CN1673412A - Magnesium and magnesium alloy chemical oxidation process - Google Patents
Magnesium and magnesium alloy chemical oxidation process Download PDFInfo
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- CN1673412A CN1673412A CN 200510046234 CN200510046234A CN1673412A CN 1673412 A CN1673412 A CN 1673412A CN 200510046234 CN200510046234 CN 200510046234 CN 200510046234 A CN200510046234 A CN 200510046234A CN 1673412 A CN1673412 A CN 1673412A
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Abstract
The chemical magnesium and magnesium alloy oxidizing process includes the technological steps of dehydrogenation, chemically deoiling, washing with hot water, washing with cold water, polishing, washing with cold water and chemical oxidization. The chemical oxidizing solution consists of methyl tetrahydroxyl phthalic anhydride, potassium sulfate or aluminum acetate, boric acid, potassium dichromate or sodium dichromate or sodium tripolyhosphate or sodium sulfite, ammonium molybdate or diammonium biphophate, ammonium nickel sulfate, deionized water and optional dithio dipropyl sulfonate in certain proportion. The present invention can obtain chemical oxide film with corrosion rate not more than 3.739 mm/a. In different chemical oxidizing conditions, oxide films of different colors may be prepared. The present invention may be applied in aeronautics, astronautics, electronics, communication, building, automobile and other industry.
Description
Technical field
The present invention relates to the metallic surface processing technology field, particularly relate to the surface chemistry method for oxidation of magnesium and magnesium alloy.
Background technology
Magnesium and magnesium alloy are as a kind of lightweight engineered structured material, and it is used more and more widely.Magnesium and magnesium alloy have that damping property is good, density is little and advantages such as high specific strength and high specific stiffness, are important aviation and aerospace structured materials.But, magnesium and magnesium alloy also have poor heat resistance, solidity to corrosion poor, wear no resistance and shortcoming such as ornamental difference, therefore limited its Application Areas.Chemical oxidation is that magnesium and magnesium alloy are carried out surface treatment, thereby improves the important method of its performance.Be according to the present domestic and international several magnesium of reported in literature and the method for magnesium alloy surface chemical oxidation below, as shown in table 1.(reference: [1] high bridge wisdom. corrosion resisting property research [J] sufacing (day) 1996 of the preparation of nearest anode oxide film and film, 46 (5): 390～395 [2] Mallory GO, Haidu J B.Electroless Plating Fundamentals and Applications.Sponsored and Published byAESF.Orlando Florida [3] electroplating technology handbook. Beijing: National Defense Industry Press 2000)
The method of present domestic and international several magnesium of table 1 and magnesium alloy surface chemical oxidation
| Sequence number | The oxidation liquid formula | Processing condition | The rete color | Remarks | |||
| Component | Content (%) | ??pH | Temperature (℃) | Time (min) | |||
| ??1 | Potassium bichromate ammonium sulfate sodium sulfate | ??30～35 ??30～35 ??20～35 | ??4～5 | Boiling | ??20～30 | Coffee color～black | Solidity to corrosion is better |
| ??2 | Ammonium sulfate potassium bichromate chromic anhydride acetic acid | ??140～160 ??2～4 ??1～3 ??10～20 | ??80～90 | ??1～2 | Golden yellow～dark-brown | Solidity to corrosion is relatively poor | |
| ??3 | Potassium bichromate ammonium sulfate sal epsom manganous sulfate | ??30～40 ??25～45 ??10～20 ??7～10 | ??3～4 | Boiling | ??20～30 | Dark-brown～black | Solidity to corrosion is better |
| ??4 | Sodium dichromate 99 chromic anhydride sal epsom manganous sulfate | ??110～170 ??1～3 ??40～75 ??7～10 | ??2～4 | Boiling | ??15～25 | Aterrimus | The same |
| ??5 | Potassium alum potassium bichromate acetic acid | ??10～12 ??45～65 ??8～10 | ??30～45 | ??5～10 | Golden yellow～brown | The same | |
Continuous table 1
| Sequence number | The oxidation liquid formula | Processing condition | The rete color | Remarks | |||
| Component | Content (%) | ????pH | Temperature (℃) | Time (min) | |||
| ??6 | Nitric acid potassium bichromate sodium-chlor | ??90～100 ??55～65 ??1～5 | ??80～90 | ??1～2 | Straw yellow～brown | The rete protective is poor | |
| ??7 | Sodium Fluoride | ??30～50 | ??35～45 | ??20～25 | Grey～brown | The same | |
| ??8 | The selenous acid sodium dichromate 99 | ??20～25 ??10～12 | ??25～30 | ??1～3 | Yellow | The same | |
| ??9 | Sodium dichromate 99 chromic anhydride magnesium oxide sulfuric acid | ??12～24 ??40～45 ??7～9 ??1～2 | Room temperature | ??1 | Yellow | The same | |
Above-mentioned chemical oxidization method processing magnesium and Mg alloy surface can obtain the thin film layer of 0.5～2.5 μ m, and this rete is thin and soft, can only can not use separately as middle operation, so all will carry out application or be sprayed with organic coating.
Summary of the invention
The problem that exists at present magnesium and magnesium alloy surface treatment especially chemical oxidization method, the invention provides and a kind ofly exempt from application and make magnesium and magnesium alloy have ornamental chemical oxidation method, improve the bonding force of chemical oxide film and matrix, reduce the voidage of chemical oxide film, the solidity to corrosion of raising chemical oxide film, ornamental, and further reach the purpose of expanding magnesium and magnesium alloy Application Areas.
Magnesium of the present invention and magnesium alloy surface chemical oxidation treatment method comprise processing steps such as dehydrogenation, electrochemical deoiling, washing, bright dipping, chemical oxidation.
1, dehydrogenation.Foundry goods is put into resistance furnace, and controlled temperature is 160～200 ℃, and insulation 1～2h carries out dehydrogenation and handles.
2, electrochemical deoiling.At first prepare the electrochemical deoiling agent, it is as follows to fill a prescription:
| Component | Content (g/L) |
| Trisodium phosphate (saponification) sodium phosphate (detergency, huge legendary turtle are closed, emulsification) tripoly phosphate sodium STPP (softening water, antiscale) emulsifying agent (wetting, infiltration, rolling off) polyethers 2070 deionized waters | 16～23 12～16 6～8 1～3 surpluses |
Component beyond the above-mentioned deionized water is dissolved in respectively in the deionized water by formula rate, the mixed aqueous solution that gets, stand-by in the groove of packing into.Pending magnesium or Mg alloy castings are soaked in the above-mentioned aqueous solution, keep 55～60 ℃ of solution temperatures, immersion treatment 8～10 minutes.
3, hot water wash.Above-mentioned foundry goods through electrochemical deoiling immersed in 55～65 ℃ the hot water (deionized water) immersion treatment 3～5 minutes.
4, cold wash.With above-mentioned foundry goods through hot water wash at room temperature, with mobile washed with de-ionized water 1～6 minute.
5, bright dipping.At first prepare light-emitting solution, it is as follows to fill a prescription:
| Component | Content (ml/L) |
| Phosphoric acid acetic acid chromic anhydride inhibiter deionized water | 80～90 35～40 10～12 2～5 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix light-emitting solution, stand-by in the groove of packing into.Above-mentioned foundry goods through cold water flush is immersed in the light-emitting solution, and at room temperature immersion treatment is 1～3 minute.
6, cold wash.Processing condition and working method are with step 4.
7, chemical oxidation.Its chemical oxidation liquid formula is: the adjacent dicarboxylic acid anhydride 12～19g/L of methyl tetrahydroxy or the adjacent dicarboxylic acid anhydride 12～19g/L of methyl tetrahydroxy and two sulphur, two propane sulfonic acid esters, 3～8g/L, vitriolate of tartar or Burow Solution 4～18g/L, boric acid 4～5g/L, potassium bichromate or sodium dichromate 99 or tripoly phosphate sodium STPP or S-WAT 0.5～6g/L, ammonium molybdate or Secondary ammonium phosphate 1～10g/L, nickel ammonium sulfate 1～3g/L, surplus is a deionized water.Component beyond the deionized water is promptly got chemical oxidation liquid with deionized water dissolving, mixing respectively.Foundry goods is immersed in the oxidation liquid, controlled temperature, pH value and time, carry out chemical oxidation treatment.Right air drying cleaned 1～6 minute with 55～65 ℃ hot water (deionized water) after the several seconds.
The preparation and the oxidizing process of chemical oxidation liquid of the present invention are workable, and those of ordinary skill in the art can realize; Chemical oxide film among the present invention and matrix bond are good, thermal shock 273 hours, surperficial no change; The extremely low or tight of the voidage of chemical oxide film; The solidity to corrosion of chemical oxide film is good, meets or exceeds the application level, and erosion rate is less than or equal to 3.379mm/a; Chemical oxide film can be coffee color, deep green, black, faint yellow, yellow, pink, dusty blue, reddish-brown, brown, black, and color is various, has improved ornamental; Chemical oxide film is exempted from application, has saved operation.The present invention has expanded magnesium and Application of Magnesium field, makes magnesium and magnesium alloy except can be used for aerospace field, also can be used for industries such as electronics, communication, automobile, building.
Embodiment
Embodiment 1
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
1, dehydrogenation.Foundry goods is put into resistance furnace, and controlled temperature is 180 ℃, and insulation 2h carries out dehydrogenation and handles.
2, electrochemical deoiling.At first prepare the electrochemical deoiling agent, it is as follows to fill a prescription:
| Component | Content (g/L) |
| Trisodium phosphate (saponification) sodium phosphate (detergency, huge legendary turtle are closed, emulsification) tripoly phosphate sodium STPP (softening water, antiscale) emulsifying agent (wetting, infiltration, rolling off) polyethers 2070 deionized waters | 20 14 72 surpluses |
Component beyond the above-mentioned deionized water is dissolved in respectively in the deionized water by formula rate, the mixed aqueous solution that gets, stand-by in the groove of packing into.
Pending Mg alloy castings is soaked in the above-mentioned aqueous solution, keeps 58 ℃ of solution temperatures, immersion treatment 9 minutes.
3, hot water wash.Above-mentioned foundry goods through electrochemical deoiling immersed in 60 ℃ the hot water (deionized water) immersion treatment 4 minutes.
4, cold wash.With above-mentioned foundry goods through hot water wash at room temperature, with mobile washed with de-ionized water 3 minutes.
5, bright dipping.At first prepare light-emitting solution, it is as follows to fill a prescription:
| Component | Content (ml/L) |
| Phosphoric acid acetic acid chromic anhydride inhibiter deionized water | 85 38 11 3 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix light-emitting solution, stand-by in the groove of packing into.Above-mentioned foundry goods through cold water flush is immersed in the light-emitting solution, and at room temperature immersion treatment is 2 minutes.
6, cold wash.Processing condition and working method are with step 4.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| The adjacent dicarboxylic acid anhydride vitriolate of tartar of methyl tetrahydroxy boric acid potassium bichromate ammonium molybdate deionized water | 15 16.5 4.5 46 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 85 ℃, carries out chemical oxidation treatment 25 minutes.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.The pH value of regulating oxidation liquid with sulfuric acid and ammoniacal liquor in the oxidising process, control pH value is 4.7～3.8, the rete color of gained is a deep green.
Embodiment 2
It is stand-by to get 100 * 100 * 5mm magnesium foundry goods.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| The adjacent dicarboxylic acid anhydride vitriolate of tartar of methyl tetrahydroxy boric acid potassium bichromate ammonium molybdate deionized water | 12 15 438 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 90 ℃, carries out chemical oxidation treatment 30 minutes.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.The pH value of regulating oxidation liquid with sulfuric acid and ammoniacal liquor in the oxidising process, control pH value is 5.5～4.7, the rete color of gained is coffee-like.
Embodiment 3
It is stand-by to get 100 * 100 * 5mm magnesium foundry goods.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| The adjacent dicarboxylic acid anhydride vitriolate of tartar of methyl tetrahydroxy boric acid potassium bichromate ammonium molybdate deionized water | 19 18 565 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 80 ℃, carries out chemical oxidation treatment 20 minutes.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.The pH value of regulating oxidation liquid with sulfuric acid and ammoniacal liquor in the oxidising process, control pH value is 3.8～3.5, the rete color of gained is a black.
Embodiment 4
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| The adjacent dicarboxylic acid anhydride vitriolate of tartar of methyl tetrahydroxy chromic acid sodium Secondary ammonium phosphate tripoly phosphate sodium STPP deionized water | 15 3.5 762 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 80 ℃, and the pH value is 2, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Controlling different oxidization times is 1 minute, and the gained rete is yellow.
Embodiment 5
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| The adjacent dicarboxylic acid anhydride vitriolate of tartar of methyl tetrahydroxy chromic acid sodium Secondary ammonium phosphate tripoly phosphate sodium STPP deionized water | 12 2533 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 85 ℃, and the pH value is 1.5, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Oxidization time 0.5 minute, the rete color even of gained is for faint yellow.
Embodiment 6
It is stand-by to get 100 * 100 * 5mm magnesium foundry goods.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| The adjacent dicarboxylic acid anhydride vitriolate of tartar of methyl tetrahydroxy chromic acid sodium Secondary ammonium phosphate tripoly phosphate sodium STPP deionized water | 19 59 10 1 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 75 ℃, and the pH value is 4, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Oxidization time 1.5 minutes, the rete color of gained are yellow.
Embodiment 7
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| Adjacent dicarboxylic acid anhydride two sulphur of methyl tetrahydroxy two propane sulfonic acid ester Burow Solution potassium bichromate nickel ammonium sulfate deionized waters | 15 7.5 4 3.5 2 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 88 ℃, 3 minutes time, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Control pH value is 1.5 in the oxidising process, and the rete color of gained is pink.
Embodiment 8
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| Adjacent dicarboxylic acid anhydride two sulphur of methyl tetrahydroxy two propane sulfonic acid ester Burow Solution potassium bichromate | ????12 ????7 ????4 ????2 |
| The nickel ammonium sulfate deionized water | 3 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 90 ℃, 4 minutes time, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Control pH value is 2 in the oxidising process, and the rete color of gained is pink.
Embodiment 9
It is stand-by to get 100 * 100 * 5mm magnesium foundry goods.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| Adjacent dicarboxylic acid anhydride two sulphur of methyl tetrahydroxy two propane sulfonic acid ester Burow Solution potassium bichromate nickel ammonium sulfate deionized waters | 19 8451 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 85 ℃, 1 minute time, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Control pH value is 4.6 in the oxidising process, and the rete color of gained is that ash is blue.
Embodiment 10
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| Adjacent dicarboxylic acid anhydride two sulphur of methyl tetrahydroxy two propane sulfonic acid ester S-WAT potassium bichromate ammonium aluminate deionized waters | 15 4 1.5 0.8 3 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 75 ℃, 4 minutes time, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Control pH value is 1.5 in the oxidising process, and the rete color of gained is a reddish-brown.
Embodiment 11
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| Adjacent dicarboxylic acid anhydride two sulphur of methyl tetrahydroxy two propane sulfonic acid ester S-WAT potassium bichromate ammonium molybdate deionized waters | 12 31 0.5 6 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 85 ℃, 5 minutes time, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Control pH value is 2 in the oxidising process, and the rete color of gained is a brown.
Embodiment 12
It is stand-by to get 100 * 100 * 5mm Mg alloy castings.
Step 1～6 are with embodiment 1.
7, chemical oxidation.At first prepare chemical oxidation liquid.It is as follows to fill a prescription:
| Component | Content (g/L) |
| Adjacent dicarboxylic acid anhydride two sulphur of methyl tetrahydroxy two propane sulfonic acid ester S-WAT potassium bichromate ammonium molybdate deionized waters | 19 5211 surpluses |
Component beyond the above-mentioned deionized water is pressed formula rate respectively with deionized water dissolving, mix chemical oxidation liquid.Foundry goods is immersed in the oxidation liquid, and controlled temperature is 70 ℃, 3 minutes time, carries out chemical oxidation treatment.Air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water (deionized water) again.Control pH value is 3.5 in the oxidising process, and the rete color of gained is a black.
Claims (10)
1, a kind of magnesium and magnesium alloy chemical method for oxidation, it is characterized in that chemical oxidation comprises dehydrogenation, electrochemical deoiling, hot water wash, cold wash, bright dipping, cold wash, the chemical oxidation process step, its chemical oxidation liquid formula is: the adjacent dicarboxylic acid anhydride 12～19g/L of methyl tetrahydroxy or the adjacent dicarboxylic acid anhydride 12～19g/L of methyl tetrahydroxy and two sulphur, two propane sulfonic acid esters, 3～8g/L, vitriolate of tartar or Burow Solution 4～18g/L, boric acid 4～5g/L, dichromic acid clock or sodium dichromate 99 or tripoly phosphate sodium STPP or S-WAT 0.5～6g/L, ammonium molybdate or Secondary ammonium phosphate 1～10g/L, nickel ammonium sulfate 1～3g/L, surplus is a deionized water.
2, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that described chemical oxidation step is that the foundry goods that will handle through abovementioned steps immerses in the oxidation liquid, controlled temperature, pH value and time, carry out oxide treatment,, cleaned 1～6 minute after the several seconds at air drying then with 55～65 ℃ of hot water.
3, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that the chemical oxidation fluid component of preparing is: the adjacent dicarboxylic acid anhydride 15g/L of methyl tetrahydroxy, vitriolate of tartar 16.5g/L, boric acid 4.5g/L, potassium bichromate 4g/L, ammonium molybdate 6g/L, surplus is a deionized water, to immerse in the oxidation liquid through the foundry goods that preceding step was handled, controlled temperature is 85 ℃, carries out chemical oxidation treatment 25 minutes, at air drying after the several seconds, cleaned 3 minutes with 60 ℃ hot water, the pH value with sulfuric acid and ammoniacal liquor adjusting controlled oxidation liquid in oxidising process is 4.7～3.8, and gained rete color is a deep green.
4, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that in the chemical oxidation liquid of foundry goods immersion by following formulated: the adjacent dicarboxylic acid anhydride 12g/L of methyl tetrahydroxy, vitriolate of tartar 15g/L, boric acid 4g/L, potassium bichromate 3g/L, ammonium molybdate 8g/L, surplus is a deionized water, controlled temperature is 90 ℃, carries out chemical oxidation treatment 30 minutes, then the air drying several seconds, cleaned 3 minutes with 60 ℃ hot water again, the pH value of regulating oxidation liquid with sulfuric acid and ammoniacal liquor in the oxidising process, control pH value is 5.5～4.7, the rete color of gained is coffee-like.
5, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that in the chemical oxidation liquid of foundry goods immersion by following formulated: the adjacent dicarboxylic acid anhydride 19g/L of methyl tetrahydroxy, vitriolate of tartar 18g/L, boric acid 5g/L, potassium bichromate 6g/L, ammonium molybdate 5g/L, surplus is a deionized water, and controlled temperature is 80 ℃, carries out chemical oxidation treatment 20 minutes, air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water again.The pH value of regulating oxidation liquid with sulfuric acid and ammoniacal liquor in the oxidising process, control pH value is 3.8～3.5, the rete color of gained is a black.
6, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that in the chemical oxidation liquid of foundry goods immersion by following formulated: the adjacent dicarboxylic acid anhydride 15g/L of methyl tetrahydroxy, vitriolate of tartar 3.5g/L, Sodium chromate 7g/L, Secondary ammonium phosphate 6g/L, tripoly phosphate sodium STPP 2g/L, surplus is a deionized water, controlled temperature is 80 ℃, and the pH value is 2, carries out chemical oxidation treatment, air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water, the controlled oxidation time is 1 minute again, and the gained rete be a yellow.
7, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that in the chemical oxidation liquid of foundry goods immersion by following formulated: the adjacent dicarboxylic acid anhydride 12g/L of methyl tetrahydroxy, vitriolate of tartar 2g/L, Sodium chromate 5g/L, Secondary ammonium phosphate 3g/L, tripoly phosphate sodium STPP 3g/L, surplus is a deionized water, controlled temperature is 85 ℃, and the pH value is 1.5, carries out chemical oxidation treatment, air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water again, oxidization time 0.5 minute, the rete color of gained is faint yellow.
8, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that in the chemical oxidation liquid of foundry goods immersion by following formulated: the adjacent dicarboxylic acid anhydride 15g/L of methyl tetrahydroxy, two sulphur, two propane sulfonic acid ester 7.5g/L, Burow Solution 4g/L, potassium bichromate 3.5g/L, nickel ammonium sulfate 2g/L, surplus is a deionized water, controlled temperature is 88 ℃, 3 minutes time, carries out chemical oxidation treatment, air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water, control pH value is 1.5 in the oxidising process again, and the rete color of gained is pink.
9, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that in the chemical oxidation liquid of foundry goods immersion by following formulated: the adjacent dicarboxylic acid anhydride 19g/L of methyl tetrahydroxy, two sulphur, two propane sulfonic acid ester 8g/L, Burow Solution 4g/L, potassium bichromate 5g/L, nickel ammonium sulfate 1g/L, surplus is a deionized water, controlled temperature is 85 ℃, 1 minute time, carries out chemical oxidation treatment, air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water, control pH value is 4.6 in the oxidising process again, and the rete color of gained be grey indigo plant.
10, according to described magnesium of claim 1 and magnesium alloy chemical method for oxidation, it is characterized in that in the chemical oxidation liquid of foundry goods immersion by following formulated: the adjacent dicarboxylic acid anhydride 15g/L of methyl tetrahydroxy, two sulphur, two propane sulfonic acid ester 4g/L, S-WAT 1.5g/, L potassium bichromate 0.8g/L, ammonium molybdate 3g/L, surplus is a deionized water, controlled temperature is 75 ℃, 4 minutes time, carries out chemical oxidation treatment, air drying several seconds then, cleaned 3 minutes with 60 ℃ hot water, control pH value is 1.5 in the oxidising process again, and the rete color of gained is a reddish-brown.
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| CN102226277A (en) * | 2011-06-10 | 2011-10-26 | 江西昌河航空工业有限公司 | Magnesium alloy chemical oxidation method |
| CN105755455A (en) * | 2016-03-22 | 2016-07-13 | 博罗县东明化工有限公司 | Magnesium alloy AZ31 blackening liquid and blackening method |
| 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 |
| CN109554697A (en) * | 2018-12-11 | 2019-04-02 | 陕西宏远航空锻造有限责任公司 | A kind of magnesium alloy forging surface chemistry oxidation solution and method |
| 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 |
| CN109628918A (en) * | 2019-02-25 | 2019-04-16 | 苏州长风航空电子有限公司 | A kind of color chemical oxidation technique of magnesium alloy |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5226976A (en) * | 1991-04-15 | 1993-07-13 | Henkel Corporation | Metal treatment |
| ES2106330T3 (en) * | 1992-04-01 | 1997-11-01 | Henkel Corp | METAL TREATMENT PROCEDURE. |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154637A (en) * | 2011-05-18 | 2011-08-17 | 沈阳工业大学 | Surface treatment method for magnesium alloy |
| CN102226277A (en) * | 2011-06-10 | 2011-10-26 | 江西昌河航空工业有限公司 | Magnesium alloy chemical oxidation method |
| CN105755455A (en) * | 2016-03-22 | 2016-07-13 | 博罗县东明化工有限公司 | Magnesium alloy AZ31 blackening liquid and blackening method |
| CN105755455B (en) * | 2016-03-22 | 2018-10-12 | 博罗县东明化工有限公司 | Magnesium alloy AZ31 hair blackening liquids and blackening method |
| 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 |
| CN109554697A (en) * | 2018-12-11 | 2019-04-02 | 陕西宏远航空锻造有限责任公司 | A kind of magnesium alloy forging surface chemistry oxidation solution and method |
| CN109628918A (en) * | 2019-02-25 | 2019-04-16 | 苏州长风航空电子有限公司 | A kind of color chemical oxidation technique of magnesium alloy |
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| Publication number | Publication date |
|---|---|
| CN100370061C (en) | 2008-02-20 |
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