CN102936711B - Hot dip coating Zn-Al-Ni alloy, preparation technology and hot dip coating method - Google Patents
Hot dip coating Zn-Al-Ni alloy, preparation technology and hot dip coating method Download PDFInfo
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Abstract
The invention discloses a hot dip coating Zn-Al-Ni alloy, a preparation technology and a hot dip coating method. The hot dip coating Zn-Al-Ni alloy comprises, by weight, 99.88% to 99.92% of Zn, 0.04% to 0.06% of Al and 0.04% to 0.06% of Ni. During the preparation, Zn is melted and heated to a temperature in a range of 550 DEG C to 600 DEG C, Al foil is added and stirred with ceramic rods, so that the Al foil is dissolved completely, Ni foil is added and stirred, and heat is preserved for two hours after the Ni foil is dissolved completely to enable the Ni foil to be spread evenly. According to the hot dip coating Zn-Al-Ni alloy, the preparation technology and the hot dip coating method, defects in the prior art are overcome, large improvements are provided for coating surface conditions by adding Al and Ni elements simultaneously instead of adding Al and Ni elements independently. Zinc slag can be reduced, the coating surface smoothness can be improved apparently, the coating super-thick phenomenon can be inhibited, the abrasion resistance is enhanced, the abrasion coefficient is small, and the coating corrosion resistance is improved, so that advantages of adding Al and Ni elements independently are reflected comprehensively.
Description
Technical field
The present invention relates to ferrous materials anticorrosion technique field, by the development of novel zinc-base alloy formula, gloomy, the coarse and super thick problem of coating at pot galvanize industry solution Sheng Delin steel coating surface.
Background technology
In order to improve thickness of coating, surface gloss and the physical strength etc. of iron and steel hot galvanizing piece, people can add one or more alloying elements conventionally in zinc bath.During galvanizing, in zinc is bathed, add a small amount of aluminium can obviously improve the bright property of coating, the oxidation of minimizing zinc liquid surface zinc, obtain the coating of surfacing light, so Trace Aluminum adding technique is widely used.Therefore in steel, the existence of element silicon makes steel in hot galvanizing process, occur Sheng Delin effect, can cause plating piece to occur gloomy, super thick, poor adhesion etc., and quality product is obviously declined, and has also increased zinc consumption simultaneously.Ni element adding technique has become the super thick a kind of novel technique of solution coating of recent year approval, adds Ni element can obviously suppress the reaction of iron zinc, makes the fragility phase attenuate in coating, draws the coating that bonding strength is good.
For common Sheng Delin steel, if add separately aluminium element, no doubt can increase the surface gloss of coating, but can not suppress the super thick phenomenon of Sheng Delin steel, thereby can not obtain the coating that thickness is suitable, bonding strength is good.And if add separately nickel element, zinc is bathed surface and can be produced more cadmia and make coating surface produce more particle, thereby makes Deposit appearance degradation.Along with scientific and technological progress and the deterioration of environment, people improve gradually to the requirement of hot galvanizing surface quality, not only require galvanizing layer thickness suitable, and need have good corrosion resisting property, also need the outward appearance that light is level and smooth.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, while adding Ni element and Al element separately by add Al and Ni element ratio simultaneously, coating surface situation has had very large improvement.Main manifestations, for reducing the generation of cadmia, can obviously improve the smooth finish of coating surface, and can suppress the super thick phenomenon of coating, wear resistance strengthens, frictional coefficient is less, and has improved the corrosion resistance nature of coating, makes the advantage of adding separately Al element and Ni element obtain comprehensive embodiment.
The embodiment of the present invention is achieved in that a kind of hot dip galvanizing-Al-Ni alloy, it is characterized in that, this hot dip galvanizing-Al-Ni alloying constituent proportioning is by weight percentage: Zn:99.88～99.92%Al:0.04～0.06%Ni:0.04～0.06%.
Another object of the embodiment of the present invention is to provide a kind of preparation technology of hot dip galvanizing-Al-Ni alloy, the steps include: first zinc melted and be heated to 550～600 ℃, then add Al paper tinsel and stir and make its complete uniform dissolution with ceramic rod, and then add Ni paper tinsel and stir, after it dissolves completely, be incubated two hours, make its diffusion evenly.
Another object of the embodiment of the present invention is to provide a kind of method of utilizing Zn-Al-Ni alloy prepared by above-mentioned preparation technology to carry out hot dip process, it is characterized in that, the method comprises the following steps:
Adopt Q235 steel, cut into the sample that is of a size of 30mm * 30mm * 3mm, through polishing, remove after surface scale, obtain surfacing, smooth sample;
First zinc melted and be heated to 550～600 ℃, then add Al paper tinsel and stir and make its complete uniform dissolution with ceramic rod, and then add Ni paper tinsel and stir, after it dissolves completely, being incubated two hours, making its diffusion evenly;
Before sample hot dip process, configuration desired concn alloy plating bath composition, the zinc alloy plating bath of preparation be Zn-0.05%Al-xNi (x=0.02,0.05,0.09,0.12wt%);
Carry out galvanizing.
Further, concrete technology flow process is: first with iron wire, in drill hole, the sample grinding is fixed, to hang; Then sample is put into massfraction and be 15% hot sodium hydroxide solution and carry out skimming treatment, wherein the temperature of sodium hydroxide solution is 70～80 ℃, takes out to put into pure water and clean after five minutes; The sample after cleaning is put into massfraction again and be processings of derusting of 15% hydrochloric acid, the temperature of this hydrochloric acid is room temperature, and after two minutes, taking-up is put into pure water and cleaned; Then the sample after cleaning being put into 120g/L zinc chloride and 120g/L ammonium chloride mixing solutions carries out flux and helps plating, wherein helping plating temperature is 60 ℃～70 ℃, after five minutes, take out and put into loft drier and carry out drying and processing, loft drier temperature is 120 ℃, and be 5～7 minutes time of drying; After sample drying, sample is taken out and carries out galvanizing, immersion plating temperature is 450 ℃～460 ℃, and the immersion plating time is 1min, puts into pure water cooling after sample immersion plating.
The present invention utilizes the means such as metaloscope, salt mist experiment case, microhardness tester, frictional testing machines to measure microstructure thickness, erosion resistance, hardness and the wear resistance etc. of the Zn-Al-Ni alloy layer of heterogeneity proportioning, by Comprehensive Assessment, the performance that draws hot dip galvanizing-0.05%Al-0.05%Ni alloy layer is best, is embodied in: smooth surface, coating homogeneous microstructure, thickness of coating is suitable, erosion resistance is best, hardness is maximum, frictional coefficient is minimum.Be applicable to suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the impact of Ni content on Zn-0.05%Al-xNi (x=0.02～0.12%) coating surface morphology: (a) 0.02%Ni, and (b) 0.05%Ni, (c) 0.09%Ni, (d) O.12%Ni.
Fig. 2 is the impact of Ni content on Zn-0.05%Al-xNi (x=0.02～0.12%) thickness of coating.
Fig. 3 is Zn-0.05%Al-xNi (x=0.02～0.12%) coating microsturcture: (a) 0.02%Ni, (b) 0.05%Ni, (c) 0.09%Ni, (d) 0.12%Ni.
Fig. 4 is the relation curve of asking in Zn-0.05%Al-xNi (x=0.02～O.12%) coating surface frictional coefficient-time: (a) 0.02%Ni, (b) 0.05%Ni, (c) 0.09%Ni, (d) 0.12%Ni.
Fig. 5 is the impact of Ni content on Zn-0.05%Al-xNi (x=0.02～0.12%) coating surface frictional coefficient.
Fig. 6 is the surface hardness curve of Zn-0.05%Al-xNi (x=0.02～0.12%) coating.
Fig. 7 is the impact of Ni content on Zn-0.05%Al-xNi (x=0.02～0.12%) coating corrosion resistance nature.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing 1 to 7 and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of hot dip galvanizing-Al-Ni alloy, and composition proportion is by weight percentage: Zn:99.88～99.92% Al:0.04～0.06%Ni:0.04～0.06%.
The embodiment of the present invention also provides a kind of preparation technology of hot dip galvanizing-Al-Ni alloy, the steps include:
First zinc melted and be heated to 550～600 ℃, then add Al paper tinsel and stir and make its complete uniform dissolution with ceramic rod, and then add Ni paper tinsel and stir, after it dissolves completely, being incubated two hours, making its diffusion evenly.
Another object of the embodiment of the present invention is to provide a kind of method of utilizing Zn-Al-Ni alloy prepared by above-mentioned preparation technology to carry out hot dip process, and concrete steps are as follows:
1) adopt Q235 steel, cut into the sample that is of a size of 30mm * 30mm * 3mm, through polishing,
Remove after surface scale, obtain surfacing, smooth sample.
2) first zinc melted and be heated to 550～600 ℃, then add Al paper tinsel and stir and make its complete uniform dissolution with ceramic rod, and then add Ni paper tinsel and stir, after it dissolves completely, being incubated two hours, making its diffusion evenly.
3), before sample hot dip process, configure according to the method described above the alloy plating bath composition of desired concn.The zinc alloy plating bath of this experiment preparation be Zn-0.05%Al-xNi (x=0.02,0.05,0.09, O.12wt%).
4) hot-dip galvanizing technique flow process is: first with iron wire, in drill hole, the sample grinding is fixed, to hang; Then sample is put into massfraction and be 15% hot sodium hydroxide solution and carry out skimming treatment, wherein the temperature of sodium hydroxide solution is 70～80 ℃, takes out to put into pure water and clean after five minutes; The sample after cleaning is put into massfraction again and be processings of derusting of 15% hydrochloric acid, the temperature of this hydrochloric acid is room temperature, and after two minutes, taking-up is put into pure water and cleaned; Then the sample after cleaning being put into 120g/L zinc chloride and 120g/L ammonium chloride mixing solutions carries out flux and helps plating, wherein helping plating temperature is 60 ℃～70 ℃, after five minutes, take out and put into loft drier and carry out drying and processing, loft drier temperature is 120 ℃, and be 5～7 minutes time of drying; After sample drying, sample is taken out and carries out galvanizing, immersion plating temperature is 450 ℃～460 ℃, and the immersion plating time is 1min, puts into pure water cooling after sample immersion plating.
By data in following table, can find out positively effect and the advantage place of the embodiment of the present invention.
The one-tenth-value thickness 1/10 of table 1 different-alloy composition coating
Wear-resisting time and the frictional coefficient of table 2 different-alloy coating
The surface hardness value of table 3 different-alloy composition coating
The erosion rate result of table 4 different-alloy coating
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. hot dip galvanizing-Al-Ni alloy, is characterized in that, this hot dip galvanizing-Al-Ni alloying constituent proportioning is by weight percentage: Zn:99.88～99.92% Al:0.04～0.06% Ni:0.04～0.06%.
2. the preparation technology of hot dip galvanizing-Al-Ni alloy, the steps include: first zinc melted and be heated to 550～600 ℃, then add Al paper tinsel and stir and make its complete uniform dissolution with ceramic rod, and then add Ni paper tinsel and stir, after it dissolves completely, be incubated two hours, make its diffusion evenly;
Zn-Al-Ni alloy prepared by described preparation technology carries out the method for hot dip process, it is characterized in that, the method comprises the following steps:
Adopt Q235 steel, cut into the sample that is of a size of 30mm * 30mm * 3mm, through boring, polishing, remove after surface scale, obtain surfacing, smooth sample;
First zinc melted and be heated to 550～600 ℃, then add Al paper tinsel and stir and make its complete uniform dissolution with ceramic rod, and then add Ni paper tinsel and stir, after it dissolves completely, being incubated two hours, making its diffusion evenly;
Before sample hot dip process, configuration desired concn alloy plating bath composition, the zinc alloy plating bath of preparation be Zn-0.05%Al-xNi (x=0.02,0.05,0.09,0.12wt%);
Carry out galvanizing;
The method concrete technology flow process is: first with iron wire, in drill hole, the sample grinding is fixed, to hang; Then sample is put into massfraction and be 15% hot sodium hydroxide solution and carry out skimming treatment, wherein the temperature of sodium hydroxide solution is 70～80 ℃, takes out to put into pure water and clean after five minutes; The sample after cleaning is put into massfraction again and be processings of derusting of 15% hydrochloric acid, the temperature of this hydrochloric acid is room temperature, and after two minutes, taking-up is put into pure water and cleaned; Then the sample after cleaning being put into 120g/L zinc chloride and 120g/L ammonium chloride mixing solutions carries out flux and helps plating, wherein helping plating temperature is 60 ℃～70 ℃, after five minutes, take out and put into loft drier and carry out drying and processing, loft drier temperature is 120 ℃, and be 5～7 minutes time of drying; After sample drying, sample is taken out and carries out galvanizing, immersion plating temperature is 450 ℃～460 ℃, and the immersion plating time is 1min, puts into pure water cooling after sample immersion plating.
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| CN104099550A (en) * | 2014-06-27 | 2014-10-15 | 陕西理工学院 | Preparation method of hot-dipped Zn-Al-Mn alloy and hot dipping process thereof |
| CN104480419A (en) * | 2014-08-19 | 2015-04-01 | 陕西理工学院 | Plating method of low-aluminum hot-dipped Zn-Al-Mg-Si alloy coating |
| CN110714178A (en) * | 2019-11-03 | 2020-01-21 | 江苏荣辉电力设备制造有限公司 | Hot galvanizing process for electric iron tower component |
| CN111004971B (en) * | 2019-12-16 | 2021-05-25 | 首钢集团有限公司 | Hot-dip plated steel and preparation method thereof |
| CN113151766B (en) * | 2021-03-16 | 2022-03-04 | 重庆广仁铁塔制造有限公司 | Low-alloy high-strength iron tower component sub-polished surface treatment method and sub-polished iron tower |
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| CN101948991A (en) * | 2010-09-21 | 2011-01-19 | 浙江华达钢业有限公司 | Corrosion-resistant hot galvanized steel plate and preparation method thereof |
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| CN101135017A (en) * | 2007-07-09 | 2008-03-05 | 株洲冶炼集团股份有限公司 | Hot-dip galvanizing alumino-nickel for steel component hot-dip galvanizing and ingot shape and method thereof |
| CN102477522B (en) * | 2010-11-29 | 2014-04-30 | 宝山钢铁股份有限公司 | Hot-dip corrosion resistant galvanized coating |
| CN102286716B (en) * | 2011-08-26 | 2014-11-26 | 无锡市广润金属制品有限公司 | Continuous hot dip galvanizing process for strip steel |
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