CN107761142A - A kind of method of eutectic solvent Electrodeposition Bath of Iron evanohm coating - Google Patents
A kind of method of eutectic solvent Electrodeposition Bath of Iron evanohm coating Download PDFInfo
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- CN107761142A CN107761142A CN201711101672.1A CN201711101672A CN107761142A CN 107761142 A CN107761142 A CN 107761142A CN 201711101672 A CN201711101672 A CN 201711101672A CN 107761142 A CN107761142 A CN 107761142A
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- eutectic solvent
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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
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
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Abstract
本发明涉及一种低共熔溶剂电沉积铁铬合金镀层的方法，属于表面工程和表面处理技术领域。在惰气环境下，首先将季铵盐与多元醇混合均匀后形成低共熔溶剂，然后向低共熔溶剂中加入四水合氯化亚铁和六水合氯化铬，制备得到低共熔溶剂电解液；以铬片为阳极，预处理后的基体为阴极，在控制电解液温度为35~75℃、槽电压为1.8~2.8V、阳极与阴极距离为0.6~2.4cm的条件下，在制备得到的低共熔溶剂电解液中电沉积0.5~5h，将电积后的阴极基体经丙酮、蒸馏水冲洗，干燥后即能在阴极基体上得到铁铬合金镀层。本发明旨在解决现有镀铬工艺中存在的电流效率低，难以实现清洁生产等问题。
The invention relates to a method for electrodepositing an iron-chromium alloy coating with a deep eutectic solvent, and belongs to the technical field of surface engineering and surface treatment. Under an inert gas environment, firstly mix the quaternary ammonium salt and the polyol evenly to form a deep eutectic solvent, then add ferrous chloride tetrahydrate and chromium chloride hexahydrate to the deep eutectic solvent to prepare a deep eutectic solvent Electrolyte: with chromium sheet as the anode and the pretreated substrate as the cathode, the temperature of the electrolyte is controlled at 35-75°C, the cell voltage is 1.8-2.8V, and the distance between the anode and the cathode is 0.6-2.4cm. The prepared deep eutectic solvent electrolyte is electrodeposited for 0.5~5h, the electrodeposited cathode substrate is rinsed with acetone and distilled water, and after drying, an iron-chromium alloy coating can be obtained on the cathode substrate. The invention aims to solve the problems of low current efficiency, difficulty in realizing clean production and the like existing in the existing chromium plating process.
Description
Technical field
The present invention relates to a kind of method of eutectic solvent Electrodeposition Bath of Iron evanohm coating, belong at Surface Engineering and surface
Manage technical field.
Background technology
Siderochrome coating has many advantages, such as bright property is good, hardness is high, anti-tarnishing ability is strong, wearability is good, and has
Very excellent corrosion stability and coating.Siderochrome coating in atmospheric conditions, the original gloss of holding that can be permanent, in acid, alkali
In there is higher chemical stability, it is all satisfactory in terms of ornamental and feature.Most common industrial work is used at present
Skill is chromium plating, but chrome plating meeting abrupt oxidization, and the cathode efficiency of chromium plating is extremely low, while has hydrogen in electroplating process
Air elutriation goes out, and this will cause substantial amounts of acid mist to produce, and the health of environment and worker are damaged.Therefore, it is necessary to study just
A kind of technique is simple, save, cost is low and environment amenable new method, enables chromium and its alloy layer in more fields
It is applied.
Eutectic solvent is typically the quaternary ammonium salt and hydrogen-bond donor by certain stoichiometric proportion（Such as acid amides, carboxylic acid and polynary
The compounds such as alcohol）The eutectic mixture combined.Eutectic solvent has wide electrochemical window, dissolubility and electric conductivity
Good, steam forces down and the advantages that good physical and chemical stability, is a kind of new green solvent.In electrodeposit metals side
Face, because eutectic solvent is capable of the dissolving metal oxide of selectivity, and with good electric conductivity and relatively negative reduction electricity
Gesture, i.e. electrodepositable obtains most of metals that can be obtained in aqueous at room temperature, and without side reaction, it is golden because obtained from
It is good to belong to quality, current efficiency is high.Further, since the preparation process of eutectic solvent is simple, low in raw material price, electricity is made
The brand-new electrolyte of siderochrome research is deposited, is had broad application prospects in non-ferrous metallurgy technology field.
The content of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides a kind of eutectic solvent electro-deposition siderochrome and closed
The method of gold plate.Present invention seek to address that current efficiency present in existing chrome-plated process is low, it is difficult to realizes clean manufacturing etc.
Problem, using eutectic solvent to Iron dichloride tetrahydrate and the favorable solubility of Hexaaquachromium chloride, using green
Eutectic solvent Electrodeposition Bath of Iron evanohm coating.The present invention is achieved through the following technical solutions.
A kind of method of eutectic solvent Electrodeposition Bath of Iron evanohm coating, it is comprised the following steps that：
（1）According to mol ratio it is 2 ~ 4 first by quaternary ammonium salt and polyalcohol under inert-gas environment：1 ~ 2 it is well mixed after formed it is low common
Molten solvent, Iron dichloride tetrahydrate and Hexaaquachromium chloride then are added into the eutectic solvent that temperature is 20 ~ 80 DEG C, is prepared
Obtain eutectic solvent electrolyte；
（2）Using chromium piece as anode, pretreated matrix is negative electrode, is for 35 ~ 75 DEG C, tank voltage controlling electrolyte temperature
Under conditions of 1.8 ~ 2.8V, anode and cathode distance are 0.6 ~ 2.4cm, in step（1）The eutectic solvent electrolysis being prepared
0.5 ~ 5h of electro-deposition in liquid, by the cathode base after electrodeposition through acetone, distilled water flushing, it can be obtained after drying on cathode base
To ferrochrome coating.
The step（1）Middle quaternary ammonium salt is Choline Chloride, benzyltriethylammonium chloride or hydrogen sulfate tetrabutylammonium.
The step（1）Middle polyalcohol is ethylene glycol, glycerine or mannitol.
The step（1）Middle Iron dichloride tetrahydrate and Hexaaquachromium chloride mol ratio is 1 ~ 2：5~20.
The step（2）Middle matrix is copper sheet, stainless steel or zinc metal sheet.
The beneficial effects of the invention are as follows：The ferrochrome coating that can be prepared using this method is bright fine and close smooth, with
Matrix binding ability is strong, wearability and excellent corrosion resistance, avoids the harm of Cr VI and plating solution, environment-friendly.
Brief description of the drawings
Fig. 1 is the ferrochrome coating XRD that the embodiment of the present invention 1 is prepared；
Fig. 2 is the ferrochrome coating SEM figures that the embodiment of the present invention 1 is prepared.
Embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
The method of the eutectic solvent Electrodeposition Bath of Iron evanohm coating, it is comprised the following steps that：
（1）According to mol ratio it is 2 first by quaternary ammonium salt and polyalcohol under inert-gas environment：1 it is well mixed after to form eutectic molten
Agent, Iron dichloride tetrahydrate and Hexaaquachromium chloride then are added into the eutectic solvent that temperature is 20 DEG C, is prepared low
Congruent melting dissolvent electrolytic solution；Wherein quaternary ammonium salt is Choline Chloride, and polyalcohol is ethylene glycol, Iron dichloride tetrahydrate and six chloride hydrates
The mol ratio of chromium is 1：5；
（2）Using chromium piece as anode, pretreated matrix is negative electrode, to control electrolyte temperature be 35 DEG C, tank voltage 1.8V,
Under conditions of anode and cathode distance are 0.6cm, in step（1）Electro-deposition in the eutectic solvent electrolyte being prepared
0.5h, by the cathode base after electrodeposition through acetone, distilled water flushing, ferrochrome plating can be obtained after drying on cathode base
Layer, wherein matrix is copper sheet.
The ferrochrome coating XRD that the present embodiment is prepared is as shown in figure 1, SEM figures are as shown in Figure 2.Can from Fig. 2
It is strong with matrix binding ability to find out that ferrochrome plated layer compact is smooth.
Embodiment 2
The method of the eutectic solvent Electrodeposition Bath of Iron evanohm coating, it is comprised the following steps that：
（1）According to mol ratio it is 4 first by quaternary ammonium salt and polyalcohol under inert-gas environment：1 it is well mixed after to form eutectic molten
Agent, Iron dichloride tetrahydrate and Hexaaquachromium chloride then are added into the eutectic solvent that temperature is 50 DEG C, is prepared low
Congruent melting dissolvent electrolytic solution；Wherein quaternary ammonium salt is benzyltriethylammonium chloride, and polyalcohol is glycerine, Iron dichloride tetrahydrate and six
The mol ratio of chloride hydrate chromium is 2：5；
（2）Using chromium piece as anode, pretreated matrix is negative electrode, to control electrolyte temperature be 60 DEG C, tank voltage 2.3V,
Under conditions of anode and cathode distance are 1.0cm, in step（1）Electro-deposition 2h in the eutectic solvent electrolyte being prepared,
By the cathode base after electrodeposition through acetone, distilled water flushing, ferrochrome coating can be obtained on cathode base after drying, its
Middle matrix is stainless steel.
Embodiment 3
The method of the eutectic solvent Electrodeposition Bath of Iron evanohm coating, it is comprised the following steps that：
（1）According to mol ratio it is 3 first by quaternary ammonium salt and polyalcohol under inert-gas environment：2 it is well mixed after to form eutectic molten
Agent, Iron dichloride tetrahydrate and Hexaaquachromium chloride then are added into the eutectic solvent that temperature is 80 DEG C, is prepared low
Congruent melting dissolvent electrolytic solution；Wherein quaternary ammonium salt is hydrogen sulfate tetrabutylammonium, and polyalcohol is mannitol, Iron dichloride tetrahydrate and six water
The mol ratio for closing chromium chloride is 1：20；
（2）Using chromium piece as anode, pretreated matrix is negative electrode, to control electrolyte temperature be 75 DEG C, tank voltage 2.8V,
Under conditions of anode and cathode distance are 2.4cm, in step（1）Electro-deposition 5h in the eutectic solvent electrolyte being prepared,
By the cathode base after electrodeposition through acetone, distilled water flushing, ferrochrome coating can be obtained on cathode base after drying, its
Middle matrix is zinc metal sheet.
Embodiment 4
The method of the eutectic solvent Electrodeposition Bath of Iron evanohm coating, it is comprised the following steps that：
（1）According to mol ratio it is 3 first by quaternary ammonium salt and polyalcohol under inert-gas environment：1.5 it is well mixed after form eutectic
Solvent, Iron dichloride tetrahydrate and Hexaaquachromium chloride then are added into the eutectic solvent that temperature is 70 DEG C, is prepared
Eutectic solvent electrolyte；Wherein quaternary ammonium salt is hydrogen sulfate tetrabutylammonium, and polyalcohol is mannitol, Iron dichloride tetrahydrate and six
The mol ratio of chloride hydrate chromium is 1：16；
（2）Using chromium piece as anode, pretreated matrix is negative electrode, to control electrolyte temperature be 60 DEG C, tank voltage 2.4V,
Under conditions of anode and cathode distance are 1.2cm, in step（1）Electro-deposition 4h in the eutectic solvent electrolyte being prepared,
By the cathode base after electrodeposition through acetone, distilled water flushing, ferrochrome coating can be obtained on cathode base after drying, its
Middle matrix is zinc metal sheet.
Above in association with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put that various changes can be made.
Claims (5)
- A kind of 1. method of eutectic solvent Electrodeposition Bath of Iron evanohm coating, it is characterised in that comprise the following steps that：（1）According to mol ratio it is 2 ~ 4 first by quaternary ammonium salt and polyalcohol under inert-gas environment：1 ~ 2 it is well mixed after formed it is low common Molten solvent, Iron dichloride tetrahydrate and Hexaaquachromium chloride then are added into the eutectic solvent that temperature is 20 ~ 80 DEG C, is prepared Obtain eutectic solvent electrolyte；（2）Using chromium piece as anode, pretreated matrix is negative electrode, is for 35 ~ 75 DEG C, tank voltage controlling electrolyte temperature Under conditions of 1.8 ~ 2.8V, anode and cathode distance are 0.6 ~ 2.4cm, in step（1）The eutectic solvent electrolysis being prepared 0.5 ~ 5h of electro-deposition in liquid, by the cathode base after electrodeposition through acetone, distilled water flushing, it can be obtained after drying on cathode base To ferrochrome coating.
- 2. the method for eutectic solvent Electrodeposition Bath of Iron evanohm coating according to claim 1, it is characterised in that：The step Suddenly（1）Middle quaternary ammonium salt is Choline Chloride, benzyltriethylammonium chloride or hydrogen sulfate tetrabutylammonium.
- 3. the method for eutectic solvent Electrodeposition Bath of Iron evanohm coating according to claim 1, it is characterised in that：The step Suddenly（1）Middle polyalcohol is ethylene glycol, glycerine or mannitol.
- 4. the method for eutectic solvent Electrodeposition Bath of Iron evanohm coating according to claim 1, it is characterised in that：The step Suddenly（1）Middle Iron dichloride tetrahydrate and Hexaaquachromium chloride mol ratio is 1 ~ 2：5~20.
- 5. the method for eutectic solvent Electrodeposition Bath of Iron evanohm coating according to claim 1, it is characterised in that：The step Suddenly（2）Middle matrix is copper sheet, stainless steel or zinc metal sheet.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108707936A (en) * | 2018-06-28 | 2018-10-26 | 南京信息工程大学 | The method that choline chloride-glycerine system electrochemistry prepares metal spelter coating |
| CN108754557A (en) * | 2018-06-28 | 2018-11-06 | 南京信息工程大学 | The method that high current density electrochemistry prepares spelter coating in ionic liquid |
| CN108842172A (en) * | 2018-06-15 | 2018-11-20 | 昆明理工大学 | A kind of method that eutectic solvent electro-deposition prepares stainless steel coating |
| CN114059117A (en) * | 2021-10-26 | 2022-02-18 | 浙江大学杭州国际科创中心 | Preparation method and application of ionic liquid chromium electroplating solution |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108842172A (en) * | 2018-06-15 | 2018-11-20 | 昆明理工大学 | A kind of method that eutectic solvent electro-deposition prepares stainless steel coating |
| CN108707936A (en) * | 2018-06-28 | 2018-10-26 | 南京信息工程大学 | The method that choline chloride-glycerine system electrochemistry prepares metal spelter coating |
| CN108754557A (en) * | 2018-06-28 | 2018-11-06 | 南京信息工程大学 | The method that high current density electrochemistry prepares spelter coating in ionic liquid |
| CN114059117A (en) * | 2021-10-26 | 2022-02-18 | 浙江大学杭州国际科创中心 | Preparation method and application of ionic liquid chromium electroplating solution |
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Application publication date: 20180306 |