CN103806038A - Preparation method for low-hydrogen fragile zinc-nickel alloy electroplated layer - Google Patents
Preparation method for low-hydrogen fragile zinc-nickel alloy electroplated layer Download PDFInfo
- Publication number
- CN103806038A CN103806038A CN201210451680.XA CN201210451680A CN103806038A CN 103806038 A CN103806038 A CN 103806038A CN 201210451680 A CN201210451680 A CN 201210451680A CN 103806038 A CN103806038 A CN 103806038A
- Authority
- CN
- China
- Prior art keywords
- zinc
- nickel alloy
- hydrogen
- controlled
- steel part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a preparation method for a low-hydrogen fragile zinc-nickel alloy electroplated layer. The preparation method is characterized in that a process for an electroplated zinc-nickel alloy coating is as follows: 70-80g/L of ZnCl2, 100-120g/L of NiCl2.6H2O, 30-40g/L of KCl, 190-210g/L of NH4Cl, 20-30g/L of H3BO3, 0.5-1g/L of 2-mercapto benzimidazole cyclohexylamine salt, 0.5-1g/L of benzimidazole, 0.5-1g/L of citric acid and 0.5-1g/L of oxalic acid. The current density is 1.5A/dm<2>-2.7A/dm<2>; the temperature is 30-40 DEG C; the pH (Potential of Hydrogen) value is 5-6.5. According to the method, seepage hydrogen of high-strength in the electroplating process can be effectively reduced, and the obtained zinc-nickel electroplated layer has low hydrogen fragility and a good protection performance.
Description
Technical field
The present invention relates to metal protection technical field, specifically refer to a kind of preparation method of low hydrogen embrittlement Zinc-nickel alloy electroplating layer.
Background technology
Iron and steel workpieces is easy to corrosion in air, therefore after part processing, all needs to protect, and conventionally adopts plating mode at iron and steel workpieces Surface Creation skim armour metal layer, as zinc layer, cadmium layer, admiro layer etc.
In electroplating process, oil removing operation, pickling process and electroplating work procedure have hydrogen atom to generate, and hydrogen penetrates in part base solid iron and steel and causes lattice distortion, are prone to hydrogen embrittlement fracture and cause quality fault.Hydrogen atom does not affect the steel of tensile strength lower (1050Mpa following), but the steel impact that tensile strength is greater than to 1240MPa obviously, and the intensity level of steel is higher, more responsive to hydrogen.In order to reduce to electroplate the metallic matrix impact of the hydrogen producing on iron and steel workpieces, in prior art, conventionally take anode oil removing, weak burn into strictly to control the approach such as electroplating process parameter and reduce amount of hydrogen infiltration, simultaneously after armour metal layer, adopt the high bake also can remove portion hydrogen atom electroplating, as plating admiro part taked to remove a part of hydrogen in high temperature (220 ± 10 ℃) baking.But prior art easily in coating surface generation oxidation stain, makes coating be difficult to passivation in to plating admiro part high bake dehydrogenation operation, etch resistant properties reduces, and does not reach requirement of shelter, thereby the application of electroplated zinc nickel alloy is restricted.
The method of CN101994140A high-strength steel electroplated zinc nickel alloy dehydrogenation, comprises the steps: 1) by the cleaning of the high-duty steel part of plating admiro successively water with alcohol-pickled; 2) part through clean is inserted to heat treated in vacuum oven, coating surface hydrogen atom is overflowed; 3) part through dehydrogenation is placed in to citric acid-boric acid mixed aqueous solution activation treatment; 4) to again carrying out Zinc-nickel alloy electroplating through the part of coating activation treatment; 5) will be placed in chromic anhydride-sodium-chlor mixed aqueous solution Passivation Treatment through the part of multiple electroplating processes; 6) part through Passivation Treatment is cleaned, dried up with clear water, can obtain satisfactory finished product.Utilize the method can effectively remove the hydrogen that infiltrates matrix metal in electroplated zinc nickel alloy process, reduce the generation of hydrogen embrittlement, and can be at the good passive film of alloy layer Surface Creation barrier propterty, meanwhile, processing method of the present invention is simple, low production cost.
When but aforesaid method is not considered electroplated zinc nickel alloy layer, matrix is oozed the hydrogen embrittlement performance of the impact of hydrogen and the admiro layer itself that plating obtains.The hydrogen embrittlement performance of admiro layer itself is too low while easily causing admiro layer to stretch easily fracture affect its barrier propterty, and electroplated zinc nickel alloy is oozing hydrogen and also can affect the performance of matrix matrix.
Summary of the invention
For the deficiencies in the prior art, one of object of the present invention is to provide a kind of preparation method of low hydrogen embrittlement Zinc-nickel alloy electroplating layer.Described method can effectively reduce the hydrogen that oozes to high-strength steel while plating, and acquisition Zinc-Nickel coating layer has low hydrogen embrittlement, good barrier propterty.
Component and the electroplating technology of the present invention to Zinc-nickel alloy electroplating liquid carried out large quantity research, thereby realized the present invention by changing the content of each component and the kind of additive and electroplating parameter.
For achieving the above object, the preparation method of the designed low hydrogen embrittlement Zinc-nickel alloy electroplating layer of the present invention, is characterized in that: the technique of electroplated zinc nickel alloy coating is: 70-80g/L ZnCl2,100-120g/LNiCl26H2O, 30-40g/LKCl, 190-210g/L NH4Cl, 20-30g/L H3BO3,0.5-1g/L 2-mercaptobenzimidazole cyclohexylamine salt, 0.5-1g/L benzoglyoxaline, 0.5-1g/L citric acid, 0.5-1g/L oxalic acid; Current density 1.5A/dm2～2.7A/dm2; 30～40 ℃ of temperature; PH value 5～6.5.
The preparation method of a kind of low hydrogen embrittlement Zinc-nickel alloy electroplating layer of the present invention, mainly comprises the steps:
1) clean: 10～45 the water of the high-duty steel part after plating admiro is cleaned to 1～2min, then high-duty steel part is immersed in to 3～5min in alcohol;
2) dehydrogenation: will insert in vacuum oven and heat through the high-duty steel part of clean, in vacuum oven, pressure-controlling be 1 × 10
-4～1 × 10
-3pa, heating and temperature control, 220 ± 10, are controlled at and are not less than 8h heat-up time, and the hydrogen atom of coating surface is overflowed;
3) coating activation: activate 10～25s by being placed in citric acid-boric acid mixed aqueous solution through the high-duty steel part of dehydrogenation, in described citric acid-boric acid mixed aqueous solution, the concentration of citric acid is controlled at 60～80g/l, and the concentration of boric acid is controlled at 20～40g/l;
4) telegram in reply plating: to again carrying out Zinc-nickel alloy electroplating through the high-duty steel part of coating activation treatment, electroplating time is controlled at 4～6min;
5) passivation: will be placed in chromic anhydride-sodium-chlor mixed aqueous solution passivation 30～60s through the high-duty steel part of multiple electroplating processes, in described chromic anhydride-sodium-chlor mixed aqueous solution, the concentration of chromic anhydride is controlled at 5～10g/l, the concentration of sodium-chlor is controlled at 10～20g/l, and temperature is controlled at 50～55 ℃;
6) dry: the high-duty steel part through Passivation Treatment to be cleaned, dried up with clear water, obtain satisfactory finished product.
Further, said step 2) in, the high-duty steel part for tensile strength at 1050～1450MPa, is controlled at and is not less than 8h heat-up time; High-duty steel part for tensile strength at 1450～1800MPa, is controlled at and is not less than 18h heat-up time; High-duty steel part for tensile strength more than 1800MPa, is controlled at and is not less than 24h heat-up time.Because the high-strength steel that tensile strength is higher is more responsive to hydrogen, the present invention is directed to the high-duty steel part that tensile strength is higher, the dehydrogenation time of taking is longer, and dehydrogenation effect is relatively better.
A step ground again, said step 2) in, the high-duty steel part for tensile strength at 1050～1450MPa, is controlled at 8～18h heat-up time; High-duty steel part for tensile strength at 1450～1800MPa, is controlled at 18～24h heat-up time; High-duty steel part for tensile strength more than 1800MPa, is controlled at 24～36h heat-up time.Like this, reach desirable effect except Hydrogen Energy, and can also save energy, avoid waste.
Further, said step 3) in, in citric acid-boric acid mixed aqueous solution, the concentration of citric acid is controlled at 70g/l, and the concentration of boric acid is controlled at 30g/l.Select the mixed aqueous solution of this concentration to carry out the coating after activation treatment to high-strength steel, more easily combine closely with the new coating of telegram in reply plating generation, reach favourable protection effect.
The method of dehydrogenation of the present invention is immersed in high-duty steel part 3～5min in alcohol in cleaning step, and the organic impurities adhering to for removing piece surface is conducive to carry out carrying out smoothly of dehydrogenation and subsequent operations.When dehydrogenation, can put into vacuum oven by being dried part, sealing door, vacuumizes processing, and the pressure in vacuum oven reaches 1 × 10
-2～1 × 10
-3when Pa, start to heat, continue to vacuumize processing, when pressure reaches 1 × 10
-4～1 × 10
-3pa, temperature start timing while reaching 220 ± 10 ℃.At the temperature of this pressure range and 220 ℃ of left and right, hydrogen atom more easily overflows, thereby effectively reaches dehydrogenation object.And, in vacuum environment, heat, can make the zone of oxidation of coating surface significantly reduce.Meanwhile, for the product made from steel of different tensile strength, control the different dehydrogenation time, in the time that tensile strength increases, the dehydrogenation time extends relatively, thereby obtains preferably effect.Coating adopts citric acid-boric acid mixed aqueous solution activation treatment 10～25s, can strengthen the bonding force of multiple coating and former coating.Part, after multiple electroplating processes, can generate new nickel alloy coating at former coating surface, and the atoms metal of new nickel alloy coating is activated state, easily passivation.After Passivation Treatment, on alloy layer, can generate fine and close passivation film, thereby significantly strengthen the etch resistant properties of coating.
The method of dehydrogenation of the present invention is by cleaning, dehydrogenation, coating activation, telegram in reply plating and Passivation Treatment, can effectively remove the hydrogen that matrix metal infiltrates in the time of electroplated zinc nickel alloy, reduce the generation of hydrogen embrittlement, there is not oxidation stain in coating simultaneously, after Passivation Treatment, can generate the passive film that barrier propterty is good, realize the effective protection to high-duty steel part.Meanwhile, processing method of the present invention is simple, low production cost, can widen the range of application of electroplated zinc nickel alloy.
The hydrogen that oozes to high-strength steel when the present invention effectively reduces plating by changing the content of each component and the kind of additive and electroplating parameter, and acquisition Zinc-Nickel coating layer has low hydrogen embrittlement, good barrier propterty.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment helps to understand the present invention, should not be considered as concrete restriction of the present invention.
Embodiment 1
Adopt the high-strength steel that tensile strength is 1050MPa to prepare part, it carried out to plating admiro art breading, then carry out in accordance with the following steps dehydrogenation operation:
1) clean: will after plating admiro, clean 1～2min by 45 ℃ of water of high-duty steel part, and surperficial debris be cleaned, then high-duty steel part is soaked to 3min in alcohol, for removing the organic impurities of surface attachment;
2) dehydrogenation: the high-duty steel part of clean is adopted to vacuum dehydrogenation processing.To be dried part and put into vacuum oven, sealing door, vacuumizes processing, and the pressure in vacuum oven reaches 1 × 10
-2pa, starts to heat, and continues to vacuumize processing, when pressure reaches 1 × 10
-3pa, temperature starts timing while reaching 210 ℃, keeps this pressure and temperature 8h;
3) coating activation: the high-duty steel part after dehydrogenation is placed in to citric acid-boric acid mixed aqueous solution and activates 25s, in described citric acid-boric acid mixed aqueous solution, the concentration of citric acid is controlled at 60g/l, and the concentration of boric acid is controlled at 20g/l;
4) telegram in reply plating: the high-duty steel part through coating activation treatment is carried out to Zinc-nickel alloy electroplating again, and the time is controlled as 4min.Electroplated zinc nickel alloy coating: 70g/L ZnCl
2, 100g/L NiCl
26H
2o, 30g/L KCl, 190g/L NH
4cl, 20g/L H
3bO
3, 0.5g/L 2-mercaptobenzimidazole cyclohexylamine salt, 0.5g/L benzoglyoxaline, 0.5g/L citric acid, 0.5g/L oxalic acid; Current density 1.5A/dm
2; 30 ℃ of temperature; PH value 5.
5) passivation: will be placed in chromic anhydride-sodium-chlor mixed aqueous solution passivation 60s through the high-duty steel part of multiple electroplating processes, in described chromic anhydride-sodium-chlor mixed aqueous solution, the concentration of chromic anhydride is controlled at 5g/l, the concentration of sodium-chlor is controlled at 10g/l, and temperature is controlled at 50 ℃;
6) dry: the high-duty steel part through Passivation Treatment to be cleaned, dried up with clear water, obtain satisfactory finished product.
To through above-mentioned steps part after treatment, adopt HB5067 standard method to detect hydrogen embrittlement, add 75% δ bH, testpieces is not fracture in 300h.Testpieces is pressed GB/T10125 standard method through neutral salt spray test, observes part after 120h, and white corrosion product does not appear in piece surface.
Embodiment 2
Adopt the high-strength steel that tensile strength is 1500MPa to prepare part, it carried out to plating admiro art breading, then carry out in accordance with the following steps dehydrogenation operation:
1) clean: will after plating admiro, clean 2min by 10 ℃ of water of high-duty steel part, and surperficial debris be cleaned, then high-duty steel part is soaked to 4min in alcohol, for removing the organic impurities of surface attachment;
2) dehydrogenation: the high-duty steel part of clean is adopted to vacuum dehydrogenation processing.To be dried part and put into vacuum oven, sealing door, vacuumizes processing, and the pressure in vacuum oven reaches 1 × 10
-2pa, starts to heat, and continues to vacuumize processing, when pressure reaches 1 × 10
-4pa, temperature starts timing while reaching 220 ℃, keeps this pressure and temperature 18h;
3) coating activation: the high-duty steel part after dehydrogenation is placed in to citric acid-boric acid mixed aqueous solution and activates 20s, in described citric acid-boric acid mixed aqueous solution, the concentration of citric acid is controlled at 70g/l, and the concentration of boric acid is controlled at 30g/l;
4) telegram in reply plating: the high-duty steel part through coating activation treatment is carried out to Zinc-nickel alloy electroplating again, and electroplating time control is 5min.The technique of electroplated zinc nickel alloy coating is: 80g/L ZnCl2,120g/LNiCl26H2O, 40g/LKCl, 210g/L NH4Cl, 30g/L H3BO3,1g/L 2-mercaptobenzimidazole cyclohexylamine salt, 1g/L benzoglyoxaline, 1g/L citric acid, 1g/L oxalic acid; Current density 2.7A/dm2; 40 ℃ of temperature; PH value 6.5.
5) passivation: will be placed in chromic anhydride-sodium-chlor mixed aqueous solution passivation 30s through the high-duty steel part of multiple electroplating processes, in described chromic anhydride-sodium-chlor mixed aqueous solution, the concentration of chromic anhydride is controlled at 10g/l, the concentration of sodium-chlor is controlled at 20g/l, and temperature is controlled at 55 ℃;
6) dry: the high-duty steel part through Passivation Treatment to be cleaned, dried up with clear water, obtain satisfactory finished product.
To through above-mentioned steps part after treatment, adopt HB5067 standard method to detect hydrogen embrittlement, add 75% δ bH, testpieces is not fracture in 300h.Testpieces is pressed GB/T10125 standard method through neutral salt spray test, observes part after 150h, and white corrosion product does not appear in piece surface.
Embodiment 3
Adopt the high-strength steel that tensile strength is 1850MPa to prepare part, it carried out to plating admiro art breading, then carry out in accordance with the following steps dehydrogenation operation:
1) clean: will after plating admiro, clean 1min by 40 ℃ of water of high-duty steel part, and surperficial debris be cleaned, then high-duty steel part is soaked to 5min in alcohol, for removing the organic impurities of surface attachment;
2) dehydrogenation: the high-duty steel part of clean is adopted to vacuum dehydrogenation processing.To be dried part and put into vacuum oven, sealing door, vacuumizes processing, and the pressure in vacuum oven reaches 1 × 10
-2pa, starts to heat, and continues to vacuumize processing, when pressure reaches 5 × 10
-4pa, temperature starts timing while reaching 230 ℃, keeps this pressure and temperature 24h;
3) coating activation: the high-duty steel part after dehydrogenation is placed in to citric acid-boric acid mixed aqueous solution and activates 10s, in described citric acid-boric acid mixed aqueous solution, the concentration of citric acid is controlled at 80g/l, and the concentration of boric acid is controlled at 40g/l;
4) telegram in reply plating: the high-duty steel part through coating activation treatment is carried out to Zinc-nickel alloy electroplating again, and electroplating time control is 6min.The technique of electroplated zinc nickel alloy coating is: 75g/L ZnCl2,110g/LNiCl26H2O, 35g/LKCl, 200g/L NH4Cl, 25g/L H3BO3,0.75g/L 2-mercaptobenzimidazole cyclohexylamine salt, 0.75g/L benzoglyoxaline, 0.75g/L citric acid, 0.75g/L oxalic acid; Current density 2A/dm2; 35 ℃ of temperature; PH value 6.
5) passivation: will be placed in chromic anhydride-sodium-chlor mixed aqueous solution passivation 50s through the high-duty steel part of multiple electroplating processes, in described chromic anhydride-sodium-chlor mixed aqueous solution, the concentration of chromic anhydride is controlled at 8g/l, the concentration of sodium-chlor is controlled at 15g/l, and temperature is controlled at 50 ℃;
6) dry: the high-duty steel part through Passivation Treatment to be cleaned, dried up with clear water, obtain satisfactory finished product.
To through above-mentioned steps part after treatment, adopt HB5067 standard method to detect hydrogen embrittlement, add 75% δ bH, testpieces is not fracture in 300h.Testpieces is pressed GB/T10125 standard method through neutral salt spray test, observes part after 120h, and white corrosion product does not appear in piece surface.
Embodiment 4
Adopt the high-strength steel that tensile strength is 1200MPa to prepare part, it carried out to plating admiro art breading, then carry out in accordance with the following steps dehydrogenation operation:
1) clean: will after plating admiro, clean 2min by 30 ℃ of water of high-duty steel part, and surperficial debris be cleaned, then high-duty steel part is soaked to 3min in alcohol, for removing the organic impurities of surface attachment;
2) dehydrogenation: the high-duty steel part of clean is adopted to vacuum dehydrogenation processing.To be dried part and put into vacuum oven, sealing door, vacuumizes processing, and the pressure in vacuum oven reaches 1 × 10
-2pa, starts to heat, and continues to vacuumize processing, when pressure reaches 5 × 10
-4pa, temperature starts timing while reaching 225 ℃, keeps this pressure and temperature 18h;
3) coating activation: the high-duty steel part after dehydrogenation is placed in to citric acid-boric acid mixed aqueous solution and activates 15s, in described citric acid-boric acid mixed aqueous solution, the concentration of citric acid is controlled at 65g/l, and the concentration of boric acid is controlled at 35g/l;
4) telegram in reply plating: the high-duty steel part through coating activation treatment is carried out to Zinc-nickel alloy electroplating again, and electroplating time control is 5.5min.The technique of electroplated zinc nickel alloy coating is: 75g/L ZnCl2,110g/LNiCl26H2O, 35g/LKCl, 200g/L NH4Cl, 25g/L H3BO3,0.5g/L 2-mercaptobenzimidazole cyclohexylamine salt, 0.5g/L benzoglyoxaline, 0.5g/L citric acid, 0.5g/L oxalic acid; Current density 1.5A/dm2; 30 ℃ of temperature; PH value 5.
5) passivation: will be placed in chromic anhydride-sodium-chlor mixed aqueous solution passivation 40s through the high-duty steel part of multiple electroplating processes, in described chromic anhydride-sodium-chlor mixed aqueous solution, the concentration of chromic anhydride is controlled at 8g/l, the concentration of sodium-chlor is controlled at 15g/l, and temperature is controlled at 53 ℃;
6) dry: the high-duty steel part through Passivation Treatment to be cleaned, dried up with clear water, obtain satisfactory finished product.
To through above-mentioned steps part after treatment, adopt HB5067 standard method to detect hydrogen embrittlement, add 75% δ bH, testpieces is not fracture in 280h.Testpieces is pressed GB/T10125 standard method through neutral salt spray test, observes part after 150h, and white corrosion product does not appear in piece surface.
Embodiment 5
Adopt the high-strength steel that tensile strength is 1650MPa to prepare part, it carried out to plating admiro art breading, then carry out in accordance with the following steps dehydrogenation operation:
1) clean: will after plating admiro, clean 2min by 20 ℃ of water of high-duty steel part, and surperficial debris be cleaned, then high-duty steel part is soaked to 5min in alcohol, for removing the organic impurities of surface attachment;
2) dehydrogenation: the high-duty steel part of clean is adopted to vacuum dehydrogenation processing.To be dried part and put into vacuum oven, sealing door, vacuumizes processing, and the pressure in vacuum oven reaches 1 × 10
-2pa, starts to heat, and continues to vacuumize processing, when pressure reaches 6 × 10
-4pa, temperature starts timing while reaching 215 ℃, keeps this pressure and temperature 24h;
3) coating activation: the high-duty steel part after dehydrogenation is placed in to citric acid-boric acid mixed aqueous solution and activates 20s, in described citric acid-boric acid mixed aqueous solution, the concentration of citric acid is controlled at 65g/l, and the concentration of boric acid is controlled at 30g/l;
4) telegram in reply plating: the high-duty steel part through coating activation treatment is carried out to Zinc-nickel alloy electroplating again, and electroplating time control is 5min.The technique of electroplated zinc nickel alloy coating is: 75g/L ZnCl2,110g/LNiCl26H2O, 35g/LKCl, 200g/L NH4Cl, 25g/L H3BO3,1g/L 2-mercaptobenzimidazole cyclohexylamine salt, 1g/L benzoglyoxaline, 1g/L citric acid, 1g/L oxalic acid; Current density 2.7A/dm2; 40 ℃ of temperature; PH value 6.5.
5) passivation: will be placed in chromic anhydride-sodium-chlor mixed aqueous solution passivation 50s through the high-duty steel part of multiple electroplating processes, in described chromic anhydride-sodium-chlor mixed aqueous solution, the concentration of chromic anhydride is controlled at 9g/l, the concentration of sodium-chlor is controlled at 18g/l, and temperature is controlled at 53 ℃;
6) dry: the high-duty steel part through Passivation Treatment to be cleaned, dried up with clear water, obtain satisfactory finished product.
To through above-mentioned steps part after treatment, adopt HB5067 standard method to detect hydrogen embrittlement, add 75% δ bH, testpieces is not fracture in 280h.Testpieces is pressed GB/T10125 standard method through neutral salt spray test, observes part after 150h, and white corrosion product does not appear in piece surface.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, and the selections of the equivalence replacement to the each raw material of product of the present invention and the interpolation of ancillary component, concrete mode etc., within all dropping on protection scope of the present invention and open scope.
Claims (10)
1. a preparation method for low hydrogen embrittlement Zinc-nickel alloy electroplating layer, is characterized in that: the technique of electroplated zinc nickel alloy coating is: 70-80g/L ZnCl2,100-120g/L NiCl26H2O, 30-40g/LKCl, 190-210g/L NH4Cl, 20-30g/L H3BO3,0.5-1g/L 2-mercaptobenzimidazole cyclohexylamine salt, 0.5-1g/L benzoglyoxaline, 0.5-1g/L citric acid, 0.5-1g/L oxalic acid; Current density 1.5A/dm2～2.7A/dm2; 30～40 ℃ of temperature; PH value 5～6.5.
2. method according to claim 1, ZnCl2 is 75g/L.
3. method according to claim 1, NiCl26H2O is 110g/L.
4. method according to claim 1, KCl is 35g/L.
5. method according to claim 1, NH4Cl is 200g/L.
6. method according to claim 1, H3BO3 is 25g/L.
7. method according to claim 1,2-mercaptobenzimidazole cyclohexylamine salt is 0.75g/L.
8. method according to claim 1, benzoglyoxaline is 0.75g/L.
9. method according to claim 1, citric acid is 0.75g/L.
10. method according to claim 1, oxalic acid is 0.75g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451680.XA CN103806038A (en) | 2012-11-12 | 2012-11-12 | Preparation method for low-hydrogen fragile zinc-nickel alloy electroplated layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451680.XA CN103806038A (en) | 2012-11-12 | 2012-11-12 | Preparation method for low-hydrogen fragile zinc-nickel alloy electroplated layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103806038A true CN103806038A (en) | 2014-05-21 |
Family
ID=50703404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210451680.XA Pending CN103806038A (en) | 2012-11-12 | 2012-11-12 | Preparation method for low-hydrogen fragile zinc-nickel alloy electroplated layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103806038A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651888A (en) * | 2015-03-04 | 2015-05-27 | 武汉风帆电镀技术股份有限公司 | High corrosion resistance zinc-nickel alloy electroplating additive with weak acidity to neutrality and electroplating liquid |
| CN105970254A (en) * | 2016-06-24 | 2016-09-28 | 武汉吉和昌化工科技股份有限公司 | Electroplate liquid having acidic all-chloride system for electroplating bright zinc-nickel alloys and electroplating process thereof |
| CN111647916A (en) * | 2020-07-14 | 2020-09-11 | 华业金属表面处理(五莲)有限公司 | Production process of alkaline electrogalvanizing |
-
2012
- 2012-11-12 CN CN201210451680.XA patent/CN103806038A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651888A (en) * | 2015-03-04 | 2015-05-27 | 武汉风帆电镀技术股份有限公司 | High corrosion resistance zinc-nickel alloy electroplating additive with weak acidity to neutrality and electroplating liquid |
| CN105970254A (en) * | 2016-06-24 | 2016-09-28 | 武汉吉和昌化工科技股份有限公司 | Electroplate liquid having acidic all-chloride system for electroplating bright zinc-nickel alloys and electroplating process thereof |
| CN111647916A (en) * | 2020-07-14 | 2020-09-11 | 华业金属表面处理(五莲)有限公司 | Production process of alkaline electrogalvanizing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101994140B (en) | The method of high-strength steel electroplated zinc nickel alloy dehydrogenation | |
| CN103014694B (en) | Rare-earth passivation method for improving corrosion resistance of chromium carbide coating on stainless steel surface | |
| CN103266313B (en) | A kind of electrogalvanizing environmental protection passivating solution and using method thereof | |
| CN104233408A (en) | Method for plating zinc and nickel on neodymium-iron-boron material | |
| CN102965703A (en) | Method for improving binding force of electro-galvanized layer on surface of neodymium-iron-boron permanent magnet | |
| CN104404580B (en) | A kind of pre-treating method improving rustless steel non-cyanide silver coating adhesion | |
| CN103014681A (en) | Preparation method of Ni-P alloy gradient coating | |
| CN103806038A (en) | Preparation method for low-hydrogen fragile zinc-nickel alloy electroplated layer | |
| CN104005063A (en) | Method for electroplating zinc and nickel alloy on steel work | |
| CN103325514A (en) | Corrosion-resistant neodymium iron boron magnetic material and production method thereof | |
| CN109208050A (en) | A kind of surface treatment method improving electrolytic copper foil corrosion resistance | |
| CN102312238A (en) | Preparation of zinc nickel plating layer and trivalent chromium passivation process thereof | |
| CN103014798B (en) | The electrodeposited chromium treatment process of iron-base sintered metal piece | |
| CN101525747A (en) | Clean rare-earth salt passivation solution | |
| CN103757632A (en) | Surface treatment method for permanent magnet material and permanent magnet material | |
| CN105331917A (en) | Method for plating surface of steel structure with zinc-nickel double-layer passive film | |
| CN104368818A (en) | Iron-based powder metallurgical material electroplating technology | |
| CN103774126B (en) | Electricimpulse improves the method for Ni-P Chemical Plating Layer thickness | |
| CN102965701A (en) | Nickel-plating and silver-plating technology for tellurium copper | |
| CN102691056A (en) | Method for treating chemical conversion coating on surface of magnesium alloy | |
| CN104404441A (en) | Preparation method for copper-plated steel band | |
| CN104294243B (en) | A kind of aluminum pipe nickel plating process | |
| CN107604405A (en) | Magneto neodymium iron boron magnetic materials electro-plating method | |
| CN103014820B (en) | A kind of method of burying sand electroplating cubic boron nitride | |
| CN104451792A (en) | Imitation gold electroplating method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |