CN108251844B - Bright treatment liquid for magnesium alloy die castings - Google Patents
Bright treatment liquid for magnesium alloy die castings Download PDFInfo
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- CN108251844B CN108251844B CN201810273805.1A CN201810273805A CN108251844B CN 108251844 B CN108251844 B CN 108251844B CN 201810273805 A CN201810273805 A CN 201810273805A CN 108251844 B CN108251844 B CN 108251844B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/02—Light metals
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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to a magnesium alloy die casting brightening treatment liquid which is simple in preparation, easy in raw material obtaining, stable in quality, small in pollution and suitable for brightening magnesium alloy die castings produced in a large scale. A brightening treatment liquid for a magnesium alloy die casting comprises the following components: hydrogen peroxide with the concentration of 10-15ml/L, triethylene tetramine with the concentration of 18-23ml/L, cellulose melt with the concentration of 25-35ml/L, OP-10 with the concentration of 0.3-0.7ml/L and the balance of water. Wherein the molten cellulose is sodium carboxymethyl cellulose. The working temperature of the treatment liquid is 40-50 ℃, and the treatment time is 15-30 seconds.
Description
Technical Field
The invention discloses a brightening treatment liquid for a magnesium alloy die casting, and belongs to the technical field of surface treatment of metal materials.
Background
The magnesium alloy is formed by adding other elements into magnesium as a base. The method is characterized in that: the aluminum alloy has the advantages of low density, high specific strength, high specific modulus, good heat dissipation, good shock absorption, high impact load bearing capacity compared with aluminum alloy, and good organic matter and alkali corrosion resistance. The magnesium alloy is mainly applied to the fields of aerospace, electronics, automobiles and the like.
Along with the more and more extensive application of magnesium alloy, the market has more and more severe requirements on the surface treatment of magnesium alloy products, the magnesium alloy is extremely easy to oxidize in the air due to high activity, great difficulty is brought to the pretreatment of the magnesium alloy, the pretreatment selects chemicals with too strong oxidizing property, parts easy to corrode, and selects too weak chemicals, and a natural oxidation film on the surface is not easy to clean, so that the oxidation quality in the later period is influenced.
Magnesium alloy die castings have been widely used in the fields of automobile parts, electronic products, electric tools and the like, and the requirements of natural-color bright treatment on the surfaces of the magnesium alloy die castings are increasing day by day, but the magnesium alloy die castings are difficult to be washed brightly by common bright acid washing treatment due to the defects of porous surfaces, large segregation layers and the like of the magnesium alloy die castings, so that the application expansion of the magnesium alloy die castings is limited. The invention designs a novel natural-color bright cleaning treatment liquid for magnesium alloy die castings, and solves the problem that the magnesium alloy die castings are difficult to clean.
Disclosure of Invention
The invention provides the magnesium alloy die casting brightening treatment liquid which is simple in preparation, easy in raw material obtaining, stable in quality, small in pollution and suitable for brightening the magnesium alloy die casting produced on a large scale.
In order to achieve the purpose, the invention is realized by the following technical scheme: a brightening treatment liquid for magnesium alloy die castings, which comprises the following components: the treating fluid comprises hydrogen peroxide, triethylene tetramine, molten cellulose and OP-10, wherein the concentration of the hydrogen peroxide is 10-15ml/L, the concentration of the triethylene tetramine is 18-23ml/L, and the concentration of the molten cellulose is 25-35ml/L, OP-10 and 0.3-0.7 ml/L.
Preferably, the treatment fluid components include: the treating fluid comprises hydrogen peroxide, triethylene tetramine, fusible cellulose and OP-10, wherein the concentration of the hydrogen peroxide is 10ml/L, the concentration of the triethylene tetramine is 20ml/L, and the concentration of the fusible cellulose is 30ml/L, OP-10 and 0.5 ml/L.
The molten cellulose is sodium carboxymethyl cellulose.
The working temperature of the treatment liquid is 40-50 ℃, and the treatment time is 15-30 seconds.
The treatment liquid takes deionized water as a solvent, and the concentration is the mass or volume of electrolyte contained in a unit volume of solution.
A surface brightening treatment process for treating a magnesium alloy die casting by using the treatment fluid comprises the following steps: and (3) immersing the degreased and washed magnesium alloy die casting into a treatment solution, keeping the temperature at 40-50 ℃, and treating for 15-30 seconds to obtain the magnesium alloy die casting.
Compared with the prior art, the invention has the beneficial effects that:
(1) the magnesium alloy die casting brightening treatment liquid provided by the invention is simple and easily available in formula, wide in raw material source, low in cost, safe and environment-friendly in components, suitable for treating the surface of a magnesium alloy metal product, convenient and practical.
(2) The treating fluid does not contain high-concentration fluoride ions, and a proper surfactant is added to promote the cleaning process. In addition, the organic amine-containing compound is included, so that the release of nitrogen oxide can be greatly reduced. Compared with the traditional process, the amount of nitrogen oxide pollutants is reduced by more than 90 percent, and the production operation environment is greatly improved.
(3) In the actual production process, the traditional pickling method has the defects of large carrying-out and poor brightening effect due to high viscosity of pickling solution. The formula and the process method can effectively remove the surface oxide film and can also effectively inhibit the excessive corrosion of the magnesium alloy. The magnesium alloy die casting processed by the method can obtain the natural color bright effect, and has good brightness, uniform appearance, and good high temperature resistance and salt spray resistance. And the defects that the surface of the magnesium alloy die casting is porous, the segregation layer is large, the magnesium alloy die casting is difficult to wash and the like by using the traditional method can be overcome.
(4) The traditional nitric acid-based washing liquid is easy to generate oxynitride, so that red smoke is generated on the cleaning site, and the environmental pollution is great. The method has the advantages of simple process, low production cost, environmental friendliness, oil stain and carbon deposit removal, no toxicity, no pollution and environmental protection, improves the oxidability of the treatment liquid by using the hydrogen peroxide, and activates the surface of the magnesium alloy casting while removing the grease, thereby being suitable for industrial production.
(5) The use of the cellulose melt and the triethylene tetramine can effectively prevent the adhesion of surface solids, and no secondary precipitation is generated in the actual treatment process.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited to these examples, and all changes or equivalent substitutions that do not depart from the spirit of the present invention are intended to be included within the scope of the present invention.
Example 1
The invention is realized by the following technical scheme: a brightening treatment liquid for magnesium alloy die castings, which comprises the following components: the treatment solution comprises 15ml/L of hydrogen peroxide, 18ml/L of triethylene tetramine and 0.5ml/L of fused cellulose, wherein the fused cellulose is 35ml/L, OP-10.
The molten cellulose is sodium carboxymethyl cellulose.
The working temperature of the treatment liquid is 40-50 ℃, and the treatment time is 15-30 seconds.
Example 2
A brightening treatment liquid for a magnesium alloy die casting, which comprises the following components: the treating fluid comprises hydrogen peroxide, triethylene tetramine, fusible cellulose and OP-10, wherein the concentration of the hydrogen peroxide is 10ml/L, the concentration of the triethylene tetramine is 20ml/L, and the concentration of the fusible cellulose is 30ml/L, OP-10 and 0.5 ml/L.
The molten cellulose is sodium carboxymethyl cellulose.
The working temperature of the treatment liquid is 40-50 ℃, and the treatment time is 15-30 seconds.
Example 3
A brightening treatment liquid for a magnesium alloy die casting, which comprises the following components: the treating fluid comprises hydrogen peroxide, triethylene tetramine, fusible cellulose and OP-10, wherein the concentration of the hydrogen peroxide is 10ml/L, the concentration of the triethylene tetramine is 18ml/L, and the concentration of the fusible cellulose is 25ml/L, OP-10 and 0.3 ml/L.
The molten cellulose is sodium carboxymethyl cellulose.
The working temperature of the treatment liquid is 40-50 ℃, and the treatment time is 15-30 seconds.
Example 4
A brightening treatment liquid for a magnesium alloy die casting, which comprises the following components: the treating fluid comprises 15ml/L of hydrogen peroxide, 23ml/L of triethylene tetramine and 0.7ml/L of fused cellulose, wherein the fused cellulose is 35ml/L, OP-10.
The molten cellulose is sodium carboxymethyl cellulose.
The working temperature of the treatment liquid is 40-50 ℃, and the treatment time is 15-30 seconds.
The treatment liquid takes deionized water as a solvent, and the concentration is the mass or volume of electrolyte contained in a unit volume of solution.
A surface polishing treatment process for treating a magnesium alloy die casting by using the treatment liquid in the embodiment 1-4 comprises the following steps: immersing the degreased and washed magnesium alloy die casting into a treatment solution, keeping the temperature at 40-50 ℃, and treating for 15-30 seconds to obtain the magnesium alloy die casting; the temperature may be 40, 42, 45, 47, 48, 50 ℃ and the treatment time may be 15, 20, 25, 30 seconds.
The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A magnesium alloy die casting surface brightening treatment process is characterized in that a magnesium alloy die casting after degreasing and water washing is immersed into treatment liquid, the temperature is kept at 40-50 ℃, and the treatment time is 15-30 seconds;
the treatment fluid consists of the following components: the treating solution comprises hydrogen peroxide, triethylene tetramine, molten cellulose and OP-10, wherein the concentration of the hydrogen peroxide is 10-15ml/L, the concentration of the triethylene tetramine is 18-23ml/L, the concentration of the molten cellulose is 25-35ml/L, OP-10 and the concentration of the molten cellulose is 0.3-0.7ml/L, and the molten cellulose is sodium carboxymethylcellulose.
2. The surface brightening process for the magnesium alloy die casting according to claim 1, wherein in the treatment solution, the concentration of hydrogen peroxide is 10ml/L, the concentration of triethylene tetramine is 20ml/L, the concentration of molten cellulose is 30ml/L, OP-10 ml/L, and the molten cellulose is sodium carboxymethyl cellulose.
3. The surface brightening process for magnesium alloy die castings according to claim 1 or 2, characterized in that the treatment liquids are deionized water as a solvent, and the concentration is the mass or volume of the electrolyte contained in the unit volume of the solution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810273805.1A CN108251844B (en) | 2018-03-29 | 2018-03-29 | Bright treatment liquid for magnesium alloy die castings |
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| CN201810273805.1A CN108251844B (en) | 2018-03-29 | 2018-03-29 | Bright treatment liquid for magnesium alloy die castings |
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| CN108251844B true CN108251844B (en) | 2020-03-10 |
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| US20110189049A1 (en) * | 2008-05-09 | 2011-08-04 | Martin Beaulieu | Method for treating odors |
| CN102101977B (en) * | 2009-12-18 | 2015-09-16 | 安集微电子（上海）有限公司 | A kind of chemical mechanical polishing liquid |
| CN102101982A (en) * | 2009-12-18 | 2011-06-22 | 安集微电子（上海）有限公司 | Chemical mechanical polishing solution |
| CN102329572B (en) * | 2011-09-20 | 2013-08-21 | 深圳市力合材料有限公司 | Copper chemical and mechanical polishing combination |
| CN107723720B (en) * | 2017-10-09 | 2019-06-18 | 广州三孚新材料科技股份有限公司 | A kind of aluminium and aluminium alloy remove film and its application |
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