CN100359048C - Conductor roll restoring method - Google Patents
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- CN100359048C CN100359048C CNB2004100734980A CN200410073498A CN100359048C CN 100359048 C CN100359048 C CN 100359048C CN B2004100734980 A CNB2004100734980 A CN B2004100734980A CN 200410073498 A CN200410073498 A CN 200410073498A CN 100359048 C CN100359048 C CN 100359048C
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Abstract
The present invention discloses a restoring method of a conductor roll for various electric tin plating machine groups, which successively comprises the steps of removing chromium, grinding, electrically plating or spraying a copper layer, grinding, polishing, carrying out a composite chromium plating process and carrying out a polishing treatment. In a bottom layer chromium plating process in the step of the composite chromium plating process, CrO3, H2SO4, rare earth La and rare earth Tb are added in plating liquid, and in a surface layer chromium plating process in the step of the composite chromium plating process, CrO3, H2SO4, the rare earth La, the rare earth Tb, KIO3 fine particles and Al2O3 fine particles are added in the plating liquid. The restoring method of a conductor roll for various electric tin plating machine groups has the advantages of high conductor roll hardness, good abrasive resistance, high plating layer and basal body binding strength, no crack and exfoliation in the use of a plating layer and long conductor roll service life, and the restoring method of a conductor roll for various electric tin plating machine groups also removes chromium by electrolysis and can rapidly remove the chromium.
Description
Technical field
The present invention relates to conductor roll restoring method, particularly the restorative procedure of all kinds Electroplating Tin Set conductive rollers.
Background technology
Anti-corrosion, nontoxic and characteristics such as the deep processing performance is good, mechanical property height that tin plate has have been widely used in industries such as food and drink processing.Usually will carry out the soft heat hardening behind the tin plating of the steel plate and process, the soft heat section is to affect the vital factor of tin-plated board corrosion-resistance.The purpose of soft heat is that a part of tin and band steel are reacted, and forms intermetallic compound FeSn
2(being the tin iron alloy layer).The tin iron alloy layer can make the tin layer that good adhesive force is being arranged with steel, and can improve the corrosion resistance of tin plate.The soft heat mode of tin plate mainly contains resistance soft heat and induction reflow.Resistance soft heat device is made up of equipment such as the deflector roll of conductive rollers, reactance coil, soft heat tower, soft heat top of tower, hardening grooves.Conductive rollers can not ground connection, in order to guarantee conductive rollers and band steel excellent contact is arranged, and also has a water-cooled pressure roller on each conductive rollers.Simultaneously, the conductive rollers surface should keep clean, and prevents to be with steel and conductive rollers to burn point because of local loose contact produces electric arc.Therefore, electronic adjustable clearing apparatus also is housed on the conductive rollers.During work, this device moves around along the conductive rollers axial direction due, cleaning and grinding conductive rollers surface.With the heating-up temperature of steel, be to regulate by the voltage that adjusting is added on the induction coil during induction reflow heating.Its advantage is that the band steel does not contact conductive rollers, thereby the electric arc that can not produce appearance when resembling resistance soft heat heating burns surface imperfection such as point, next is that rate of heating is fast, can keep a stable temperature, and voltage that can be by adjusting each ruhmkorff coil and respectively control current influence reflowing temperature---time curve, thereby can be in the needed tin iron alloy layer of the scope inner control amount of broad.Simultaneously, also can not damage plate shape.But induction heating investment cost height, electrothermal efficiency is more much lower than resistance soft heat, and high-frequency component damages easily, and productive expense is also high.Therefore, the resistance soft heat is still extensively adopted in tin plate is produced.
The conductive rollers that is installed in Electroplating Tin Set soft heat section is the crucial spare part on the Electroplating Tin Set, and its quality directly influences the operating rate of the surface quality of tin plate, zinc-plated unit and the production cost of tin plate.The conductive rollers structure is seen Fig. 2, it is to electroplate or spray the copper layer 2 that conducts electricity very well on the iron core roller 1, re-plating hard chrome coating 3, switch on by conductive carbon brush roll axle head ring header, the roller surface is also carried out texturing and is handled, make roll surface have higher roughness, to improve the surface quality of tin plate, the surfaceness before conductive rollers is used generally is controlled at Ra4.0 μ m-Ra10.0 μ m.During conductive rollers is used, because the friction of tin plate and conductive rollers causes the roll surface roughness constantly to reduce.Roll surface roughness less than 1.0 μ m after, tin plate sheet surface easily produces " small particles " defective, " small particles " is a kind of critical defect that tin layer scaling loss is injured or do not injure fully alloy layer, it directly influences the corrosion resisting property and the coating performance of tin plate.At present, in order to eliminate " small particles " defective of tin plate, mainly take the means of frequent conductive rollers, so both increased labor strength, reduced equipment operation rate, also increased conductive rollers rehabilitation cost and Tinplate Production cost simultaneously.Therefore, improve the conductive rollers wearability, for the reduction that alleviates and delay the conductive rollers surface roughness, prolong conductive rollers service life, improve the Electroplating Tin Set operating rate, reduce the conductive rollers rehabilitation cost and reduce the ferrostan production cost and will have positive meaning.
Composite conducting roller technology in a kind of electrolytic tinplate production unit is disclosed among the Chinese patent CN2418136, the multiple layer metal layers such as clad metal bottom, conductive layer and wearing layer successively on the surface of the metal body of roll.The conductive layer hardness of this conductive rollers is low, and behind grinding machine, roll surface is prone to the vestige that stays after the emery wheel sand grains slides; directly carrying out texturing handles; the vestige that the emery wheel sand grains stays after sliding still remains in roll surface, still retains after the chromium plating, influences the visual appearance of tin plate.Direct chromium plating is processed in the conductive layer texturing, roll surface be prone to chromium must, chromium must existence, both affected the presentation quality of tin plate, and chromium must come off easily under the rubbing action of tin plate, cause the conductive rollers surface roughness sharply to descend.Common chrome-plated process also exists the chromium coating bonding strength low, the easy to crack and deficiency of peeling off in the use.In order to improve the quality of chromium coating, a kind of element part durionise electrolytic solution is disclosed in the German patent DE 19828545, its composition is: chromic anhydride 100-600g/L, the molar concentration rate of hexavalent chromium and sulfate ion is (90-120): 1, and 2-hydroxyethanesulfonic acid radical ion is 0.01-3.0g/L.Disclose a kind of self-regulated plating chromic electrolyte among the Russ P RU2110621, its composition is: chromic anhydride 80-100g/L, Strontium Sulphate 6.0-7.0g/L, Calcium Fluoride (Fluorspan) 5.0-6.0g/L, phosphorus-wolframic acid 8.0-10.0g/L.They are used for chromium plating on copper and the steel-iron components, can obviously improve cathode efficiency and the quality of coating of chromium plating, but the coating hardness raising is not obvious, and cladding wearability does not have obvious raising yet.Reported the multi-functional hard chromium manufacture method of a kind of plating among the Japanese Patent Publication 62-56600, namely in the crack of chromium coating, filled carborundum particle, made coating obtain high wearability.But this single wear-resisting hard chromium cladding exists coating and substrate combinating strength low, the easy to crack and deficiency of peeling off during coating uses.
Summary of the invention
The purpose of this invention is to provide a kind of restorative procedure that is used for the conductive rollers of Electroplating Tin Set, repair conductive rollers with this method, hardness height, wear resistance are good, coating and high base strength height, can not occur cracking during coating uses and peel off the conductive rollers long service life.
For solving the problems of the technologies described above, the present invention includes conductive rollers is moved back chromium, grinding, plating or spraying copper layer, polishing, texturing, improvements of the present invention are that it carries out composite chrome plating to conductive rollers, described conductive rollers composite chrome plating comprises chromium plating of conductive rollers bottom and surface layer chromium plating, during bottom chromium plating, in plating bath except adding chromic anhydride (CrO
3) and sulfuric acid (H
2SO
4) outside, also add Rare Earth Lanthanum (La) and terbium (Tb); During surface layer chromium plating, in plating bath, add chromic anhydride (CrO3) and sulfuric acid (H
2SO
4), Rare Earth Lanthanum (La) and terbium (Tb) also add KIO
3And Al
2O
3Particulate.
When composite chrome plating carried out bottom chromium plating, lanthanum and terbium were with rare earth oxide La
2O
3And Tb
4O
7Form adds La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L.CrO when composite chrome plating carries out bottom chromium plating
3Content is 100-300g/L, H
2SO
4Content is 1.5-4.0g/L.Bottom chromium plating, the bath temperature of chromium underlayer are 65-79 ℃, current density 15-25A/dm
2, chromium plating underlayer thickness 20-80 μ m.
When composite chrome plating carries out surface layer chromium plating, CrO in the plating bath
3Content is 150-350g/L, H
2SO
4Content is 1.5-4.0g/L, La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L.Potassiumiodate (KIO
3) content is 0.1-0.4g/L, aluminium oxide (Al
2O
3) particulate is 20-80g/L, Al
2O
3Be in the solid particle adding plating bath with 0.3-4.0 μ m, make it in solution, to keep suspended state by stirring.During surface layer chromium plating bath temperature 48-62 ℃, current density 15-60A/dm
2, chromium plating surface thickness 50-150 μ m.
When moving back chromium, the present invention adopts Na
2CO
3Chromium is moved back in the electrolysis of solutions.Na in the electrolytic solution
2CO
3Concentration is 30-80g/L, anodic current density 2-7A/dm
2, negative electrode adopts iron plate or titanium plate, electrolyte temperature 45-75 ℃.
The present invention adopts composite chrome plating technology, with the contacted side of copper layer, adopt low current and high-temperature plating bath, acquisition bond strength and good toughness, the coating that hole is few, crackle is few, the chromium coating of roll surface adopts low bath temperature, has also added aluminium oxide (Al in the plating bath
2O
3) particulate, the scuff-resistant coating of acquisition high rigidity.Except adding chromic anhydride and sulfuric acid, Rare Earth Lanthanum (La) and terbium (Tb) and Potassiumiodate (KIO have also been added in the plating bath
3), mainly be in order to improve cathode efficiency, coating deposition rate and to improve Al
2O
3The uniformity of Particle Distribution.Moving back chromium in the conductive rollers reparation adopts electrolysis to move back chromium; three polishings have been increased before and after the conductive rollers texturing and after the chromium plating; polishing is thoroughly to eliminate the sand grains slip vestige that conductive rollers copper layer stays behind wheel grinding for the first time; the some needle-like projections that occur after the texturing of conductive rollers copper layer can be eliminated after the polishing for the second time, the chromium palpus on conductive rollers surface can be eliminated for the third time after the polishing.
The invention has the beneficial effects as follows:
1. the present invention repairs conductive rollers, and conductive rollers goes up grinding machine processing again after chromium is moved back in electrolysis, the distortion of roll surface in the time of not only can eliminating the chromium plating conductive rollers directly chromium is moved back in grinding on grinding machine, and can save grinding time 60%-80%.
2. the present invention repairs conductive rollers, three polishings have been carried out before and after the conductive rollers texturing and after the chromium plating, the chromium that not only can eliminate the conductive rollers surface must, improve the conductive rollers wearability, can also thoroughly eliminate because copper layer hardness is low, during wheel grinding, the emery wheel sand grains is easily left a trace at roll surface after the copper layer rolls or slides, and has eliminated the impact of vestige to the tin plate presentation quality.
3. the present invention repairs conductive rollers, and chromium coating adopts composite chrome plating technology, and the chromium plating bottom adopts low current and high bath temperature, can obtain bonding strength greater than 250MPa and good toughness, hole is few, crackle is few coating.The Al that contains high rigidity in the plating bath of chromium plating surface layer
2O
3Particulate by add lanthanum, terbium and Potassiumiodate in plating bath, can obtain hardness greater than the scuff-resistant coating of 1000Hv.After adding lanthanum, terbium and Potassiumiodate in the plating bath, cathode efficiency can be brought up to more than 20%.Cladding wearability is good, carries out wear test at the M200 abrasion tester, and the wear rate of common chromium coating is 5.47mg/Km, and contains Al
2O
3The wear rate of particulate wear-resistant chromium plating layer only is 2.53-3.06mg/Km.
4. repair conductive rollers with the present invention, can prolong conductive rollers service life, conductive rollers was brought up to more than 120 days by 77.5 days service time.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is a conductive rollers structure iron of the present invention.
Embodiment:
The present invention includes following steps:
(1), moves back chromium: conductive rollers is moved back chromium; Move back chromium and adopt Na
2CO
3Chromium is moved back in the electrolysis of solutions, Na in the electrolytic solution
2CO
3Concentration is 30-80g/L, anodic current density 2-7A/dm
2, negative electrode adopts iron plate or titanium plate, electrolyte temperature 45-75 ℃.
Conductive rollers reparation grinding machine commonly used moves back chromium, and technology is simple.Because conductive rollers is hollow roll, wall thickness, and chromium coating hardness height, grinding performance is poor, the chromium plating conductive rollers directly on grinding machine grinding move back chromium, roll surface is yielding, and the grinding time is long.The hydrochloric acid infusion process is generally adopted in the stripping of common chromium coating, but concentration of hydrochloric acid and temperature be when low, and it is long to move back the chromium time, when concentration of hydrochloric acid and temperature are high, move back the chromium time although can obviously shorten, make the oxidation of copper layer, affect the electric conductivity of copper layer, also make iron layer heavy corrosion.Adopt Na
2CO
3Chromium is moved back in the electrolysis of solutions, Na in the electrolytic solution
2CO
3Concentration is 30-80g/L, anodic current density 2-7A/dm
2, negative electrode adopts iron plate or titanium plate, electrolyte temperature 45-75 ℃, can realize moving back fast chromium, and copper layer and iron layer are had no effect.Conductive rollers continues upper grinding machine after chromium is moved back in electrolysis, the distortion of roll surface in the time of can eliminating on the one hand chromium-plated conductive roller directly chromium is moved back in grinding on grinding machine, and can save grinding time 60%-80%.
(2), grinding: conductive rollers is grinding after chromium is moved back in electrolysis;
(3), electroplate or spray copper layer → grinding → polishing → texturing → polishing:
Conductive rollers is carried out grinding after adopting plating or spraying method coating electrically conductive copper layer.Because copper layer hardness is low, during wheel grinding, the emery wheel sand grains is easily left a trace after the copper layer rolls or slides, and after directly carrying out texturing and processing, the vestige that the emery wheel sand grains stays still remains in roll surface, still remains in roll surface after the chromium plating, affects the presentation quality of tin plate.After the grinding of conductive rollers copper layer, add and remove the polishing that the emery wheel sand grains is left a trace after the copper layer rolls or slides, can eliminate the sand grains vestige on copper layer surface, improve conductive rollers roll surface quality.
Conductive rollers is after sandblast, shot-peening, electric spark or laser roughening are processed, there are many needle-like projections in the conductive rollers surface, their existence is prone to chromium when promoting subsequently chromium plating of conductive rollers must, therefore adding stock removal polishing after the texturing of conductive rollers copper layer processes, can eliminate the some needle-like projections that occur after the texturing of conductive rollers copper layer, the generation of conductive rollers surface chromium palpus when alleviating subsequently chromium plating.
(4), composite chrome plating:
1., during bottom chromium plating, in plating bath except adding chromic anhydride (CrO
3) and sulfuric acid (H
2SO
4) outside, also add Rare Earth Lanthanum (La) and terbium (Tb); Lanthanum and terbium are with rare earth oxide La
2O
3And Tb
4O
7Form adds, CrO
3Content is 100-300g/L, H
2SO
4Content is 1.5-4.0g/L, La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L.Bottom chromium plating, the bath temperature of chromium underlayer are 65-79 ℃, current density 15-25A/dm
2, chromium plating underlayer thickness 20-80 μ m.
2., during surface layer chromium plating, in plating bath, add chromic anhydride (CrO3) and sulfuric acid (H
2SO
4), Rare Earth Lanthanum (La) and terbium (Tb) also add KIO
3And Al
2O
3Particulate; CrO in the plating bath
3Content is 150-350g/L, H
28O
4Content is 1.5-4.0g/L, La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L, Potassiumiodate (KIO
3) content is 0.1-0.4g/L, aluminium oxide (Al
2O
3) particulate is 20-g0g/L, Al
2O
3Be in the solid particle adding plating bath with 0.3-4.0 μ m, make it in solution, to keep suspended state by stirring.During surface layer chromium plating bath temperature 48-62 ℃, current density 15-60A/dm
2, chromium plating surface thickness 50-150 μ m.
During the chromium plating of conductive rollers roll surface, the purpose that adopts composite chrome plating is in order to obtain hardness height, coating that wearability is good, also to need simultaneously the bond strength height of coating and matrix, guaranteeing that coating can not occur ftractureing and peeling off in using.Obtain composite deposite, adopt single electroplating technology to realize.Composite chrome plating technology of the present invention is to realize like this, at first, chromium plating bottom (with the contacted side of copper layer) adopts low current and high bath temperature, can obtain the high and good toughness of bond strength, hole is few, crackle is few coating, in the plating bath except adding chromic anhydride (CrO
3) and sulfuric acid (H
2SO
4) outside, also having added Rare Earth Lanthanum (La) and terbium (Tb), lanthanum and terbium are with rare earth oxide La
2O
3And Tb
4O
7Form adds.CrO
3Content is 100-300g/L, H
2SO
4Content is 1.5-4.0g/L, La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L.After adding La and Tb in the plating bath, the covering power and the cathode efficiency of electrodeposit metals chromium are significantly improved, this is because contain the compound of La and Tb as surfactant, the energy specific adsorption is at cathode surface, La and Tb have participated in the formation of cathodic coating in the mode of specific adsorption, the cathode current density that causes beginning depositing chromium has reduced, and cathode efficiency is by bringing up to more than 20% below 10%.The bath temperature of chromium plating bottom is 65-79 ℃, current density 15-25A/dm
2Chromium plating underlayer thickness 20-80 μ m, chromium plating bottom and copper layer bonding strength are greater than 250MPa.
Chromium plating surface layer (working lining) mainly is in order to obtain hardness height, coating that wear resistance is good.CrO in the plating bath
3Content is 150-350g/L, H
2SO
4Content is 1.5-4.0g/L, La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L.Potassiumiodate (the KIO that has added in addition 0.1-0.4g/L
3) and the aluminium oxide (Al of 20-80g/L
2O
3) particulate, Al
2O
3Be in the solid particle adding plating bath with 0.3-4.0 μ m, make it in solution, to keep suspended state by stirring.After adding La and Tb in the chromium plating surface layer, except the covering power that makes electrodeposit metals chromium and cathode efficiency significantly improved, they impelled Al in addition
2O
3Particulate and chromium codeposition make Al in the coating
2O
3Content obviously increases, and causes coating hardness to improve, and wearability is improved.This is because rare-earth elements La and Tb have outermost f electronic structure, and stronger adsorption capacity is arranged, and can make the Al in the solution
2O
3Microparticle surfaces adsorbs more positive charge, has improved Al
2O
3Particulate has accelerated Al in the adsorption capacity of cathode surface under the effect of electric field force
2O
3Particulate and metal codeposition cause Al in the coating
2O
3Content increases.Add KIO in the plating bath
3After, the deposition potential of chromium is shuffled, improved the current efficiency of negative electrode, also have raising Al
2O
3Particulate is equally distributed ability in the chromium layer, is very favourable to the wearability of improving chromium coating.Bath temperature 48-62 ℃, current density 15-60A/dm
2Chromium plating surface thickness 50-150 μ m, hardness is greater than 1000Hv.
(5), polished finish:
Carrying out polishing after the chromium plating, mainly is in order to eliminate the chromium palpus on chromium coating surface, to improve the wearability of chromium coating.
The invention will be further described below in conjunction with embodiment:
Embodiment 1:
At first adopting electrolysis to move back the chromium method is that 1500mm, roll diameter D are that 610mm and total length L2 are the stripping of 3450mm conductive rollers remained on surface chromium layer with roll surface length L 1, when chromium is moved back in electrolysis, contains the Na of 43.5g/L in the electrolytic solution
2CO
3, anodic current density 6.3A/dm
2, negative electrode adopts iron plate, and 65 ℃ of electrolyte temperatures move back 23.8 minutes chromium time, after the electrolysis copper layer 2 and iron layer 1 are had no effect.Conductive rollers continues upper grinding machine after chromium is moved back in electrolysis, adopt then electro-plating method at the copper layer 2 of conductive rollers surface applied thickness 3.5mm, after grinding, carries out polishing, uses then 40
#Quartz sand carries out sandblast texturing at the copper layer to be processed, and when copper layer surface roughness reaches 7.8 μ m, carries out the polishing second time, carries out composite chrome plating after the polishing, during bottom chromium plating, and CrO in the plating bath
3Content is 135g/L, H
2SO
4Content is 2.7g/L, La
2O
3Content is 0.6g/L, Tb
4O
7Content is 1.5g/L.72 ℃ of bath temperatures, current density 18A/dm
2Chromium plating underlayer thickness 40 μ m, chromium plating bottom and copper layer bonding strength 265MPa.During surface layer chromium plating, CrO in the plating bath
3Content is 240g/L, H
2SO
4Content is 2.8g/L, La
2O
3Content is 0.7g/L, Tb
4O
7Content is 1.3g/L, KIO
3Content 0.2g/L, Al
2O
3Content 60g/L, Al
2O
3Be in the solid particle adding plating bath with 0.8-2.0 μ m, make it in solution, to keep suspended state by stirring.55 ℃ of bath temperatures, current density 28A/dm
2Chromium plating surface thickness 81 μ m.Carry out polished finish after the chromium plating, last conductive rollers chrome-faced layer 3 thickness are 119 μ m, hardness 1030Hv, and surfaceness is 5.93 μ m.
Embodiment 2:
At first adopting electrolysis to move back the chromium method is that 1500mm, roll diameter D are that 610mm and total length L2 are the stripping of 3450mm conductive rollers remained on surface chromium layer with roll surface length L 1, when chromium is moved back in electrolysis, contains the Na of 70.7g/L in the electrolytic solution
2CO
3, anodic current density 3.1A/dm
2, negative electrode adopts iron plate, and 53 ℃ of electrolyte temperatures move back 21.6 minutes chromium time, after the electrolysis copper layer 2 and iron layer 1 are had no effect.Conductive rollers continues upper grinding machine after chromium is moved back in electrolysis, adopt then electro-plating method at the copper layer 2 of conductive rollers surface applied thickness 3.7mm, after grinding, carries out polishing, uses then 40
#Quartz sand carries out sandblast texturing at the copper layer to be processed, and when copper layer surface roughness reaches 7.9 μ m, carries out the polishing second time, carries out composite chrome plating after the polishing, during bottom chromium plating, and CrO in the plating bath
3Content is 177g/L, H
2SO
4Content is 1.9g/L, La
2O
3Content is 1.1g/L, Tb
4O
7Content is 0.9g/L.73 ℃ of bath temperatures, current density 17A/dm
2Chromium plating underlayer thickness 38 μ m, chromium plating bottom and copper layer bonding strength 269MPa.During surface layer chromium plating, CrO in the plating bath
3Content is 287g/L, H
2SO
4Content is 3.1g/L, La
2O
3Content is 0.8g/L, Tb
4O
7Content is 0.9g/L, KIO
3Content 0.3g/L, Al
2O
3Content 75g/L, Al
2O
3Be in the solid particle adding plating bath with 1.0-3.0 μ m, make it in solution, to keep suspended state by stirring.58 ℃ of bath temperatures, current density 31A/dm
2Chromium plating surface thickness 94 μ m.Carry out polished finish after the chromium plating, last conductive rollers chrome-faced layer 3 thickness are 131 μ m, hardness 1059Hv, and surfaceness is 6.22 μ m.
Conductor roll restoring method of the present invention compared with prior art has the following advantages:
The present invention repairs conductive rollers, and the residual chromium layer of roll surface adopts electrolysis to move back chromium replacement grinding and moves back chromium, and electrolysis is moved back It is fast that chromium has speed, do not damage the characteristics such as copper plate and iron layer, overcome grinding move back chromium conductive rollers distortion big, The deficiency that the grinding time is long. Increase by three polishings before and after the conductive rollers texturing and after the chromium plating, throw for the first time The purpose of light is thoroughly to eliminate the vestige that the conductive rollers copper plate stays after the emery wheel sand grains rolls and slides, the Can eliminate the some needle-like projections that occur after the texturing of conductive rollers copper layer behind the second polishing, for the third time after the polishing Can eliminate the chromium palpus on conductive rollers surface. Adopt composite chrome plating technology, obtained bond strength height and toughness Well, hole and the few chromium plating bottom of crackle. In plating bath, add Al2O
3Particulate can obtain high rigidity Wear-resisting chromium layer, add lanthanum, terbium and Potassiumiodate in the plating bath after, cathode efficiency can bring up to 20% with On. Cladding wearability is good, carries out wear test at the M200 abrasion tester, the wearing and tearing of common chromium coating Rate is 5.47mg/Km, and contains Al2O
3The wear rate of particulate wear-resistant chromium plating layer only is 2.53-3.06mg/Km. Repair conductive rollers with the present invention, coating even wearing when conductive rollers is used does not have cracking, peeling phenomenon appearance, Use conductive rollers of the present invention, strip quality is had no adverse effects. Conductive rollers of the present invention is led than common reparation The electricity roller obviously prolongs service life, and conductive rollers was brought up to more than 120 days by 77.5 days service time, can Improve the Electroplating Tin Set operating rate, alleviate labor strength, save the conductive rollers rehabilitation expense, have very Good economic benefit.
Claims (9)
1, a kind of conductor roll restoring method, comprise conductive rollers is moved back chromium, grinding, plating or spraying copper layer, polishing, texturing, it is characterized in that: further comprising the conductive rollers composite chrome plating, described conductive rollers composite chrome plating comprises chromium plating of conductive rollers bottom and surface layer chromium plating, during bottom chromium plating, in plating bath except adding chromic anhydride CrO
3With sulfuric acid H
2SO
4Also add Rare Earth Lanthanum La and terbium Tb outward; During surface layer chromium plating, in plating bath, add chromic anhydride CrO3 and sulfuric acid H
2SO
4, Rare Earth Lanthanum La and terbium Tb also add KIO
3And Al
2O
3Particulate.
2, conductor roll restoring method according to claim 1 is characterized in that: when composite chrome plating carried out bottom chromium plating, lanthanum and terbium were with rare earth oxide La
2O
3And Tb
4O
7Form adds La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L.
3, conductor roll restoring method according to claim 1 is characterized in that: CrO when composite chrome plating carries out bottom chromium plating
3Content is 100-300g/L, H
2SO
4Content is 1.5-4.0g/L.
4, according to claim 2 or 3 described conductor roll restoring methods, it is characterized in that: bottom chromium plating, the bath temperature of chromium underlayer are 65-79 ℃, current density 15-25A/dm
2, chromium plating underlayer thickness 20-80 μ m.
5, conductor roll restoring method according to claim 1 is characterized in that: when composite chrome plating carries out surface layer chromium plating, and CrO in the plating bath
3Content is 150-350g/L, H
2SO
4Content is 1.5-4.0g/L, La
2O
3Content is 0.5-1.8g/L, Tb
4O
7Content is 0.5-1.8g/L.
6, conductor roll restoring method according to claim 1 is characterized in that: Potassiumiodate (KIO
3) content is 0.1-0.4g/L, aluminium oxide (Al
2O
3) particulate is 20-80g/L, Al
2O
3Be in the solid particle adding plating bath with 0.3-4.0 μ m, make it in solution, to keep suspended state by stirring.
7, according to claim 5 or 6 described conductor roll restoring methods, it is characterized in that: during surface layer chromium plating bath temperature 48-62 ℃, current density 15-60A/dm
2, chromium plating surface thickness 50-150 μ m.
8, conductor roll restoring method according to claim 1 is characterized in that: move back chromium and adopt Na
2CO
3Chromium is moved back in the electrolysis of solutions.
9, conductor roll restoring method according to claim 8 is characterized in that: Na in the electrolytic solution
2CO
3Concentration is 30-80g/L, anodic current density 2-7A/dm
2, negative electrode adopts iron plate or titanium plate, electrolyte temperature 45-75 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100734980A CN100359048C (en) | 2004-12-27 | 2004-12-27 | Conductor roll restoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100734980A CN100359048C (en) | 2004-12-27 | 2004-12-27 | Conductor roll restoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1670260A CN1670260A (en) | 2005-09-21 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102021621B (en) * | 2009-09-23 | 2012-10-03 | 上海通乐冶金设备工程有限公司 | Method for chroming stainless steel conductive roller |
| CN101700645B (en) * | 2009-10-19 | 2011-07-27 | 北京中冶设备研究设计总院有限公司 | Horizontal type plating tank electric-conducting on-line honing method |
| CN102041533B (en) * | 2009-10-20 | 2013-01-02 | 上海通乐冶金设备工程有限公司 | Method for barrel-plating copper and chromium on surface of cold-rolled sheet tinned conductive roller |
| CN103834973B (en) * | 2012-11-22 | 2016-08-24 | 宝山钢铁股份有限公司 | A kind of plating restorative procedure of Hastelloy conductive rollers roll surface |
| CN102962581B (en) * | 2012-12-13 | 2015-08-12 | 中国兵器工业第五二研究所 | The Cold welding method of deformation zinc alloy and copper alloy wire |
| CN109183082A (en) * | 2018-08-20 | 2019-01-11 | 沈阳利源轨道交通装备有限公司 | A method of for repairing die wear |
| CN114618740A (en) * | 2022-03-07 | 2022-06-14 | 山东膜丽东方新材料科技有限公司 | Coating roll and processing method thereof |
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| JPS6256600A (en) * | 1985-09-03 | 1987-03-12 | ゲツツエ ア−ゲ− | Electroplated hard chromium layer |
| RU2110621C1 (en) * | 1997-01-15 | 1998-05-10 | Московский государственный вечерний металлургический институт | Self-adjusting electrolyte for chrome plating |
| CN2418136Y (en) * | 1999-12-29 | 2001-02-07 | 上海宝钢集团公司 | Composite conductive roller for electroplating tin |
| CN1307652A (en) * | 1998-06-26 | 2001-08-08 | 克罗米表面处理技术股份有限公司 | Galvanic bath, method for producing structured hard chromium layers and use thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6256600A (en) * | 1985-09-03 | 1987-03-12 | ゲツツエ ア−ゲ− | Electroplated hard chromium layer |
| RU2110621C1 (en) * | 1997-01-15 | 1998-05-10 | Московский государственный вечерний металлургический институт | Self-adjusting electrolyte for chrome plating |
| CN1307652A (en) * | 1998-06-26 | 2001-08-08 | 克罗米表面处理技术股份有限公司 | Galvanic bath, method for producing structured hard chromium layers and use thereof |
| CN2418136Y (en) * | 1999-12-29 | 2001-02-07 | 上海宝钢集团公司 | Composite conductive roller for electroplating tin |
Non-Patent Citations (1)
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| 宝钢电镀锡机组软熔导电辊失效的分析. 符寒光，邢建东，戴明山，陈志凌.钢铁研究，第4期. 2001 * |
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