CN102168244A - Steel sleeper and zinc impregnation processing method thereof - Google Patents
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Abstract
The invention discloses a steel sleeper and a zinc impregnation processing method thereof. The zinc impregnation processing method of the steel sleeper comprises steel sleeper surface pretreatment, steel sleeper surface zinc impregnation processing and steel sleeper surface aftertreatment. The steel sleeper surface zinc impregnation processing comprises the following steps of: (1) mixing zinc powder, composite powder mixed by nano cerium oxide and nano lanthanum oxide, an activating agent and a filler, then carrying out fine grinding to prepare a zinc impregnation agent; (2) carrying out zinc impregnation treatment; and (3) cooling the steel sleeper. The processing method disclosed by the invention is simple and scientific, overcomes the problems that a protecting layer of a steel sleeper treated by the prior art is easy for cracking and even falling in the long-term service process, and the like and realizes the advantages of uniform steel sleeper surface impregnation layer, good scratching resistance and high impact resistance and corrosion resistance.
Description
Technical field
The present invention relates to the steel sleeper technology, relate in particular to a kind of zinc impregnation processing method and steel sleeper of steel sleeper.
Background technology
Steel sleeper is one of important component in the railroad track, the sleeper material that extensively adopts on the railway has three kinds at present: wooden sleeper, concrete sleeper and steel sleeper, cheap wooden sleeper and the concrete sleeper of the general employing of the early stage railway of building of China, steel sleeper particularly obtains in the high-speed railway widely applying at newly built railway in recent years.The reliability of steel sleeper significantly is better than wooden sleeper and concrete sleeper, however steel sleeper in physical environment, be on active service for a long time corrosion easily take place, and then influence the work-ing life of railroad track, therefore, need rotproofing is carried out on the steel sleeper surface in the engineering application.
For the rotproofing on steel sleeper surface, the method that adopts is zinc-rich coating or pot galvanize technology usually at present.Zinc-rich coating technology comparison typical application is organic zinc-rich coating and inorganic zinc-rich coating, utilizes the metallic zinc in the coating can effectively delay corrosion to the galvanic protection effect of steel sleeper; The pot galvanize technology also is based on same principle and delays corrosion.Yet the actual Service Environment of steel sleeper is very harsh; such as: through regular meeting suffer train by the time high-frequency vibration, the train of running at high speed that cause drive sand to the steel sleeper surface constantly impact, open-air harsh climate environment and artificial destruction etc.; zinc-rich coating and pot galvanize coating are very easily damaged in above-mentioned severe environment even are come off, thereby lose provide protection.
The patent No. is: 200510013167.2, denomination of invention is: a kind of patent of nanometer composite powder zinc impregnation processing method, introduced a kind of method that adopts the nano composite powder processing metal members, adopted zinc powder, nano rare earth cerium oxide, activator and weighting agent to mix the zincizing agent that obtains, it is above to double through the workpiece layer surface hardness ratio soft steel hardness (is 115HV as No. 20 steel hardness) of this method processing, higher more than 50% than medium carbon steel (No. 45 steel hardness are 172HV) hardness.This working method has significantly improved the mechanical property of steel piece surface, but because of the steel sleeper of handling by this kind mode, its surperficial thermodiffusion spelter coating Zn/Fe alloy layer has certain fragility, this coating is under the sand that the train of running at high speed drives impacts, the risk that has cracking even come off is not suitable for handling the steel sleeper that is in for a long time under the outwork environment.
Therefore, invent a kind of prolonged application under abominable physical environment, the steel sleeper that still has excellent anti scratch resistant, shock resistance and erosion resistance is for ensureing that safe railway operation is very important.
Summary of the invention
The invention provides a kind of zinc impregnation processing method of steel sleeper,, realize that working method is simple, can process the good steel sleeper of antiseptic property in order to solve defective of the prior art.
A kind of zinc impregnation processing method of steel sleeper comprises: steel sleeper surface pre-treatment, steel sleeper surface zincizing processing and steel sleeper surface aftertreatment, the zincizing processing of described steel sleeper surface comprises the steps:
(1) preparation zincizing agent: preparation zincizing agent: zinc powder, rare earth composite powder end, activator and weighting agent are carried out the refinement milled processed after by a certain amount of mixing, composite powder after the grinding is a micro/nano level, zinc content is greater than 98% in the described zinc powder, granularity is 200～300 orders, directly adopt 200-300 purpose zinc powder to compare and adopt the bigger zinc powder of granularity, can slow down zinc powder in the process of lapping oxidation, improve the zinc powder particle size uniformity, improve the homogeneity of various powder mixes; Described rare earth composite powder end comprises nano-cerium oxide and nano lanthanum oxide, and consumption is 2%～10% of a zinc powder weight; The consumption of described activator is 0.1～0.3% of a zincizing agent weight; The particle size diameter scope is 65nm～455nm; The volume sum of described weighting agent, compound zinc powder and steel sleeper equals 90%～95% of zincizing tank volume;
(2) zincizing is handled: steel sleeper member and the zincizing agent for preparing are filled in the zincizing jar, to load good zincizing jar then and be placed on heat temperature raising in the Sherardizing furnace, zincizing jar upset heating, make the steel sleeper thermally equivalent in the zincizing jar, the heat temperature raising time was controlled in 2～2.5 hours, when temperature reaches 300～420 ℃, kept homo(io)thermism 50～120 minutes; Form the zinc-iron intermetallic compound on the steel sleeper top layer, this stratification compound and matrix steel sleeper are with metallurgical mode combination;
(3) steel sleeper cooling: after zincizing was finished dealing with, the zincizing jar was cooled to below 100 ℃ the zincizing jar be taken out from Sherardizing furnace with Sherardizing furnace, continued to be cooled to temperature and was lower than 50 ℃, and steel sleeper is separated with zincizing agent.
Further, the preferred steps of described steel sleeper surface zincizing processing is as follows:
(1) preparation zincizing agent: zinc powder, rare earth composite powder end, activator and weighting agent are carried out the refinement milled processed after by a certain amount of mixing, and zinc content is greater than 98% in the described zinc powder, and granularity is 200～300 orders; Described rare earth composite powder end comprises nano-cerium oxide and nano lanthanum oxide, and consumption is 5%～8% of a zinc powder weight; The consumption of described activator is 0.16～0.2% of a zincizing agent weight; The particle size diameter scope is 65nm～455nm; The volume sum of described weighting agent, compound zinc powder and steel sleeper equals 92%～95% of zincizing tank volume;
(2) zincizing is handled: steel sleeper member and the zincizing agent for preparing are filled in the zincizing jar, to load good zincizing jar then and be placed on heat temperature raising in the Sherardizing furnace, the zincizing jar is with the heating of overturning of 7～15 rev/mins rotating speed, make the steel sleeper thermally equivalent in the zincizing jar, the heat temperature raising time was controlled in 2～2.5 hours, when temperature reaches 300～420 ℃, kept homo(io)thermism 60～90 minutes; Form the zinc-iron intermetallic compound on the steel sleeper top layer, this stratification compound and matrix steel sleeper are with metallurgical mode combination;
(3) steel sleeper cooling: after zincizing was finished dealing with, the zincizing jar was cooled to below 100 ℃ the zincizing jar be taken out from Sherardizing furnace with Sherardizing furnace, continued to be cooled to temperature and was lower than 50 ℃, and steel sleeper is separated with zincizing agent.
Further, described rare earth composite powder end comprises nano-cerium oxide (CeO
2) and nano lanthanum oxide (La
2O
3), the part by weight of the two is 1: 0.3～3, preferred ratio is 1: 1～2.The mean particle size at described rare earth composite powder end is 110nm, and wherein granularity is not less than 50% less than the powder volume content of 110nm.
Further, described activator is ammonium chloride or zinc chloride, preferred ammonium chloride.
Further, described weighting agent is quartz sand or aluminum oxide, preferred quartz sand, and quartz sand size is 40～100 orders.
The pre-treatment of steel sleeper comprises: surface degreasing, rust cleaning, washing and drying.Surface degreasing can adopt Solvent degreasing commonly used, electrochemical deoiling, mechanical oil removing or wiping oil removing; Surface derusting adopts common chemical pickling or mechanical rust removal method, as roll cast, scrub, mechanical means such as sandblast or shot-peening.Steel sleeper behind the degreasing and rust removal obtains cleaning surfaces, exsiccant member after by washing and drying.
The aftertreatment of steel sleeper comprises: flushing, polished finish, Passivation Treatment and dry processing.Usually adopt 15% nitric acid to carry out chemical rightenning 10～25 seconds so that remove the black oxide or the remaining zinc powder of component surface, after the polishing immediately water acid is cleaned up; Carry out Passivation Treatment with chromic acid or chromatedsolution, to improve infiltration layer corrosion resistance or surface smoothness.
The present invention also provides a kind of method of steel sleeper, in order to solve defective of the prior art, has realized steel sleeper scratch resistance, shock resistance and anticorrosive, is applicable to railway territory, satisfies the harsh Service Environment requirement of railway, is specially adapted to the high-speed railway field.
A kind of steel sleeper is processed by the zinc impregnation processing method of described steel sleeper.
The zinc impregnation processing method of steel sleeper of the present invention and steel sleeper, scientific formulation, step is simple, compared with prior art, has following several respects advantage:
1, steel sleeper of the present invention top layer is one deck zinc-iron intermetallic compounds layer, this stratification compound and matrix steel sleeper be with metallurgical mode in conjunction with (atom mutual diffusion and the combination that forms mutually between the interface of two metals, this combination be connection state, under the effect of temperature or pressure, form under the temperature and pressure acting in conjunction.), thereby have superpower sticking power, even under operating modes such as high-frequency vibration, high speed impact, atrocious weather and artificial destruction, also can keep excellent antiseptic property.
2, added the rare earth composite powder end in the penetration enhancer that the present invention adopts, added the last zincizing technology of rare earth composite powder and compare with traditional technology, the zincizing time shortens, coating compactness is strengthened and erosion resistance improves.Existing research thinks that the effect of cerium oxide is activation steel sleeper surface, thereby the diffusion process of accelerating zinc atom is saved the hot-work time; The effect of lanthanum trioxide then is the structure that influences the zinc-iron intermetallic compound, discovers that the zinc-iron intermetallic compound structure behind the interpolation lanthanum trioxide is fine and close more, and then improves the impelling strength (improving anti-gravel impact capacity) of corrosion resistance nature and zinc-iron alloy layer.
The experiment proved that 3, the steel sleeper of a kind of micro-nano composite powder zinc impregnation processing treatment of the present invention still keeps excellent properties after actual environment was on active service 2 years, increased erosion resistance compared to existing technology greatly.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one:
The steel sleeper of a kind of micro-nano composite powder zinc impregnation processing treatment of the present invention comprises steel sleeper surface pre-treatment, steel sleeper surface zincizing processing and steel sleeper surface aftertreatment.
Steel sleeper surface pre-treatment comprises: to surface degreasing, rust cleaning, washing and the drying treatment of steel sleeper.Adopt Solvent degreasing, electrochemical deoiling, mechanical oil removing or wiping oil removing commonly used; Surface derusting adopts common chemical pickling or mechanical rust removal method, as roll cast, scrub, mechanical means such as sandblast or shot-peening.Steel sleeper behind the degreasing and rust removal obtains cleaning surfaces, exsiccant steel sleeper member after by washing and drying.
The zincizing processing of steel sleeper surface comprises: (1) is that 200 orders, zinc content are 99% zinc powder and nano composite rare earth (CeO with granularity
2And La
2O
3) powder mixes, nano composite rare earth powder CeO
2And La
2O
3Weight ratio be 2: 1, the particle size diameter scope is 65nm～455nm, mean particle size is 110nm, wherein granularity is 70% less than the volume content of the powder of 110nm, its consumption is 5% of a zinc powder weight, mixed powder was 25 ℃ of following refinement milled processed of room temperature 16 hours, and being ground to powder size is 200～300 orders, then ground compound zinc powder, activator ammonium chloride and weighting agent quartz sand is mixed by following consumption: the ammonium chloride consumption is 0.1% of a zincizing agent weight; Quartz sand size is 40～100 orders, and the volume sum of its volume and compound zinc powder volume and workpiece equals 90% of zincizing tank volume.(2) the zincizing jar that steel sleeper and zincizing agent will be housed is placed in the Sherardizing furnace and heats, and the zincizing jar is with 7～15 rev/mins rotating speed rotation heating, and the heating-up time was controlled in 2.0～2.5 hours, when temperature is elevated to 300 ℃, kept homo(io)thermism 80 minutes.(3) treat that Sherardizing furnace is cooled to 100 ℃ after, the zincizing jar is hung out from Sherardizing furnace, carry out air cooling, treat that temperature is lower than below 50 ℃ after, take out steel sleeper and his-and-hers watches top blast and sweep, carry out aftertreatment then.
The aftertreatment of steel sleeper surface comprises: flushing, polished finish, Passivation Treatment and dry processing.Adopt 15% nitric acid to carry out chemical rightenning 10～25 seconds so that remove the black oxide or the remaining zinc powder of component surface, after the polishing immediately water acid is cleaned up; Carry out Passivation Treatment with chromic acid or chromatedsolution, to improve infiltration layer corrosion resistance or surface smoothness.
The thickness that experiment showed, the resulting steel sleeper zincizing of present embodiment coating is 40 microns, and hardness is 220HV, and the shock strength of zincizing coating improves (250J/cm
2), promptly fragility descends, and toughness improves.
Embodiment two:
The steel sleeper of a kind of micro-nano composite powder zinc impregnation processing treatment of the present invention comprises steel sleeper surface pre-treatment, steel sleeper surface zincizing processing and steel sleeper surface aftertreatment.
Steel sleeper surface pre-treatment comprises: the surface to steel sleeper is carried out oil removing, rust cleaning, washing and drying treatment successively.
Steel sleeper surface zincizing adds body of tool and comprises: (1) is that 250 orders, zinc content are 98% zinc powder and nano composite rare earth (CeO with granularity
2And La
2O
3) powder mixes, nano composite rare earth powder CeO
2And La
2O
3Weight ratio be 1: 1, the particle size diameter scope is 65nm～455nm, mean particle size is 110nm, wherein granularity is 60% less than the volume content of the powder of 110nm, its consumption is 8% of a zinc powder weight, mixed powder was 25 ℃ of following refinement milled processed of room temperature 22 hours, and being ground to powder size is 200～300 orders, then ground compound zinc powder, activator ammonium chloride and weighting agent quartz sand is mixed by following consumption: the ammonium chloride consumption is 0.2% of a zincizing agent weight; Quartz sand size is 40～100 orders, and the volume sum of its volume and compound zinc powder volume and workpiece equals 92% of zincizing tank volume.(2) the zincizing jar that steel sleeper and zincizing agent will be housed is placed in the Sherardizing furnace and heats, and the zincizing jar is with 7～15 rev/mins rotating speed rotation heating, and the heating-up time was controlled in 2.0～2.5 hours, when temperature is elevated to 350 ℃, kept homo(io)thermism 80 minutes.(3) treat that Sherardizing furnace is cooled to 100 ℃ after, the zincizing jar is hung out from Sherardizing furnace, carry out air cooling, treat that temperature is lower than below 50 ℃ after, take out steel sleeper and his-and-hers watches top blast and sweep, carry out steel sleeper surface aftertreatment then.
The aftertreatment of steel sleeper surface comprises successively: flushing, polished finish, Passivation Treatment and dry processing.
The thickness that experiment showed, the resulting steel sleeper zincizing of present embodiment coating is 100 microns, and hardness is 250HV, and the shock strength of zincizing coating improves (240J/cm
2), promptly fragility descends, and toughness improves.
Embodiment three:
The steel sleeper of a kind of micro-nano composite powder zinc impregnation processing treatment of the present invention mainly comprises steel sleeper surface pre-treatment, steel sleeper surface zincizing processing and steel sleeper surface aftertreatment.
Steel sleeper surface pre-treatment comprises: the surface to steel sleeper is carried out oil removing, rust cleaning, washing and drying treatment successively.
Steel sleeper surface zincizing adds body of tool and comprises: (1) is that 300 orders, zinc content are 98% zinc powder and nano composite rare earth (CeO with granularity
2And La
2O
3) powder mixes, nano composite rare earth powder CeO
2And La
2O
3Weight ratio be 1: 2, the particle size diameter scope is 65nm～455nm, mean particle size is 110nm, wherein granularity is 60% less than the volume content of the powder of 110nm, its consumption is 10% of a zinc powder weight, mixed powder was 25 ℃ of following refinement milled processed of room temperature 24 hours, and being ground to powder size is 200～300 orders, then ground compound zinc powder, activator ammonium chloride and weighting agent quartz sand is mixed by following consumption: the ammonium chloride consumption is 0.3% of a zincizing agent weight; Quartz sand size is 40～100 orders, and the volume sum of its volume and compound zinc powder volume and workpiece equals 95% of zincizing tank volume.(2) the zincizing jar that steel sleeper and zincizing agent will be housed is placed in the Sherardizing furnace and heats, and the zincizing jar is with 7～15 rev/mins rotating speed rotation heating, and the heating-up time was controlled in 2.0～2.5 hours, when temperature is elevated to 380 ℃, kept homo(io)thermism 80 minutes.(3) treat that Sherardizing furnace is cooled to 100 ℃ after, the zincizing jar is hung out from Sherardizing furnace, carry out air cooling, treat that temperature is lower than below 50 ℃ after, take out steel sleeper and his-and-hers watches top blast and sweep, carry out aftertreatment then.
The aftertreatment of steel sleeper surface comprises successively: flushing, polished finish, Passivation Treatment and dry processing.
The thickness that experiment showed, the resulting steel sleeper zincizing of present embodiment coating is 50 microns, and hardness is 200HV, and the shock strength of zincizing coating improves (260J/cm
2), promptly fragility descends, and toughness improves.
Reference examples
Adopt steel sleeper surface pre-treatment and the steel sleeper surface post-treating method identical with embodiment four, different with embodiment four is: steel sleeper surface zincizing is processed concrete steps and comprised: (1) is that 120 orders, zinc content are 99% zinc powder and nano composite rare earth CeO with granularity
2Powder mixes, nano composite rare earth powder size diameter range is 65nm～455nm, mean particle size is 110nm, wherein granularity is 60% less than the volume content of the powder of 110nm, its consumption is 10% of a zinc powder weight, mixed powder was 25 ℃ of following refinement milled processed of room temperature 24 hours, and being ground to powder size is 200～300 orders, then ground compound zinc powder, activator ammonium chloride and weighting agent quartz sand is mixed by following consumption: the ammonium chloride consumption is 0.3% of a zincizing agent weight; Quartz sand size is 40～100 orders, and the volume sum of its volume and compound zinc powder volume and workpiece equals 95% of zincizing tank volume.(2) the zincizing jar that steel sleeper and zincizing agent will be housed is placed in the Sherardizing furnace and heats, and the zincizing jar is with 7～15 rev/mins rotating speed rotation heating, and the heating-up time was controlled in 2.0～2.5 hours, when temperature is elevated to 380 ℃, kept homo(io)thermism 80 minutes.(3) treat that Sherardizing furnace is cooled to 100 ℃ after, the zincizing jar is hung out from Sherardizing furnace, carry out air cooling, treat that temperature is lower than below 50 ℃ after, take out steel sleeper and his-and-hers watches top blast and sweep, carry out the steel sleeper aftertreatment then.
Experiment showed, that the resulting steel sleeper zincizing of this reference examples coating hardness is 200HV, the shock strength of zincizing coating is 180J/cm
2
Embodiment four
Present embodiment obtains a kind of steel sleeper and is prepared from by the zinc impregnation processing method of any one steel sleeper among the embodiment one to three.
The steel sleeper of above-mentioned three kinds of embodiment zincing methods preparation is tested on the high-speed train track of Chinese Tangshan, test that a small amount of rusty stain only appears in the steel sleeper surface after 2 years, and a large amount of corrosions has appearred in the steel sleeper of the zinc-rich coating technical finesse of adopting under the identical operating mode, and a small amount of localized cracks has appearred in the steel sleeper surface zinc-iron alloy layer that adopts reference examples to handle.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. the zinc impregnation processing method of a steel sleeper comprises: steel sleeper surface pre-treatment, steel sleeper surface zincizing processing and steel sleeper surface aftertreatment is characterized in that the zincizing processing of described steel sleeper surface comprises the steps:
(1) preparation zincizing agent: zinc powder, rare earth composite powder end, activator and weighting agent are carried out the refinement milled processed after by a certain amount of mixing,
Described zinc powder particle size is 200～300 orders;
Described rare earth composite powder end comprises nano-cerium oxide and nano lanthanum oxide, and consumption is 2%～10% of a zinc powder weight;
The consumption of described activator is 0.1～0.3% of a zincizing agent weight; The particle size diameter scope is 65nm～455nm;
The volume sum of described weighting agent, compound zinc powder and steel sleeper equals 90%～95% of zincizing tank volume;
(2) zincizing is handled: steel sleeper member and the zincizing agent for preparing are filled in the zincizing jar, to load good zincizing jar then and be placed on heat temperature raising in the Sherardizing furnace, zincizing jar upset heating, make the steel sleeper thermally equivalent in the zincizing jar, the heat temperature raising time was controlled in 2～2.5 hours, when temperature reaches 300～420 ℃, kept homo(io)thermism 50～120 minutes;
(3) steel sleeper cooling: after zincizing was finished dealing with, the zincizing jar was cooled to below 100 ℃ the zincizing jar be taken out from Sherardizing furnace with Sherardizing furnace, continued to be cooled to temperature and was lower than 50 ℃, and steel sleeper is separated with zincizing agent.
2. the zinc impregnation processing method of steel sleeper according to claim 1 is characterized in that, the zincizing processing of described steel sleeper surface comprises the steps:
(1) preparation zincizing agent: zinc powder, rare earth composite powder end, activator and weighting agent are carried out the refinement milled processed after by a certain amount of mixing,
Zinc content is greater than 98% in the described zinc powder, and granularity is 200～300 orders;
Described rare earth composite powder end comprises nano-cerium oxide and nano lanthanum oxide, and consumption is 5%～8% of a zinc powder weight;
The consumption of described activator is 0.16～0.2% of a zincizing agent weight; The particle size diameter scope is 65nm～455nm;
The volume sum of described weighting agent, compound zinc powder and steel sleeper equals 92%～95% of zincizing tank volume;
(2) zincizing is handled: steel sleeper member and the zincizing agent for preparing are filled in the zincizing jar, to load good zincizing jar then and be placed on heat temperature raising in the Sherardizing furnace, the zincizing jar is with the heating of overturning of 7～15 rev/mins rotating speed, make the steel sleeper thermally equivalent in the zincizing jar, the heat temperature raising time was controlled in 2～2.5 hours, when temperature reaches 300～420 ℃, kept homo(io)thermism 60～90 minutes; Form the zinc-iron intermetallic compound on the steel sleeper top layer, this stratification compound and matrix steel sleeper are with metallurgical mode combination;
(3) steel sleeper cooling: after zincizing was finished dealing with, the zincizing jar was cooled to below 100 ℃ the zincizing jar be taken out from Sherardizing furnace with Sherardizing furnace, continued to be cooled to temperature and was lower than 50 ℃, and steel sleeper is separated with zincizing agent.
3. the zinc impregnation processing method of steel sleeper according to claim 1 and 2 is characterized in that, the part by weight of nano-cerium oxide and nano lanthanum oxide is 1: 0.3～3 in the described rare earth composite powder end.
4. the zinc impregnation processing method of steel sleeper according to claim 3 is characterized in that, described rare earth
The part by weight of nano-cerium oxide and nano lanthanum oxide is 1: 1～2 in the composite powder.
5. the zinc impregnation processing method of steel sleeper according to claim 3 is characterized in that, the mean particle size at described rare earth composite powder end is 110nm, and wherein granularity is not less than 50% less than the powder volume content of 110nm.
6. the zinc impregnation processing method of steel sleeper according to claim 1 and 2 is characterized in that, described activator is ammonium chloride or zinc chloride.
7. the zinc impregnation processing method of steel sleeper according to claim 1 and 2 is characterized in that, described weighting agent is quartz sand or aluminum oxide.
8. a steel sleeper is characterized in that, is processed by the zinc impregnation processing method of any described steel sleeper of claim 1-7.
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| CN103952661A (en) * | 2014-04-29 | 2014-07-30 | 西安理工大学 | Solid zincizing agent and preparation method thereof |
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| RU2557045C1 (en) * | 2014-07-29 | 2015-07-20 | Общество с ограниченной ответственностью "Полимерпром" | Thermodiffusion zinc coating |
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