CN104195490B - Hot-dip galvanizing aftertreatment process of steel pipe - Google Patents
Hot-dip galvanizing aftertreatment process of steel pipe Download PDFInfo
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- CN104195490B CN104195490B CN201410257743.7A CN201410257743A CN104195490B CN 104195490 B CN104195490 B CN 104195490B CN 201410257743 A CN201410257743 A CN 201410257743A CN 104195490 B CN104195490 B CN 104195490B
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Abstract
The invention relates to a hot-dip galvanizing aftertreatment process of a steel pipe. The hot-dip galvanizing aftertreatment process of the steel pipe comprises the steps of zinc draining, cooling, inner blowing and passivating treatment for the steel pipe, which are conducted successively after hot-dip galvanizing, wherein the passivating treatment is to spray passivating liquid on the inner and outer surfaces of the steel pipe and to bake for 2.5-5 minutes at a temperature of 100-120 DEG C; and the passivating liquid consists of titanate, phosphate, organosilicone modified epoxy resin, triethanolamine, organic acid and water. The aftertreatment process can be adopted to form a composite membrane of phosphate, titanium salt and organosilicone modified epoxy resin on the surface of a hot-dip galvanized layer; and the composite membrane has excellent corrosion resistance.
Description
Technical field
The present invention relates to the technical field of galvanizing by dipping, it is more particularly related to after a kind of steel pipe hot-dip galvanizing
Handling process.
Background technology
The corrosion of ferrous materials is not occurring all the time.According to statistics, 10% steel are there are about every year because corroding and nothing
Method is reclaimed.To prevent corrosion, the massive losses for reducing the corrosion of invar iron material and causing must just take various anti-corrosions
Method, to steel surface, it is exactly a kind of processing method for generally adopting that such as steel tube surface carries out zinc-plated process the in hot Tianjin.Hot-dip
Zinc steel pipe has stronger corrosion resistance and intensity, can be widely applied for the conveyance conduit of coal gas, heating installation and water.
Because the corrosion resistance of coating steel pipe is in some special industries, such as water or gas piping can't reach design and use
Require, and coating steel pipe can the time be long during transport and storage, and the surface of galvanized pipe is susceptible to micro cell and forms hydrogen
Zinc oxide, so as to white rust spot occurs.Therefore, in order to further improve the antiseptic property of coating steel pipe, it usually needs to plating
Zinc steel pipe carries out surface passivating treatment.Traditional Passivation Treatment is mainly the sexavalence chromium passivating based on chromate.Chromate is blunt
Change and have that passivating film corrosion resistance is good, technology maturation is with low cost, using simple to operate, outward appearance is beautiful and has self-reparing capability etc.
Advantage, and become the conventional passivation processing method of zinc coat.But it is chromyl blunt because Cr VI toxicity is high and has carcinogenicity
The discharge for changing waste liquid will be controlled by increasingly stricter.Therefore, in recent years, in the world to the exploitation and production of chromium-free passivation liquid
It is more and more popular, in existing chromium-free passivation liquid, mainly there are zirconium liquid, titanium salt passivating solution, phosphate vacation transformant passivating solution
Deng, but they are difficult to be fully achieved application request in terms of decay resistance.
The content of the invention
In order to solve above-mentioned technical problem of the prior art, it is an object of the invention to provide a kind of steel pipe hot-dip galvanizing
Aftertreatment technology.
In order to solve to invent described technical problem and realize goal of the invention, technical scheme below is present invention employs：
Steel pipe hot-dip galvanizing aftertreatment technology of the present invention, it includes steel pipe is carried out to carry out successively after galvanizing by dipping
Drip zinc, cooling, interior blow and Passivation Treatment step；It is characterized in that：Described drip zinc refers to the electro-galvanized steel during zinc is bathed
Pipe takes out rear-inclined and places, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then places 3～5 minutes so that described
Hot-dip zinc pipe inside and outside be cooled to 120～200 DEG C so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then
Using steam carry out in blow, interior blow pressure power is 0.5～0.8MPa, and the temperature of steam is 120～150 DEG C, and the time is 10～30 seconds,
Zinc powder unnecessary in hot-dip zinc pipe is blown in zinc bucket；Described Passivation Treatment is referred to using containing inorganic inhibitor and organic
The passivating solution of film forming agent is processed.
Wherein, described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and 100
2.5～5min is toasted under conditions of～120 DEG C.
Wherein, the passivating solution contain titanate, phosphate, modifying epoxy resin by organosilicon, triethanolamine, organic acid and
Water.
Wherein, the passivating solution is by titanate, phosphate, modifying epoxy resin by organosilicon, triethanolamine, organic acid and water
Composition.
Wherein, described modifying epoxy resin by organosilicon is prepared by following methods：By epoxy resin E44 and metatitanic acid fourth
Ester catalyst is put in the there-necked flask equipped with agitator, reflux condensing tube and dropping funel, after being heated to 80～120 DEG C
Start stirring, wherein the epoxy resin E44 is 10: 0.1～0.2 with the mass ratio of butyl titanate catalyst；Then Z6018 is pressed
: E44 mass ratioes are the xylene solution that 1: 2 ratio is slowly added dropwise Z6018 organosilicons, and little in 200 DEG C of reactions 4.5～5.5
When, it is then refluxed for condensing the micromolecular compound alcohol and water for constantly separating evolution reaction generation, obtaining translucent sticky shape has
Machine silicon modified epoxy resin.
Compared with immediate prior art, steel pipe hot-dip galvanizing aftertreatment technology of the present invention has following beneficial
Effect：
The hot-dip galvanized steel pipe of zirconates, titanium salt or phosphate passivation is easy in actual use used in prior art
Form surface " rotten zinc " phenomenon, that is, " white powder " phenomenon generally said；Once such case occur will greatly reduce zinc coat
Antiseptic property, the main cause for case above occur is the acid such as water and carbon dioxide in air, in alkaline environment can exist
Zinc pipe surface formed electrolyte, make zinc pipe surface zinc occurs " micro cell " react form Zn (OH)2, zine corrosion is accelerated, sternly
Shorten the service life of zinc pipe again.And passivating solution of the present invention is adopted, it can form the composite membrane of densification, can be notable
Improve the corrosion resistance of passivation layer.
Specific embodiment
Steel pipe hot-dip galvanizing aftertreatment technology of the present invention is further explained below with reference to specific embodiment
State, have more complete, accurate and deep reason to inventive concept of the invention, technical scheme to help those skilled in the art
Solution；It is to be understood that description in a particular embodiment is all exemplary, and it is not intended to the scope of the present invention
Limit, the interest field of the present invention is defined by the claim for limiting.
Steel pipe hot-dip galvanizing aftertreatment technology of the present invention, it includes steel pipe is carried out to carry out successively after galvanizing by dipping
Drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out rear-inclined
Place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described hot-dip zinc pipe
It is inside and outside to be cooled to 120～200 DEG C so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam
Inside blow, interior blow pressure power is 0.5～0.8MPa, and the temperature of steam is 120～150 DEG C, and the time is 10～30 seconds, by hot-dip zinc pipe
Interior unnecessary zinc powder is blown in zinc bucket；Described Passivation Treatment is referred to and for passivating solution to be ejected into the steel pipe internal-surface and outer surface
On, and 2.5～5min is toasted under conditions of 100～120 DEG C.The passivating solution by 1.8～2.5wt% titanates, 3.2～
The phosphate of 5.8wt%, the modifying epoxy resin by organosilicon of 12.0～15.0wt%, the triethanolamine of 0.3～0.5wt%, 2.3
The organic acid of～2.8wt% and water are constituted.It is concrete next and in the present invention the organic acid is selected from the organic acid containing hydroxyl
Say that it can be one or more in citric acid, tartaric acid, malic acid, salicylic acid or lactic acid.The phosphate may be selected from phosphorus
One or more in sour sodium, dibastic sodium phosphate, sodium dihydrogen phosphate or trbasic zinc phosphate.It is organic described in the middle embodiment of the present invention
Silicon modified epoxy resin is prepared by following methods：By epoxy resin E44 and butyl titanate catalyst be put into equipped with agitator,
In the there-necked flask of reflux condensing tube and dropping funel, stirring is started after being heated to 80～120 DEG C, wherein the asphalt mixtures modified by epoxy resin
Fat E44 is 10: 0.12 with the mass ratio of butyl titanate catalyst；Then slowly drip for 1: 2 ratio in Z6018: E44 mass ratio
Plus the xylene solution of Z6018 organosilicons, and react 4.5～5.0 hours at 200 DEG C, it is then refluxed for condensing constantly separation precipitation
The micromolecular compound alcohol and water that reaction is produced, obtains translucent sticky shape modifying epoxy resin by organosilicon.In the present invention
Described galvanizing by dipping, described zinc bath can be pure zinc, or kirsite, such as allumen.As an example property ground, this
Galvanizing by dipping described in inventive embodiment and comparative example be Al, 0.25wt% containing 5.8wt% Ti,
Plating is obtained in the zinc alloy baths of the Ni of Si, 1.32wt% of 0.75wt% and the zinc of surplus.And adopt of the present invention
Passivating solution, it can form the composite membrane of densification, and it can significantly improve the corrosion resistance of galvanizing by dipping passivation layer.
Embodiment 1
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 1.8wt% sodium titanates, the sodium phosphate of 3.2wt%, 15.0wt% organosilicon
Modified epoxy, the triethanolamine of 0.5wt%, the citric acid of 2.5wt% and water composition.
Embodiment 2
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution is had by 1.8wt% sodium titanates, the sodium dihydrogen phosphate of 3.2wt%, 15.0wt%
Machine silicon modified epoxy resin, the triethanolamine of 0.5wt%, the malic acid of 2.5wt% and water composition.
Embodiment 3
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 1.8wt% sodium titanates, the dibastic sodium phosphate of 3.2wt%, 15.0wt% it is organic
Silicon modified epoxy resin, the triethanolamine of 0.5wt%, the tartaric acid of 2.5wt% and water composition.
Embodiment 4
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 2.5wt% sodium titanates, the sodium phosphate of 5.8wt%, 12.0wt% organosilicon
Modified epoxy, the triethanolamine of 0.5wt%, the tartaric acid of 2.5wt% and water composition.
Embodiment 5
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 13.5wt% organosilicon
Modified epoxy, the triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
Embodiment 6
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 100 DEG C
Under conditions of toast 5min.The passivating solution is changed by the organosilicon of 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 13.5wt%
Property epoxy resin, the triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
Embodiment 7
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 100 DEG C
Under conditions of toast 5min.The passivating solution is changed by the organosilicon of 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 13.5wt%
Property epoxy resin, the triethanolamine of 0.5wt%, the salicylic acid of 2.5wt% and water composition.
Embodiment 8
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 100 DEG C
Under conditions of toast 5min.The passivating solution is changed by the organosilicon of 2.1wt% sodium titanates, the sodium phosphate of 5.0wt%, 13.8wt%
Property epoxy resin, the triethanolamine of 0.4wt%, the salicylic acid of 2.5wt% and water composition.
Embodiment 9
Steel pipe hot-dip galvanizing aftertreatment technology described in the present embodiment, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 100 DEG C
Under conditions of toast 5min.The passivating solution is changed by the organosilicon of 2.3wt% sodium titanates, the sodium phosphate of 5.1wt%, 13.2wt%
Property epoxy resin, the triethanolamine of 0.4wt%, the tartaric acid of 2.5wt% and water composition.
Comparative example 1
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 100 DEG C
Under conditions of toast 5min.The passivating solution by the sodium phosphate of 3.8wt%, the modifying epoxy resin by organosilicon of 13.5wt%,
The triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
Comparative example 2
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 2.0wt% sodium titanates, the modifying epoxy resin by organosilicon of 13.5wt%,
The triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
Comparative example 3
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 100 DEG C
Under conditions of toast 5min.The passivating solution is changed by the organosilicon of 2.0wt% sodium molybdates, the sodium phosphate of 3.8wt%, 13.5wt%
Property epoxy resin, the triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
Comparative example 4
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 2.0wt% sodium zirconates, the sodium phosphate of 3.8wt%, 13.5wt% organosilicon
Modified epoxy, the triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
Comparative example 5
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 100 DEG C
Under conditions of toast 5min.The passivating solution by 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 13.5wt% epoxy resin
The triethanolamine of E44,0.5wt%, the lactic acid of 2.5wt% and water composition.
Comparative example 6
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 13.5wt% organosilicon
The triethanolamine of Z6018,0.5wt%, the lactic acid of 2.5wt% and water composition.
Comparative example 7
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 0.5wt% three ethanol
Amine, the lactic acid of 2.5wt% and water composition.
Comparative example 8
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution by 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 13.5wt% propylene
Acid -2- hydroxy methacrylates, the triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
Comparative example 9
Steel pipe hot-dip galvanizing aftertreatment technology described in this comparative example, it includes steel pipe is carried out to enter successively after galvanizing by dipping
Capable drip zinc, cooling, interior blow and Passivation Treatment step；Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
150 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then carried out using steam interior
Blow, interior blow pressure power is 0.6MPa, and the temperature of steam is 150 DEG C, and the time is 10～30 seconds, by zinc powder unnecessary in hot-dip zinc pipe
It is blown in zinc bucket；Described Passivation Treatment refers to and passivating solution is ejected on the steel pipe internal-surface and outer surface, and at 120 DEG C
Under conditions of toast 2.5min.The passivating solution is newborn by the silicon third of 2.0wt% sodium titanates, the sodium phosphate of 3.8wt%, 13.5wt%
Liquid, the triethanolamine of 0.5wt%, the lactic acid of 2.5wt% and water composition.
The resistance to corrosion of the Several Thiourea Derivatives on Zinc Plate Surface through embodiment and comparative example is evaluated by neutral salt spray corrosion test.
Wherein, neutral salt spray corrosion test refers to reference to GB/T 10125-1997 that using continuous spray test 120h observation occurs " white
The area of rust ", with cross-hatching percentage shared by " white rust " area is calculated, and carries out grade evaluation with reference to GB/T 6461-2002.
The neutral salt soak test referred to 30 days in the sodium chloride solution that the sample of mistake processed by the invention is immersed respectively 5wt%,
" white rust " area percentage after observation certain hour.
The Evaluation of Corrosion Resistance standard results of the embodiment of table 1 and comparative example
For the ordinary skill in the art, specific embodiment is simply exemplarily described to the present invention,
Obviously the present invention is implemented and is not subject to the restrictions described above, as long as employ method of the present invention design entering with technical scheme
The improvement of capable various unsubstantialities, or it is not improved by the present invention design and technical scheme directly apply to other occasions
, within protection scope of the present invention.
Claims (5)
1. a kind of steel pipe hot-dip galvanizing aftertreatment technology, it is drip zinc that it includes carrying out being carried out successively after galvanizing by dipping to steel pipe, cold
But it is, interior to blow and Passivation Treatment step；It is characterized in that：Described drip zinc refers to that the hot-dip galvanized steel pipe during zinc is bathed takes out hypsokinesis
Tiltedly place, so that the zinc liquid of the inside and outside flowing of steel pipe is dripped in zinc bath, then place 3～5 minutes so that described galvanizing by dipping
120～200 DEG C are cooled to inside and outside pipe so that generating zinc-iron alloy layer in described steel pipe surfaces externally and internally；Then entered using steam
Blow in row, interior blow pressure power is 0.5～0.8MPa, and the temperature of steam is 120～150 DEG C, and the time is 10～30 seconds, by galvanizing by dipping
Unnecessary zinc powder is blown in zinc bucket in pipe；Described Passivation Treatment referred to using passivating solution process, the passivating solution by 1.8～
The titanate of 2.5wt%, the phosphate of 3.2～5.8wt%, the modifying epoxy resin by organosilicon of 12.0～15.0wt%, 0.3～
The triethanolamine of 0.5wt%, the organic acid of 2.3～2.8wt% and water composition；And the modifying epoxy resin by organosilicon by with
Lower section method is prepared：Epoxy resin E44 and butyl titanate catalyst are put into equipped with the leakage of agitator, reflux condensing tube and dropping liquid
In the there-necked flask of bucket, stirring is started after being heated to 80～120 DEG C, wherein the epoxy resin E44 is urged with butyl titanate
The mass ratio of agent is 10: 0.1～0.2；Then Z6018 organosilicons are slowly added dropwise for 1: 2 ratio in Z6018: E44 mass ratio
Xylene solution, and react 4.5～5.5 hours at 200 DEG C, be then refluxed for condensing and constantly separate little point that evolution reaction is produced
Sub- compound alcohol and water, obtains translucent sticky shape modifying epoxy resin by organosilicon.
2. steel pipe hot-dip galvanizing aftertreatment technology according to claim 1, it is characterised in that：Described Passivation Treatment is referred to
Passivating solution is ejected on the steel pipe internal-surface and outer surface, and 2.5～5min is toasted under conditions of 100～120 DEG C.
3. steel pipe hot-dip galvanizing aftertreatment technology according to claim 1, it is characterised in that：The phosphate is selected from phosphoric acid
One or more in sodium, dibastic sodium phosphate, sodium dihydrogen phosphate or trbasic zinc phosphate.
4. steel pipe hot-dip galvanizing aftertreatment technology according to claim 1, it is characterised in that：The organic acid is selected from and contains
The organic acid of hydroxyl.
5. steel pipe hot-dip galvanizing aftertreatment technology according to claim 4, it is characterised in that：The organic acid is selected from lemon
One or more in acid, tartaric acid, malic acid, salicylic acid or lactic acid.
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| CN105177485B (en) * | 2015-09-24 | 2017-06-06 | 河北工业大学 | A kind of galvanizing equipment for after-treatment |
| CN106591757B (en) * | 2017-02-21 | 2019-02-22 | 丹阳市腾黄钢管镀锌有限责任公司 | A kind of steel pipe hot-dip galvanizing automatic production line |
| CN107287542A (en) * | 2017-05-18 | 2017-10-24 | 当涂县宏宇金属炉料有限责任公司 | A kind of handling process for strengthening hot-dip galvanized steel sheet Corrosion Protection |
| CN107513681B (en) * | 2017-08-18 | 2019-12-20 | 桐乡市铁盛线路器材有限公司 | Hot-dip galvanizing process |
| CN108914056A (en) * | 2018-07-27 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of mask plate and preparation method thereof |
| CN114807812B (en) * | 2022-04-24 | 2023-06-30 | 上海聚丰热镀锌有限公司 | Hot dip galvanizing process for metal plating piece |
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