CN102226277A - Magnesium alloy chemical oxidation method - Google Patents
Magnesium alloy chemical oxidation method Download PDFInfo
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- CN102226277A CN102226277A CN2011101541260A CN201110154126A CN102226277A CN 102226277 A CN102226277 A CN 102226277A CN 2011101541260 A CN2011101541260 A CN 2011101541260A CN 201110154126 A CN201110154126 A CN 201110154126A CN 102226277 A CN102226277 A CN 102226277A
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- oxidation
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- oil removing
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Abstract
The invention belongs to the technical field of surface treatment, and relates to a process method improvement of minimizing effect of size to the utmost extent after the surface of the magnesium alloy part is performed a chemical oxidation. According to the invention, the magnesium alloy chemical oxidation method determines a first group test scheme according to the technological parameter employed by HB/Z5078 though an orthogonal experiment; for eliminating the mutual influence among the processes, oil removing, desmutting and oxidizing are carried out to test pieces, thereby a second group test scheme can be determined. Then a third group test scheme can be determined according to the first group test result and the second group test result. A technological parameter of optimum magnesium alloy chemical oxidation can be found by analyzing test data of the three groups. The magnesium alloy chemical oxidation method provided in the invention selects each parameter of oil removing, desmutting and oxidizing through tests, thereby corrosion measurement of parts can be effectively controlled, which guarantees the oxidation effect and minimizes effect of part size to the utmost extent, and ensures the oxidation quality of parts.
Description
Technical field
The invention belongs to process for treating surface, relate to and a kind of processing method to size impact is carried out reducing to greatest extent behind the chemical oxidation in the magnesium alloy parts surface.
Background technology
Magnesium alloy belongs to perishable alloy, requires strictly to control in each link in the course of processing.In the magnesium alloy chemical oxidizing process process magnesium alloy parts operation is mainly contained oil removing, bright dipping, oxidation.Therefore mainly treatment time, the treatment temp of oil removing, bright dipping, oxidation three operations are researched and analysed the influence of magnesium alloy oxidation accessory size.The technology that existing magnesium alloy oxidation is adopted is with reference to HB/Z5078-1978, but finds that in actual production this processing parameter is unreasonable, and etching extent is difficult to control, and is bigger to the size impact of part, thereby is difficult to guarantee part quality.
Summary of the invention
The objective of the invention is: provide a kind of and can effectively control etching extent, improved the magnesium alloy chemical method for oxidation of part quality by control process parameters.
Technical scheme of the present invention is: a kind of magnesium alloy chemical method for oxidation, and it comprises that the processing parameter that adopts according to HB/Z5078 determines the step of first group of test by orthogonal experiment;
Only comprise the step of the independent oil removing of testpieces, bright dipping, oxidation being determined second group of test;
Comprise test-results, choose suitable oil removing, bright dipping, oxygenation parameters and determine the step of the 3rd group of test according to first, second group.
Described magnesium alloy chemical method for oxidation,
(1). the oil removing process parameter is as follows:
(2). the bright dipping processing parameter is as follows:
For reducing the influence of bright dipping time to accessory size, the bright dipping time must strictly be controlled, and concrete parameter is:
Chromic anhydride 150g/l～250g/l
The temperature environment temperature
Time≤15S;
(3). the oxidizing process parameter
When temperature surpassed 30 ℃, the bright dipping time was no more than 10S.
A kind of magnesium alloy chemical method for oxidation, it comprises the steps:
Step 1: preliminary wiping oil removing;
Step 2: dress odd part;
Step 3: oil removing
Part in following solution after the oil removing, through hot water wash, cold wash,
In time remove the liquid level oil slick in the oil removing process;
Step 4: bright dipping
Part is in following solution after the bright dipping, through washed with de-ionized water;
Chromic anhydride 150g/l～250g/l
The temperature environment temperature
Time≤15S
Step 5: oxidation
Part carries out oxidation in following solution after, through washed with de-ionized water,
Step 6: oven dry;
Step 7: the part that dismounting is done.
Oil removing process parameter in the step 3 is as follows:
In the step 4, the bright dipping processing parameter is as follows:
For reducing the influence of bright dipping time to accessory size, the bright dipping time must strictly be controlled, and concrete parameter is:
Chromic anhydride 200g/l
The temperature environment temperature
Time≤15S, when temperature surpassed 30 ℃, the bright dipping time was no more than 10S.
Oxidizing process parameter in the step 5 is as follows:
Advantage of the present invention is: magnesium alloy chemical method for oxidation of the present invention is by each parameter of the selected oil removing of test, bright dipping, oxidation, thereby effectively control is to the etching extent of part, can when guaranteeing oxidation effectiveness, reduce influence to greatest extent, guarantee the oxidation quality of part accessory size.
Description of drawings
Fig. 1 is the related magnesium alloy parts barrel portion synoptic diagram of magnesium alloy chemical method for oxidation of the present invention.
Embodiment
Below the present invention is described in further details.
See also Fig. 1, it is a magnesium alloy parts barrel portion synoptic diagram related in the magnesium alloy chemical method for oxidation of the present invention.In the present embodiment, intercept 11 circular samples from the magnesium alloy parts barrel portion, specimen width is 40mm, and surfaceness requires identical with part status, and requirement test preceding measurement sample inside and outside footpath size is also noted down.
The present invention is directed to and remove oil temperature, time, oxidizing temperature, time, and the bright dipping time oxidizing process test is carried out repeatedly in the influence of accessory size, each oxidizing process test back is measured specimen size and is also noted down.
The present invention determines first group of testing program according to the processing parameter that HB/Z5078 adopted by orthogonal experiment earlier, and experimental result is as shown in table 1,
First group of testing program of table 1 and result: the HB/Z5078 processing parameter is to the influence of testpieces size
In the table 1, the oil removing time, the unit of bright dipping time and oxidization time is minute (min), oxidizing temperature unit be degree centigrade (℃).
Magnesium alloy chemical method for oxidation of the present invention is for getting rid of influencing each other of inter process, only to the independent oil removing of testpieces, bright dipping, the oxidation influence to the testpieces size, determines second group of testing program.Experimental result is as shown in table 2:
Second group of testing program of table 2 and result: the processing parameter of independent control is to the influence of testpieces size
Wherein, the oil removing time in the table 2 and the unit of oxidization time are minute (min), and bright dipping time unit is second (s), oxidizing temperature unit be degree centigrade (℃).
Magnesium alloy chemical method for oxidation of the present invention carries out determining the 3rd group of testing program after the optimum combination again according to the test-results of first, second group, provides the 3rd group of testing program and result below.
Table 3 the 3rd group of testing program and result: adjusted processing parameter is to the influence of testpieces size
Three groups of testing datas are analyzed
1. oil removing time and temperature are to the influence of size
The oil removing time is long more, it is big more to remove the high more influence to size of oil temperature.
A. in the time of 75 ℃, the single face corrosion rate is 6-10 μ m/ hour;
In the time of 90 ℃, the single face corrosion rate is 10-20 μ m/ hour.
2. bright dipping time and temperature are to the influence of size
The bright dipping time is bigger to the accessory size influence, and the single face corrosion rate is 5 μ m/ minutes.
3. oxidization time and oxidizing temperature are to the influence of size
Oxidization time and oxidizing temperature do not have influence substantially to size.
According to above-mentioned three groups of experiments, obtain the optimum parameter of magnesium alloy chemical method for oxidation of the present invention: the oil removing process parameter
Sodium phosphate 40g/l～60g/l, preferred 50g/l,
Sodium hydroxide 10g/l～25g/l, preferred 17.5g/l,
Water glass 20g/l～30g/l, preferred 25g/l,
Total alkalinity (being equivalent to NaOH) 15g/l～30g/l, preferred 22.5g/l,
60 ℃～70 ℃ of temperature, preferred 65 ℃,
Time, the time was no more than 10 minutes till cleaning up
The bright dipping processing parameter
For reducing the influence of bright dipping time to accessory size, the bright dipping time must strict control.Concrete parameter is:
Chromic anhydride 150g/l～250g/l, preferred 200g/l,
The temperature environment temperature
Time≤15S (when summer temperature surpasses 30 ℃, being no more than 10S)
The oxidizing process parameter
Potassium bichromate 30g/l～35g/l, preferred 32.5g/l,
Ammonium sulfate 30g/l～35g/l, preferred 32.5g/l,
O-2 potassium acid hydrogen potassium 15g/l～20g/l, preferred 17.5g/l,
PH value 4～4.5, preferred 4.25,
80 ℃～90 ℃ of temperature, preferred 85 ℃,
Time 15min～25min, preferred 17.5min.
Provide the complete procedure of magnesium alloy chemical method for oxidation of the present invention below:
Step 1: preliminary oil removing
The available clean cloth wiper element of being stained with organic solvents such as 180# washing gasoline or alcohol;
Step 2: dress is hung
The electric wire dress of selecting plastic ties that can heatproof for use or being surrounded by rubber plastic is hung, and it is correct that want the position that dress is hung, and prevents to calm the anger;
Step 3: oil removing
Part in following solution after the oil removing, through hot water wash, cold wash,
To often shake part in the oil removing process, in time remove the liquid level oil slick;
Step 4: bright dipping
Part after the bright dipping, cleans through deionized water (category-B) in following solution;
Chromic anhydride 150g/l～250g/l
The temperature environment temperature
Time≤15S (when summer temperature surpasses 30 ℃, being no more than 10S)
Step 5: oxidation
Part carries out oxidation in following solution after, clean through deionized water (category-B),
Step 6: oven dry
Temperature be 50 ℃～70 ℃ dry slot inner drying 20min～30min or with heat pressurized air dry up;
Step 7: dismounting
When dismantling the part of doing, must wear clean quality gloves (need to wet when taking part, must put on clean emgloves), avoid naked hand touch part.
The magnesium alloy chemical oxidation part that magnesium alloy chemical method for oxidation of the present invention adopts above-mentioned processing parameter to carry out, through repeatedly measuring accessory size, its dimensional change value is very little, meets the requirements fully.Thereby when guaranteeing oxidation effectiveness, reduce influence to greatest extent, effectively improved the oxidation quality of part accessory size.
Claims (7)
1. a magnesium alloy chemical method for oxidation is characterized in that,
Comprise that the processing parameter that adopts according to HB/Z5078 determines the step of first group of test by orthogonal experiment;
Only comprise the step of the independent oil removing of testpieces, bright dipping, oxidation being determined second group of test;
Comprise test-results, choose suitable oil removing, bright dipping, oxygenation parameters and determine the step of the 3rd group of test according to first, second group.
2. magnesium alloy chemical method for oxidation according to claim 1 is characterized in that:
(1). the oil removing process parameter is as follows:
(2). the bright dipping processing parameter is as follows:
For reducing the influence of bright dipping time to accessory size, the bright dipping time must strictly be controlled, and concrete parameter is:
Chromic anhydride 150g/l～250g/l
The temperature environment temperature
Time≤15S;
(3). the oxidizing process parameter
3. magnesium alloy chemical method for oxidation according to claim 1 and 2 is characterized in that: when temperature surpassed 30 ℃, the bright dipping time was no more than 10S.
4. a magnesium alloy chemical method for oxidation is characterized in that, comprises the steps:
Step 1: preliminary wiping oil removing;
Step 2: dress odd part;
Step 3: oil removing
Part in following solution after the oil removing, through hot water wash, cold wash,
In time remove the liquid level oil slick in the oil removing process;
Step 4: bright dipping
Part is in following solution after the bright dipping, through washed with de-ionized water;
Chromic anhydride 150g/l～250g/l
The temperature environment temperature
Time≤15S
Step 5: oxidation
Part carries out oxidation in following solution after, through washed with de-ionized water,
Step 6: oven dry;
Step 7: the part that dismounting is done.
5. magnesium alloy chemical method for oxidation according to claim 4 is characterized in that:
Oil removing process parameter in the step 3 is as follows:
6. according to claim 4 or 5 each described magnesium alloy chemical method for oxidation, it is characterized in that: in the step 4, the bright dipping processing parameter is as follows:
For reducing the influence of bright dipping time to accessory size, the bright dipping time must strictly be controlled, and concrete parameter is:
Chromic anhydride 200g/l
The temperature environment temperature
Time≤15S, when temperature surpassed 30 ℃, the bright dipping time was no more than 10S.
7. magnesium alloy chemical method for oxidation according to claim 6 is characterized in that, the oxidizing process parameter in the step 5 is as follows:
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691056A (en) * | 2012-06-13 | 2012-09-26 | 常州兰翔机械有限责任公司 | Method for treating chemical conversion coating on surface of magnesium alloy |
| CN104404495A (en) * | 2014-10-30 | 2015-03-11 | 青岛昌安达药业有限公司 | Alloy metal surface treatment liquid |
| CN104947126A (en) * | 2015-07-14 | 2015-09-30 | 山东省科学院新材料研究所 | Magnesium alloy cleaning agent |
| CN109161878A (en) * | 2018-11-08 | 2019-01-08 | 北京星航机电装备有限公司 | A kind of porous type ZM6 magnesium alloy parts gold is film chemical oxidation technology |
| CN109576689A (en) * | 2018-11-30 | 2019-04-05 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of oxidation of magnesium alloy topochemistry solution and the chemical oxidation method |
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| JPH11323571A (en) * | 1998-03-17 | 1999-11-26 | Matsushita Electric Ind Co Ltd | Surface treated magnesium or magnesium alloy product, primary treatment for coating and coating method |
| CN1673412A (en) * | 2005-04-12 | 2005-09-28 | 沈阳工业大学 | Magnesium and magnesium alloy chemical oxidation process |
| US20100075172A1 (en) * | 2006-04-19 | 2010-03-25 | Ropal Ag | Process for producing a corrosion-protected and high-gloss substrate |
-
2011
- 2011-06-10 CN CN2011101541260A patent/CN102226277A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11323571A (en) * | 1998-03-17 | 1999-11-26 | Matsushita Electric Ind Co Ltd | Surface treated magnesium or magnesium alloy product, primary treatment for coating and coating method |
| CN1673412A (en) * | 2005-04-12 | 2005-09-28 | 沈阳工业大学 | Magnesium and magnesium alloy chemical oxidation process |
| US20100075172A1 (en) * | 2006-04-19 | 2010-03-25 | Ropal Ag | Process for producing a corrosion-protected and high-gloss substrate |
Non-Patent Citations (4)
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| 《腐蚀与防护》 19990131 孙宝德等 铝合金抗大气腐蚀表面处理 第24-30页 4-7 第20卷, 第1期 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691056A (en) * | 2012-06-13 | 2012-09-26 | 常州兰翔机械有限责任公司 | Method for treating chemical conversion coating on surface of magnesium alloy |
| CN104404495A (en) * | 2014-10-30 | 2015-03-11 | 青岛昌安达药业有限公司 | Alloy metal surface treatment liquid |
| CN104947126A (en) * | 2015-07-14 | 2015-09-30 | 山东省科学院新材料研究所 | Magnesium alloy cleaning agent |
| CN104947126B (en) * | 2015-07-14 | 2018-04-06 | 山东省科学院新材料研究所 | A kind of magnesium alloy cleaning agent |
| CN109161878A (en) * | 2018-11-08 | 2019-01-08 | 北京星航机电装备有限公司 | A kind of porous type ZM6 magnesium alloy parts gold is film chemical oxidation technology |
| CN109576689A (en) * | 2018-11-30 | 2019-04-05 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of oxidation of magnesium alloy topochemistry solution and the chemical oxidation method |
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Application publication date: 20111026 |