CN1085264A - A kind of alloy for hot-dip flux - Google Patents
A kind of alloy for hot-dip flux Download PDFInfo
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- CN1085264A CN1085264A CN 93117180 CN93117180A CN1085264A CN 1085264 A CN1085264 A CN 1085264A CN 93117180 CN93117180 CN 93117180 CN 93117180 A CN93117180 A CN 93117180A CN 1085264 A CN1085264 A CN 1085264A
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- flux
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Abstract
The invention belongs to the alloy for hot-dip field of metallic substance.Be applicable to the metal part surface hot dip process Zn-Al alloy flux of flux method.Flux of the present invention overcomes weak point in the prior art, selects ZnCl
2And NH
4The eutectic composition of Cl also adds an amount of ethylene glycol and makes additive.This flux can suppress the replacement(metathesis)reaction of Aluminum in Alloy, and promotes the rapid evaporation of flux when hot dip process.This flux has good quality product behind the goods alloy for hot-dip, no plating leakage and bubbling, phenomenon such as scab, and product surface is smoothly bright.
Description
The invention belongs to the alloy for hot-dip field of metallic substance.Employed flux when being applicable to flux method to the surperficial alloy for hot-dip of metallic substance component.
In existing hot-dip coated technology, from the zinc-plated galvanizing aluminium alloy that developed into, promptly in zinc, improve the content of aluminium, and add other element of trace, to improve its immersion plating and resistance to atmospheric corrosion.For example having become commercial zinc aluminum alloy coating product has the Galfan Coated Steel, Galvalume Coated Steel and Superzinc Coated Steel.These product resistance to atmospheric corrosions are 2-6 times of common galvanized sheet.Yet the said products all adopts Sendzimir method production, promptly can only be in hydrogen reduction method alloy-plated layer.Characteristics such as therefore the said products has that equipment is many, complex process and investment are big.Adopting flux method to produce the galvanizing aluminium alloy at present is a kind of method of easy economy, and the zinc-plated aluminium flux that uses has NH
4Full Heshui solution of Cl and ZnCl
23NH
4The full Heshui solution of Cl etc., the shortcoming of using these flux is that product is easy to generate defectives such as plating leakage, pin hole, bulge and dry slag.Therefore influence the erosion resistance and the visual appearance of product.In " first whole nation pot galvanize, aluminium seminar collection of thesis " neutralization Japan " the clear 64-5110 of special permission communique ", add the hot-dip aluminum zinc flux of low amount of fluorinated thing in addition, for example add KF, NaF and NH
4F etc.Though can solve the plating leakage problem of coating, product still has quality problems such as bulge, surface irregularity.
The objective of the invention is to propose a kind of economy, the metal hot dipping alloy flux of the simple and safe and good product quality of production technique.
According to purpose of the present invention, the flux of the galvanizing aluminium alloy that we proposed, its concrete chemical composition range is (weight %) ZnCl
240～48%, NH
4Cl 5～7%, ethylene glycol 2～5%, H
2O 42～53%.
Flux of the present invention is by ZnCl
2, NG
4Cl and organic additive ethylene glycol are formed.According to composition range proportioning of the present invention, can make ZnCl
2And NH
4Two kinds of salt formation eutectic compositions of Cl, its eutectic point is at 230 ℃, and boiling point is about 365 ℃.The viscosity minimum of flux under this composition range proportioning breaks away from and evaporation from steel surface when hot dip process easily.In flux of the present invention, add ethylene glycol and can not only make the flux coating evenly, but also can promote the rapid evaporation of flux and suppress the reaction of aluminium in flux and the molten alloy effectively, the AlCl that enables to form
3Amount drops to minimum level, thereby reaches the purpose of the surface quality of improving coating.
Adopting flux method production hot dip process Zn-Al alloy is a kind of economy, effective method of coating, and its key is the selection of flux component.This production method be with metalwork behind oil removing, rust cleaning and oxide film, at its breach surface dip-coating one deck flux, after the drying, immersion plating is in fused Zn-Al alloy liquid again, stop tens of seconds to several minutes (deciding) according to plating piece thermal capacity, the metal products surface reacted with molten fused Zn-Al alloy liquid and formed one deck zinc-iron alloy layer with atomic diffusion this moment, and its product surface is still adhered to one deck fused alloy when goods are suggested the alloy liquation.Therefore, obtain the metal products with two-layer coating of metallurgical binding.Consider the characteristics that flux method hot dip process Zn-Al alloy is had, what the present invention was designed is eutectic composition flux, and flux viscosity minimum, can be easy to the surface of dip-coating equably at metal products, the goods that keep having been cleaned out can be by recontaminate and oxidation.When the hot dip process Zn-Al alloy, because the boiling point of flux of the present invention is only about 365 ℃, when dip-coating had the metal products of flux of the present invention to enter in the Zn-Al alloy liquation, flux can evaporate and effectively reduce AlCl rapidly completely
3The formation of amount makes that molten alloy is easier to react with the metal products surface and carry out atomic diffusion and form alloy layer.Since have the first layer molten alloy layer infiltration firmly and complete, so just can obtain characteristics such as the light of final Zn-Al coating, level and smooth, free of pinholes plating leakage and bubbling.
Flux of the present invention has compared with prior art that production method is simple, facility investment is few, and is economical and be easy to produce characteristics such as enforcement.Flux of the present invention is compared with the flux of existing flux method hot dip process Zn-Al alloy, and it is good to have an end product quality, metal coating surface light, level and smooth, free of pinholes plating leakage and bubbling phenomenon.Another characteristics are not have fluoridize owing in the flux of the present invention, so when producing enforcement, flux of the present invention does not contain fluoride pollution to environment.
Embodiment
Embodiment of the invention sample is to adopt mild steel plate, and its plate size is totally 7 of 350 * 80 * 0.3mm, and embodiment adopts traditional flux method hot dip process Zn-Al alloy.At first be to adopt chemical process that every block plate is removed surface and oil contaminant and oxide film, then in the residual acid solution of removing surface of steel plate through washing.Embodiment has exemplified the flux of 3 kinds of content of the present invention altogether in the composition range of flux of the present invention, in order to contrast conveniently, has also made the flux of four kinds of other compositions simultaneously, its each flux component contrast all in the embodiment table example go out.For the better effect that compares each flux to the hot dip alloy layer, we adopt identical production technique and alloy electroplating bath, promptly behind the flux of every block plate dip-coating heterogeneity, all 200 ℃ of oven dry down, each steel plate that will scribble flux then immerses in the fused Zn-Al alloy liquation, and this Zn-Al alloy liquation composition is (weight %) 90%Zn-5%Al-0.03%Re.The immersion plating temperature is 430 ℃, and the immersion plating time is 40 seconds.In the embodiment table, list file names with the comparison of each steel plate coating final effect.Judgement criteria in the embodiment table is all by 5 fens its product surface qualities of system evaluation.According to the embodiment table as can be seen, have good visual appearance by the product that flux of the present invention plated out, free of pinholes plating leakage, bubbling, phenomenon such as scab.Obviously be better than other flux of the prior art.
Given in the embodiment table is the evaluation of concrete chemical ingredients He each quality product of each flux, and sequence number 1-3 is the concrete composition of flux of the present invention in its table, and sequence number 4-7 is the composition of contrast flux in the prior art.
The embodiment table
| Sequence number | The flux chemical ingredients, weight % | ||||
| ZnCl 2 NH 4Cl ethylene glycol H 2O | The pin hole plating leakage | Bubbling scabs | Light is level and smooth | Moire zinc flower | |
| 1 | 40 5 2 53 | 5 | 5 | 5 | 5 |
| 2 | 46 6 2 46 | 5 | 5 | 5 | 5 |
| 3 | 48 7 3 42 | 5 | 5 | 5 | 5 |
| 4 | 47 6 － 47 | 5 | 2 | 2 | 3 |
| 5 | 26 5 4(KF) 65 | 5 | 3 | 3 | 4 |
| 6 | 26 5 4(NH 4F) 65 | 5 | 3 | 3 | 4 |
| 7 | 3NH 4C·ZnCl 2Saturated aqueous solution | 4 | 2 | 2 | 2 |
Claims (1)
- A kind of hot dip process Zn-Al alloy flux, the concrete chemical ingredients that it is characterized in that this flux is (weight %): ZnCl 240～48%, NH 4Cl5～7%, ethylene glycol 2～5%, H 2O 42～53%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93117180 CN1028301C (en) | 1993-09-16 | 1993-09-16 | Fusing agent for hot dip-coating of alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93117180 CN1028301C (en) | 1993-09-16 | 1993-09-16 | Fusing agent for hot dip-coating of alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1085264A true CN1085264A (en) | 1994-04-13 |
| CN1028301C CN1028301C (en) | 1995-04-26 |
Family
ID=4991910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93117180 Expired - Fee Related CN1028301C (en) | 1993-09-16 | 1993-09-16 | Fusing agent for hot dip-coating of alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028301C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400076A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Hot-dipped tin-zinc alloy steel plate used for fuel tank and manufacture method thereof |
| CN102492912A (en) * | 2011-12-20 | 2012-06-13 | 天津市盖尔发金属制品有限公司 | Formula and use method of single galvanizing-10% aluminum-rare earth alloy flux |
-
1993
- 1993-09-16 CN CN 93117180 patent/CN1028301C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400076A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | Hot-dipped tin-zinc alloy steel plate used for fuel tank and manufacture method thereof |
| CN102400076B (en) * | 2010-09-07 | 2014-03-12 | 鞍钢股份有限公司 | Hot-dipped tin-zinc alloy steel plate used for fuel tank and manufacture method thereof |
| CN102492912A (en) * | 2011-12-20 | 2012-06-13 | 天津市盖尔发金属制品有限公司 | Formula and use method of single galvanizing-10% aluminum-rare earth alloy flux |
| CN102492912B (en) * | 2011-12-20 | 2013-07-10 | 天津市盖尔发金属制品有限公司 | Single galvanizing-10% aluminum-rare earth alloy flux and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1028301C (en) | 1995-04-26 |
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