CN100549230C - Mg alloy surface phosphating solution and phosphorization treatment process thereof - Google Patents
Mg alloy surface phosphating solution and phosphorization treatment process thereof Download PDFInfo
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- CN100549230C CN100549230C CNB2006100362671A CN200610036267A CN100549230C CN 100549230 C CN100549230 C CN 100549230C CN B2006100362671 A CNB2006100362671 A CN B2006100362671A CN 200610036267 A CN200610036267 A CN 200610036267A CN 100549230 C CN100549230 C CN 100549230C
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Abstract
A kind of Mg alloy surface phosphating solution and Mg alloy surface phosphorization treatment process, wherein, a kind of prescription of described Mg alloy surface phosphating solution is, contain potassium permanganate 0.1～10 gram in every liter of this solution, primary zinc phosphate 5～30 grams, ammonium bifluoride 10～30 grams, manganous sulfate 0.5～3.0 gram; Its another kind is filled a prescription and is, contains phytic acid 0.1～1.0 gram in every liter of this solution, primary ammonium phosphate 5～30 grams, and ammonium bifluoride 5～10 grams, zinc sulfate 0.5～2.0 restrains, and the pH of above-mentioned two kinds of prescriptions is all 3～5.Its phosphating process flow process is in addition: magnesium alloy component surface degreasing is also removed oxide film → washing → phosphatization → washing → sealing of hole → washing → oven dry; Phosphatization temperature is 15～80 ℃, and the time is 1～60 minute.Phosphating process of the present invention can obtain on the magnesium alloy component surface that protective value is good, thickness surpasses chromate film, careful uniform phosphate conversion film, and this film is stable, strong adhesion, erosion resistance and the life-span that can improve magnesium alloy component; Phosphating process is stable and be easy to control, and cost is low, less generation precipitation.
Description
Ji Intraoperative field
The present invention relates to magnesium alloy surface treatment Ji Intraoperative, be specifically related to a kind of Mg alloy surface phosphating solution and Mg alloy surface phosphorization treatment process.
Bei Jing Ji Intraoperative
Magnesium alloy is a kind of of proportion minimum in the structural metallic materials, owing to characteristics such as it have specific tenacity height, specific rigidity height, electromagnetic shielding is good, damping property is good, obtains increasingly extensive application in aircraft industry and telecommunications field.But the electricity level current potential of magnesium alloy very negative (2.34KV), chemical stability is very low, corrosion-resistant, in most of media, magnesium alloy is all unstable.Solve the corrosion prevention problem of magnesium alloy, can be from the new non-corrosive metal of control magazine content, preparation high purity alloys, development aspect such as ion implantation and laser surface modification start with.And, adopt protective membrane and coating to handle for large-scale commercial production, be method for most economical easy row.
U.S. Dow Chemical company has obtained chromate conversion coating on Mg alloy surface, famous Dow7 process using Sodium chromate and magnesium fluoride, generate chromic salts and metal jelly at Mg alloy surface, has certain resistance to corrosion, but adopted hexavalent chromium polluted environment, therefore, research direction is to seek environment-friendly chromium-free conversion film technology at present.
Summary of the invention
The objective of the invention is to propose a kind of Mg alloy surface phosphating solution and Mg alloy surface phosphorization treatment process.
Mg alloy surface phosphating solution of the present invention, its a kind of prescription are to contain in every liter of this solution:
Potassium permanganate 0.1～10 gram
Primary zinc phosphate 5～30 grams
Ammonium bifluoride 10～30 grams
Manganous sulfate 0.5～3.0 gram
The another kind prescription of this Mg alloy surface phosphating solution is to contain in every liter of this solution:
Phytic acid 0.1～1.0 gram
Primary ammonium phosphate 5～30 grams
Ammonium bifluoride 5～10 grams
Zinc sulfate 0.5～2.0 gram
Carry out the processing method of Mg alloy surface phosphatization with phosphating solution of the present invention, its technical process is: magnesium alloy component surface degreasing is also removed oxide film → washing → phosphatization → washing → sealing of hole → washing → oven dry; Phosphatization step in the technical process is specially: the magnesium alloy component after pre-treatment dipping is statically placed in to transfer to the pH value with phosphoric acid and strong aqua be to carry out bonderizing in 3.0～5.0 the above-mentioned phosphating solution, its working temperature is 15～80 ℃, and phosphating time is 1～60 minute.
Adopt phosphating process of the present invention, magnesium alloy component is handled in the zinc phosphide liquid that zinc salt and acid phosphate are formed, and can obtain on its surface that protective value is good, thickness surpasses chromate film, careful uniform phosphate conversion film.This conversion film plays shielding effect; stable, strong adhesion can stop the erosion of corrosive medium to body effectively, make the erosion resistance and the performance of the parts of magnesium alloy that essential improvement take place; it is protected in the environment of practical application fully, guarantee the life-span of magnesium alloy component.Mg alloy surface phosphating process of the present invention is easy to control, process stabilizing, and cost is low, less generation precipitation.
Embodiment
Below in conjunction with embodiment the present invention is made and to further describe.
Bonderizing to AZ91D magnesium alloy sample surfaces.
Embodiment 1
Take by weighing reagent by following prescription: potassium permanganate 5 grams, primary zinc phosphate 20 grams, ammonium bifluoride 10 grams, manganous sulfate 0.5 gram, earlier mentioned reagent is dissolved with less water respectively, mixed diluting to 1 liter promptly obtains phosphating solution of the present invention then, with strong aqua and phosphoric acid the pH value is transferred to 3.5; AZ91D magnesium alloy sample surfaces is carried out sandblast, immerse again after the washing in 3% the oxalic acid and handled for 10 seconds, putting into above-mentioned phosphating solution after the washing more at room temperature left standstill 4 minutes, wash once more after the taking-up, and then to place concentration be the sodium aluminate solution sealing of hole of 20 grams per liters, after at room temperature leaving standstill 10 minutes, take out this magnesium alloy sample washing back oven dry.The AZ91D magnesium alloy sample of the above-mentioned flow processing of process is in the neutral salt spray test hour post-etching area less than 1% through 24 hours.
Embodiment 2
Take by weighing reagent by following prescription: potassium permanganate 5 grams, primary zinc phosphate 10 grams, ammonium bifluoride 20 grams, manganous sulfate 0.5 gram, earlier mentioned reagent is dissolved with less water respectively, mixed diluting to 1 liter promptly obtains phosphating solution of the present invention then, with strong aqua and phosphoric acid the pH value is transferred to 4; AZ91D magnesium alloy sample surfaces is carried out sandblast, immerse again after the washing in 3% the oxalic acid and handled for 10 seconds, putting into above-mentioned phosphating solution after the washing more at room temperature left standstill 4 minutes, wash once more after the taking-up, and then to place concentration be the sodium aluminate solution sealing of hole of 20 grams per liters, after at room temperature leaving standstill 10 minutes, take out this magnesium alloy sample washing back oven dry.The AZ91D magnesium alloy sample of the above-mentioned flow processing of process is in the neutral salt spray test hour post-etching area less than 1% through 24 hours.
Embodiment 3
Take by weighing reagent by following prescription: potassium permanganate 3 grams, primary zinc phosphate 10 grams, ammonium bifluoride 10 grams, manganous sulfate 0.5 gram, earlier mentioned reagent is dissolved with less water respectively, mixed diluting to 1 liter promptly obtains phosphating solution of the present invention then, with strong aqua and phosphoric acid the pH value is transferred to 3.5; AZ91D magnesium alloy sample surfaces is carried out sandblast, immerse again after the washing in 3% the oxalic acid and handled for 10 seconds, putting into above-mentioned phosphating solution after the washing more at room temperature left standstill 4 minutes, wash once more after the taking-up, and then to place concentration be the sodium aluminate solution sealing of hole of 20 grams per liters, after at room temperature leaving standstill 10 minutes, take out this magnesium alloy sample washing back oven dry.The AZ91D magnesium alloy sample of the above-mentioned flow processing of process is in the neutral salt spray test hour post-etching area less than 1% through 24 hours.
Embodiment 4
Take by weighing reagent by following prescription: phytic acid 1 gram, primary ammonium phosphate 15 grams, ammonium bifluoride 10 grams, zinc sulfate 2 grams, earlier mentioned reagent is dissolved with less water respectively, mixed diluting to 1 liter promptly obtains phosphating solution of the present invention then, with strong aqua and phosphoric acid the pH value is transferred to 3.6; AZ91D magnesium alloy sample surfaces is carried out sandblast, immerse again after the washing in 3% the oxalic acid and handled for 10 seconds, putting into above-mentioned phosphating solution after the washing more at room temperature left standstill 3 minutes, wash once more after the taking-up, and then to place concentration be the sodium aluminate solution sealing of hole of 20 grams per liters, after at room temperature leaving standstill 10 minutes, take out this magnesium alloy sample washing back oven dry.The AZ91D magnesium alloy sample of the above-mentioned flow processing of process is in the neutral salt spray test hour post-etching area less than 1% through 24 hours.
Embodiment 5
Take by weighing reagent by following prescription: phytic acid 1 gram, primary ammonium phosphate 10 grams, ammonium bifluoride 20 grams, zinc sulfate 2 grams, earlier mentioned reagent is dissolved with less water respectively, mixed diluting to 1 liter promptly obtains phosphating solution of the present invention then, with strong aqua and phosphoric acid the pH value is transferred to 4; AZ91D magnesium alloy sample surfaces is carried out sandblast, immerse again after the washing in 3% the oxalic acid and handled for 10 seconds, putting into above-mentioned phosphating solution after the washing more at room temperature left standstill 3 minutes, wash once more after the taking-up, and then to place concentration be the sodium aluminate solution sealing of hole of 20 grams per liters, after at room temperature leaving standstill 10 minutes, take out this magnesium alloy sample washing back oven dry.The AZ91D magnesium alloy sample of the above-mentioned flow processing of process is in the neutral salt spray test hour post-etching area less than 1% through 24 hours.
Embodiment 6
Take by weighing reagent by following prescription: phytic acid 0.5 gram, primary ammonium phosphate 5 grams, ammonium bifluoride 20 grams, zinc sulfate 2 grams, earlier mentioned reagent is dissolved with less water respectively, mixed diluting to 1 liter promptly obtains phosphating solution of the present invention then, with strong aqua and phosphoric acid the pH value is transferred to 4; AZ91D magnesium alloy sample surfaces is carried out sandblast, immerse again after the washing in 3% the oxalic acid and handled for 10 seconds, putting into above-mentioned phosphating solution after the washing more at room temperature left standstill 3 minutes, wash once more after the taking-up, and then to place concentration be the sodium aluminate solution sealing of hole of 20 grams per liters, after at room temperature leaving standstill 10 minutes, take out this magnesium alloy sample washing back oven dry.The AZ91D magnesium alloy sample of the above-mentioned flow processing of process is in the neutral salt spray test hour post-etching area less than 1% through 24 hours.
The above; only be the preferable feasible embodiment of the present invention; can not therefore promptly limit to interest field of the present invention; concerning being familiar with those of ordinary skill in the art; such as use technical scheme of the present invention and technical conceive to make other various corresponding changes and distortion, and all these changes and distortion all should belong within the protection domain of claim of the present invention.
Claims (9)
1. a Mg alloy surface phosphating solution comprises following composition, promptly contains in every liter of this solution:
Potassium permanganate 0.1～10 gram;
Primary zinc phosphate 5～30 grams;
Ammonium bifluoride 10～30 grams;
Manganous sulfate 0.5～3.0 gram.
2. Mg alloy surface phosphating solution according to claim 1 is characterized in that, the pH of this phosphating solution is 3～5.
3. Mg alloy surface phosphating solution according to claim 1 is characterized in that, the prescription of this phosphating solution is: potassium permanganate 5 grams per liters, primary zinc phosphate 20 grams per liters, ammonium bifluoride 10 grams per liters, manganous sulfate 0.5 grams per liter, wherein the pH value is 3.5.
4. Mg alloy surface phosphating solution according to claim 1 is characterized in that, the prescription of this phosphating solution is: potassium permanganate 5 grams per liters, primary zinc phosphate 10 grams per liters, ammonium bifluoride 20 grams per liters, manganous sulfate 0.5 grams per liter, wherein the pH value is 4.
5. a Mg alloy surface phosphating solution comprises following composition, promptly contains in every liter of this solution:
Phytic acid 0.1～1.0 gram;
Primary ammonium phosphate 5～30 grams;
Ammonium bifluoride 5～10 grams;
Zinc sulfate 0.5～2.0 gram.
6. Mg alloy surface phosphating solution according to claim 5 is characterized in that, the pH value of this phosphating solution is 3～5.
7. Mg alloy surface phosphating solution according to claim 5 is characterized in that, the prescription of this phosphating solution is: phytic acid 1 grams per liter, primary ammonium phosphate 15 grams per liters, ammonium bifluoride 10 grams per liters, zinc sulfate 2 grams per liters, wherein the pH value is 3.6.
8. Mg alloy surface phosphating solution according to claim 5 is characterized in that, the prescription of this phosphating solution is: phytic acid 1 grams per liter, primary ammonium phosphate 10 grams per liters, ammonium bifluoride 20 grams per liters, zinc sulfate 2 grams per liters, wherein the pH value is 4.
9. a phosphating solution is used to handle the technology of Mg alloy surface, it is characterized in that its flow process of this technology is: magnesium alloy component surface degreasing is also removed oxide film → washing → phosphatization → washing → sealing of hole → washing → oven dry; Phosphatization step in the technical process is specially: the dipping of the magnesium alloy component after the pre-treatment is statically placed in claim 1 or the 5 described phosphating solutions carries out bonderizing, its working temperature is 15～80 ℃, and phosphating time is 1～60 minute.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100362671A CN100549230C (en) | 2006-06-30 | 2006-06-30 | Mg alloy surface phosphating solution and phosphorization treatment process thereof |
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| CNB2006100362671A CN100549230C (en) | 2006-06-30 | 2006-06-30 | Mg alloy surface phosphating solution and phosphorization treatment process thereof |
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| CN100549230C true CN100549230C (en) | 2009-10-14 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019006630A1 (en) * | 2017-07-03 | 2019-01-10 | 深圳市盈恒科技有限公司 | Phosphating agent for magnesium alloy, metal part and surface phosphatization process therefor |
| WO2019006674A1 (en) * | 2017-07-04 | 2019-01-10 | 深圳市长宏泰科技有限公司 | Magnesium alloy phosphating agent, metal component, and surface phosphating treatment method therefor |
| CN108385091B (en) * | 2018-03-15 | 2020-12-18 | 西安理工大学 | Surface chemical coloring method for magnesium alloy |
| CN109930143A (en) * | 2019-04-24 | 2019-06-25 | 宁波瑞亚紧固件制造有限公司 | A kind of processing method on high-intensity fasteners surface |
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