CN102808122A - Process for manufacturing magnesium alloy sacrificial anode bar - Google Patents
Process for manufacturing magnesium alloy sacrificial anode bar Download PDFInfo
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- CN102808122A CN102808122A CN2012103101414A CN201210310141A CN102808122A CN 102808122 A CN102808122 A CN 102808122A CN 2012103101414 A CN2012103101414 A CN 2012103101414A CN 201210310141 A CN201210310141 A CN 201210310141A CN 102808122 A CN102808122 A CN 102808122A
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Abstract
The invention discloses a process for manufacturing a magnesium alloy sacrificial anode bar. The magnesium alloy sacrificial anode bar consists of the following chemical components in percentage by weight: 2.5 to 3.5 percent of Al, 0.6 to 1.4 percent of Zn, 0.2 to 1.0 percent of Mn, less than or equal to 0.003 percent of Fe, less than or equal to 0.01 percent of Cu, less than or equal to 0.001 percent of Ni, less than or equal to 0.08 percent of Si, and the balance of Mg. The current efficiency of the magnesium alloy sacrificial anode bar is more than or equal to 55 percent. The process has the advantages that the magnesium alloy sacrificial anode manufactured by the process is uniform in internal structure, high in current efficiency and low in production cost, the content of Fe impurity is extremely low, the corrosion products can fall off easily; and high surface dissolution uniformity can be achieved.
Description
Technical field
The present invention relates to galvanic protection sacrificial anode field, particularly a kind of sacrificial magnesium alloy anode bar ME.
Background technology
Galvanic protection is to prevent that electrochemical metal from corroding one of effective means.It applies certain cathodic current through the metal to protection, makes it produce cathodic polarization, and when a certain potential value was defeated by in the some position of metal, the corrosive anodic dissolution processes will be suppressed effectively.Mode according to cathodic current is provided is different, and galvanic protection is divided into two kinds of sacrificial anode protection and impressed current methods again.Sacrificial anode protection is that the metal or alloy that a kind of current potential is more negative is electrically connected with protecting metallic structures, and the continuous consumption dissolving through electronegative metals or alloy provides protective current to protected object, and metallic structures is protected.The impressed current Master is transformed into low-voltage DC with the external communication electricity; Through supplementary anode protective current is passed to protected metallic structures; Thereby corrosion is inhibited; System measures current potential and wave is fed back to potentiostat through reference electrode, with the adjusting outward current, thereby makes metallic structures be in the excellent protection state all the time.Because magnesium is a kind of sacrificial anode material commonly used in the electrochemical cathodic protection engineering, has higher chemically reactive.Its electropotential is more negative, and driving voltage is higher.Simultaneously, magnesium surface is difficult to form effective protective membrane.
Sacrificial magnesium alloy anode is one of important materials of metal being carried out electrochemical cathodic protection; It is widely used in the galvanic protection of metallic facility in the media such as water supply and sewage in soil, fresh water, seawater, the urban construction, coal gas, Sweet natural gas, heating, oil pipeline; Metal is played preservative activity, have broad application prospects.Magnesium alloy sacrificial anode material has high added value as another main deep processed product of magnesium.But at present the product of sacrificial magnesium alloy anode exist open circuit potential low, corrode uneven phenomenon, iron contamination content is higher, makes product quality and performances can not satisfy request for utilization.Therefore, invent a kind of novel magnesium alloy sacrificial anode material, this is for the class and the quality that improve the sacrificial anode product, and it is significant to enlarge the range of application of sacrificing positive product.
Summary of the invention
The objective of the invention is to provide a kind of sacrificial magnesium alloy anode bar, iron contamination content is few, current efficiency is high, corrosion is even, production cost is low.
For achieving the above object, technical scheme of the present invention is:
A kind of sacrificial magnesium alloy anode bar ME; Wherein the sacrificial magnesium alloy anode bar is made up of the chemical ingredients of following weight per-cent: Al 2.5～3.5%, Zn 0.6～1.4%, Mn 0.2～1.0%, Fe ≦ 0.003%, Cu ≦ 0.01%, Ni ≦ 0.001%, Si ≦ 0.08%; All the other are Mg, and the current efficiency of this sacrificial magnesium alloy anode bar is more than or equal to 55%.Its manufacturing technology steps is:
A. block-by-block adds crucible after magnesium ingot 90～97% being preheating to 150 ℃, carries out melting at 750～780 ℃ and obtains melt A;
B. temperature is remained on 750～780 ℃; Join after respectively Al 2.5～3.5%, Zn 0.6～1.4%, Mn 0.2～1.0%, Fe ≦ 0.003%, Cu ≦ 0.01%, Ni ≦ 0.001%, Si ≦ 0.08% being preheating to 150 ℃ and carry out refining among the liquation A, obtain melt B;
C. temperature is remained on 750～780 ℃, in melt B, add zirconium tetrachloride and carry out the deironing reaction;
D. temperature is remained on 750～780 ℃, in melt B, feed argon gas and stirred 10～15 minutes;
E. temperature is remained on 750～780 ℃, in melt B, add an amount of fining agent;
F. temperature is remained on 750～780 ℃, in melt B, feed argon gas and stirred 10～15 minutes;
G. temperature is remained on 750～780 ℃, melt B is left standstill carry out cast molding after 30～60 minutes.
Further, said step (c) reaction times is 10～15 minutes;
Further, the speed of said step (d) feeding argon gas is 10 cubes/minute.
The invention has the beneficial effects as follows: the sacrificial magnesium alloy anode that this technology is made, internal structure is even, and the content of iron contamination is extremely low, and current efficiency is high, and corrosion product comes off easily, and surface dissolution is even, and production cost is low.
Embodiment
Below in conjunction with embodiment the present invention is illustrated further, but do not limit the present invention with this.
Embodiment 1
Manufacturing technology steps of the present invention is following:
A. block-by-block adds crucible after magnesium ingot 95% being preheating to 150 ℃, carries out melting at 750～780 ℃ and obtains melt A;
B. temperature is remained on 770 ℃, join after respectively Al 3.0%, Zn 1.0%, Mn 0.8%, Fe ≦ 0.003%, Cu ≦ 0.01%, Ni ≦ 0.001%, Si ≦ 0.08% being preheating to 150 ℃ and carry out refining among the liquation A, obtain melt B;
C. temperature is remained on 770 ℃, in melt B, add zirconium tetrachloride and carry out the deironing reaction, the reaction times is 15 minutes;
D. temperature is remained on 770 ℃, in melt B, feed argon gas and stirred 12 minutes, the speed that feeds argon gas is 10 cubes/minute;
E. temperature is remained on 770 ℃, in melt B, add an amount of fining agent;
F. temperature is remained on 770 ℃, in melt B, feed argon gas and stirred 15 minutes, the speed that feeds argon gas is 10 cubes/minute;
G. temperature is remained on 770 ℃, melt B is left standstill carry out cast molding after 45 minutes.
Embodiment 2
Manufacturing technology steps of the present invention is following:
A. block-by-block adds crucible after magnesium ingot 97% being preheating to 150 ℃, carries out melting at 780 ℃ and obtains melt A;
B. temperature is remained on 780 ℃, join after respectively Al 2.5%, Zn 0.6%, Mn 0.2%, Fe ≦ 0.003%, Cu ≦ 0.01%, Ni ≦ 0.001%, Si ≦ 0.08% being preheating to 150 ℃ and carry out refining among the liquation A, obtain melt B;
C. temperature is remained on 780 ℃, in melt B, add zirconium tetrachloride and carry out the deironing reaction, the reaction times is 15 minutes;
D. temperature is remained on 780 ℃, in melt B, feed argon gas and stirred 10 minutes, the speed that feeds argon gas is 10 cubes/minute;
E. temperature is remained on 780 ℃, in melt B, add an amount of fining agent;
F. temperature is remained on 780 ℃, in melt B, feed argon gas and stirred 10 minutes, the speed that feeds argon gas is 10 cubes/minute;
G. temperature is remained on 780 ℃, melt B is left standstill carry out cast molding after 30 minutes.
Embodiment 3
Manufacturing technology steps of the present invention is following:
A. block-by-block adds crucible after magnesium ingot 90% being preheating to 150 ℃, carries out melting at 750 ℃ and obtains melt A;
B. temperature is remained on 750 ℃, join after respectively Al 3.5%, Zn 1.4%, Mn 1.0%, Fe ≦ 0.003%, Cu ≦ 0.01%, Ni ≦ 0.001%, Si ≦ 0.08% being preheating to 150 ℃ and carry out refining among the liquation A, obtain melt B;
C. temperature is remained on 750 ℃, in melt B, add zirconium tetrachloride and carry out the deironing reaction, the reaction times is 15 minutes;
D. temperature is remained on 750 ℃, in melt B, feed argon gas and stirred 15 minutes, the speed that feeds argon gas is 10 cubes/minute;
E. temperature is remained on 750 ℃, in melt B, add an amount of fining agent;
F. temperature is remained on 750 ℃, in melt B, feed argon gas and stirred 15 minutes, the speed that feeds argon gas is 10 cubes/minute;
G. temperature is remained on 750 ℃, melt B is left standstill carry out cast molding after 60 minutes.
Claims (3)
1. sacrificial magnesium alloy anode bar ME; It is characterized in that: described sacrificial magnesium alloy anode bar is made up of the chemical ingredients of following weight per-cent: Al 2.5～3.5%, Zn 0.6～1.4%, Mn 0.2～1.0%, Fe ≦ 0.003%, Cu ≦ 0.01%, Ni ≦ 0.001%, Si ≦ 0.08%; All the other are Mg, and the current efficiency of this sacrificial magnesium alloy anode bar is more than or equal to 55%.
2. its manufacturing technology steps is:
Block-by-block added crucible after magnesium ingot 90～97% was preheating to 150 ℃, carried out melting at 750～780 ℃ and obtained melt A;
Temperature is remained on 750～780 ℃; Join after respectively Al 2.5～3.5%, Zn 0.6～1.4%, Mn 0.2～1.0%, Fe ≦ 0.003%, Cu ≦ 0.01%, Ni ≦ 0.001%, Si ≦ 0.08% being preheating to 150 ℃ and carry out refining among the liquation A, obtain melt B;
Temperature is remained on 750～780 ℃, in melt B, add zirconium tetrachloride and carry out the deironing reaction;
Temperature is remained on 750～780 ℃, in melt B, feed argon gas and stirred 10～15 minutes;
Temperature is remained on 750～780 ℃, in melt B, add an amount of fining agent;
Temperature is remained on 750～780 ℃, in melt B, feed argon gas and stirred 10～15 minutes;
Temperature is remained on 750～780 ℃, melt B is left standstill carry out cast molding after 30～60 minutes.
3. sacrificial magnesium alloy anode bar ME according to claim 1 is characterized in that: said step (c) reaction times is 10～15 minutes;
Sacrificial magnesium alloy anode bar ME according to claim 1 is characterized in that: the speed that said step (d) feeds argon gas is 10 cubes/minute.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562045A (en) * | 2013-10-15 | 2015-04-29 | 张万友 | Novel high-performance magnesium alloy galvanic anode material |
| CN105648294A (en) * | 2016-04-12 | 2016-06-08 | 洛阳理工学院 | Nd-containing magnesium alloy sacrificial anode material |
| CN105671557A (en) * | 2016-04-12 | 2016-06-15 | 洛阳理工学院 | Bi containing magnesium alloy sacrificial anode material |
| CN105734375A (en) * | 2016-04-12 | 2016-07-06 | 洛阳理工学院 | Sb-containing magnesium alloy sacrificial anode material |
| CN105803465A (en) * | 2016-04-12 | 2016-07-27 | 洛阳理工学院 | Sacrificial anode material containing Sm-Mg alloy |
| CN105838951A (en) * | 2016-05-25 | 2016-08-10 | 河南科技大学 | La-containing magnesium alloy for sacrificial anode |
| CN107058833A (en) * | 2016-11-08 | 2017-08-18 | 中航装甲科技有限公司 | A kind of graphene composite armour material and preparation method thereof |
| CN107385248A (en) * | 2017-07-27 | 2017-11-24 | 河南明镁镁业科技有限公司 | A kind of production method of environment-friendly and energy-efficient high finished product rate high potential casting magnesium anode |
| CN107868921A (en) * | 2017-09-30 | 2018-04-03 | 广东工业大学 | A kind of magnesium alloy anode rolled plate and its preparation method and application |
| CN109943852A (en) * | 2019-05-10 | 2019-06-28 | 光钰科技（临沂）有限公司 | A kind of preparation method delaying sacrificial magnesium alloy anode corrosion rate |
| CN113186534A (en) * | 2021-04-30 | 2021-07-30 | 山西银光华盛镁业股份有限公司 | Rapid determination method for current efficiency of Mg-Mn sacrificial anode material |
| CN113930650A (en) * | 2021-10-25 | 2022-01-14 | 芜湖美的厨卫电器制造有限公司 | Sn-containing magnesium alloy sacrificial anode and preparation method and application thereof |
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| CN101638786A (en) * | 2008-07-29 | 2010-02-03 | 维恩克（鹤壁）镁基材料有限公司 | High-potential sacrificial magnesium alloy anode and manufacturing method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562045A (en) * | 2013-10-15 | 2015-04-29 | 张万友 | Novel high-performance magnesium alloy galvanic anode material |
| CN105734375B (en) * | 2016-04-12 | 2018-02-23 | 洛阳理工学院 | A kind of magnesium alloy sacrificial anode material containing Sb |
| CN105671557B (en) * | 2016-04-12 | 2018-02-23 | 洛阳理工学院 | A kind of magnesium alloy sacrificial anode material containing Bi |
| CN105734375A (en) * | 2016-04-12 | 2016-07-06 | 洛阳理工学院 | Sb-containing magnesium alloy sacrificial anode material |
| CN105803465A (en) * | 2016-04-12 | 2016-07-27 | 洛阳理工学院 | Sacrificial anode material containing Sm-Mg alloy |
| CN105671557A (en) * | 2016-04-12 | 2016-06-15 | 洛阳理工学院 | Bi containing magnesium alloy sacrificial anode material |
| CN105803465B (en) * | 2016-04-12 | 2018-02-23 | 洛阳理工学院 | A kind of magnesium alloy sacrificial anode material containing Sm |
| CN105648294A (en) * | 2016-04-12 | 2016-06-08 | 洛阳理工学院 | Nd-containing magnesium alloy sacrificial anode material |
| CN105838951A (en) * | 2016-05-25 | 2016-08-10 | 河南科技大学 | La-containing magnesium alloy for sacrificial anode |
| CN107058833A (en) * | 2016-11-08 | 2017-08-18 | 中航装甲科技有限公司 | A kind of graphene composite armour material and preparation method thereof |
| CN107385248A (en) * | 2017-07-27 | 2017-11-24 | 河南明镁镁业科技有限公司 | A kind of production method of environment-friendly and energy-efficient high finished product rate high potential casting magnesium anode |
| CN107868921A (en) * | 2017-09-30 | 2018-04-03 | 广东工业大学 | A kind of magnesium alloy anode rolled plate and its preparation method and application |
| CN109943852A (en) * | 2019-05-10 | 2019-06-28 | 光钰科技（临沂）有限公司 | A kind of preparation method delaying sacrificial magnesium alloy anode corrosion rate |
| CN113186534A (en) * | 2021-04-30 | 2021-07-30 | 山西银光华盛镁业股份有限公司 | Rapid determination method for current efficiency of Mg-Mn sacrificial anode material |
| CN113930650A (en) * | 2021-10-25 | 2022-01-14 | 芜湖美的厨卫电器制造有限公司 | Sn-containing magnesium alloy sacrificial anode and preparation method and application thereof |
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