CN108468049B - Plastic deformation magnesium alloy surface sand surface treatment fluid and application thereof - Google Patents
Plastic deformation magnesium alloy surface sand surface treatment fluid and application thereof Download PDFInfo
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- CN108468049B CN108468049B CN201810273806.6A CN201810273806A CN108468049B CN 108468049 B CN108468049 B CN 108468049B CN 201810273806 A CN201810273806 A CN 201810273806A CN 108468049 B CN108468049 B CN 108468049B
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- magnesium alloy
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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
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/22—Acidic compositions for etching magnesium or alloys thereof
Abstract
The invention provides a plastic deformation magnesium alloy surface sand surface treatment fluid and application thereof, belonging to the technical field of metal material surface treatment. The sand surface treatment fluid comprises the following components: fluoroboric acid with the concentration of 4-7ml/L, and deionized water as a solvent. A plastic deformation magnesium alloy surface sand surface treatment method comprises the following steps: pretreatment, sand surface treatment, water washing, brightening, washing and drying. According to the technical scheme, the sand surface degree of the alloy surface is controlled only by controlling the treatment time of immersing the magnesium alloy workpiece into the sand surface treatment liquid, so that the method is safe and simple to operate, easy to control and excellent in effect. The treatment liquid is applied to the chemical sand surface treatment of the magnesium alloy workpiece, has simple operation, uniform and quick treatment effect, is easy to control the surface roughness and uniformity of treatment, and can meet the sand surface requirements of various plastic deformation magnesium alloy workpieces.
Description
Technical Field
The invention discloses a plastic deformation magnesium alloy surface sand surface treatment fluid and application thereof, belonging to the technical field of metal material surface treatment.
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. In order to improve the corrosion resistance of magnesium alloy devices, beautify the appearance of products and meet the requirements of surface light absorption of some special devices, the surface of the magnesium alloy needs to be treated.
With the wider application of magnesium alloy in industries such as military industry, 3c and the like, the market demands for surface treatment of magnesium alloy products are more and more strict. A series of magnesium alloy castings and extrusions represented by products of military industry and the like require surface treatment to form uniform sand surfaces so as to meet the requirements of special light reflection, texture and the like. At present, the methods for plastically deforming the sand surface of the magnesium alloy mainly comprise sand blasting, shot blasting, chemical treatment and the like. When the workpiece is treated by sand blasting and shot blasting, the surface of the workpiece is easy to deform, the surface uniformity is difficult to control, and the requirements of high precision and high uniformity cannot be met. The chemical treatment is mainly to carry out surface corrosion by mixed solution of nitric acid and sulfuric acid so as to achieve the effect of surface sand surface. However, the treatment method has certain limitation on the magnesium alloy grade, the treatment effect is not uniform, and the workpiece precision is easy to change due to local corrosion.
Disclosure of Invention
The invention overcomes the technical defects and provides a plastic deformation magnesium alloy surface sand surface treatment fluid and application thereof. The treatment liquid is adopted to carry out chemical sand surface treatment on the magnesium alloy, has simple operation and uniform and quick treatment effect, is easy to control the surface roughness and the uniformity of the treatment, and can meet the sand surface requirements of various plastic deformation magnesium alloy parts.
The invention relates to a plastic deformation magnesium alloy surface sand surface treatment fluid, which comprises the following components: fluoroboric acid with the concentration of 4-7ml/L, and deionized water as a solvent. The concentration is the volume of electrolyte contained per volume of solution.
A plastic deformation magnesium alloy surface sand surface treatment method comprises the following steps:
pretreatment: immersing the plastic deformation magnesium alloy workpiece into nitric acid with the concentration of 10ml/L, swinging the workpiece up and down at normal temperature, carrying out acid cleaning treatment for 1-5 minutes, and then washing for 10-60 seconds by using clean water;
sand surface treatment: immersing the pretreated workpiece into a sand surface treatment solution for treatment at normal temperature for 40-60 seconds;
washing with water: washing the magnesium alloy workpiece with the sand surface treated for 10-60 seconds by using clear water to obtain a workpiece with uniform sand surface;
washing and brightening: immersing the washed sand surface workpiece into a nitric acid solution with the concentration of 10ml/L again, treating for 10-20 seconds, and swinging the workpiece up and down to obtain a bright uniform sand surface workpiece;
cleaning and drying: and (5) washing the washed and bright magnesium alloy workpiece for 10-60 seconds by using clear water, and drying.
The sand surface treatment time is in positive correlation with the surface roughness of the magnesium alloy workpiece.
The invention also provides application of the plastic deformation magnesium alloy surface sand surface treatment fluid in magnesium alloy surface sand surface treatment.
The magnesium alloy workpiece is subjected to pretreatment before sand surface treatment, and the magnesium alloy workpiece is cleaned by pretreatment acid liquor till the magnesium alloy workpiece is cleaned, and further, the magnesium alloy workpiece is subjected to water washing after the sand surface treatment, and is further washed to be bright.
Compared with the prior art, the invention has the beneficial effects that:
(1) the process method is simple and quick to operate, and can quickly sand the surface of the plastically deformed magnesium alloy part; the alloy surface sanding degree is controlled only by controlling the treatment time of the workpiece immersed in the sanding treatment fluid, the operation is safe and simple, the control is easy, and the effect is excellent.
(2) The treatment solution provided by the technical scheme of the invention has the advantages of simple components, repeated use, long service life, low investment cost in actual production, no smoke, environmental friendliness and suitability for popularization and application. For the plastic deformation magnesium alloy workpiece, due to the complex structure and higher requirement on the fineness, the conventional pickling method is used, the viscosity of the acid liquor is high, the pickling carrying-out ratio is very high, the solution of the sand surface treatment liquid is clear, the carrying-out liquid is little, the medicament consumption is low, and the cost is greatly reduced. The flow marks of the treatment liquid are greatly reduced, excessive corrosion on the surface of the alloy is reduced, and the quality and the precision of the magnesium alloy workpiece are ensured.
(3) According to the plastic deformation magnesium alloy surface sand surface treatment liquid provided by the technical scheme, fluoroboric acid and metal cations in the magnesium alloy are subjected to a complex reaction to generate a boron-magnesium compound, the boron-magnesium compound has a protection effect on the magnesium alloy to form convex parts of the magnesium alloy, the generated hydrogen fluoride has a corrosion effect to corrode the magnesium alloy to form concave parts on the alloy surface, and F is used for corroding the magnesium alloy to form concave parts on the alloy surface-The sand cannot volatilize, so that the generated sand surface is bright and uniform, and the size change is small.
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 plastic deformation magnesium alloy surface sand surface treatment fluid comprises the following components: fluoroboric acid with the concentration of 4ml/L and deionized water as a solvent. The concentration is the volume of electrolyte contained per volume of solution.
A plastic deformation magnesium alloy surface sand surface treatment method comprises the following steps:
pretreatment: immersing the plastic deformation magnesium alloy workpiece into nitric acid with the concentration of 10ml/L, swinging the workpiece up and down at normal temperature, carrying out acid cleaning treatment for 1 minute, and then washing the workpiece for 10 seconds by using clear water;
sand surface treatment: immersing the pretreated workpiece into a sand surface treatment solution for treatment at normal temperature for 40 seconds;
washing with water: washing the magnesium alloy workpiece with the sand surface treated for 10 seconds by using clear water to obtain a workpiece with uniform sand surface;
washing and brightening: immersing the washed sand surface workpiece into a nitric acid solution with the concentration of 10ml/L again, treating for 10 seconds, and swinging the workpiece up and down to obtain a bright uniform sand surface workpiece;
cleaning and drying: and washing the washed and bright magnesium alloy workpiece for 10 seconds by using clear water, and drying.
The sand surface treatment time is in positive correlation with the surface roughness of the magnesium alloy workpiece.
Example 2
The invention relates to a plastic deformation magnesium alloy surface sand surface treatment fluid, which comprises the following components: fluoroboric acid with the concentration of 7ml/L and deionized water as a solvent. The concentration is the volume of electrolyte contained per volume of solution.
A plastic deformation magnesium alloy surface sand surface treatment method comprises the following steps:
pretreatment: immersing the plastic deformation magnesium alloy workpiece into nitric acid with the concentration of 10ml/L, swinging the workpiece up and down at normal temperature, carrying out acid cleaning treatment for 5 minutes to clean oil stains on the surface, then washing the workpiece for 60 seconds by using clean water, and washing away residual acid liquor;
sand surface treatment: immersing the pretreated workpiece into a sand surface treatment solution for treatment, wherein the treatment time is 60 seconds at normal temperature, and the treatment time is positively correlated with the surface roughness;
washing with water: washing the magnesium alloy workpiece with the sand surface treated by clear water for 60 seconds to remove residual fluoboric acid on the surface to obtain the workpiece with uniform sand surface,
washing and brightening: immersing the washed sand surface workpiece into a nitric acid solution with the concentration of 10ml/L again, swinging the workpiece up and down, and treating for 20 seconds to obtain a bright uniform sand surface workpiece;
cleaning and drying: and washing the bright magnesium alloy workpiece for 60 seconds by using clear water, and washing the residual acid liquor on the surface of the workpiece. And (5) drying.
Example 3
The invention relates to a plastic deformation magnesium alloy surface sand surface treatment fluid, which comprises the following components: fluoroboric acid with the concentration of 5ml/L and deionized water as a solvent. The concentration is the volume of electrolyte contained per volume of solution.
A plastic deformation magnesium alloy surface sand surface treatment method comprises the following steps:
pretreatment: immersing the plastic deformation magnesium alloy workpiece into nitric acid with the concentration of 10ml/L, swinging the workpiece up and down at normal temperature, carrying out acid cleaning treatment for 3 minutes to clean oil stains on the surface, then washing the workpiece for 30 seconds by using clean water, and washing away residual acid liquor;
sand surface treatment: immersing the pretreated workpiece into a sand surface treatment solution for treatment, wherein the treatment time is 50 seconds at normal temperature, and the treatment time is positively correlated with the surface roughness;
washing with water: washing the magnesium alloy workpiece with the sand surface treated for 40 seconds by using clean water to remove residual fluoboric acid on the surface to obtain the workpiece with uniform sand surface,
washing and brightening: immersing the washed sand surface workpiece into a nitric acid solution with the concentration of 10ml/L again, swinging the workpiece up and down, and treating for 15 seconds to obtain a bright uniform sand surface workpiece;
cleaning and drying: and washing the bright magnesium alloy workpiece for 15 seconds by using clear water, and washing the surface of the workpiece to remove residual acid liquor. And (5) drying.
Application example
The invention also provides application of the plastic deformation magnesium alloy surface sand surface treatment fluid in magnesium alloy surface sand surface treatment. In order to better use the invention, the magnesium alloy workpiece must be completely immersed in the sand surface treatment liquid, the magnesium alloy workpiece needs to be pretreated before being subjected to sand surface treatment, and the pretreatment acid liquid is ensured to be cleaned up, and further, the magnesium alloy workpiece needs to be washed by water after being subjected to sand surface treatment, and the magnesium alloy workpiece is further washed to be bright.
The application of the plastic deformation magnesium alloy surface sand surface treatment fluid in the magnesium alloy surface sand surface treatment comprises the following pretreatment processes: immersing the plastically deformed magnesium alloy workpiece in nitric acid with the concentration of 10ml/L, swinging the workpiece up and down at normal temperature, carrying out acid cleaning treatment for 1-5 minutes, and then washing the magnesium alloy workpiece for 10-60 seconds by using clear water.
The application of the plastic deformation magnesium alloy surface sand surface treatment fluid in the magnesium alloy surface sand surface treatment comprises the following steps: immersing the pretreated plastically deformed magnesium alloy workpiece into a sand surface treatment liquid for sand surface treatment, wherein the treatment conditions are as follows: normal temperature, the treatment time is 40-60 seconds; the processing time can be determined to be any time length in seconds within the range of 40-60 seconds according to needs.
The application of the plastic deformation magnesium alloy surface sand surface treatment fluid for the magnesium alloy surface sand surface treatment is characterized in that a plastic deformation magnesium alloy workpiece after the sand surface treatment needs to be washed by clean water for 10-60 seconds, and the residual sand surface treatment fluid on the surface of the magnesium alloy workpiece is washed clean to obtain a magnesium alloy workpiece with uniform sand surface;
in order to better use the invention, the application of the plastic deformation magnesium alloy surface sand surface treatment fluid in the magnesium alloy surface sand surface treatment, the magnesium alloy workpiece after the sand surface treatment water washing needs to be further washed to be bright: immersing the washed sand surface plastic deformation magnesium alloy workpiece into a nitric acid solution with the concentration of 10ml/L, washing for 10-20 seconds, and swinging the workpiece up and down to obtain a bright uniform sand surface workpiece; and (5) washing the washed and brightened plastic deformation magnesium alloy workpiece for 10-60 seconds by using clear water, and drying.
The sand surface treatment liquid is applied to the sand surface treatment of the magnesium alloy workpiece, and compared with the traditional method, the treatment liquid has the advantages of simple components, repeated use, long service life, low investment cost in actual production, no smoke, environmental friendliness and suitability for popularization and application. For the plastic deformation magnesium alloy workpiece, due to the complex structure and higher requirement on the fineness, the conventional pickling method is used, the viscosity of the acid liquor is high, the pickling carrying-out ratio is very high, the solution of the sand surface treatment liquid is clear, the carrying-out liquid is little, the medicament consumption is low, and the cost is greatly reduced. The flow marks of the treatment liquid are greatly reduced, excessive corrosion on the surface of the alloy is reduced, and the quality and the precision of the magnesium alloy workpiece are ensured.
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 (1)
1. The method for treating the sand surface on the surface of the plastic deformation magnesium alloy is characterized by comprising the following steps of:
pretreatment: immersing the plastic deformation magnesium alloy workpiece into nitric acid with the concentration of 10ml/L, swinging the workpiece up and down at normal temperature, carrying out acid cleaning treatment for 1-5 minutes, and then washing for 10-60 seconds by using clean water;
sand surface treatment: immersing the pretreated plastically deformed magnesium alloy workpiece into a sand surface treatment liquid for treatment at normal temperature for 40-50 seconds; the sand surface treatment time is in positive correlation with the surface roughness of the plastic deformation magnesium alloy workpiece; the sand surface treatment liquid is fluoroboric acid with the concentration of 4-7ml/L, and the solvent is deionized water;
washing with water: washing the plastic deformation magnesium alloy workpiece with the sand surface for 10-60 seconds to obtain a workpiece with uniform sand surface;
washing and brightening: immersing the washed sand surface plastic deformation magnesium alloy workpiece into a nitric acid solution with the concentration of 10ml/L again, treating for 10-20 seconds, and swinging the workpiece up and down to obtain a bright uniform sand surface workpiece;
cleaning and drying: and (5) washing the washed and brightened plastic deformation magnesium alloy workpiece for 10-60 seconds by using clear water, and drying.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130870A (en) * | 2006-08-23 | 2008-02-27 | 关东化学株式会社 | Laminated film |
| CN101613845A (en) * | 2008-06-25 | 2009-12-30 | 比亚迪股份有限公司 | A kind of Zirconium-base non-crystalline alloy compound material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040094235A1 (en) * | 2002-11-18 | 2004-05-20 | Ge Betz, Inc. | Chrome free treatment for aluminum |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130870A (en) * | 2006-08-23 | 2008-02-27 | 关东化学株式会社 | Laminated film |
| CN101613845A (en) * | 2008-06-25 | 2009-12-30 | 比亚迪股份有限公司 | A kind of Zirconium-base non-crystalline alloy compound material and preparation method thereof |
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