CN110512240A - A kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent - Google Patents
A kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent Download PDFInfo
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- CN110512240A CN110512240A CN201910833793.8A CN201910833793A CN110512240A CN 110512240 A CN110512240 A CN 110512240A CN 201910833793 A CN201910833793 A CN 201910833793A CN 110512240 A CN110512240 A CN 110512240A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/06—Electroplating: Baths therefor from solutions of chromium from solutions of trivalent chromium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/10—Electroplating: Baths therefor from solutions of chromium characterised by the organic bath constituents used
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Abstract
The present invention relates to a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent, it is added in composition there are many organic composite complex and inorganic matter catalyst, enable to promote nucleus to generate or inhibit the growth of nucleus using the white chromium electrodeposit liquid of trivalent that formula and weight ratio of the invention are made, to reach refinement coating nucleus and finer and close metal chrome plating can be formed, and it can be carried out electrolytic passivation protection processing after plating, to realize the performance that can improve coating, use the white chromium electrodeposit liquid of trivalent made from formula and weight ratio of the invention can be with PVC, electroplating bath made of the materials such as ABS or polyethylene, and it puts it into electroplating bath using direct current as power supply and by graphite carbon slab as anode material, and the workpiece to need to carry out chromium plating process is cathode, it is electroplated under conditions of plating to workpiece, work after being plated The surface of part can deposit one layer of layers of chrome, which can not only improve the corrosion resistance of workpiece surface, can also replace hexavalent chromium plating.
Description
Technical field
The present invention relates to a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent.
Background technique
Chrome layer have good hardness, wearability, corrosion resistance and dicoration, it has also become most widely used plating it
One.Traditional hexavalent chromium solution causes serious pollution to the environment, and national governments are all reinforcing legislation management, will be phased out.For this purpose, grinding
Issue environmental protection, can replace hexavalent chromium plating trivalent chromium plating scheme be imperative.
Current trivalent chromium plating solution due to it is higher than Cr VI by such as use cost, be not easy to plate it is thick, coating corrosion-resistant
Property it is poor compared with Cr VI and delay the limitation for replacing the various defects such as hexavalent chromium plating, cause it to be difficult to promote the use of.And sulphur
The corrosion resistance of acid type trivalent chromium is better than salt acid type trivalent chromium, and if notification number is CN108034969A, patent name is a kind of " sulphur
Hydrochlorate trivalent chromium chrome plating electroplate liquid and its application method ", but the sulfate trivalent chromium chromium plating plating made using the formula
Liquid has the deficiencies of anode is expensive, operating condition is more harsh and production cost is higher.Though and the cost of salt acid type trivalent chromium compared with
It is low, but its corrosion resistance is again poor, and the development of current trivalent chromium plating chromium process is made to have fallen into stagnation.For this purpose, applicant
Once had developed a kind of patent name be " a kind of trivalent chromium sulfate plating solution and its manufacture craft and electroplating technology ", the patent No.
For the Chinese invention patent of " 201910037607.X ", although the problem of can solve operating condition harshness and high production cost,
But the coating deposition rate of its electroplate liquid is only in 0.1-0.2 [mu, covering power be less than 8.5cm, electricity
The coating deposition rate and covering power of plating solution also can be further improved.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent, pass through
Addition makes there are many organic composite complex and inorganic matter catalyst using formula and weight ratio system of the invention in composition
Making the white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent come out has deposition faster with more preferably corrosion resistance, coating
The thickness of speed and coating more thickeies, corrosion resistance reached 9 grades, the deposition velocity of coating 0.3 [mu with
On, the thickness of coating has reached 9cm or more, and its whole composition does not contain Cr VI, not only efficiently solves tradition
Cr VI have the problem of pollution to environment, also make the deposition speed of the corrosion resistance of current sulfuric acid type trivalent chromium, coating
The thickness of degree and coating has obtained significant raising.The present invention is achieved through the following technical solutions:
A kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent comprising following weight ratio composition:
Cylinder salt 40-50% is opened,
Chromic salts 5-20%,
Stabilizer 10-20%,
Complexing agent 0.005-0.015%,
Wetting agent 0.2-0.6%,
Regulator 2-3%,
Remaining is pure water.
The cylinder salt of opening includes the mixing of chromium chloride and one or both of chromium sulfate that weight ratio is 5-20%, weight
Than the potassium chloride for 20-50%, weight ratio be 5-20% ammonium chloride, weight ratio be 1-10% sodium sulphate and weight ratio be 10-
30% boric acid, it is used when opening cylinder salt to slot, it is used to supplement the metal chromium ions of part consumption, to improve the ratio of electroplate liquid
Weight and boric acid, maintain the conductive capability of electroplate liquid, and can improve the deposition velocity of coating, make the deposition velocity of the coating of this product
Reach 0.3 [mu or more, to break the coating deposition rate of current sulfuric acid type trivalent chromium only at micro- m/min of 0.1-0.2
Clock.
Further, the chromic salts is main salt, and chromic salts includes the mixing of one or both of chromium chloride and chromium sulfate, chromium
Salt is for supplementing chromium ion consumed by electroplate liquid.
Further, the stabilizer is the complexing agent of chromic salt, is used to form stable complex compound with trivalent chromium,
And chromium ion is promoted to be precipitated in cathode surface, it is the mixture of carboxylic acid composition；The stabilizer include formic acid, acetic acid, oxalic acid,
In hydroxyacetic acid, lactic acid, malic acid, tartaric acid, malonic acid, amion acetic acid and nitrilotriacetic acid any two or it is any three kinds with
Upper mixing.It, and will be with a variety of organic composites by the way that stabilizer to be mixed using a variety of organic composite complexs
The stabilizer and other component combines of the invention that object is mixed use, and achieve the generation that can promote nucleus, to be formed
Finer and close metal chrome plating, to improve the corrosion resistance of chrome plating.
Further, the complexing agent is ferric iron compound, ferric iron compound iron ion in trivalent chromium plating solution
Presence chromium ion can be promoted to reach the covering power of this product in the precipitation of cathode to improve the covering power of chromium
9cm or more, to solve the covering power of current sulfuric acid type trivalent chromium in 8.5cm or less.
Further, the wetting agent include weight ratio be 1-10% sodium alkyl sulfonate and sulfosuccinic acid ester sodium salt it
Mixing, remaining is pure water；The wetting agent removes workpiece surface point and pin hole etc. for reducing the tension on electroplate liquid surface.
Further, the regulator include weight ratio be 40-60% inorganic matter catalyst and organic composite complex it
Mixing, remaining is pure water, and regulator is mixed by using a variety of organic composite complexs, inorganic matter catalyst and pure water,
And by the regulator being mixed by a variety of organic composite complexs, inorganic matter catalyst and pure water with it is of the invention other
Component combine uses, and achieves the generation that can promote nucleus, to reach refinement coating nucleus, can form finer and close gold
Belong to chrome plating, to realize the corrosion resistance that can improve chrome plating, and the corrosion resistance of workpiece is made to have reached 9 grades, to solve
Only up to 2 grades of corrosion resistance highest of current sulfuric acid type trivalent chromium.
Further, the organic composite complex includes lactic acid, malic acid, tartaric acid, malonic acid, amion acetic acid and ammonia
Two kinds or three kinds or more of mixing in triacetic acid, the inorganic matter catalyst are lanthanide series in rare earth element, rare earth element
Middle lanthanide series includes two kinds or three in lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium
Kind or more mixing.
A kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent of the invention, including open cylinder salt, chromic salts, stabilizer, network
Mixture, wetting agent, regulator and remaining be pure water, by by stabilizer use formic acid, acetic acid, oxalic acid, hydroxyacetic acid, cream
The mixing of any two or any three kinds or more in acid, malic acid, tartaric acid, malonic acid, amion acetic acid and nitrilotriacetic acid is made
For organic composite complex, and by regulator using inorganic matter catalyst and organic composite complex mix and water mixes system
At, and inorganic matter catalyst is using lanthanide series in rare earth element, in rare earth element lanthanide series include lanthanum, cerium, praseodymium, neodymium, promethium,
The mixing of any two or any three kinds or more in samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium, and regulator
In organic composite complex include in lactic acid, malic acid, tartaric acid, malonic acid, amion acetic acid and nitrilotriacetic acid any two
Kind or any three kinds above mixing, by adding in composition, there are many organic composite complexs and inorganic matter catalysis
Agent enables to promote crystalline substance using the white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent that formula and weight ratio of the invention are made
Karyogenesis to reach refinement coating nucleus and can form finer and close metal chrome plating, and can be carried out electrolytic passivation after plating
Protection processing, thus realize the performance that can further improve coating, it is white using trivalent made from formula and weight ratio of the invention
Chromium electrodeposit liquid can be with electroplating bath made of the materials such as PVC, ABS or polyethylene, and puts using direct current as power supply and by graphite carbon slab
Enter in electroplating bath keeps it right under conditions of plating as anode material, and the workpiece to need to carry out chromium plating process as cathode
Workpiece is electroplated, and the surface (i.e. the surface of cathode) of the workpiece after being plated can deposit one layer of layers of chrome, which can not only mention
The corrosion resistance of high workpiece surface, and it is free of Cr VI, and can replace hexavalent chromium plating, is produced into realize and can reduce
This, and its no pollution to the environment, use is very environmentally friendly, in addition, after being carried out continuously test in 80 hours to this layers of chrome using CASS method,
The appearance of the coating can reach 9 grades, i.e. its realization can be suitably used on automobile fitting inner and outer decorative parts, sanitaryware etc., be applicable in model
It encloses extensively, convenient for being widely used to promote.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1:
A kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent comprising following weight ratio composition:
Cylinder salt 42% is opened,
Chromic salts 8%,
Stabilizer 13%,
Complexing agent 0.01%,
Wetting agent 0.4%,
Regulator 2.5%,
Remaining is pure water.
It is described open cylinder salt include weight ratio be 18% chromium chloride, weight ratio be 32% potassium chloride, weight ratio be 16% chlorine
Change ammonium, the sodium sulphate that weight ratio is 8% and the boric acid that weight ratio is 26%, it is used when opening cylinder salt to slot, it is used to supplement part
The metal chromium ions of consumption maintain the conductive capability of electroplate liquid to improve the specific gravity and boric acid of electroplate liquid.
In one embodiment, the chromic salts is main salt, and chromic salts is chromium chloride, and chromic salts is consumed for supplementing electroplate liquid
Chromium ion.
In one embodiment, the stabilizer is the complexing agent of chromic salt, is used to form stabilization with trivalent chromium
Complex compound, and promote chromium ion cathode surface be precipitated, be carboxylic acid composition mixture；The stabilizer is oxalic acid, hydroxyl
The mixing of guanidine-acetic acid, lactic acid, malonic acid, amion acetic acid and nitrilotriacetic acid.
In one embodiment, the complexing agent is ferric iron compound, and ferric iron compound is in trivalent chromium plating solution
The presence of middle iron ion can promote chromium ion in the precipitation of cathode, to improve the covering power of chromium.
In one embodiment, the wetting agent includes the sodium alkyl sulfonate that weight ratio is 3% and the sulphur that weight ratio is 6%
The mixing of base succinate sodium salt, remaining is pure water；The wetting agent removes workpiece table for reducing the tension on electroplate liquid surface
Face point and pin hole etc..
In one embodiment, the regulator includes that the inorganic matter catalyst that weight ratio is 50% is matched with organic composite
The mixing of object is closed, remaining is pure water, and regulator is used to that nucleus to be promoted to generate or inhibit the growth of nucleus, to reach refinement plating layer crystal
Core can form finer and close metal chrome plating, to realize the corrosion resistance that can improve chrome plating.
In one embodiment, the organic composite complex includes lactic acid, malonic acid, amion acetic acid and nitrilotriacetic acid
Mixing, the inorganic matter catalyst is lanthanide series in rare earth element, in rare earth element lanthanide series include lanthanum, cerium, praseodymium,
The mixing of the elements such as neodymium, promethium and samarium.
Embodiment 2:
A kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent comprising following weight ratio composition:
Cylinder salt 49% is opened,
Chromic salts 19%,
Stabilizer 18%,
Complexing agent 0.0013%,
Wetting agent 0.5%,
Regulator 3%,
Remaining is pure water.
It is described open cylinder salt include weight ratio be 11% chromium sulfate, weight ratio be 47% potassium chloride, weight ratio be 13% chlorine
Change ammonium, the sodium sulphate that weight ratio is 7% and the boric acid that weight ratio is 22%, it is used when opening cylinder salt to slot, it is used to supplement part
The metal chromium ions of consumption maintain the conductive capability of electroplate liquid to improve the specific gravity and boric acid of electroplate liquid.
In one embodiment, the chromic salts is main salt, and chromic salts is chromium chloride, and chromic salts is consumed for supplementing electroplate liquid
Chromium ion.
In one embodiment, the stabilizer is the complexing agent of chromic salt, is used to form stabilization with trivalent chromium
Complex compound, and promote chromium ion cathode surface be precipitated, be carboxylic acid composition mixture；The stabilizer is formic acid, second
The mixing of acid, lactic acid, malic acid and nitrilotriacetic acid.
In one embodiment, the complexing agent is ferric iron compound, and ferric iron compound is in trivalent chromium plating solution
The presence of middle iron ion can promote chromium ion in the precipitation of cathode, to improve the covering power of chromium.
In one embodiment, the wetting agent includes the sodium alkyl sulfonate that weight ratio is 9% and the sulphur that weight ratio is 1%
The mixing of base succinate sodium salt, remaining is pure water；The wetting agent removes workpiece table for reducing the tension on electroplate liquid surface
Face point and pin hole etc..
In one embodiment, the regulator includes that the inorganic matter catalyst that weight ratio is 44% is matched with organic composite
The mixing of object is closed, remaining is pure water, and regulator is used to that nucleus to be promoted to generate or inhibit the growth of nucleus, to reach refinement plating layer crystal
Core can form finer and close metal chrome plating, to realize the corrosion resistance that can improve chrome plating.
In one embodiment, the organic composite complex includes that lactic acid, malic acid, tartaric acid and malonic acid are mixed
It closes, the inorganic matter catalyst is lanthanide series in rare earth element, and lanthanide series includes dysprosium, holmium, erbium, thulium, ytterbium in rare earth element
With the mixing of the elements such as lutetium.
Embodiment 3:
A kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent comprising following weight ratio composition:
Cylinder salt 45% is opened,
Chromic salts 13%,
Stabilizer 15%,
Complexing agent 0.008%,
Wetting agent 0.3%,
Regulator 2%,
Remaining is pure water.
It is described open cylinder salt include the chromium chloride that weight ratio is 6% and the potassium chloride that the mixing of 9% chromium sulfate, weight ratio are 45%,
The boric acid that the sodium sulphate and weight ratio that ammonium chloride that weight ratio is 17%, weight ratio are 9% are 14%, it is used when opening cylinder salt as fluting,
Its metal chromium ions for being used to supplement part consumption maintains the conductive capability of electroplate liquid to improve the specific gravity and boric acid of electroplate liquid.
In one embodiment, the chromic salts is main salt, and chromic salts is mixing for chromium chloride and chromium sulfate, and chromic salts is used to mend
Charge chromium ion consumed by plating solution.
In one embodiment, the stabilizer is the complexing agent of chromic salt, is used to form stabilization with trivalent chromium
Complex compound, and promote chromium ion cathode surface be precipitated, be carboxylic acid composition mixture；The stabilizer is lactic acid, wine
The mixing of stone acid and nitrilotriacetic acid.
In one embodiment, the complexing agent is ferric iron compound, and ferric iron compound is in trivalent chromium plating solution
The presence of middle iron ion can promote chromium ion in the precipitation of cathode, to improve the covering power of chromium.
In one embodiment, the wetting agent includes the sodium alkyl sulfonate that weight ratio is 3% and the sulphur that weight ratio is 6%
The mixing of base succinate sodium salt, remaining is pure water；The wetting agent removes workpiece table for reducing the tension on electroplate liquid surface
Face point and pin hole etc..
In one embodiment, the regulator includes that the inorganic matter catalyst that weight ratio is 58% is matched with organic composite
The mixing of object is closed, remaining is pure water, and regulator is used to that nucleus to be promoted to generate or inhibit the growth of nucleus, to reach refinement plating layer crystal
Core can form finer and close metal chrome plating, to realize the corrosion resistance that can improve chrome plating.
In one embodiment, the organic composite complex includes the mixing of malic acid and tartaric acid, described inorganic
Object catalyst is lanthanide series in rare earth element, and lanthanide series includes promethium, samarium, europium, gadolinium, terbium, dysprosium, scandium and yttrium etc. in rare earth element
The mixing of element.
The electroplating principle of the white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent are as follows: it is steady by being added into component
Determine agent and regulator, stabilizer using organic composite complex, and regulator using inorganic matter catalyst with it is organic
The mixing of compound complex and water are mixed, and by adding in composition, there are many organic composite complex and inorganic matters
Catalyst is the process for plating one layer of other metal or alloy on the metal surface of workpiece using electrolysis principle, i.e., it is logical
Crossing electrolysis can make to adhere to one layer of fine and close passivation protection layer on the surface of metal or other materials product, make using the present invention
Formula and the white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent made of weight ratio by promoting nucleus to generate or inhibit
The growth of nucleus reaches refinement coating nucleus and can form finer and close metal chrome plating, which can be by work
The surface of part keeps apart with extraneous corrosive environment, so that playing prevents metal oxidation (as corroded), and then can improve the resistance to of its
The effects of mill property, electric conductivity, reflective, corrosion resistance and having improved aesthetic appearance；When workpiece plating when, with coated metal or its
As anode, workpiece to be electroplated makes the cation dissociation of coated metal to workpiece to be plated as cathode for his insoluble material
It can be formed coating when surface, to realize the interference that can exclude other cations, and can ensure that the coating of workpiece surface is uniform
It is secured with coating.
The white chromium plating bath of trivalent that will be made using the formula and weight ratio of embodiment 1, embodiment 2 and embodiment 3
Plating test is carried out to workpiece respectively with current sulfuric acid type trivalent chromium, properties correlation data be as follows:
As can be known from the above table, the white chromium plating bath of trivalent made using formula and weight ratio of the invention passes through the side CASS
Method test, corrosion resistance reached 9 grades, compared with the corrosion resistance of current sulfuric acid type trivalent chromium only reaches 2 grades
Compared with, corrosion resistance obtained significant raising, and its coating deposition rate is or even to reach greater than 0.3 [mu
To 0.5 [mu, with the coating deposition rate of current sulfuric acid type trivalent chromium only in 0.1-0.2 [mu compared with
Compared with which raises the deposition velocities of coating, and then greatly improve the efficiency of its plating；And its thickness of coating realization can be micro- 4
Meter or more and cladding thickness reached 9cm or more, with the thickness of coating of current sulfuric acid type trivalent chromium only at 0.5-3 microns and
Cladding thickness is to compare less than 8.5cm, and thickness of coating of the invention and cladding thickness are significantly improved, in addition, its
Whole component, which is realized, efficiently solves the problems, such as that traditional Cr VI has pollution to environment without containing Cr VI, and
Its use cost is lower than Cr VI, and use is more safe and environment-friendly.
The present invention is not limited to above-mentioned preferred forms, anyone obtain under the inspiration of the present invention other it is any with
The identical or similar product of the present invention, is within the scope of the present invention.
Claims (7)
1. a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent, it is characterised in that: it includes following weight ratio composition:
Cylinder salt 40-50% is opened,
Chromic salts 5-20%,
Stabilizer 10-20%,
Complexing agent 0.005-0.015%,
Wetting agent 0.2-0.6%,
Regulator 2-3%,
Remaining is pure water,
The cylinder salt of opening includes that the mixing of chromium chloride and one or both of chromium sulfate that weight ratio is 5-20%, weight ratio are
The sodium sulphate and weight ratio that ammonium chloride that the potassium chloride of 20-50%, weight ratio are 5-20%, weight ratio are 1-10% are 10-30%'s
Boric acid, it is used when opening cylinder salt to slot, it is used to supplement the metal chromium ions of part consumption, to improve the specific gravity and boron of electroplate liquid
Acid maintains the conductive capability of electroplate liquid.
2. a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent according to claim 1, it is characterised in that: the chromium
Salt is main salt, and chromic salts includes the mixing of one or both of chromium chloride and chromium sulfate, and chromic salts is consumed for supplementing electroplate liquid
Chromium ion.
3. a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent according to claim 1, it is characterised in that: described steady
Determine the complexing agent that agent is chromic salt, is used to form stable complex compound with trivalent chromium, and promote chromium ion in cathode surface
It is precipitated, is the mixture of carboxylic acid composition again；The stabilizer includes formic acid, acetic acid, oxalic acid, hydroxyacetic acid, lactic acid, apple
The mixing of any two or any three kinds or more in acid, tartaric acid, malonic acid, amion acetic acid and nitrilotriacetic acid.
4. a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent according to claim 1, it is characterised in that: the network
Mixture is ferric iron compound, and the presence of ferric iron compound iron ion in trivalent chromium plating solution can promote chromium ion in yin
The precipitation of pole, to improve the covering power of chromium.
5. a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent according to claim 1, it is characterised in that: described wet
It is the sodium alkyl sulfonate of 1-10% and mixing for sulfosuccinic acid ester sodium salt that profit agent, which includes weight ratio, remaining is pure water；It is described wet
Agent removes workpiece surface point and pin hole for reducing the tension on electroplate liquid surface.
6. a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent according to claim 1, it is characterised in that: the tune
Whole dose includes that weight ratio is the inorganic matter catalyst of 40-60% and mixing for organic composite complex, remaining is pure water, regulator
For promoting nucleus to generate, to reach refinement coating nucleus, finer and close metal chrome plating can be formed, so that realizing can mention
The corrosion resistance of high chrome plating.
7. a kind of white chromium electrodeposit liquid of salt acid type highly corrosion resistant trivalent according to claim 6, it is characterised in that: described to have
Machine compound complex include two kinds or three kinds in lactic acid, malic acid, tartaric acid, malonic acid, amion acetic acid and nitrilotriacetic acid with
Upper mixing, the inorganic matter catalyst are lanthanide series in rare earth element, in rare earth element lanthanide series include lanthanum, cerium, praseodymium,
Two kinds or three kinds or more of mixing in neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium.
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| CN110446802A (en) * | 2017-04-04 | 2019-11-12 | 安美特德国有限公司 | The method of electrolytic deposition chromium or chromium alloy layer at least one substrate |
| CN110446802B (en) * | 2017-04-04 | 2023-02-28 | 安美特德国有限公司 | Method for the electrolytic deposition of a chromium or chromium alloy layer on at least one substrate |
| CN111206270A (en) * | 2020-03-06 | 2020-05-29 | 广州三孚新材料科技股份有限公司 | Trivalent chromium electroplating solution and preparation method thereof |
| CN111206270B (en) * | 2020-03-06 | 2021-02-23 | 广州三孚新材料科技股份有限公司 | Trivalent chromium electroplating solution and preparation method thereof |
| WO2022224901A1 (en) * | 2021-04-21 | 2022-10-27 | 株式会社Jcu | Trivalent chromium plating solution and chromium plating method using same |
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