CN102363875A - Hot dip galvanizing method of steel structural members - Google Patents
Hot dip galvanizing method of steel structural members Download PDFInfo
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- CN102363875A CN102363875A CN2011103310063A CN201110331006A CN102363875A CN 102363875 A CN102363875 A CN 102363875A CN 2011103310063 A CN2011103310063 A CN 2011103310063A CN 201110331006 A CN201110331006 A CN 201110331006A CN 102363875 A CN102363875 A CN 102363875A
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Abstract
The invention relates to a hot dip galvanizing method of steel structural members, comprising the following steps of: 1) preparing before galvanization; 2) degreasing; 3) cleaning degreased raffinate; 4) pickling; 5) cleaning pickled raffinate; 6) activating a steel structural member matrix; 7) applying a plating-assistant solvent; 8) drying the moisture in the plating-assistant solvent; 9) hot dip galvanizing; 10) cooling in the air and removing residual zinc; 11) cooling in water; 12) drying the moisture; and 13) examining. The invention further provides the relative component formula of various treatment fluids used during the galvanizing process in the above method, and provides the most ideal working condition parameters in each step of the galvanizing process. Processed by the hot dip galvanizing technology, the steel structural members have advantages of excellent integrity of the coating, high bonding strength, flat and smooth appearance and high qualified rate of products.
Description
Technical field
The invention belongs to the anticorrosive metal field of surface engineering technique, relate in particular to a kind of steel structural part hot dip galvanizing process.
Background technology
At present, a kind of traditional steel structural part method of hot-dip galvanizing is arranged the dry out solvent method.It is after earlier steel structural part being carried out the decontamination, processing of rust removing on surface, again steel structural part is immersed in helping in the plating solvent that we know, makes the structural part surface help the plating solvent in the dip-coating fully; Again steel structural part is taken out; Dry its surperficial moisture content, then steel structural part is immersed in the pure zinc solution after the fusing, take out behind the certain hour; At last steel structural part is put into water and cool off, the whole process of galvanizing finishes.Because galvanizing process is simple in the above background technology, lacks necessary process steps, help in plating solvent, the pure zinc liquid to lack corresponding additive; Lack the regulation to each step working conditions in the whole galvanizing process, so the zinc-plated effect of steel structural part is bad, coating is coarse; Dross; Local plating leakage, base steel combines not firm with coating, and product percent of pass is low.
Summary of the invention
For overcoming the various shortcomings of steel structural part hot dip galvanizing method in the prior art; The present invention provides a kind of coating good in integrity; Conjugation is high, and coating surface is level and smooth, the hot dip galvanizing method that product percent of pass is high; And the relevant component prescription of the various treatment solutions of using in the galvanizing process further is provided in this method, optimal working conditions parameter in each step of galvanizing process is provided.
The present invention is for solving the problems of the technologies described above, and the technical scheme of being taked is:
A kind of steel structural part hot dip galvanizing method is characterized in that the basic procedure of hot-dip galvanizing technique is:
1) prepares before the plating: steel structural part is carried out the platability identification, material mark, chemical ingredients, shape and structure etc. are checked, remove steel structural part surface paint in advance, dirt and bur etc.;
2) skimming treatment: utilize degreasing fluid that steel structural part is carried out skimming treatment, remove its surface and oil contaminant, lipid impurity;
Preferably, said degreasing fluid by sodium hydroxide, the yellow soda ash of 20-30g/L, 8-10g/L tsp, the 4-5g/L water glass of 40-50g/L, TX-10 is formulated for the 2-4g/L tensio-active agent, wherein the degreasing fluid temperature is controlled at 80-90 ℃, PH >=13.
3) cleaning and degreasing raffinate: the degreasing fluid to the steel structural part remained on surface cleans;
4) pickling: put into the hydrochloric acid soln of 20-25% to the steel structural part after the skimming treatment, remove its surperficial rusty stain and zone of oxidation;
Preferably, hydrochloric acid soln contains the iron protochloride FeCl that initial value is 50-80g/L
2
5) clean the pickling raffinate: the steel structural part after the cleaning pickling, the pickle solution of removal remained on surface;
6) activation steel structural part matrix: the normal temperature dilute hydrochloric acid solution with 50-60g/L is further handled steel structural part, and precision is cleaned, activation steel structural part surface matrix, and the treatment time is 30-60 second;
7) be coated with and help the plating solvent: the steel structural part after the activation is put into helped in the plating solvent, dip-coating 1-3 minute, make the steel structural part surface evenly be coated with last layer and help the plating solvent;
Preferably, the said plating solvent that helps is formulated by the industrial zinc chloride of the industrial ammonium chloride of 160-200g/L and 80-120g/L, wherein helps to plate solvent temperature and be controlled at 65-75 ℃, and pH value is controlled between the 4.5-6.5, and treatment solution density is controlled at 1.1-1.2g/cm
3Between, help its iron protochloride FeCl behind the plating solvent treatment steel structural part
2Content be no more than 5g/L all the time.
8) oven dry helps moisture content in the plating solvent: with helping the steel structural part that crosses solvent to dry processing in the dip-coating, remove the moisture content of its surface attachment;
9) galvanizing: help dip-coating the steel structural part that crosses solvent to be immersed in the fused zinc-base liquid well, it is carried out galvanizing handle;
Preferably, zinc-base liquid is the aluminium that in pure zinc is bathed, adds 0.008-0.018%, adds the nickel of 0.01-0.05%, and wherein aluminium is to add in the pure zinc bath with the mode of aluminium zinc, and the percentage composition of aluminium is 5% in the aluminium zinc; Nickel is to add in the pure zinc bath with the mode of admiro, and the percentage composition of nickel is 1% in the admiro;
Preferably; The above-mentioned zinc-aluminium that contains; The zinc-base liquid temp of admiro is controlled between 455 ℃ ± 5 ℃; Steel structural part is put in the above-mentioned zinc-base liquid to soak after 1-5 minute and is slowly proposed, its propose speed control 1-1.5 rice/minute, plating piece gross weight wherein hourly is smaller or equal to 2.5% of zinc-base liquid weight in the pot.
10) cooling and remove surplus zinc in the air: after from 455 ℃ ± 5 ℃ zinc-base liquid, proposing steel structural part, be positioned over and slowly cool in the air about 200 ℃, and utilize zinc-base liquid self gravitation, remove the surperficial unnecessary zinc-base liquid of steel structural part;
11) cool off in the water: put into 40 ℃ of-60 ℃ of water to about 200 ℃ steel structural part, continue after the cooling several seconds it to be left the water;
12) oven dry moisture content: after steel structural part takes out from water, still have about 100 ℃-150 ℃, self surplus temperature can be dried its surperficial moisture content automatically;
13) check: whether the quality that detects outward appearance, thickness of coating and the adherence of coating of steel structural part surface galvanizing layer meets correlation standard.
According to the steel structural part that above-mentioned hot-dip galvanizing technique was handled, its coating integrity is good, and bonding strength is high, and flat appearance is smooth, and product percent of pass is high, meets the relevant national standard regulation fully.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer, below in conjunction with specific embodiment embodiment of the present invention is carried out detailed, bright specifically.
The present invention provides a kind of novel steel structural part hot dip galvanizing method, and it comprises the steps:
1) prepares before the plating: steel structural part is carried out the platability identification, material mark, chemical ingredients, shape and structure etc. are checked, remove steel structural part surface paint in advance, dirt and bur etc.;
2) skimming treatment: utilize degreasing fluid that steel structural part is carried out skimming treatment, remove its surface and oil contaminant, lipid impurity;
3) cleaning and degreasing raffinate: the degreasing fluid to the steel structural part remained on surface cleans;
4) pickling: put into the hydrochloric acid soln of 20-25% to the steel structural part after the skimming treatment, remove its surperficial rusty stain and zone of oxidation, wherein containing initial value in the hydrochloric acid soln is the iron protochloride FeCl of 50-80g/L
2
In concentration is to add an amount of iron protochloride FeCl in the hydrochloric acid soln of 20-25%
2, can effectively accelerate the pickling speed of steel structural part, improve pickling efficient.Experiment showed, iron protochloride FeCl in the hydrochloric acid soln of an amount of concentration
2When initial value content is zero, the pickling speed of steel structural part is starkly lower than contains an amount of iron protochloride FeCl
2Hydrochloric acid soln.
5) clean the pickling raffinate: the steel structural part after the cleaning pickling, the pickle solution of removal remained on surface;
6) activation steel structural part matrix: the normal temperature dilute hydrochloric acid solution with 50-60g/L is further handled steel structural part, and precision is cleaned, activation steel structural part surface matrix, and the treatment time is 30-60 second;
Like this; Steel structural part cleans through the further precision of the normal temperature Hydrogen chloride of an amount of concentration, makes its surface cleaner, smooth; The non-oxidation layer; Played the effect of activation steel structural part surface matrix, made and help the plating solvent to contact with the steel structural part surface enough fully, thereby obtain better adhesion property with the zinc-base fluid power.
7) be coated with and help the plating solvent: the steel structural part after the activation is put into helped in the plating solvent, dip-coating 1-3 minute, make the steel structural part surface evenly be coated with last layer and help the plating solvent;
8) oven dry helps moisture content in the plating solvent: with helping the steel structural part that crosses solvent to dry processing in the dip-coating, remove the moisture content of its surface attachment;
9) galvanizing: in pure zinc is bathed, add the aluminium of 0.008-0.018%, add the nickel of 0.01-0.05%, wherein aluminium is to add in the pure zinc bath with the mode of aluminium zinc, and the percentage composition of aluminium is 5% in the aluminium zinc; Nickel is to add in the pure zinc bath with the mode of admiro, and the percentage composition of nickel is 1% in the admiro.The above-mentioned zinc-aluminium that contains; The zinc-base liquid temp of the molten state of admiro is controlled between 455 ℃ ± 5 ℃; Be immersed into immersion slowly proposition after 1-5 minute in the above-mentioned zinc-base liquid to steel structural part; Its propose speed control 1-1.5 rice/minute, plating piece gross weight wherein hourly is smaller or equal to 2.5% of zinc-base liquid weight in the pot;
Here, we are to the content of aluminium, nickel in the zinc-base liquid, and various operational conditions, parameter have been done strict regulation, and they all can directly influence the quality of the zinc-plated effect of steel structural part.Mode with aluminium zinc, admiro in pure zinc-base liquid adds aluminium, nickel, rather than adds with the mode of aluminium ingot, nickel ingot, can prevent effectively that like this aluminium, nickel are present in the zinc-base liquid in a certain subrange for a long time; Cause aluminium, the local too high shortcoming of nickel concentration; Aluminium, nickel are diffused in the zinc-base liquid fast, uniformly, give full play to it and improve the equal and property of coating, remove iron; It is uneven to improve the coating color and luster, improves the mobile effect of zinc-base liquid.Plating piece gross weight wherein hourly should not be above 2.5% of zinc-base liquid weight in the pot, and controlling its disposable zinc-plated amount can not be too much, and steel structural part is fully contacted with zinc-base liquid completely, guarantees zinc-plated respond well.
10) cooling and remove surplus zinc in the air: after from 455 ℃ ± 5 ℃ zinc-base liquid, proposing steel structural part, be positioned over and slowly cool in the air about 200 ℃, and utilize zinc-base liquid self gravitation, remove the surperficial unnecessary zinc-base liquid of steel structural part;
Here; We slowly cool off the steel structural part that from zinc-base liquid, proposes in air earlier, do not carry out cool quickly in the water and directly be positioned over, and are because too fast cooling steel structural part makes coating surface coarse easily; Rough, form the orange peel form.
11) cool off in the water: put into 40 ℃ of-60 ℃ of water to about 200 ℃ steel structural part, continue after the cooling several seconds it to be left the water;
12) oven dry moisture content: after steel structural part takes out from water, still have about 100 ℃-150 ℃, self surplus temperature can be dried its surperficial moisture content automatically;
13) check: detect steel structural part surface galvanizing layer flat appearance, smooth, thickness of coating is even, and adherence of coating is good, meets correlation standard fully.
Said step 2) in the skimming treatment technology degreasing fluid by sodium hydroxide, the yellow soda ash of 20-30g/L, 8-10g/L tsp, the 4-5g/L water glass of 40-50g/L, TX-10 is formulated for the 2-4g/L tensio-active agent; Wherein the degreasing fluid temperature is controlled at 80-90 ℃, PH >=13.
The results showed that we add an amount of tensio-active agent TX-10 in the degreasing fluid prescription, the more effective performance hydroxide radical of ability and carbonate and greasy dirt bonded ability, tensio-active agent TX-10 plays important catalysis, booster action.The degreasing fluid that adds proper amount of surfactant TX-10 has better degreasing, clean effect to steel structural part.
Help the plating solvent formulated by the industrial zinc chloride of the industrial ammonium chloride of 160-200g/L and 80-120g/L in the said step 7), wherein help and plate solvent temperature and be controlled at 65-75 ℃, pH value is controlled between the 4.5-6.5, and treatment solution density is controlled at 1.1-1.2g/cm
3Between, help its iron protochloride FeCl behind the plating solvent treatment steel structural part
2Content be no more than 5g/L all the time.
Here; Various technological parameters had been done strict regulation when we plated the solvent treatment steel structural part to helping; Complete dip-coating helps the zinc-plated effect of plating behind the solvent to play crucial effects for steel structural part for this; Especially along with helping increasing of plating solvent treatment steel structural part amount, in solvent, can generate a certain amount of iron protochloride FeCl
2Confirm through test, as iron protochloride FeCl
2Content when surpassing 5g/L, will produce certain influence to helping the plating solvent, the steel structural part dip-coating such help the plating solvent after, will exert an influence to zinc-plated effect, plating leakage takes place, the rough phenomenon of local coating.So will controlling especially, we help iron protochloride FeCl in the plating solvent
2Content can not surpass 5g/L.
Embodiment 1
Hot dip galvanizing method of the present invention is applied on the motorway corrugated guardrail beam.
The zinc pot is contained zinc amount and volume: contain 60 tons on zinc, volume is about 11 cubic metres of 6m*1.2m*1.5m.
Following to freeway guardrail beam method of hot-dip galvanizing:
1) prepares before the plating: the guardrail beam is carried out the platability identification; Material mark, chemical ingredients, shape and structure etc. are checked; Learn that guardrail beam material is Q195, the physical dimension of guardrail beam is: the high 85mm* thickness of slab of the wide 315mm* of long 4320mm* 3mm, single-piece weighs 50 kilograms.Remove guardrail beam surface paint, dirt and bur etc.;
2) skimming treatment: at first prepare degreasing fluid; Put into the guardrail beam by carrying out skimming treatment in the formulated degreasing fluid of sodium hydroxide, the yellow soda ash of 20g/L, 8g/L tsp, 4g/L water glass, the 2g/L tensio-active agent TX-10 of 40g/L; Wherein the degreasing fluid temperature is 80 ℃; PH equals 13, removes guardrail beam surface and oil contaminant, lipid material;
3) cleaning and degreasing raffinate: from degreasing fluid, pull the guardrail beam out, the degreasing fluid of guardrail beam remained on surface is cleaned.Guardrail beam after inspection is cleaned finds that the degreasing fluid that has added proper amount of surfactant TX-10 prescription is high to guardrail beam surface and oil contaminant clearance, effective;
4) pickling: the guardrail beam after the skimming treatment put into 20% and initial value contain the iron protochloride FeCl of 50g/L
2Hydrochloric acid soln in, remove its surperficial rusty stain and zone of oxidation.Owing to contain an amount of iron protochloride FeCl of initial value in the pickle solution
2, make the pickling time shorten to about about 22 minutes greatly and get final product;
5) clean the pickling raffinate: the guardrail beam after the cleaning pickling, the pickle solution of removal remained on surface;
6) activation steel structural part matrix: the normal temperature dilute hydrochloric acid solution with 50g/L is further handled the guardrail beam, and precision is cleaned, activation guardrail beam surface matrix, 60 seconds treatment times.Find that on inspection guardrail beam surface is cleaner, and is smooth, no rusty stain and grey black, and make guardrail beam surface demonstrate active condition, follow-up help plating solvent and zinc-plated base fluid can be contacted with guardrail beam surface fully, thereby obtain better adhesion property;
7) be coated with and help the plating solvent: the guardrail beam after the activation is put into helped in the plating solvent, wherein helping the plating solvent is the aqueous solution of industrial zinc chloride that contains industrial ammonium chloride and the 80g/L of 160g/L, and help the temperature of plating solvent this moment is 65 ℃, and pH value is 6.5, and density is 1.1g/cm
3, guardrail beam dip-coating processing in helping the plating solvent was removed after 180 seconds.Here, our strict monitoring helps iron protochloride FeCl in the plating solvent
2Content be no more than 5g/L, in case reach 5g/L, will to help the plating solvent remove iron protochloride FeCl
2Measure, guarantee that it is helping the permission content of plating in the solvent.
8) oven dry helps moisture content in the plating solvent: with helping the guardrail beam that crosses solvent to dry processing in the dip-coating, remove the moisture content of its surface attachment;
9) galvanizing: at first in 450 ℃ pure zinc is bathed, add aluminium content and account for 5% aluminium zinc and nickel content and account for 1% admiro, aluminium content is 0.008% in whole zinc-base liquid, and nickel content is 0.01%; Because aluminium, nickel in the zinc-base liquid are not with aluminium ingot; The mode of nickel ingot adds, but being that the mode of aluminium zinc, admiro adds, and is present in for a long time in the zinc-base liquid in a certain subrange so effectively prevented aluminium, nickel; Cause aluminium, the local too high shortcoming of nickel concentration; Aluminium, nickel are diffused in the zinc-base liquid fast, uniformly, have given full play to it and improved the equal and property of coating, remove iron; It is uneven to improve the coating color and luster, improves the mobile effect of zinc-base liquid.The gross weight of considering zinc-base liquid is 60 tons, and is zinc-plated respond well for guaranteeing, the guardrail beam can be contacted with zinc-base liquid fully, 8 on our each immersion plating guardrail beam, and 8*50kg is 400kg.Let the immersion plating in zinc-base liquid of guardrail beam after 60 seconds propose the guardrail beam, control proposition speed is 1m/s;
10) cooling and remove surplus zinc in the air: after from 450 ℃ zinc-base liquid, proposing the guardrail beam, be positioned in the air slowly cooling 5 minutes, to about 200 ℃, and utilize zinc-base liquid self gravitation, remove the surperficial unnecessary zinc-base liquid of guardrail beam.Here, we slowly cool off the guardrail beam that from zinc-base liquid, proposes in air earlier, do not carry out cool quickly in the water and directly be positioned over, and are because too fast cooling can make guardrail beam overlay coating coarse, rough, form the orange peel form;
11) cool off in the water: put into 40 ℃ warm water to the guardrail beam about 200 ℃, continue cooling after 42 seconds, it is left the water;
12) oven dry moisture content: after the guardrail beam takes out from water, still have about 100 ℃, self surplus temperature can be dried its surperficial moisture content automatically;
13) check: detect guardrail beam outward appearance, its surface smoothing, no dross, no burr, no plating leakage.Thickness of coating is 86 microns.Through the tack check, coating is not peeled off, not projection.
Embodiment 2
Hot dip galvanizing method of the present invention is applied on the hot-water heating pipe fitting of building trade.
The zinc pot is contained zinc amount and volume: contain 60 tons on zinc, volume is about 11 cubic metres of 6m*1.2m*1.5m.
Following to hot-water heating pipe fitting method of hot-dip galvanizing:
1) prepare before the plating: the hot-water heating pipe fitting is carried out the platability identification, and material mark, chemical ingredients, shape and structure etc. are checked that the physical dimension of hot-water heating pipe fitting is: the high 85mm of the wide 315mm* of long 2320mm*, single-piece weighs 50 kilograms.Remove hot-water heating pipe fitting surface paint, dirt and bur etc.;
2) skimming treatment: at first prepare degreasing fluid; Put into the hot-water heating pipe fitting by carrying out skimming treatment in the formulated degreasing fluid of sodium hydroxide, the yellow soda ash of 23g/L, 8.5g/L tsp, 4.5g/L water glass, the 2.5g/L tensio-active agent TX-10 of 43g/L; Wherein the degreasing fluid temperature is 83 ℃; PH equals 13.5, removes hot-water heating pipe fitting surface and oil contaminant, lipid material;
3) cleaning and degreasing raffinate: from degreasing fluid, pull the hot-water heating pipe fitting out, the degreasing fluid of hot-water heating pipe fitting remained on surface is cleaned.Hot-water heating pipe fitting after inspection is cleaned finds that the degreasing fluid that has added proper amount of surfactant TX-10 prescription is high to hot-water heating pipe fitting surface and oil contaminant clearance, effective;
4) pickling: the hot-water heating pipe fitting after the skimming treatment put into 22% and initial value contain the iron protochloride FeCl of 60g/L
2Hydrochloric acid soln in, remove its surperficial rusty stain and zone of oxidation.Owing to contain an amount of iron protochloride FeCl of initial value in the pickle solution
2, make the pickling time shorten to about about 20 minutes greatly and get final product;
5) clean the pickling raffinate: the hot-water heating pipe fitting after the cleaning pickling, the pickle solution of removal remained on surface;
6) activation steel structural part matrix: the normal temperature dilute hydrochloric acid solution with 53g/L is further handled the hot-water heating pipe fitting, and precision is cleaned, activated water heating coil spare surface matrix, 50 seconds treatment times.Find that on inspection hot-water heating pipe fitting surface is cleaner, and is smooth; No rusty stain and grey black; And make hot-water heating pipe fitting surface demonstrate active condition, follow-up help plating solvent and zinc-plated base fluid can be contacted with hot-water heating pipe fitting surface fully, thereby obtain better adhesion property;
7) be coated with and help the plating solvent: the hot-water heating pipe fitting after the activation is put into helped in the plating solvent; Wherein helping the plating solvent is the aqueous solution of industrial zinc chloride that contains industrial ammonium chloride and the 90g/L of 180g/L; Helping the temperature of plating solvent this moment is 68 ℃, and pH value is 6, and density is 1.13g/cm
3, hot-water heating pipe fitting dip-coating processing in helping the plating solvent was removed after 130 seconds.Here, our strict monitoring helps iron protochloride FeCl in the plating solvent
2Content be no more than 5g/L, in case reach 5g/L, will to help the plating solvent remove iron protochloride FeCl
2Measure, guarantee that it is helping the permission content of plating in the solvent.
8) oven dry helps moisture content in the plating solvent: with helping the hot-water heating pipe fitting that crosses solvent to dry processing in the dip-coating, remove the moisture content of its surface attachment;
9) galvanizing: at first in 453 ℃ pure zinc is bathed, add aluminium content and account for 5% aluminium zinc and nickel content and account for 1% admiro, aluminium content is 0.012% in whole zinc-base liquid, and nickel content is 0.03%; Because aluminium, nickel in the zinc-base liquid are not with aluminium ingot; The mode of nickel ingot adds, but being that the mode of aluminium zinc, admiro adds, and is present in for a long time in the zinc-base liquid in a certain subrange so effectively prevented aluminium, nickel; Cause aluminium, the local too high shortcoming of nickel concentration; Aluminium, nickel are diffused in the zinc-base liquid fast, uniformly, have given full play to it and improved the equal and property of coating, remove iron; It is uneven to improve the coating color and luster, improves the mobile effect of zinc-base liquid.The gross weight of considering zinc-base liquid is 60 tons, and is zinc-plated respond well for guaranteeing, the hot-water heating pipe fitting can be contacted with zinc-base liquid fully, 8 of our each immersion plating hot-water heating pipe fittings, and 8*50kg is 400kg.Let the immersion plating in zinc-base liquid of hot-water heating pipe fitting after 150 seconds propose the hot-water heating pipe fitting, control proposition speed is 1.2m/s;
10) cooling and remove surplus zinc in the air: after from 453 ℃ zinc-base liquid, proposing the hot-water heating pipe fitting, be positioned in the air slowly cooling 5 minutes, to about 200 ℃, and utilize zinc-base liquid self gravitation, remove the surperficial unnecessary zinc-base liquid of hot-water heating pipe fitting.Here, we slowly cool off the hot-water heating pipe fitting that from zinc-base liquid, proposes in air earlier, do not carry out cool quickly in the water and directly be positioned over, and are because too fast cooling can make hot-water heating pipe fitting overlay coating coarse, rough, form the orange peel form;
11) cool off in the water: put into 48 ℃ warm water to the hot-water heating pipe fitting about 200 ℃, continue cooling after 40 seconds, it is left the water;
12) oven dry moisture content: after the hot-water heating pipe fitting takes out from water, still have about 120 ℃, self surplus temperature can be dried its surperficial moisture content automatically;
13) check: detect hot-water heating pipe fitting outward appearance, its surface smoothing, no dross, no burr, no plating leakage.Thickness of coating is 83 microns.Through the tack check, coating is not peeled off, not projection.
Embodiment 3
Hot dip galvanizing method of the present invention is applied on the another kind of hot-water heating pipe fitting of building trade.
The zinc pot is contained zinc amount and volume: contain 60 tons on zinc, volume is about 11 cubic metres of 6m*1.2m*1.5m.
Following to hot-water heating pipe fitting method of hot-dip galvanizing:
1) prepare before the plating: the hot-water heating pipe fitting is carried out the platability identification, and material mark, chemical ingredients, shape and structure etc. are checked that the physical dimension of hot-water heating pipe fitting is: the high 65mm of the wide 255mm* of long 2100mm*, single-piece weighs 40 kilograms.Remove hot-water heating pipe fitting surface paint, dirt and bur etc.;
2) skimming treatment: at first prepare degreasing fluid; Put into the hot-water heating pipe fitting by carrying out skimming treatment in the formulated degreasing fluid of sodium hydroxide, the yellow soda ash of 26g/L, 9.3g/L tsp, 4.8g/L water glass, the 3.3g/L tensio-active agent TX-10 of 47g/L; Wherein the degreasing fluid temperature is 86 ℃; PH equals 13.6, removes hot-water heating pipe fitting surface and oil contaminant, lipid material;
3) cleaning and degreasing raffinate: from degreasing fluid, pull the hot-water heating pipe fitting out, the degreasing fluid of hot-water heating pipe fitting remained on surface is cleaned.Hot-water heating pipe fitting after inspection is cleaned finds that the degreasing fluid that has added proper amount of surfactant TX-10 prescription is high to hot-water heating pipe fitting surface and oil contaminant clearance, effective;
4) pickling: the hot-water heating pipe fitting after the skimming treatment put into 24% and initial value contain the iron protochloride FeCl of 70g/L
2Hydrochloric acid soln in, remove its surperficial rusty stain and zone of oxidation.Owing to contain an amount of iron protochloride FeCl of initial value in the pickle solution
2, make the pickling time shorten to about about 19 minutes greatly and get final product;
5) clean the pickling raffinate: the hot-water heating pipe fitting after the cleaning pickling, the pickle solution of removal remained on surface;
6) activation steel structural part matrix: the normal temperature dilute hydrochloric acid solution with 56g/L is further handled the hot-water heating pipe fitting, and precision is cleaned, activated water heating coil spare surface matrix, 40 seconds treatment times.Find that on inspection hot-water heating pipe fitting surface is cleaner, and is smooth; No rusty stain and grey black; And make hot-water heating pipe fitting surface demonstrate active condition, follow-up help plating solvent and zinc-plated base fluid can be contacted with hot-water heating pipe fitting surface fully, thereby obtain better adhesion property;
7) be coated with and help the plating solvent: the hot-water heating pipe fitting after the activation is put into helped in the plating solvent; Wherein helping the plating solvent is the aqueous solution of industrial zinc chloride that contains industrial ammonium chloride and the 105g/L of 190g/L; Helping the temperature of plating solvent this moment is 72 ℃, and pH value is 5, and density is 1.16g/cm
3, hot-water heating pipe fitting dip-coating processing in helping the plating solvent was removed after 90 seconds.Here, our strict monitoring helps iron protochloride FeCl in the plating solvent
2Content be no more than 5g/L, in case reach 5g/L, will to help the plating solvent remove iron protochloride FeCl
2Measure, guarantee that it is helping the permission content of plating in the solvent.
8) oven dry helps moisture content in the plating solvent: with helping the hot-water heating pipe fitting that crosses solvent to dry processing in the dip-coating, remove the moisture content of its surface attachment;
9) galvanizing: at first in 456 ℃ pure zinc is bathed, add aluminium content and account for 5% aluminium zinc and nickel content and account for 1% admiro, aluminium content is 0.015% in whole zinc-base liquid, and nickel content is 0.04%; Because aluminium, nickel in the zinc-base liquid are not with aluminium ingot; The mode of nickel ingot adds, but being that the mode of aluminium zinc, admiro adds, and is present in for a long time in the zinc-base liquid in a certain subrange so effectively prevented aluminium, nickel; Cause aluminium, the local too high shortcoming of nickel concentration; Aluminium, nickel are diffused in the zinc-base liquid fast, uniformly, have given full play to it and improved the equal and property of coating, remove iron; It is uneven to improve the coating color and luster, improves the mobile effect of zinc-base liquid.The gross weight of considering zinc-base liquid is 60 tons, and is zinc-plated respond well for guaranteeing, the hot-water heating pipe fitting can be contacted with zinc-base liquid fully, 8 of our each immersion plating hot-water heating pipe fittings, and 8*40kg is 320kg.Let the immersion plating in zinc-base liquid of hot-water heating pipe fitting after 220 seconds propose the hot-water heating pipe fitting, control proposition speed is 1.3m/s;
10) cooling and remove surplus zinc in the air: after from 456 ℃ zinc-base liquid, proposing the hot-water heating pipe fitting, be positioned in the air slowly cooling 5 minutes, to about 200 ℃, and utilize zinc-base liquid self gravitation, remove the surperficial unnecessary zinc-base liquid of hot-water heating pipe fitting.Here, we slowly cool off the hot-water heating pipe fitting that from zinc-base liquid, proposes in air earlier, do not carry out cool quickly in the water and directly be positioned over, and are because too fast cooling can make hot-water heating pipe fitting overlay coating coarse, rough, form the orange peel form;
11) cool off in the water: put into 52 ℃ warm water to the hot-water heating pipe fitting about 200 ℃, continue cooling after 40 seconds, it is left the water;
12) oven dry moisture content: after the hot-water heating pipe fitting takes out from water, still have about 130 ℃, self surplus temperature can be dried its surperficial moisture content automatically;
13) check: detect hot-water heating pipe fitting outward appearance, its surface smoothing, no dross, no burr, no plating leakage.Thickness of coating is 86 microns.Through the tack check, coating is not peeled off, not projection.
Embodiment 4
Hot dip galvanizing method of the present invention is applied on electric power circuit member-angle bar.
The zinc pot is contained zinc amount and volume: contain 60 tons on zinc, volume is about 11 cubic metres of 6m*1.2m*1.5m.
Following to electric power circuit member-angle bar hot dip galvanizing method:
1) prepares before the plating: angle bar is carried out the platability identification, material mark, chemical ingredients, shape and structure etc. are checked that learn that the angle bar material is Q345, angle bar physical dimension is: long 5000mm*100mm*7mm, angle bar thickness 6mm.Remove angle bar surface paint, dirt and bur etc.;
2) skimming treatment: at first prepare degreasing fluid; Put into angle bar by carrying out skimming treatment in the formulated degreasing fluid of sodium hydroxide, the yellow soda ash of 30g/L, 10g/L tsp, 5g/L water glass, the 4g/L tensio-active agent TX-10 of 50g/L; Wherein the degreasing fluid temperature is 90 ℃; PH equals 13.6, removes the angle bar surface and oil contaminant, lipid material;
3) cleaning and degreasing raffinate: from degreasing fluid, pull angle bar out, iron surface residual degreasing fluid in diagonal angle cleans.Angle bar after inspection is cleaned finds that the degreasing fluid diagonal angle iron surface greasy dirt clearance of this prescription is high, effective;
4) pickling: the angle bar after the skimming treatment put into 25% and initial value contain the iron protochloride FeCl of 80g/L
2Hydrochloric acid soln in, remove its surperficial rusty stain and zone of oxidation.Owing to contain an amount of iron protochloride FeCl of initial value in the pickle solution
2So the pickling time shortens to about about 20 minutes and gets final product;
5) clean the pickling raffinate: the angle bar after the cleaning pickling, the pickle solution of removal remained on surface;
6) activation steel structural part matrix: the normal temperature dilute hydrochloric acid solution with 60g/L is further handled angle bar, and precision is cleaned, activation angle bar surface matrix, 30 seconds treatment times.Find that on inspection the angle bar surface is cleaner, and is smooth, no rusty stain and grey black, and the angle bar surface is active state make follow-up helping plate solvent and zinc-plated base fluid can contact with the angle bar surface fully, thereby obtain better adhesion property;
7) be coated with and help the plating solvent: the angle bar after the activation is put into helped in the plating solvent, wherein helping the plating solvent is the aqueous solution of industrial zinc chloride that contains industrial ammonium chloride and the 120g/L of 200g/L, and help the temperature of plating solvent this moment is 75 ℃, and pH value is 4.5, and density is 1.2g/cm
3, angle bar dip-coating processing in helping the plating solvent was removed after 60 seconds.Here, our strict monitoring helps iron protochloride FeCl in the plating solvent
2Content be no more than 5g/L, in case reach 5g/L, will to help the plating solvent remove iron protochloride FeCl
2Measure, guarantee that it is helping the permission content of plating in the solvent.
8) oven dry helps moisture content in the plating solvent: with helping the angle bar that crosses solvent to dry processing in the dip-coating, remove the moisture content of its surface attachment;
9) galvanizing: at first in 460 ℃ pure zinc is bathed, add aluminium content and account for 5% aluminium zinc and nickel content and account for 1% admiro, aluminium content is 0.018% in whole zinc-base liquid, and nickel content is 0.05%; Because aluminium, nickel in the zinc-base liquid are not with aluminium ingot; The mode of nickel ingot adds, but being that the mode of aluminium zinc, admiro adds, and is present in for a long time in the zinc-base liquid in a certain subrange so effectively prevented aluminium, nickel; Cause aluminium, the local too high shortcoming of nickel concentration; Aluminium, nickel are diffused in the zinc-base liquid fast, uniformly, have given full play to it and improved the equal and property of coating, remove iron; It is uneven to improve the coating color and luster, improves the mobile effect of zinc-base liquid.Let angle bar immersion plating in zinc-base liquid after 5 minutes propose angle bar, control proposition speed is 1.5m/s;
10) cooling and remove surplus zinc in the air: after from 460 ℃ zinc-base liquid, proposing angle bar, be positioned in the air slowly cooling 6 minutes, to about 200 ℃, and utilize zinc-base liquid self gravitation, remove the surperficial unnecessary zinc-base liquid of angle bar.Here, we slowly cool off the angle bar that from zinc-base liquid, proposes in air earlier, do not carry out cool quickly in the water and directly be positioned over, and are because too fast cooling can make the angle bar overlay coating coarse, rough, form the orange peel form;
11) cool off in the water: put into 60 ℃ warm water to the angle bar about 200 ℃, continue cooling after 40 seconds, it is left the water;
12) oven dry moisture content: after angle bar takes out from water, still have about 150 ℃, self surplus temperature can be dried its surperficial moisture content automatically;
13) check: detect the angle bar outward appearance, its surface smoothing, no dross, good brightness, no plating leakage.Thickness of coating is the 85-91 micron.Through the tack check, coating is not peeled off, hammering experiment back coating depression.
Claims (9)
1. steel structural part hot dip galvanizing method is characterized in that the basic procedure of hot-dip galvanizing technique is:
1) prepares before the plating: steel structural part is carried out the platability identification, material mark, chemical ingredients, shape and structure etc. are checked, remove steel structural part surface paint in advance, dirt and bur etc.;
2) skimming treatment: utilize degreasing fluid that steel structural part is carried out skimming treatment, remove its surface and oil contaminant, lipid impurity;
3) cleaning and degreasing raffinate: the degreasing fluid to the steel structural part remained on surface cleans;
4) pickling: put into the hydrochloric acid soln of 20-25% to the steel structural part after the skimming treatment, remove its surperficial rusty stain and zone of oxidation, and hydrochloric acid soln contains the iron protochloride FeCl that initial value is 50-80g/L
2
5) clean the pickling raffinate: the steel structural part after the cleaning pickling, the pickle solution of removal remained on surface;
6) activation steel structural part matrix: the normal temperature dilute hydrochloric acid solution with 50-60g/L is further handled steel structural part, and precision is cleaned, activation steel structural part surface matrix, and the treatment time is 30-60 second;
7) be coated with and help the plating solvent: the steel structural part after the activation is put into helped in the plating solvent, dip-coating 1-3 minute, make the steel structural part surface evenly be coated with last layer and help the plating solvent;
8) oven dry helps moisture content in the plating solvent: with helping the steel structural part that crosses solvent to dry processing in the dip-coating, remove the moisture content of its surface attachment;
9) galvanizing: help dip-coating the steel structural part that crosses solvent to be immersed in the fused zinc-base liquid well, it is carried out galvanizing handle;
10) cooling and remove surplus zinc in the air: after from 455 ℃ ± 5 ℃ zinc-base liquid, proposing steel structural part, be positioned over and slowly cool in the air about 200 ℃, and utilize zinc-base liquid self gravitation, remove the surperficial unnecessary zinc-base liquid of steel structural part;
11) cool off in the water: put into 40 ℃ of-60 ℃ of water to about 200 ℃ steel structural part, continue after the cooling several seconds it to be left the water;
12) oven dry moisture content: after steel structural part takes out from water, still have about 100 ℃-150 ℃, self surplus temperature can be dried its surperficial moisture content automatically;
13) check: whether the quality that detects outward appearance, thickness of coating and the adherence of coating of steel structural part surface galvanizing layer meets correlation standard.
2. according to the said steel structural part hot dip galvanizing method of claim 1, it is characterized in that:
Said step 2) in the skimming treatment technology degreasing fluid by sodium hydroxide, the yellow soda ash of 20-30g/L, 8-10g/L tsp, the 4-5g/L water glass of 40-50g/L, TX-10 is formulated for the 2-4g/L tensio-active agent; Wherein the degreasing fluid temperature is controlled at 80-90 ℃, PH >=13.
3. according to the said steel structural part hot dip galvanizing method of claim 2, it is characterized in that:
Said step 2) in the skimming treatment technology degreasing fluid by sodium hydroxide, the yellow soda ash of 23g/L, 8.5g/L tsp, the 4.5g/L water glass of 43g/L, TX-10 is formulated for the 2.5g/L tensio-active agent; Wherein the degreasing fluid temperature is controlled at 83 ℃, and PH equals 13.5.
4. according to the said steel structural part hot dip galvanizing method of claim 1, it is characterized in that:
Help the plating solvent formulated by the industrial zinc chloride of the industrial ammonium chloride of 160-200g/L and 80-120g/L in the said step 7), wherein help and plate solvent temperature and be controlled at 65-75 ℃, pH value is controlled between the 4.5-6.5, and treatment solution density is controlled at 1.1-1.2g/cm
3Between, after steel structural part immersed and helps the plating solvent, it helped iron protochloride FeCl in the plating solvent
2Content can not surpass 5g/L.
5. according to the said steel structural part hot dip galvanizing method of claim 4, it is characterized in that:
Help the plating solvent formulated by the industrial zinc chloride of the industrial ammonium chloride of 180g/L and 90g/l in the said step 7), wherein help and plate solvent temperature and be controlled at 68 ℃, pH value is controlled at 6, and treatment solution density is controlled at 1.13g/cm
3, after steel structural part immersed and helps the plating solvent, it helped iron protochloride FeCl in the plating solvent
2Content can not surpass 5g/L.
6. according to the said steel structural part hot dip galvanizing method of claim 1, it is characterized in that:
Zinc-base liquid is the aluminium that in pure zinc is bathed, adds 0.008-0.018% in the said step 9), adds the nickel of 0.01-0.05%, and wherein aluminium is to add in the pure zinc bath with the mode of aluminium zinc, and the percentage composition of aluminium is 5% in the aluminium zinc;
Nickel is to add in the pure zinc bath with the mode of admiro, and the percentage composition of nickel is 1% in the admiro.
7. according to the said steel structural part hot dip galvanizing method of claim 6, it is characterized in that:
Zinc-base liquid is in pure zinc is bathed, to add 0.012% aluminium in the said step 9), adds 0.03% nickel, and wherein aluminium is to add in the pure zinc bath with the mode of aluminium zinc, and the percentage composition of aluminium is 5% in the aluminium zinc;
Nickel is to add in the pure zinc bath with the mode of admiro, and the percentage composition of nickel is 1% in the admiro.
8. according to the said steel structural part hot dip galvanizing method of claim 1, it is characterized in that:
The zinc-base liquid temp is between 455 ℃ ± 5 ℃ in the said step 9); Steel structural part is put into to soak after 1-5 minute in the zinc-base liquid and is slowly proposed; Its adjustable-speed joint is proposed and be controlled at 1-1.5 rice/minute, plating piece gross weight wherein hourly is smaller or equal to 2.5% of zinc-base liquid weight in the pot.
9. said according to Claim 8 steel structural part hot dip galvanizing method is characterized in that:
The zinc-base liquid temp is 453 ℃ in the said step 9); Steel structural part is put into to soak after 150 seconds in the zinc-base liquid and is slowly proposed; It proposes the adjustable-speed joint and is controlled at 1.2 meters/minute, and plating piece gross weight wherein hourly is smaller or equal to 2.5% of zinc-base liquid weight in the pot.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092682A (en) * | 2007-07-18 | 2007-12-26 | 南京大吉铁塔制造有限公司 | Hot dip galvanizing method for steel pieces |
-
2011
- 2011-10-27 CN CN201110331006.3A patent/CN102363875B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092682A (en) * | 2007-07-18 | 2007-12-26 | 南京大吉铁塔制造有限公司 | Hot dip galvanizing method for steel pieces |
Non-Patent Citations (3)
| Title |
|---|
| > 20080131 肖鑫,易翔,钟萍,欧玲燕 全光亮碱性锌酸盐镀锌工艺研究 第62页右栏倒数第9行到倒数第5行 1-9 第20卷, 第1期 * |
| 肖鑫,易翔,钟萍,欧玲燕: "全光亮碱性锌酸盐镀锌工艺研究", <<腐蚀科学与防护技术>>, vol. 20, no. 1, 31 January 2008 (2008-01-31) * |
| 苗立贤，焦宗保，张保湖，谢秋: "钢丝热镀锌清洁生产", 《电镀与涂饰》, vol. 28, no. 1, 31 December 2009 (2009-12-31) * |
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Address after: 101111, Beijing economic and Technological Development Zone, No. three, No. 109, Hai Lu, building 20 Applicant after: Beijing Jingjie Ruisi Technology Development Co, Ltd. Applicant after: Beijing Haitai Ruisen Environment Energy Technology Development Co., Ltd. Address before: 100176, Beijing economic and Technological Development Zone, Garden North Street, No. 57, building 15, 2 floor Applicant before: Beijing Jingjie Ruisi Technology Development Co, Ltd. Applicant before: Beijing Haitai Ruisen Environment Energy Technology Development Co., Ltd. |
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