CN104561876A - Hot galvanizing technical method - Google Patents
Hot galvanizing technical method Download PDFInfo
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- CN104561876A CN104561876A CN201410850369.1A CN201410850369A CN104561876A CN 104561876 A CN104561876 A CN 104561876A CN 201410850369 A CN201410850369 A CN 201410850369A CN 104561876 A CN104561876 A CN 104561876A
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Abstract
The invention discloses a hot galvanizing technical method. The hot galvanizing technical method comprises the following steps: 1, before-plating examination; 2, component suspending; 3, water washing, 4, acid derusting; 5, water washing; 6, surface cleanliness examination; 7, plating assisting; 8, hot galvanizing; 9, water-cooling; 10, zinc layer thickness examination; 11, passivating; 12, component unloading; 13, grinding, repairing and final examination. The hot galvanizing technical process provided by the invention has the advantages of being low in cost, lasting, durable, high in efficiency and the like.
Description
Technical field
The present invention relates to a kind of hot dip galvanizing process method.
Background technology
Since within 1836, France is applied to industry pot galvanize, the history of existing 107 more than ten years so far.In the last thirty years, along with the develop rapidly of cold rolled strip, pot galvanize industry is able to extensive development.Galvanizing and galvanizing are also in pot galvanize: be a kind of effective anti-corrosion of metal mode, be mainly used on the metal construction facility of every profession and trade.Be by rust cleaning after steel part immerse about 500 DEG C thawings zinc liquid in, make steel beam column surface attachment zinc layers, thus play rot-resistant object.
Zinc gray cadmia not only has influence on zinc-impregnating layer quality, causes coating coarse, produces list edge, and pot galvanize cost is raised greatly.Zinc pot size has impact to zinc gray generation, in zinc bath heat-processed zinc liquid level and air contact surfaces amass larger zinc liquid oxidation and zinc gray generation larger.Zinc bath temperature also has impact to zinc gray generation, and temperature is too low, zinc liquid poor fluidity, and coating is thick and uneven, easily produces sagging, and visual appearance is poor; Temperature is too high, zinc liquid good fluidity, and zinc liquid easily departs from workpiece, and workpiece and zinc pot iron loss are seriously, produce a large amount of cadmia, affect zinc-impregnating layer quality and easily cause aberration, and zinc consumption is high.
It is high to there is power consumption in traditional hot dip galvanizing process, the equal Shortcomings in aspect such as the thickness evenness of zinc coating is poor, non-corrosibility, surface hardness (wear resisting property).
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of temperature zinc technology method is provided, have that cost is low, durable, efficiency advantages of higher.
The present invention solves its technical problem and realizes by the following technical solutions:
A kind of hot dip galvanizing process method, is characterized in that: comprise the following steps:
(1) check before plating:
According to workpiece size, the different classify and pile up of shape; And workpiece is checked;
(2) suspension member
According to the size of workpiece, length, shape and binding method, differentiate to select special hanger or suspender belt to carry out suspension member;
(3) wash
With clear water, workpiece surface oil stain is cleaned up;
(4) acidic derusting
Adopt the rusty stain of hydrochloric acid removing workpiece surface, pickling time 30-90 minute;
(5) wash
With clear water, workpiece cleaning is clean;
(6) surface cleanliness inspection
By pH test paper test piece, ensure that pH value is in the scope of 6-8;
After pH value is qualified, minute inspection is carried out to workpiece surface, require to accomplish workpiece surface smooth pieces;
(7) plating is helped
Workpiece all immerses in the plating assistant agent containing zinc chloride and ammonium chloride, until workpiece does not emit bubble in plating assistant agent, hangs out workpiece and evacuation plating assistant agent;
(8) pot galvanize
Workpiece before zinc-plated, should determine temperature and the galvanizing time of zinc liquid depending on the characteristic of workpiece (as material, thickness etc.);
The workpiece of cleaning is immersed in zinc bath, make workpiece and fused zinc react the epithelium of generation one alloying;
(9) water-cooled
After workpiece hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 50-80 DEG C;
(10) zinc coating thickness inspection
Application thickness tester carries out zinc coating thickness inspection to workpiece;
(11) passivation
To needing the workpiece of passivation to carry out passivation processing, the workpiece after water-cooled, hanging in deactivation slot carry out Passivation Treatment with driving, passivating solution temperature is normal temperature, and passivation time is 20-60s;
(12) inloading part
After thickness of workpiece is qualified, unloads suspender and carry out next step operation;
(13) grind, rebuild and final inspection
Workpiece surface is polished, rebuilds, ensure the smooth of workpiece surface surfacing; Then check comprehensively.
Described step (8) helps in plated journey, and the time of workpiece leaching plating assistant agent should control at 1-3min.
Containing zinc chloride and ammonium chloride in described step (8) plating assistant agent, zinc chloride and ammonium chloride are respectively and soak 0.5 ‰ and 1 ‰ of workpiece weight, and ratio is 1:2.
The zinc pot of described step (9) pot galvanize has following three kinds of specifications:
Article 1: long 15 meters, wide 2 meters, dark 2.5 meters;
Article 2: long 15 meters, wide 3 meters, dark 3.2 meters;
Article 3: long 9 meters, wide 1.6 meters, dark 2.3 meters;
Above galvanization production line can meet the requirement of all size type galvanized workpiece
Described step (9) workpiece before zinc-plated, should look temperature and the galvanizing time of the characteristic determination zinc liquid of workpiece; Thickness of workpiece < 3mm, zinc liquid temperature is 440 DEG C, galvanizing time 1-2min; 3mm≤thickness of workpiece < 6, zinc liquid temperature is 440-445 DEG C, galvanizing time 2-5min; Thickness of workpiece >=6mm, zinc liquid temperature is 445-450 DEG C, galvanizing time 5-8min.
A kind of hot dip galvanizing process method that the present invention improves, has that cost is low, durable, efficiency advantages of higher.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of hot dip galvanizing process method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail.
Refer to Fig. 1, Fig. 1 is a kind of hot dip galvanizing process method of the present invention, and its processing step is as follows:
(1) check before plating
According to workpiece size, the different classify and pile up of shape;
Check whether workpiece has cracking and defect situation;
Workpiece will be worn and hang position or position, hole, has hollow workpiece to tubing etc., requires venting hole or stream zinc hole;
The impurity welding slag of workpiece surface will be cleaned out;
(2) suspension member
According to the size of workpiece, length, shape and binding method, differentiate to select special hanger or suspender belt to carry out suspension member;
(3) wash
Workpiece is hung in washing bath, and pull 3-4 time up and down, from washing bath out after workpiece, first rest on above washing bath, rinse with the surfaces externally and internally of water blast gun to workpiece of 380V commercial power, 350-500 kilogram again, during water blast gun cleaning, the even each interior outside and the corner portion that all spray to workpiece should be guaranteed, accomplish thoroughly to clean up, side is qualified;
(4) acid pickling and rust removing
Workpiece hangs in the pickling of sour pond after cleaning, and pickling time decides according to the corrosion degree of workpiece material and concentration of hydrochloric acid, and general control is between 30-90 minute; Solution in acid pond, soak that about 1200 tons of workpiece must carry out clearing, at the bottom of Ex-all pond in anvil cinder, then add new hydrochloric acid, so circulate;
For preventing workpiece pickling uneven, in sour Xian's process, tackling workpiece stir, or workpiece crane is sling in the lifting of hydrochloric acid pond for several times;
Workpiece through overpickling is sling with the angle of 15 degree to 45 degree, allows acid solution fully flow out, and will suspend several minutes in midair before cleaning on sour pond, allows sour water drip in sour pond as far as possible;
As clean in still having the non-pickling of a little rusty stain after workpiece pickling, then must hang out with after sharpening machine polishing again pickling once, in order to avoid there is plating leakage;
(5) wash
Workpiece is hung in washing bath, and pull 3-4 time up and down, from washing bath out after workpiece, first rest on above washing bath, rinse with the surfaces externally and internally of water blast gun to workpiece of 380V commercial power, 350-500 kilogram again, during water blast gun cleaning, the even each interior outside and the corner portion that all spray to workpiece should be guaranteed, accomplish thoroughly to clean up, side is qualified;
Further illustrate: the water in washing pool, crossing water about 500 tons of workpiece needs to change, and the water changed out can flow in filter and carry out alkaline purification, and filtration treatment Posterior circle up to standard is used again; This method remains in workpiece surface (water blast gun cleans produced water to workpiece, flows to equally in filter and carries out above process) for anti-sealing peracid;
(6) surface cleanliness inspection
Workpiece is by after alkali cleaning and pickling, salt can be produced at workpiece surface, therefore workpiece is after flushing completes, on workpiece, potential of hydrogen test is carried out with pH test paper, test result pH value, in the scope of 6-8, belongs to qualified, as exceeded this scope, again rinse with water blast gun, till pH value is qualified;
After pH value is qualified, minute inspection is carried out to workpiece surface, require to accomplish workpiece surface smooth pieces, next step operation of being allowed for access;
(7) plating is helped
Workpiece must all immerse in solvent, and workpiece is inside and outside immersion plating workpiece, and should ensure that every part workpiece can fill solvent, inspecting standard is that workpiece does not emit bubble in a solvent;
The time of workpiece leaching solvent should control at 1-3min;
After workpiece leaching solvent, should by the evacuation of workpiece internal solvent, subsequent processing of being allowed for access;
The interpolation of plating assistant agent: containing zinc chloride and ammonium chloride in plating assistant agent, soaks workpiece about 3000 tons, and must add 1.5 tons of zinc chloride and 3 tons of ammonium chlorides, part by weight is 1:2;
(8) pot galvanize
Workpiece is before zinc-plated, and should determine temperature and the galvanizing time of zinc liquid depending on the characteristic of workpiece (as material, thickness etc.), zinc coating thickness parameter sees the following form:
Concrete operations are as follows:
The zinc gray on scraping zinc liquid surface and oxide film, make workpiece enter pond hot dipping in the zinc liquid of cleaning.
Workpiece enters zinc liquid should be accurate, and steadily, under the premise that security is guaranteed, the time entering zinc liquid is short as far as possible, makes workpiece surface zinc layers thickness even; But can not be too fast, spatter in order to avoid zinc liquid is quick-fried;
After workpiece immerses zinc liquid completely, treat that the bubble on zinc liquid surface is drained, namely " boiling " phenomenon stops, firmly rock suspender or iron wire, zinc gray is floated, and the workpiece not easily rocked can be played to do by crane and be elevated several times, and when being elevated, not expose zinc liquid too many for workpiece, under the prerequisite ensureing workpiece galvanizing quality, the immersion plating time is short as far as possible;
Before workpiece proposes, want zinc gray and the oxide film on scraping zinc liquid surface equally; The speed control that workpiece proposes should be slow and rises, and should be parked in zinc liquid surface, dial and touch workpiece, make workpiece separated from each other, adhesion, wipe the list edge, the rolled tin that are bonded at workpiece surface simultaneously by bamboo cane fast off with iron after workpiece hangs out;
In production process, zinc liquid by consumption, therefore will constantly can supplement, and once, addition adds 10 kilograms of Alloy zinc by zinc per ton for per tour zincification, Alloy zinc; Meanwhile, Alloy zinc consumption rate is very fast, and the zinc coating thickness according to plating piece requires to do suitably to add; In addition, after zinc pond uses for some time, bottom meeting residual impurity, the impurity bottom periodic cleaning zinc pond;
(9) water-cooled
After workpiece hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 50-80 degree Celsius;
(10) zinc coating thickness inspection
After water-cooled, carry out zinc coating thickness inspection to workpiece, zinc coating thickness application thickness tester is tested, as defective in found zinc coating thickness, requires again to do over again;
(11) passivation
Workpiece after water-cooled, hang in deactivation slot with driving and carry out Passivation Treatment, passivating solution temperature is normal temperature, and passivation time is about 30s;
Due to the difference of subsequent technique process, separately palpus passivation and the workpiece not needing passivation, carry out passivation processing to needing the workpiece of passivation;
(12) inloading part
After thickness of workpiece is qualified, unloads suspender and carry out next step operation;
(13) grind, rebuild and final inspection
Visual inspection being carried out to workpiece, will careful polishing be carried out for needing the residual internal corner part of the part, particularly cadmia of polishing;
After having polished, the special zinc rich primer in the workpiece Northwest needing to repair is repaired;
To polishing, the workpiece repaired checks comprehensively, checks outward appearance and the adherence of workpiece, and carries out final inspection to finished product.
Claims (5)
1. a hot dip galvanizing process method, is characterized in that: its processing step is as follows:
(1) check before plating:
According to workpiece size, the different classify and pile up of shape; And workpiece is checked;
(2) suspension member
According to the size of workpiece, length, shape and binding method, differentiate to select special hanger or suspender belt to carry out suspension member;
(3) wash
With clear water, workpiece surface oil stain is cleaned up;
(4) acidic derusting
Adopt the rusty stain of hydrochloric acid removing workpiece surface, pickling time 30-90 minute;
(5) wash
With clear water, workpiece cleaning is clean;
(6) surface cleanliness inspection
By pH test paper test piece, ensure that pH value is in the scope of 6-8;
After pH value is qualified, minute inspection is carried out to workpiece surface, require to accomplish workpiece surface smooth pieces;
(7) plating is helped
Workpiece all immerses in the plating assistant agent containing zinc chloride and ammonium chloride, until workpiece does not emit bubble in plating assistant agent, hangs out workpiece and evacuation plating assistant agent;
(8) pot galvanize
Workpiece before zinc-plated, should determine temperature and the galvanizing time of zinc liquid depending on the characteristic of workpiece (as material, thickness etc.);
The workpiece of cleaning is immersed in zinc bath, make workpiece and fused zinc react the epithelium of generation one alloying;
(9) water-cooled
After workpiece hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 50-80 DEG C;
(10) zinc coating thickness inspection
Application thickness tester carries out zinc coating thickness inspection to workpiece;
(11) passivation
To needing the workpiece of passivation to carry out passivation processing, the workpiece after water-cooled, hanging in deactivation slot carry out Passivation Treatment with driving, passivating solution temperature is normal temperature, and passivation time is 20-60s;
(12) inloading part
After thickness of workpiece is qualified, unloads suspender and carry out next step operation;
(13) grind, rebuild and final inspection
Workpiece surface is polished, rebuilds, ensure the smooth of workpiece surface surfacing; Then check comprehensively.
2. hot dip galvanizing process method according to claim 1, is characterized in that: described step (8) helps in plated journey, and the time of workpiece leaching plating assistant agent should control at 1-3min.
3. hot dip galvanizing process method according to claim 1, is characterized in that: containing zinc chloride and ammonium chloride in described step (8) plating assistant agent, and zinc chloride and ammonium chloride are respectively and soak 0.5 ‰ and 1 ‰ of workpiece weight, and part by weight is 1:2.
4. hot dip galvanizing process method according to claim 1, is characterized in that: the zinc pot of described step (9) pot galvanize has following three kinds of specifications:
Article 1: long 15 meters, wide 2 meters, dark 2.5 meters;
Article 2: long 15 meters, wide 3 meters, dark 3.2 meters;
Article 3: long 9 meters, wide 1.6 meters, dark 2.3 meters;
Above galvanization production line can meet the requirement of all size type galvanized workpiece.
5. hot dip galvanizing process method according to claim 1, is characterized in that: workpiece is before zinc-plated in described step (9), should look temperature and the galvanizing time of the characteristic determination zinc liquid of workpiece; Wherein
Thickness of workpiece < 3mm, zinc liquid temperature is 440 DEG C, galvanizing time 1-2min;
3mm≤thickness of workpiece < 6mm, zinc liquid temperature is 440-445 DEG C, galvanizing time 2-5min;
Thickness of workpiece >=6mm, zinc liquid temperature is 445-450 DEG C, galvanizing time 5-8min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410850369.1A CN104561876B (en) | 2014-12-30 | 2014-12-30 | A kind of hot dip galvanizing process method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410850369.1A CN104561876B (en) | 2014-12-30 | 2014-12-30 | A kind of hot dip galvanizing process method |
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| CN104561876A true CN104561876A (en) | 2015-04-29 |
| CN104561876B CN104561876B (en) | 2017-11-07 |
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| CN104862576A (en) * | 2015-06-02 | 2015-08-26 | 金海新源电气江苏有限公司 | Treatment process for stainless steel profile for photovoltaic panel bracket |
| CN104975205A (en) * | 2015-06-02 | 2015-10-14 | 金海新源电气江苏有限公司 | Treatment process of aluminum alloy section for photovoltaic assembly support |
| CN105113729A (en) * | 2015-09-02 | 2015-12-02 | 深圳市云宇金属科技有限公司 | Rail material for building decoration and manufacturing method thereof |
| CN105331919A (en) * | 2015-12-03 | 2016-02-17 | 成都朋昌电力构件有限公司 | Metal part zinc dipping treatment process |
| CN105821362A (en) * | 2016-05-30 | 2016-08-03 | 浙江慧钢技术发展有限公司 | High-efficiency and environmentally-friendly hot dip galvanizing technique |
| CN106222594A (en) * | 2016-08-29 | 2016-12-14 | 桐乡市铁盛线路器材有限公司 | A kind of galvanization production line |
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| CN111945091A (en) * | 2019-05-15 | 2020-11-17 | 扬州澳洋顺昌金属材料有限公司 | Galvanizing production process |
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| JP2012518720A (en) * | 2009-02-25 | 2012-08-16 | 宝山鋼鉄股▲分▼有限公司 | Flexible strip processing line suitable for production of various high-strength steels |
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| CN104975205A (en) * | 2015-06-02 | 2015-10-14 | 金海新源电气江苏有限公司 | Treatment process of aluminum alloy section for photovoltaic assembly support |
| CN104862576A (en) * | 2015-06-02 | 2015-08-26 | 金海新源电气江苏有限公司 | Treatment process for stainless steel profile for photovoltaic panel bracket |
| CN105113729A (en) * | 2015-09-02 | 2015-12-02 | 深圳市云宇金属科技有限公司 | Rail material for building decoration and manufacturing method thereof |
| CN105331919A (en) * | 2015-12-03 | 2016-02-17 | 成都朋昌电力构件有限公司 | Metal part zinc dipping treatment process |
| CN105821362A (en) * | 2016-05-30 | 2016-08-03 | 浙江慧钢技术发展有限公司 | High-efficiency and environmentally-friendly hot dip galvanizing technique |
| CN106222594A (en) * | 2016-08-29 | 2016-12-14 | 桐乡市铁盛线路器材有限公司 | A kind of galvanization production line |
| CN107794474A (en) * | 2016-08-31 | 2018-03-13 | 浙江通兴铁塔有限公司 | A kind of rare earth alloy hot-dip galvanizing technique |
| CN108950571A (en) * | 2018-07-02 | 2018-12-07 | 安徽坤和电气有限公司 | A kind of electric wire cable bridge process of surface treatment |
| CN108950571B (en) * | 2018-07-02 | 2020-12-25 | 安徽天彩电缆集团有限公司 | Surface treatment process for wire and cable bridge |
| CN111945091A (en) * | 2019-05-15 | 2020-11-17 | 扬州澳洋顺昌金属材料有限公司 | Galvanizing production process |
| CN110983221A (en) * | 2019-12-23 | 2020-04-10 | 程顺平 | Hot galvanizing process |
| CN110983221B (en) * | 2019-12-23 | 2022-08-30 | 佛山市钊诚金属制品有限公司 | Hot galvanizing process |
| CN111304570A (en) * | 2020-04-26 | 2020-06-19 | 徐州瑞马科宝金属制品有限公司 | Hot galvanizing production process with high automation degree |
| CN112159945A (en) * | 2020-10-30 | 2021-01-01 | 保定新胜冷却设备有限公司 | Hot galvanizing process for main body of air cooler |
| CN113073279A (en) * | 2021-03-24 | 2021-07-06 | 重庆广仁铁塔制造有限公司 | Sub-photochemical process for surface of low-manganese-content steel member of power iron tower and sub-photochemical iron tower |
| WO2022199342A1 (en) * | 2021-03-24 | 2022-09-29 | 重庆广仁铁塔制造有限公司 | Surface matting process for low-manganese-content steel component of electric power iron tower and matte iron tower |
| CN113774304A (en) * | 2021-09-18 | 2021-12-10 | 安徽长青建筑制品有限公司 | Economical and practical hot galvanizing process |
| CN114032484A (en) * | 2021-11-16 | 2022-02-11 | 张家港市恒强冷却设备有限公司 | Hot galvanizing process for main body of generator air cooler |
| CN114032484B (en) * | 2021-11-16 | 2023-07-21 | 张家港市恒强冷却设备有限公司 | Hot galvanizing process for generator air cooler main body |
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