative at least 110mV of electropotential of metalwork under the similarity condition; be selected from the metallic membrane of various as-heat-treated condition and various different surface treatment or delustring treated state; coating adhesive again before the internal surface of this metal film of lower potential or outside surface or surfaces externally and internally are coated with one or more layers binding agent or are not coated with use in advance, the total area of metallic membrane single face is not less than 10 square metres.
5. be used as the metal film of lower potential that metalwork provides galvanic protection and shielding protection specially by the metalwork of claim 1 or the described member coated by anode sheath of claim 2 or claim 4 are described; it is characterized in that described electronegative metal material is selected from is added with gallium; zinc; silicon; magnesium; mercury; indium; tin; cadmium; aluminium; manganese; titanium; carbon; nickel; bismuth; plumbous; calcium; beryllium; lithium; antimony; strontium; scandium; zirconium; vanadium; chromium; molybdenum; phosphorus; boron; germanium; the aluminium of a kind of or several elements in rare earth metal or other elements; aluminium alloy; zinc; zinc alloy; magnesium or magnesium alloy; wherein at least a; or select for use copper content be not more than 0.1% and iron-holder be not more than 0.7% aluminum or aluminum alloy, this electronegative metal material unit elongation below the room temperature when as-annealed condition is no less than 30%.
6. be used as the metal film of lower potential that metalwork provides galvanic protection and shielding protection specially by the metalwork of claim 1 or the described member coated by anode sheath of claim 2 or claim 4 are described; it is characterized in that being coated with the ionic conduction coating layer that one or more layers is formed the ionic conduction activator or the inhibiter of electrolyte ion conducting at the outside surface of described anode layer or metal film of lower potential or internal surface or surfaces externally and internally; thereby the assurance metalwork in use coats the anode layer of this metalwork and is damaged; when crackle or slit occurring; the cathodic polarization value of the metal base that the place, slit is exposed is at least-100mV, is added with one or more inhibiter that do not cause anode passivation in this ionic conduction activator or does not contain inhibiter.
7. be used as the metal film of lower potential that metalwork provides galvanic protection and shielding protection specially by the metalwork of claim 1 or the described member coated by anode sheath of claim 2 or claim 4 are described; it is characterized in that described binding agent is selected from thermoplastic resin; thermosetting resin; natural resin; synthetic resins; be added with various additive agent modified thermoplasticity or thermosetting resin; the synthetics of several resins; mineral binder bond; the mineral binder bond of modification; the mineral binder bond of organism modification; mineral-modified organic binder bond; binding agent between organism and inorganics; conductive adhesive; hot melt adhesive; be added with the binding agent of zinc powder or Zinc alloy powder; be added with the binding agent of aluminium powder or Al alloy powder; be added with the binding agent of magnesium powder or magnesium alloy powder; be added with the binding agent and the binding agent that is added with inhibiter of other electronegative conductive powders; wherein at least a, above-mentioned binding agent is to treat after not solvent-laden binding agent or the solvent-laden adhesive coated that solvent evaporates is intact bonding again.
8. press the metalwork of the described member coated by anode sheath of claim 1; it is characterized in that coating a layer insulating or coat the ionic conduction coating layer that one deck is formed the ionic conduction activator or the inhibiter of electrolyte ion conducting on the anode layer surface earlier on the surface of anode layer; on the ionic conduction coating layer, coat a layer insulating again; and then coating one deck is insulated the second anode layer that the thing insulation is divided into the identical material making of plurality of sections and employing and anode layer; pass through conducting connecting part; lead and trip switch are communicated with each section of second anode layer; and be communicated with anode layer by reometer; according to the electric current between anode layer and the second anode layer or the variation of current potential; monitor the galvanic protection effect and regulate and control by the segmentation analysis, its appearance of second anode layer also can coat one deck ionic conduction coating layer again.
9. press the metalwork of claim 2 or the described member coated by anode sheath of claim 8, the material that it is characterized in that described insulation layer and insulant is selected from various natural resins, synthetic resins, Resins, epoxy, polyvinyl resin, epoxide coal bituminous, petroleum pitch, coal-tar pitch, coal-tar enamel, fiberglass braided thing or other insulant, and is wherein at least a.
10. be used as the metal film of lower potential that metalwork provides galvanic protection and shielding protection specially by the metalwork of claim 1 or the described member coated by anode sheath of claim 2 or claim 4 are described; it is characterized in that outermost at described anode layer or metal film of lower potential has the external protection of one or more layers organic or inorganic, comprises coating layer, enhancement layer or coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410030537 CN1654711A (en) | 2003-04-02 | 2004-04-01 | Metal member coated by anode sheath |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03117593 | 2003-04-02 | ||
| CN03117593.7 | 2003-04-02 | ||
| CN03117594 | 2003-04-02 | ||
| CN03117594.5 | 2003-04-02 | ||
| CN 200410030537 CN1654711A (en) | 2003-04-02 | 2004-04-01 | Metal member coated by anode sheath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1654711A true CN1654711A (en) | 2005-08-17 |
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ID=34915823
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410030537 Pending CN1654711A (en) | 2003-04-02 | 2004-04-01 | Metal member coated by anode sheath |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260812A (en) * | 2011-07-06 | 2011-11-30 | 昆明理工大学 | Magnesium-based material with comprehensive rays and neutron shielding effect |
| CN102260813A (en) * | 2011-07-06 | 2011-11-30 | 昆明理工大学 | High-strength plumbum-based material with ray and neutron comprehensive shielding effect |
| CN102268582A (en) * | 2011-07-06 | 2011-12-07 | 昆明理工大学 | Alumina-based material with comprehensive shielding effect of rays and neutrons |
| CN106119859A (en) * | 2016-08-10 | 2016-11-16 | 江苏溧阳建设集团有限公司 | A kind of protecting reinforced concrete cathode device |
| CN102260812B (en) * | 2011-07-06 | 2016-11-30 | 昆明理工大学 | There is the mg-based material of ray and neutron comprehensive shielding effect |
-
2004
- 2004-04-01 CN CN 200410030537 patent/CN1654711A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260812A (en) * | 2011-07-06 | 2011-11-30 | 昆明理工大学 | Magnesium-based material with comprehensive rays and neutron shielding effect |
| CN102260813A (en) * | 2011-07-06 | 2011-11-30 | 昆明理工大学 | High-strength plumbum-based material with ray and neutron comprehensive shielding effect |
| CN102268582A (en) * | 2011-07-06 | 2011-12-07 | 昆明理工大学 | Alumina-based material with comprehensive shielding effect of rays and neutrons |
| CN102268582B (en) * | 2011-07-06 | 2016-11-23 | 昆明理工大学 | There is the alumina-base material of ray and neutron comprehensive shielding effect |
| CN102260812B (en) * | 2011-07-06 | 2016-11-30 | 昆明理工大学 | There is the mg-based material of ray and neutron comprehensive shielding effect |
| CN106119859A (en) * | 2016-08-10 | 2016-11-16 | 江苏溧阳建设集团有限公司 | A kind of protecting reinforced concrete cathode device |
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