CN105274583A - Preparing technique for trivalent chromium plating solution for electroplating window guard bars - Google Patents
Preparing technique for trivalent chromium plating solution for electroplating window guard bars Download PDFInfo
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- CN105274583A CN105274583A CN201510848871.3A CN201510848871A CN105274583A CN 105274583 A CN105274583 A CN 105274583A CN 201510848871 A CN201510848871 A CN 201510848871A CN 105274583 A CN105274583 A CN 105274583A
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Abstract
The invention discloses a preparing technique for trivalent chromium plating solution for electroplating window guard bars. The electroplating solution comprises the ingredients of chromium sulfate, boric acid, ammonium sulfate, potassium sulfate, magnesium sulfate, sodium formate, acetic acid, tartaric acid, glycerol, 2-ethyhexyl sodium sulfate and the balance water. A preparing method comprises the following steps of adding the half amount of water into a plating tank, heating the water to 65-70 DEG C, and then adding chromium sulfate; sequentially stirring and dissolving boric acid, ammonium sulfate, potassium sulfate and magnesium sulfate; adjusting the pH value to 3.7-4.2, keeping the temperature at 50-60 DEG C, and standing for 5-6 hours; sequentially adding the sodium formate, acetic acid, tartaric acid and glycerol, and stirring and dissolving; and adding 2-ethyhexyl sodium sulfate, and adding the rest of water after the 2-ethyhexyl sodium sulfate is dissolved.
Description
Technical field
The present invention relates to electroplating technology field, particularly relate to a kind of blending process of window rail plating trivalent chromium bath.
Background technology
Usually need outside the window of urban building to install protective grating additional, prevent stolen first, second prevent falling from high altitude.In prior art, early production adopts iron skill guardrail, outside mopping, and the time has been grown coat of paint and come off, the exposed corrosion of iron, not only unsightly but also lose proper function.Mostly adopt Stainless Steel Products now, although stainless steel can solve the problem of iron skill guardrail, cost is too high, greatly increases the burden of resident.The guardrail adopting chromeplated product is not also seen in prior art.
Publication number CN1993500A, title " chromium plating ", the method comprises the electrolytic bath providing a kind of trivalent chromium, oxalate, Tai-Ace S 150 and Sodium Fluoride, electric current is stimulated the menstrual flow from anode to lay substrate cathode electrolytic cell, maintain this electrolyzer need temperature and pH value and by trivalent chromium with required deposition rate to substrate.The present invention relates to a kind of electrolyzer for trivalent chromium plating, this electrolyzer comprises trivalent chromium source, oxalate, chromium sulphate and Sodium Fluoride, and wherein this electrolyzer operates at required temperature and required pH value.Its weak point: this technique contains the fluorochemical be extremely harmful to human body and environment, and this material easily volatilizees, thus cause Stability of Bath Solution poor.Due to human body and bad environmental, then lose the fundamental purpose that trivalent chromium plating belongs to environment-protection electroplating technique.
Publication number CN101092721A, title " electro-plating method of a kind of plating solution for trivalent chromium plating and this plating solution of use ", this plating solution contains open cylinder agent, stablizer, wetting agent and complexing agent, and iron(ic) chloride, wherein, the content of iron(ic) chloride is 0.5 ~ 7.5 grams per liter, this plating solution is also the Manganous chloride tetrahydrate of 0.1 ~ 1 grams per liter containing content, the pH value of this plating solution is 3.2 ~ 5, the content of open cylinder agent is 200 ~ 800 grams per liters, open cylinder agent comprises water soluble trivalent chromium salt and a kind of compound, and this compound is selected from one or more in the hungry and boric acid of Repone K, sodium-chlor, chlorination; The content of described stablizer is 20 ~ 120 milliliters/liter, and stablizer is selected from one or more in Australia's money, Padil and glycerol; The content of described wetting agent is 0.5 ~ 10 milliliter/liter, the hydrocarbon phenyl sulfonate that wetting agent is selected from sulfosuccinate, carbonatoms is 2 ~ 20, carbonatoms be 2 ~ 20 alkyl-sulphate and carbonatoms be one or more in the sulfated alkyl ether of 2 ~ 20; The content of described complexing agent is 0.1 ~ 5 milliliter/liter, and complexing agent is selected from one or more in formate, acetate, oxalate, succinate, tartrate, Citrate trianion and glycollate.
Publication number CN1880512A, denomination of invention " a kind of trivalent chromium electroplating solution in sulfate system and preparation method ", this electroplate liquid is made up of all by a certain percentage chromium sulphate, sodium sulfate, boric acid, Tai-Ace S 150, sodium lauryl sulphate, complexing agent and stablizer, and all the other are water.
Its weak point of above-mentioned patent: one what be that conducting salt adopts is the sodium sulfate of poor electric conductivity, directly has influence on the electroconductibility of tank liquor; Two is because Tai-Ace S 150 belongs to amphoteric metal, therefore poor to coating corrosion-resistant, directly has influence on the stability of tank liquor; Three be formic acid, acetic acid and oxalic acid to human body and bad environmental, produce methyl ether and ether.
Therefore, the electroplating solution of above-mentioned patent is unsuitable for the plating of window rail.
Summary of the invention
The object of the invention is to the blending process proposing a kind of window rail plating trivalent chromium bath, solution dispersibility prepared by this compound method is strong, covering power is good, the excellent anti-corrosion performance of the coating adopting this plating solution to prepare, life-time service does not come off, and attractive in appearance beautiful, be suitable for the plating of window rail.
For reaching this object, the present invention by the following technical solutions:
A kind of blending process of window rail plating trivalent chromium bath, consisting of of described electroplating solution: chromium sulphate 120-130g/L, boric acid 60-64g/L, ammonium sulfate 12-14g/L, potassium sulfate 82-84g/L, magnesium sulfate 28-32g/L, sodium formiate 0.006-0.008g/L, acetic acid 0.025-0.035g/L, tartrate 0.30-36g/L, glycerol 0.002-0.004g/L, second-ethylhexyl sulfate 0.003-0.006g/L, surplus is water; Described compound method comprises the steps:
(1) load the water of total amount half in coating bath, be heated to about 65-70 DEG C, then add chromium sulphate.
(2) boric acid, ammonium sulfate, potassium sulfate, magnesium sulfate successively, stirring and dissolving.
(3) adjust ph is 3.7-4.2; Temperature is kept to be 50-60 DEG C of standing 5-6 hour.
(4) sodium formiate, acetic acid, tartrate, glycerol is added successively, stirring and dissolving.
(5) add second-ethylhexyl sulfate, after dissolving, remaining water is added.
The present invention, by the adjustment to plating solution composition, does not adopt fluorochemical, avoids the pollution of fluorine, avoid other defect of prior art simultaneously.Solution composition of the present invention is simple, and raw material easily obtains, but by the allotment of component and the adjustment of content, makes each component play coordination technique effect, and finally make solution dispersibility strong, covering power is good, and cost is low, can be suitable for the plating of window rail.
The compound method step of plating solution of the present invention is the Optimization method of the design of components for this plating solution, adopt the preparation of substep, batch dissolution, control preparation temperature, time of repose particularly, if do not adopt the technique that " keeping temperature to be 50-60 DEG C of standing 5-6 hour " is such, affect greatly to the performance of plating solution, time serious, even do not realize the performance index of expecting.
Window rail of the present invention can adopt the former low-carbon steel material for iron skill.
The present invention has following beneficial effect:
1. after adopting the plating solution plating window rail of the inventive method preparation, covering power is good, antistripping ability is strong, corrosion resistance nature is high, be specially: as employing Hull slot standard sheet (3A × 5min, 50 DEG C) when carrying out detection plating solution performance, covering power (bright district walks) can reach more than 10.5cm; The expulsion rate tested by cross-cut tester is 0 substantially; SaltSprayTest erosion resistance is adopted to reach nondiscoloration in more than 300 hours.
2. adopt the cost of the window rail of the plating solution plating of the inventive method preparation suitable with conventional iron skill painting products, 30%-50% lower than the cost of stainless steel product.But it has the attractive appearance similar with stainless steel product and performance, its work-ing life extends 50% than iron art products.
Embodiment
Embodiment one
A kind of blending process of window rail plating trivalent chromium bath, consisting of of described electroplating solution: chromium sulphate 120g/L, boric acid 64g/L, ammonium sulfate 12g/L, potassium sulfate 84g/L, magnesium sulfate 28g/L, sodium formiate 0.008g/L, acetic acid 0.025g/L, tartrate 36g/L, glycerol 0.002g/L, second-ethylhexyl sulfate 0.006g/L, surplus is water; Described compound method comprises the steps:
(1) load the water of total amount half in coating bath, be heated to 65 DEG C, then add chromium sulphate;
(2) boric acid, ammonium sulfate, potassium sulfate, magnesium sulfate successively, stirring and dissolving;
(3) adjust ph is 3.7-4.2; Temperature is kept to be 50-60 DEG C of standing 5-6 hour;
(4) sodium formiate, acetic acid, tartrate, glycerol is added successively, stirring and dissolving;
(5) add second-ethylhexyl sulfate, after dissolving, remaining water is added.
Embodiment two
A kind of blending process of window rail plating trivalent chromium bath, consisting of of described electroplating solution: chromium sulphate 130g/L, boric acid 60g/L, ammonium sulfate 14g/L, potassium sulfate 82g/L, magnesium sulfate 32g/L, sodium formiate 0.006g/L, acetic acid 0.035g/L, tartrate 0.30g/L, glycerol 0.004g/L, second-ethylhexyl sulfate 0.003g/L, surplus is water; Described compound method comprises the steps:
(1) load the water of total amount half in coating bath, be heated to 70 DEG C, then add chromium sulphate;
(2) boric acid, ammonium sulfate, potassium sulfate, magnesium sulfate successively, stirring and dissolving;
(3) adjust ph is 3.7-4.2; Temperature is kept to be 50-60 DEG C of standing 5-6 hour;
(4) sodium formiate, acetic acid, tartrate, glycerol is added successively, stirring and dissolving;
(5) add second-ethylhexyl sulfate, after dissolving, remaining water is added.
Embodiment three
A kind of blending process of window rail plating trivalent chromium bath, consisting of of described electroplating solution: chromium sulphate 125g/L, boric acid 62g/L, ammonium sulfate 13g/L, potassium sulfate 83g/L, magnesium sulfate 30g/L, sodium formiate 0.007g/L, acetic acid 0.030g/L, tartrate 0.33g/L, glycerol 0.003g/L, second-ethylhexyl sulfate 0.0045g/L, surplus is water; Described compound method comprises the steps:
(1) load the water of total amount half in coating bath, be heated to 67 DEG C, then add chromium sulphate;
(2) boric acid, ammonium sulfate, potassium sulfate, magnesium sulfate successively, stirring and dissolving;
(3) adjust ph is 3.7-4.2; Temperature is kept to be 50-60 DEG C of standing 5-6 hour;
(4) sodium formiate, acetic acid, tartrate, glycerol is added successively, stirring and dissolving;
(5) add second-ethylhexyl sulfate, after dissolving, remaining water is added.
Applicant states, 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, namely 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, to equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (1)
1. the blending process of a window rail plating trivalent chromium bath, consisting of of described electroplating solution: chromium sulphate 120-130g/L, boric acid 60-64g/L, ammonium sulfate 12-14g/L, potassium sulfate 82-84g/L, magnesium sulfate 28-32g/L, sodium formiate 0.006-0.008g/L, acetic acid 0.025-0.035g/L, tartrate 0.30-36g/L, glycerol 0.002-0.004g/L, second-ethylhexyl sulfate 0.003-0.006g/L, surplus is water; Described compound method comprises the steps:
(1) load the water of total amount half in coating bath, be heated to about 65-70 DEG C, then add chromium sulphate;
(2) boric acid, ammonium sulfate, potassium sulfate, magnesium sulfate successively, stirring and dissolving;
(3) adjust ph is 3.7-4.2; Temperature is kept to be about 50-60 DEG C of standing 5-6 hour;
(4) sodium formiate, acetic acid, tartrate, glycerol is added successively, stirring and dissolving;
(5) add second-ethylhexyl sulfate, after dissolving, remaining water is added.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510848871.3A CN105274583A (en) | 2015-11-28 | 2015-11-28 | Preparing technique for trivalent chromium plating solution for electroplating window guard bars |
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| CN201510848871.3A CN105274583A (en) | 2015-11-28 | 2015-11-28 | Preparing technique for trivalent chromium plating solution for electroplating window guard bars |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220136121A1 (en) * | 2019-02-25 | 2022-05-05 | Tata Steel Ijmuiden B.V. | Method for manufacturing chromium oxide coated tinplate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880512A (en) * | 2006-05-11 | 2006-12-20 | 武汉大学 | Trivalent chromium electroplating solution in sulfate system and method for preparing same |
| CN101302633A (en) * | 2008-01-31 | 2008-11-12 | 顿力集团有限公司 | Trivalent chromium electroplating bath solution formula and bath forming method |
| CN103668345A (en) * | 2012-09-04 | 2014-03-26 | 无锡福镁轻合金科技有限公司 | Total-sulfate trivalent chromium plating solution |
| CN103806021A (en) * | 2012-11-12 | 2014-05-21 | 无锡三洲冷轧硅钢有限公司 | Preparation process of plating solution for chrome-faced cutter |
| CN104388989A (en) * | 2014-11-14 | 2015-03-04 | 无锡信大气象传感网科技有限公司 | Trivalent chromium electroplating liquid and preparation method thereof |
-
2015
- 2015-11-28 CN CN201510848871.3A patent/CN105274583A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880512A (en) * | 2006-05-11 | 2006-12-20 | 武汉大学 | Trivalent chromium electroplating solution in sulfate system and method for preparing same |
| CN101302633A (en) * | 2008-01-31 | 2008-11-12 | 顿力集团有限公司 | Trivalent chromium electroplating bath solution formula and bath forming method |
| CN103668345A (en) * | 2012-09-04 | 2014-03-26 | 无锡福镁轻合金科技有限公司 | Total-sulfate trivalent chromium plating solution |
| CN103806021A (en) * | 2012-11-12 | 2014-05-21 | 无锡三洲冷轧硅钢有限公司 | Preparation process of plating solution for chrome-faced cutter |
| CN104388989A (en) * | 2014-11-14 | 2015-03-04 | 无锡信大气象传感网科技有限公司 | Trivalent chromium electroplating liquid and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220136121A1 (en) * | 2019-02-25 | 2022-05-05 | Tata Steel Ijmuiden B.V. | Method for manufacturing chromium oxide coated tinplate |
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Application publication date: 20160127 |