CN101078114A - Magnesium alloy surface chemistry transformation treatment technique - Google Patents
Magnesium alloy surface chemistry transformation treatment technique Download PDFInfo
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- CN101078114A CN101078114A CN 200610035663 CN200610035663A CN101078114A CN 101078114 A CN101078114 A CN 101078114A CN 200610035663 CN200610035663 CN 200610035663 CN 200610035663 A CN200610035663 A CN 200610035663A CN 101078114 A CN101078114 A CN 101078114A
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Abstract
The invention relates to magnesium alloy surface chemical processing techniques which includes the pre-treating, the actively treat, water washing, chemical film treating and back-treating. A layer of compact chemical film is formed on the surface of the magnesium alloy. The process has simple batch formula, low cost and convenience operation. The chemical film has good adhesion, strong anti-corrosion; also the process does not include the phosphor and chrome, so it would not pollute the environment.
Description
Technical field
The present invention relates to the treatment technology of metallic surface, be specifically related to a kind of technology of Mg alloy surface being carried out the chemical conversion processing.
Background technology
Magnesium alloy has very high specific tenacity, specific rigidity, than Young's modulus and good heat-conductivity conducting, have good damping shock absorption and electro-magnetic screen function simultaneously, be widely used in automobile making, aerospace, telecommunications field etc., be described as " the green engineering material of 21st century ".Yet because the chemically reactive of magnesium alloy itself is higher, in air, be easy to oxidation, very easily under various envrionment conditionss, corrode, thereby hindered the widespread use of magnesium alloy.
Mg alloy surface is carried out chemical modification, particularly Mg alloy surface is carried out chemical chemical modification, be improve corrosion resistance of magnesium alloy can with one of effective way that improves its external coating sticking power.But traditional Mg alloy surface is carried out the method for chemical chemical modification, have that prescription is complicated, process is difficult to control, operational difficulty, to shortcomings such as environment and human body harm are bigger.Thereby the magnesium alloy surface chemical chemical modifying process of developing a kind of high-efficient simple and having the better feature of environmental protection becomes the task of top priority of industry.
Summary of the invention
The objective of the invention is to provides a kind of magnesium alloy surface chemistry transformation treatment technique at above-mentioned the deficiencies in the prior art, and this technological process is simple, and is easy and simple to handle, and efficient is high and have a feature of environmental protection preferably.
Magnesium alloy surface chemistry transformation treatment technique provided by the invention is characterized in that, comprises following operation steps:
1) pre-treatment: magnesium alloy work-piece surface is carried out mechanical polishing, polishing, degreasing degreasing, carry out surface sand-blasting, alkali cleaning, pickling then respectively;
2) activation treatment: utilize hydrofluoric acid that pretreated magnesium alloy workpiece is carried out activation treatment, 8～15 minutes treatment times;
3) water flushing: with deionized water workpiece is washed, and oven dry;
4) chemical membrane is handled: the magnesium alloy member after will drying immerses the chemical membrane that contains magnesium salts, dispersion agent and transforms in the solution, and controlled temperature is 55～70 ℃, and the pH value is 3.2～3.8, and soak time is 10～15 minutes, carries out conversion processing; Water washes and rinsed with deionized water respectively subsequently, oven dry;
5) aftertreatment: the magnesium alloy member surface after film forming applies one deck sealing of hole layer.
In the above-mentioned treatment process, in step 1), also be included in the step of carrying out ultrasonic cleaning after the sandblast, alkali cleaning, acid pickling step.
In the above-mentioned treatment process, step 2) hydrofluoric acid concentration that is adopted in the activation treatment is 8～15%, and the temperature during activation is 15～30 ℃.
In the above-mentioned treatment process, the magnesium salts that the step 4) chemical membrane is adopted in handling is that concentration is sal epsom or the magnesium chloride solution of 25～40g/L.
In the above-mentioned treatment process, the dispersion agent that the step 4) chemical membrane is adopted in handling is that concentration is the tannic acid solution of 2.8～3.5g/L.
Implement magnesium alloy surface chemistry transformation treatment technique provided by the invention, have fill a prescription simple, cost characteristics low, easy and simple to handle, the chemical films sticking power that obtains after treatment is good, corrosion resistance is strong, and harmful elements such as not phosphorous in this technological process, chromium, nontoxic, environmentally friendly, both rotproofings between the production process of suitable magnesium alloy are applicable to again in order to improve the resistance to corrosion of magnesium alloy workpiece integral surface.
Description of drawings
Fig. 1 is the schema of magnesium alloy surface chemistry transformation treatment technique of the present invention.
Fig. 2 is the magnesium alloy surface structure synoptic diagram of an embodiment gained of technology of the present invention.
Fig. 3 is the pictorial diagram after the magnesium alloy of an embodiment gained of technology of the present invention carries out corrosion test.
Embodiment
Below in conjunction with specific embodiment in detail the present invention is described in detail.
Embodiment 1
Magnesium alloy workpiece is handled as follows:
1) pre-treatment: mechanical polishing, polishing, degreasing degreasing are carried out in magnesium alloy workpiece 1 surface, carry out surface sand-blasting, ultrasonic cleaning, alkali cleaning, ultrasonic cleaning, pickling, ultrasonic cleaning processing then respectively;
2) activation treatment: utilize 8% hydrofluoric acid pretreated magnesium alloy workpiece to be carried out activation treatment, 15 minutes treatment times, 15 ℃ of temperature;
3) water flushing: with deionized water workpiece is washed, and oven dry;
4) chemical membrane is handled: the magnesium alloy member after will dry immerses in the chemical membrane conversion solution of tannic acid solution of the Adlerika that contains 25g/L, 2.8g/L, controlled temperature is 55～70 ℃, the pH value is 3.2～3.8, and soak time is 10～15 minutes, carries out conversion processing; Water washes and rinsed with deionized water respectively subsequently, oven dry;
5) aftertreatment: the magnesium alloy member surface after film forming applies one deck sealing of hole layer.
Resulting surface treated magnesium alloy workpiece is a chemical conversion rete 2 on the upper strata of magnesium alloy workpiece 1 as shown in Figure 1, and sealing of hole layer 3 is positioned at outermost layer.
Magnesium alloy workpiece is handled as follows:
1) pre-treatment: mechanical polishing, polishing, degreasing degreasing are carried out in magnesium alloy workpiece 1 surface, carry out surface sand-blasting, ultrasonic cleaning, alkali cleaning, ultrasonic cleaning, pickling, ultrasonic cleaning processing then respectively;
2) activation treatment: utilize 10% hydrofluoric acid pretreated magnesium alloy workpiece to be carried out activation treatment, 8 minutes treatment times, 30 ℃ of temperature;
3) water flushing: with deionized water workpiece is washed, and oven dry;
4) chemical membrane is handled: the magnesium alloy member after will dry immerses in the chemical membrane conversion solution of tannic acid solution of the Adlerika that contains 40g/L, 3.5g/L, controlled temperature is 55～70 ℃, the pH value is 3.2～3.8, and soak time is 10～15 minutes, carries out conversion processing; Water washes and rinsed with deionized water respectively subsequently, oven dry;
5) aftertreatment: the magnesium alloy member surface after film forming applies one deck sealing of hole layer.
Magnesium alloy workpiece is handled as follows:
1) pre-treatment: mechanical polishing, polishing, degreasing degreasing are carried out in magnesium alloy workpiece 1 surface, carry out surface sand-blasting, ultrasonic cleaning, alkali cleaning, ultrasonic cleaning, pickling, ultrasonic cleaning processing then respectively;
2) activation treatment: utilize 11% hydrofluoric acid pretreated magnesium alloy workpiece to be carried out activation treatment, 10 minutes treatment times, 25 ℃ of temperature;
3) water flushing: with deionized water workpiece is washed, and oven dry;
4) chemical membrane is handled: the magnesium alloy member after will dry immerses in the chemical membrane conversion solution of tannic acid solution of the Adlerika that contains 32g/L, 3.0g/L, controlled temperature is 55～70 ℃, the pH value is 3.2～3.5, and soak time is 10～12 minutes, carries out conversion processing; Water washes and rinsed with deionized water respectively subsequently, oven dry;
5) aftertreatment: the magnesium alloy member surface after film forming applies one deck sealing of hole layer.
The surface treated magnesium alloy workpiece of gained is behind 8 hours salt spray corrosion tests, and the picture in kind of sample as shown in Figure 3.
Claims (5)
1. a magnesium alloy surface chemistry transformation treatment technique is characterized in that, as follows operation:
1) pre-treatment: magnesium alloy work-piece surface is carried out mechanical polishing, polishing, degreasing degreasing, carry out surface sand-blasting, alkali cleaning, cleanup acid treatment then respectively;
2) activation treatment: utilize hydrofluoric acid that pretreated magnesium alloy workpiece is carried out activation treatment, 8～15 minutes treatment times;
3) water flushing: with deionized water workpiece is washed, and oven dry;
4) chemical membrane is handled: the magnesium alloy member after will drying immerses the chemical membrane that contains magnesium salts, dispersion agent and transforms in the solution, and controlled temperature is 55～70 ℃, and the pH value is 3.2～3.8, and soak time is 10～15 minutes, carries out conversion processing; Water washes and rinsed with deionized water respectively subsequently, oven dry;
5) aftertreatment: the magnesium alloy member surface after film forming applies one deck sealing of hole layer.
2. surface chemistry transformation treatment technique according to claim 1 is characterized in that, also is included in the step of carrying out ultrasonic cleaning after the sandblast, alkali cleaning, acid pickling step in step 1).
3. surface chemistry transformation treatment technique according to claim 1 and 2 is characterized in that step 2) hydrofluoric acid concentration that adopted in the activation treatment is 8～15%, the temperature during activation is 15～30 ℃.
4. surface chemistry transformation treatment technique according to claim 1 and 2 is characterized in that, the magnesium salts that the step 4) chemical membrane is adopted in handling is that concentration is sal epsom or the magnesium chloride solution of 25～40g/L.
5. surface chemistry transformation treatment technique according to claim 1 and 2 is characterized in that, the dispersion agent that the step 4) chemical membrane is adopted in handling is that concentration is the tannic acid solution of 2.8～3.5g/L.
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| CN 200610035663 CN101078114A (en) | 2006-05-26 | 2006-05-26 | Magnesium alloy surface chemistry transformation treatment technique |
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| CN 200610035663 CN101078114A (en) | 2006-05-26 | 2006-05-26 | Magnesium alloy surface chemistry transformation treatment technique |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469421B (en) * | 2007-12-29 | 2010-12-22 | 比亚迪股份有限公司 | Film forming solution for magnesium alloy chemical composition coating and preparation thereof |
| CN102337507A (en) * | 2010-07-28 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Plated workpiece and manufacturing method thereof |
| CN102534612A (en) * | 2010-12-30 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Magnesium alloy surface anticorrosive treatment method and magnesium product thereof |
| CN102953106A (en) * | 2012-11-20 | 2013-03-06 | 无锡常安通用金属制品有限公司 | Protective layer for metal surface and preparation thereof |
| CN104827796A (en) * | 2015-04-25 | 2015-08-12 | 桐城运城制版有限公司 | Surface processing method of printing template |
| WO2017063372A1 (en) * | 2015-10-14 | 2017-04-20 | 先健科技(深圳)有限公司 | Absorbable iron-based alloy medical instrument implant and manufacturing method |
| CN110292665A (en) * | 2019-07-05 | 2019-10-01 | 江苏沣沅医疗器械有限公司 | A kind of composite coating and preparation method thereof of the corrosion-resistant anti-oxidant anti-inflammatory of Mg alloy surface |
| CN113897616A (en) * | 2021-10-18 | 2022-01-07 | 南京理工大学 | Magnesium alloy surface anticorrosion treatment process |
-
2006
- 2006-05-26 CN CN 200610035663 patent/CN101078114A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469421B (en) * | 2007-12-29 | 2010-12-22 | 比亚迪股份有限公司 | Film forming solution for magnesium alloy chemical composition coating and preparation thereof |
| CN102337507A (en) * | 2010-07-28 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Plated workpiece and manufacturing method thereof |
| CN102337507B (en) * | 2010-07-28 | 2014-04-30 | 鸿富锦精密工业（深圳）有限公司 | Plated workpiece and manufacturing method thereof |
| CN102534612A (en) * | 2010-12-30 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Magnesium alloy surface anticorrosive treatment method and magnesium product thereof |
| CN102953106A (en) * | 2012-11-20 | 2013-03-06 | 无锡常安通用金属制品有限公司 | Protective layer for metal surface and preparation thereof |
| CN102953106B (en) * | 2012-11-20 | 2016-02-24 | 江苏高博智融科技有限公司 | A kind of protective layer for metallic surface and preparation thereof |
| CN104827796A (en) * | 2015-04-25 | 2015-08-12 | 桐城运城制版有限公司 | Surface processing method of printing template |
| WO2017063372A1 (en) * | 2015-10-14 | 2017-04-20 | 先健科技(深圳)有限公司 | Absorbable iron-based alloy medical instrument implant and manufacturing method |
| CN110292665A (en) * | 2019-07-05 | 2019-10-01 | 江苏沣沅医疗器械有限公司 | A kind of composite coating and preparation method thereof of the corrosion-resistant anti-oxidant anti-inflammatory of Mg alloy surface |
| CN113897616A (en) * | 2021-10-18 | 2022-01-07 | 南京理工大学 | Magnesium alloy surface anticorrosion treatment process |
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