CN109913724A - Containing anti-corrosion Mg-Gd-Y system alloy of As and preparation method thereof - Google Patents
Containing anti-corrosion Mg-Gd-Y system alloy of As and preparation method thereof Download PDFInfo
- Publication number
- CN109913724A CN109913724A CN201910204610.6A CN201910204610A CN109913724A CN 109913724 A CN109913724 A CN 109913724A CN 201910204610 A CN201910204610 A CN 201910204610A CN 109913724 A CN109913724 A CN 109913724A
- Authority
- CN
- China
- Prior art keywords
- alloy
- corrosion
- arsenic
- preparation
- magnesium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The present invention provides one kind containing anti-corrosion Mg-Gd-Y system alloy of As and preparation method thereof, the component and its weight percent of the anti-corrosion Mg-Gd-Y system alloy containing As are as follows: 5.0~11.0wt%Gd, 2.0~5.0wt%Y, 0.01~3.0wt%As, the total amount of impurity element S i, Fe, Cu, Ni etc. are surplus less than 0.3%, Mg.Add Y and Gd when melting into Serum Magnesium in the form of Mg-Gd, Mg-Y intermediate alloy respectively.Alloy addition element As of the invention, can significantly improve the corrosion resistance of Mg-Gd-Y system alloy, have excellent performance.
Description
Technical field
The present invention relates to class of metal materials field and field of metallurgy, and in particular, to one kind is closed containing the anti-corrosion Mg-Gd-Y system of As
Gold and preparation method thereof, such Mg-Gd-Y system alloy produced by the present invention have good corrosion resisting property.
Background technique
Magnesium alloy has high specific strength, specific stiffness, than elasticity modulus, Yi Jiliang as most light engineering metal material
Castability well, machinability also have good thermal conductivity, resistance damping properties, and have electromagnetic shielding capability by force and be easy to
The series of advantages such as recycling, thus magnesium alloy is that production spacecraft, military aircraft, guided missile, high maneuverability energy battlebus etc. must can not
The ideal material of the product casings such as few structural material and traffic, electronic information, communication, computer, so magnesium alloy has
Boundless market prospects.
But magnesium is metal most active in engineer application, standard electrode potential is all lower than iron, aluminium, zinc, copper etc., and
Its surface film oxide is loose porous, therefore the corrosion resistance of magnesium-rare earth is lower.Magnesium alloy is equal in wet air or aqueous solution
It can hinder magnesium-alloy material by serious electrochemical corrosion and play its advantage in the application, limit the use of magnesium alloy
Range.
Magnesium-rare earth has broad application prospects as a kind of high-strength heat-resistant magnesium alloy in aerospace field.It is dilute
Earth elements have solution strengthening and precipitation enhancement, can improve the drawing by high temperature and croop property of magnesium alloy, in addition there are
Dehydrogenation dehydrogenation improves the effects of casting character, moreover, China possesses rare earth resources abundant, so exploitation magnesium-rare earth has
Significance.Research is concentrated mainly on Mg-Gd, Mg-Y, Mg-Gd-Y, Mg-Y-Gd, Mg-Y-Sm, Mg-Gd-Nd, Mg-Nd- at present
[Wu Yujuan, Ding Wenjiang, Peng Liming wait progress [J] of High-performance Magnesium Rare-earth Alloys to the alloy systems such as Zn, Mg-Gd-Y-Zn
Chinese material progress, 2011,30 (2): 1-9.].But research in relation to magnesium-rare earth is more to concentrate on microstructure and power
It learns in performance, the research in terms of corrosion behavior is relatively fewer.It is answered while magnesium-rare earth reaches high-strength and high ductility heat resistance
Its corrosion resistance is further paid close attention to, is that alloy has extremely important reference value to the popularization of more areas for this.In rare earth magnesium
The concern that Mg-Gd-Y system alloy is subject in alloy is most, research it is most wide, but have not yet to see related in Mg-Gd-Y system
The report that As member usually improves its corrosion resisting property is added in alloy.
As, a kind of metalloid element are located at the 4th period, V A race, elemental arsenic fusing point 817 in the periodic table of chemical element
DEG C (28 atmospheric pressure).As element widely exists in nature, shares hundreds of arsenic minerals and has been found.Arsenic makees alloy addition
Produce lead bullet, type metal, brass, antifriction alloy, high strength construction steel and corrosion-resisting steel etc..Arsenic addition can be in copper, steel
Enhance its corrosion resistance [distribution and its control [J] the Hunan's nonferrous metals of Yi Kejun arsenic in Copper making process, 2001,17 (z1):
1-2.].Nick Birbilis team, Monash University has been found that adds a small amount of As element in pure magnesium, can
Effectively to hinder corrosion reaction [Birbilis N, Williams G, Gusieva by Poisoning cathode before corrosion reaction occurs
K,et al.Poisoning the corrosion of magnesium[J].Electrochemistry
Communications,2013,34:295-298.].But team prepares magnesium that arsenic alloy link is various, high production cost
It is high, it is unfavorable for the extensive use of alloy, and As is added in Mg-Gd-Y system alloy to the shadow of its corrosive nature without studying
It rings.Thus, it is necessary to develop, corrosion resistance is good, the low anti-corrosion Mg-Gd-Y system alloy containing As of production cost.
Rare earth element progress alloying is added in pure magnesium to be conducive to improve the comprehensive performances such as the intensity of magnesium, compared to purer
Magnesium, Mg-Gd-Y system magnesium alloy have wider application.Due to there are arsenic yttrium mine and gadolinium thorium oxygen iron arsenic high-temperature superconducting material, that
As element may also react with Gd, Y etc. in Mg-Gd-Y system magnesium alloy, so corrosion mechanism may change.By
It will form micro anode in (MgGdY) second phase and preferentially corrode [J.Liu, Y.Song, J.Chen, P.Chen, D.Shan, E.-
H.Han,The Special Role of Anodic Second Phases in the Micro-galvanic
189 (2016) 190-195. of Corrosion of EW75Mg Alloy, Electrochim.Acta], after As element is added, As
It is combined with Y element or Gd element, then the corrosion resistance of the second phase will be influenced, to influence corrosion process, and As is in α-Mg
Cathode in matrix poisons obstruction evolving hydrogen reaction, and corrosion resistance can be improved.Therefore, corruption of the As element in Mg-Gd-Y system alloy
Erosion mechanism is different from the corrosion resistance mechanism in pure magnesium.In addition to this, Fe-riched phase is to constitute main cathode on Mg or Mg alloy again
Reaction center, even if Fe content is very low, still very big [J.A.Boyer, The the corrosion of of the influence to corrosion
magnesium and of the magnesium aluminum alloys containing manganese,Report-
248, American Magnesium Corporation, Niagara Falls, NY, USA, 1927.], therefore, reduces Fe and contain
The influence to corrosion is measured, and the problem of Mg-Gd-Y system alloy urgent need to resolve anti-corrosion containing arsenic.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide it is a kind of containing the anti-corrosion Mg-Gd-Y system alloy of As and its
Preparation method solves the problems such as Mg-Gd-Y system alloy corrosion resistance can be bad.Alloy is carried out by the way that a certain amount of As element is added
Change, modificationization processing, the corrosion resistance of Mg-Gd-Y system alloy can be made to significantly improve, meet the needs of light-alloy development, expand simultaneously
The big application range of magnesium alloy.
Change the phase structure in magnesium alloy by addition alloying element and reduces impurity element to the shadow of Corrosion Behaviors of Magnesium Alloys
It rings, is the important channel for solving corrosion stability of magnesium alloy difference to improve the corrosion resistance of magnesium alloy.It is developed by adding As alloying
Corrosion-resistant magnesium alloy can be widely used in the fields such as aerospace, automobile, electronics, have emphatically to the magnesium alloy industry in China
Big realistic meaning.
The purpose of the present invention is achieved through the following technical solutions:
In a first aspect, the present invention provides a kind of anti-corrosion Mg-Gd-Y system alloy containing arsenic, the alloy is grouped as by following group:
The total amount of 5.0~11.0wt%Gd, 2.0~5.0wt%Y, 0.01~3.0wt%As, impurity element S i, Fe, Cu, Ni etc. are less than
0.3%, Mg are surplus.Since the precipitating reinforcing effect of Mg-Gd-Y system alloy is better than most of magnesium-rare earth alloy, answer at present
Also than wide, research Mg-Gd-Y system alloy is more meaningful in field, and As is also possible to cooperate with Gd, Y element generation
Effect is conducive to improve corrosion resisting property.If As content is lower than 0.01wt%, it is unfavorable for studying influence of the As to alloy, Wu Fayou
Power excludes the influence of other factors, and content is too low, and the influence to alloy is also smaller；When As content is higher than 3%, crystalline substance will affect
Boundary's aggregation segregation, can also generate unfavorable phase, have detrimental effect for the corrosive nature of alloy.
Second aspect, the present invention provide a kind of preparation method of anti-corrosion Mg-Gd-Y system alloy containing arsenic, include the following steps:
S1, the pure magnesium of raw material, Mg-Gd intermediate alloy, Mg-Y intermediate alloy, pure arsenic or arsenide are stocked up according to the ratio；
The raw material and casting are preheated with mold；
S2, under protective gas will sequentially add Mg-Gd intermediate alloy, Mg-Y intermediate alloy after the fusing of pure magnesium, stir after fusing
It mixes uniformly；
S3, the pure arsenic or arsenide that are encased with aluminium foil are pressed into gained melt after step S2 processing with bell jar, completely
It is stirred evenly after fusing；
S4, gained melt will be refined, stood after step S3 processing, be then cast in mold to get.
Preferably, in step S1, the Mg-Gd intermediate alloy includes closing among the Mg-Gd containing 25.0~35.0wt%Gd
Gold；The Mg-Y intermediate alloy includes the Mg-Y intermediate alloy containing 25.0~35.0wt%Y.
Preferably, in step S1, the arsenide includes Mg3As2, at least one of AsY.
Preferably, in step S1, further include the steps that preheating the raw material and casting with mold；The preheating
Temperature is 180~200 DEG C.
Preferably, in step S2, the addition temperature of the Mg-Gd intermediate alloy and Mg-Y intermediate alloy is 700~750
℃。
Preferably, in step S3, the addition temperature of the pure arsenic or arsenide is 700~750 DEG C；
Preferably, in step S3, stirring stands heat preservation 10~20 minutes after the pure arsenic or arsenide addition.Due to pure arsenic
Or the fusing point of arsenide is high, can effectively melt pure arsenic or arsenide into matrix at this temperature 10~20 minutes.
Preferably, in step S4, the refining, the specific steps stood are as follows: at 730~770 DEG C, 2wt% is added
JDMJ refining agent, continuously stirs, and when temperature is up to 770~780 DEG C, skims dross on surface of fusant after standing 20~30 minutes.
JDMJ refining agent referring to Ding Wenjiang write " magnesium alloy science and technology " Science Press, 2007.01 the 1st editions, P48. table 2.9.
Preferably, in step S4, the temperature of the casting is 700~730 DEG C.The casting uses steel die.
Design philosophy of the invention is as follows:
The addition of arsenic is to inhibit liberation of hydrogen to act on by poisoning the main cathode center of magnesium alloy, and the second phase particles of Fu Tie are
Main evolving hydrogen reaction center on magnesium alloy.The dissolution for promoting cathode hydrogen evolution reaction to activate magnesium, the cathodes poison such as arsenic, antimony are crossed by Tie Tong
Object can have a great impact to evolving hydrogen reaction, because they can have an effect with iron or rich iron particle, reduce in hydrogen ion adsorption
The surface coverage of mesosome, to reduce the compound rate of hydrogen atom.And arsenic is strongest one kind in cathode poisonous substance, arsenic surface
Deposition can effectively prevent hydrogen atom compound.It is unique for inhibiting the method for corrosion by cathode poisonous substance, because in work
In journey metal, magnesium and magnesium alloy are a kind of unique metals of hydrogen evolution cathodic reaction due to water reduction.
And arsenic is cheap, develops the novel anti-corrosion Mg-Gd-Y system alloy containing As, the anti-corrosion of magnesium alloy not only can be improved
Property, and cost can be reduced.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, in magnesium alloy of the invention, addition As element post-etching rate is greatly lowered, and compares more traditional Mg-Gd-Y
It is alloy, corrosion resisting property is greatly improved.
2, cheap because As element widely exists in nature in the present invention, it is anti-corrosion to reduce development and production
The cost of Mg-Gd-Y system alloy.
3, in the present invention, the preparation method of the anti-corrosion Mg-Gd-Y system alloy containing As is simple, and production craft step is few, improves
The production efficiency of anti-corrosion Mg-Gd-Y alloy, convenient for being used widely.
4, in the present invention, inhibit cathode hydrogen evolution anti-using the principle for poisoning corroding cathode for the first time in Mg-Gd-Y system alloy
It answers, improves the corrosion resistance of Mg-Gd-Y system alloy, this principle can open up more thinkings for exploitation corrosion-resistant magnesium alloy.
5, it after the present invention encases pure arsenic or arsenide using aluminium foil, places into magnesium alloy fused mass, is introduced after aluminium foil fusing
Aluminium element can effective Refining Mg Alloy crystal grain, to improve the mechanical property of Mg-Gd-Y system alloy.
6, this seminar anti-corrosion Mg-Gd-Y system alloy smelting process containing As, acquisition by addition As element and optimization preparation
The anti-corrosion Mg-Gd-Y system alloy containing As that corrosion resistance is good, production cost is low, this has the application for expanding Mg-Gd-Y system alloy aobvious
The practical significance of work.
7, present invention selection method of smelting, since As is easy to combine with Fe, As and Fe is combined and is formed furnace during the preparation process
Slag claws, and content of the Fe element in Mg-Gd-Y system alloy can be effectively reduced, so that the corrosion resistance of alloy is improved, and
The report that As element is added in the magnesium alloy under such an approach is not seen still at present.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is that the surface in embodiment 1 and comparative example 1 after alloy immersion corrosion compares photo；
Fig. 2 is that the surface in embodiment 2 and comparative example 2 after alloy immersion corrosion compares photo；
Fig. 3 is that the surface in embodiment 3 and comparative example 3 after alloy immersion corrosion compares photo.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
Embodiment 1
Containing the anti-corrosion Mg-Gd-Y alloy of As: in the present embodiment, by the composition of the anti-corrosion Mg-Gd-Y alloy containing As and each
The weight percent of composition prepares raw material:
(1) prepare the Mg-Gd intermediate alloy for containing 25.0~35.0wt%Gd, among the Mg-Y containing 25.0~35.0wt%Y
Alloy, pure arsenic and pure magnesium；
(2) pure magnesium, intermediate alloy Mg-Gd, Mg-Y are preheating to 180 DEG C~200 DEG C, pure magnesium is then put into graphite crucible
Middle fusing, is passed through SF6And CO2Hybrid protection gas；
(3) after magnesium ingot fusing, when temperature reaches 700~750 DEG C, Mg-Gd binary intermediate alloy is added directly into
In pure magnesium through melting, stirred 1-2 minutes after it is completely melt；
(4) Mg-Y binary intermediate alloy is added when melt temperature goes back up to 700~750 DEG C, is stirred after it is completely melt
It mixes 1 minute；
(5) when temperature recovery is to 700~750 DEG C, bell jar, which is pushed down, after encasing pure arsenic with aluminium foil is put into melt, quiet after stirring
Set heat preservation 10 minutes；
(6) for furnace temperature at 730~770 DEG C, adding quality is alloy total weight 2wt%JDMJ refining agent, continuously stirs, fishes out bottom
It skims；
(7) when temperature is up to 770~780 DEG C, 20~30 minutes are stood, dross on surface of fusant is skimmed after standing to carry out
Casting, the steel die of casting are previously heated to 180~200 DEG C, and the temperature of casting is 700~730 DEG C, can obtain containing As
Anti-corrosion Mg-Gd-Y alloy.
Comparative example 1
Traditional Mg-Gd-Y alloy: in this comparative example, by the composition and each weight hundred that forms of the Mg-Gd-Y alloy
Divide than preparing raw material:
(1) prepare the Mg-Gd intermediate alloy for containing 25.0~35.0wt%Gd, among the Mg-Y containing 25.0~35.0wt%Y
Alloy and pure magnesium；
(2) pure magnesium, intermediate alloy Mg-Gd, Mg-Y are preheating to 180 DEG C~200 DEG C, pure magnesium is then put into graphite crucible
Middle fusing, is passed through SF6And CO2Hybrid protection gas；
(3) after magnesium ingot fusing, when temperature reaches 700~750 DEG C, Mg-Gd binary intermediate alloy is added directly into
In pure magnesium through melting, stirred 1-2 minutes after it is completely melt；
(4) Mg-Y binary intermediate alloy is added when melt temperature goes back up to 700~750 DEG C, is stirred after it is completely melt
It mixes 1 minute；
(5) furnace temperature adds 2wt%JDMJ refining agent, continuously stirs at 730~770 DEG C, and fishing bottom is skimmed；
(6) when temperature is up to 770~780 DEG C, 20~30 minutes are stood, dross on surface of fusant is skimmed after standing to carry out
Casting, the steel die of casting are previously heated to 180~200 DEG C, can obtain Mg-Gd-Y alloy.
1 is shown in Table through chemical analysis alloying component (wt%) such as following table, alloy corrosion performance.
Surface comparison diagram 1 after alloy immersion corrosion in embodiment 1 and comparative example 1 combines it can be seen from table 1 plus arsenic
Afterwards, arsenic-containing alloy remains unchanged bright by salt water immersion corrosion rear surface, and not arsenic-containing alloy as a comparison is impregnated by salt water
It is big to corrode rear surface corroded area, seriously corroded.After adding As, the corrosion rate of Mg-Gd-Y alloy reduces 5 times.
Embodiment 2
Containing the anti-corrosion Mg-Gd-Y alloy of As: in the present embodiment, by the composition of the anti-corrosion Mg-Gd-Y alloy containing As and each
The weight percent of composition prepares raw material:
(1) prepare the Mg-Gd intermediate alloy for containing 25.0~35.0wt%Gd, among the Mg-Y containing 25.0~35.0wt%Y
Alloy, magnesium arsenide and pure magnesium；
(2) pure magnesium, intermediate alloy Mg-Gd, Mg-Y are preheating to 180 DEG C~200 DEG C, pure magnesium is then put into graphite crucible
Middle fusing, is passed through SF6And CO2Hybrid protection gas；
(3) after magnesium ingot fusing, when temperature reaches 700~750 DEG C, Mg-Gd binary intermediate alloy is added directly into
In pure magnesium through melting, stirred 1-2 minutes after it is completely melt；
(4) Mg-Y binary intermediate alloy is added when melt temperature goes back up to 700~750 DEG C, is stirred after it is completely melt
It mixes 1 minute；
(5) when temperature recovery is to 700~750 DEG C, bell jar, which is pushed down, after encasing magnesium arsenide with aluminium foil is put into melt, after stirring
Stand heat preservation 10 minutes；
(6) for furnace temperature at 730~770 DEG C, adding quality is alloy total weight 2wt%JDMJ refining agent, continuously stirs, fishes out bottom
It skims；
(7) when temperature is up to 770~780 DEG C, 20~30 minutes are stood, dross on surface of fusant is skimmed after standing to carry out
Casting, the steel die of casting are previously heated to 180~200 DEG C, and the temperature of casting is 700~730 DEG C, can obtain containing As
Anti-corrosion Mg-Gd-Y alloy.
Comparative example 2
Traditional Mg-Gd-Y alloy: in this comparative example, by the composition and each weight hundred that forms of the Mg-Gd-Y alloy
Divide than preparing raw material:
(1) prepare the Mg-Gd intermediate alloy for containing 25.0~35.0wt%Gd, among the Mg-Y containing 25.0~35.0wt%Y
Alloy and pure magnesium；
(2) pure magnesium, intermediate alloy Mg-Gd, Mg-Y are preheating to 180 DEG C~200 DEG C, pure magnesium is then put into graphite crucible
Middle fusing, is passed through SF6And CO2Hybrid protection gas；
(3) after magnesium ingot fusing, when temperature reaches 700~750 DEG C, Mg-Gd binary intermediate alloy is added directly into
In pure magnesium through melting, stirred 1-2 minutes after it is completely melt；
(4) Mg-Y binary intermediate alloy is added when melt temperature goes back up to 700~750 DEG C, is stirred after it is completely melt
It mixes 1 minute；
(5) for furnace temperature at 730~770 DEG C, adding quality is alloy total weight 2wt%JDMJ refining agent, continuously stirs, fishes out bottom
It skims；
(6) when temperature is up to 770~780 DEG C, 20~30 minutes are stood, dross on surface of fusant is skimmed after standing to carry out
Casting, the steel die of casting are previously heated to 180~200 DEG C, and the temperature of casting is 700~730 DEG C, can obtain Mg-
Gd-Y alloy.
1 is shown in Table through chemical analysis alloying component (wt%) such as following table, alloy corrosion performance.
Surface comparison diagram 2 after alloy immersion corrosion in embodiment 2 and comparative example 2 combines it can be seen from table 1 plus arsenic
Afterwards, arsenic-containing alloy remains unchanged bright by salt water immersion corrosion rear surface, and not arsenic-containing alloy as a comparison is impregnated by salt water
It is big to corrode rear surface corroded area, seriously corroded.After adding As, the corrosion rate of Mg-Gd-Y alloy reduces 7 times.
Embodiment 3
Containing the anti-corrosion Mg-Gd-Y alloy of As: in the present embodiment, by the composition of the anti-corrosion Mg-Gd-Y alloy containing As and each
The weight percent of composition prepares raw material:
(1) prepare the Mg-Gd intermediate alloy for containing 25.0~35.0wt%Gd, among the Mg-Y containing 25.0~35.0wt%Y
Alloy, arsenic yttrium and pure magnesium；
(2) pure magnesium, intermediate alloy Mg-Gd, Mg-Y are preheating to 180 DEG C~200 DEG C, pure magnesium is then put into graphite crucible
Middle fusing, is passed through SF6And CO2Hybrid protection gas；
(3) after magnesium ingot fusing, when temperature reaches 700~750 DEG C, Mg-Gd binary intermediate alloy is added directly into
In pure magnesium through melting, stirred 1-2 minutes after it is completely melt；
(4) Mg-Y binary intermediate alloy is added when melt temperature goes back up to 700~750 DEG C, is stirred after it is completely melt
It mixes 1 minute；
(5) when temperature recovery is to 700~750 DEG C, bell jar, which is pushed down, after encasing arsenic yttrium with aluminium foil is put into melt, after stirring
Stand heat preservation 10 minutes；
(6) for furnace temperature at 730~770 DEG C, adding quality is alloy total weight 2wt%JDMJ refining agent, continuously stirs, fishes out bottom
It skims；
(7) when temperature is up to 770~780 DEG C, 20~30 minutes are stood, dross on surface of fusant is skimmed after standing to carry out
Casting, the steel die of casting are previously heated to 180~200 DEG C, and the temperature of casting is 700~730 DEG C, can obtain containing As
Anti-corrosion Mg-Gd-Y alloy.
Comparative example 3
Traditional Mg-Gd-Y alloy: in this comparative example, by the composition and each weight that forms of Mg-Gd-Y system alloy
Percentage prepares raw material:
(1) prepare the Mg-Gd intermediate alloy for containing 25.0~35.0wt%Gd, among the Mg-Y containing 25.0~35.0wt%Y
Alloy and pure magnesium；
(2) pure magnesium, intermediate alloy Mg-Gd, Mg-Y are preheating to 180 DEG C~200 DEG C, pure magnesium is then put into graphite crucible
Middle fusing, is passed through SF6And CO2Hybrid protection gas；
(3) after magnesium ingot fusing, when temperature reaches 700~750 DEG C, Mg-Gd binary intermediate alloy is added directly into
In pure magnesium through melting, stirred 1-2 minutes after it is completely melt；
(4) Mg-Y binary intermediate alloy is added when melt temperature goes back up to 700~750 DEG C, is stirred after it is completely melt
It mixes 1 minute；
(5) for furnace temperature at 730~770 DEG C, adding quality is alloy total weight 2wt%JDMJ refining agent, continuously stirs, fishes out bottom
It skims；
(6) when temperature is up to 770~780 DEG C, 20~30 minutes are stood, dross on surface of fusant is skimmed after standing to carry out
Casting, the steel die of casting are previously heated to 180~200 DEG C, and the temperature of casting is 700~730 DEG C, can obtain Mg-
Gd-Y alloy.
1 is shown in Table through chemical analysis alloying component (wt%) such as following table, alloy corrosion performance.
Surface comparison diagram 3 after alloy immersion corrosion in embodiment 3 and comparative example 3 combines it can be seen from table 1 plus arsenic
Afterwards, arsenic-containing alloy remains unchanged bright by salt water immersion corrosion rear surface, and not arsenic-containing alloy as a comparison is impregnated by salt water
It is big to corrode rear surface corroded area, seriously corroded.After adding As, the corrosion rate of Mg-Gd-Y system alloy reduces 6 times.
Corrosion test:
Experiment corrosive medium is 3.5wt%NaCl solution, and pH=7 is configured using pure NaCl is analyzed with distilled water.Test
In, it willSheet Mg-Gd-Y system alloy be polished to 7000# with abrasive paper for metallograph, be polished to 0.5mm.Sample is immersed
In dehydrated alcohol, ultrasonic cleaning after ten minutes, is dried up with cold wind.Then claimed with the electronic balance that precision is a ten thousandth gram
Amount, note sample original quality are W0.Every kind of alloy takes 4 parallel samples, is separately immersed in the burning for filling 3.5wt%NaCl solution
In cup.It takes out within soaking at room temperature 3 days.
In 35~45 DEG C of chromic acid (200g/LCrO3+10g/LAgNO3) cleaning 7min removing corrosion product, later with anhydrous
Ethyl alcohol cleaning, cold wind drying, then measured with electronic balance, quality is W after note is impregnated1.Corrosion rate is calculated with following formula
(mg/cm2/ d):
Corrosion rate Vcorr=(W0-W1)/(S*t)
W in formula0And W1It is the original quality before impregnating and the quality (mg) after 3 days impregnate respectively；S is sample immersion
Preceding original area (cm2)；T is soaking time (day).The corrosion rate experimental result of every kind of alloy is being averaged for 4 samples
Value.Table 1 is the embodiment of the present invention 1,2 and the corrosion rate that 3 alloy immersion tests measure.
Table 1
As it can be seen from table 1 since the addition of alloying element As is so that the corrosion rate of Mg-Gd-Y system alloy obviously drops
It is low, significantly improve the corrosion resistance of Mg-Gd-Y system alloy.
Embodiment the result shows that, alloy addition element As of the invention can significantly improve the anti-corrosion of Mg-Gd-Y system alloy
Performance.
Comparative example 4
This comparative example is related to one kind alloy of Mg-Gd-Y containing arsenic and preparation method thereof, the component of the alloy and containing for each group
It measures almost the same with embodiment 1, the difference is that only: obtaining alloying component in this comparative example as 5wt%Gd, 2wt%Y,
4wt%As, Mg are the alloy of surplus.
The preparation method and embodiment 1 of the alloy are consistent.
Surface after this comparative example alloy immersion corrosion are as follows: corroded area is big, seriously corroded；Corrosion rate are as follows: 3.6mg/
cm2/d。
Comparative example 5
This comparative example is related to one kind alloy of Mg-Gd-Y containing arsenic and preparation method thereof, the component of the alloy and containing for each group
It measures almost the same with embodiment 3, the difference is that only: obtaining alloying component in this comparative example as 12wt%Gd, 5wt%Y,
3wt%As, Mg are the alloy of surplus.
The preparation method and embodiment 3 of the alloy are consistent.
Surface after this comparative example alloy immersion corrosion are as follows: corroded area is big, seriously corroded；Corrosion rate are as follows: 2.3mg/
cm2/d。
Comparative example 6
This comparative example is related to one kind alloy of Mg-Gd-Yb containing arsenic and preparation method thereof, the component of the alloy and containing for each group
Amount is almost the same with embodiment 1, the difference is that only: replacing Mg-Y intermediate alloy, this comparative example using Mg-Yb intermediate alloy
In obtain alloying component be 5wt%Gd, 2wt%Yb, 0.01wt%As, Mg be surplus alloy.
The preparation method and embodiment 1 of the alloy are consistent.
Surface after this comparative example alloy immersion corrosion are as follows: corroded area is big, seriously corroded；Corrosion rate are as follows: 4.5mg/
cm2/d。
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (9)
1. a kind of anti-corrosion Mg-Gd-Y system alloy containing arsenic, which is characterized in that the alloy is grouped as by following group: 5.0~
The total amount of 11.0wt%Gd, 2.0~5.0wt%Y, 0.01~3.0wt%As, impurity element S i, Fe, Cu, Ni etc. are less than
0.3%, Mg are surplus.
2. a kind of preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 1 containing arsenic, which is characterized in that including
Following steps:
S1, the pure magnesium of raw material, Mg-Gd intermediate alloy, Mg-Y intermediate alloy, pure arsenic or arsenide are stocked up according to the ratio；
S2, under protective gas will sequentially add Mg-Gd intermediate alloy, Mg-Y intermediate alloy after the fusing of pure magnesium, stir after fusing equal
It is even；
S3, the pure arsenic or arsenide that are encased with aluminium foil are pressed into gained melt after step S2 processing with bell jar, are completely melt
After stir evenly；
S4, gained melt will be refined, stood after step S3 processing, be then cast in mold to get.
3. the preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 2 containing arsenic, which is characterized in that in step S1,
The Mg-Gd intermediate alloy includes the Mg-Gd intermediate alloy containing 25.0~35.0wt%Gd；The Mg-Y intermediate alloy includes containing
The Mg-Y intermediate alloy of 25.0~35.0wt%Y.
4. the preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 2 containing arsenic, which is characterized in that in step S1,
The arsenide includes Mg3As2, at least one of AsY.
5. the preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 2 containing arsenic, which is characterized in that in step S2,
The addition temperature of the Mg-Gd intermediate alloy and Mg-Y intermediate alloy is 700~750 DEG C.
6. the preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 2 containing arsenic, which is characterized in that in step S3,
The addition temperature of the pure arsenic or arsenide is 700~750 DEG C.
7. the preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 2 containing arsenic, which is characterized in that in step S3,
Stirring stands heat preservation 10~20 minutes after the pure arsenic or arsenide addition.
8. the preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 2 containing arsenic, which is characterized in that in step S4,
The refining, the specific steps stood are as follows: at 730~770 DEG C, the JDMJ that quality is alloy total weight 2wt% is added and refines
Agent continuously stirs, and when temperature is up to 770~780 DEG C, skims dross on surface of fusant after standing 20~30 minutes.
9. the preparation method of the anti-corrosion Mg-Gd-Y system alloy according to claim 2 containing arsenic, which is characterized in that in step S4,
The temperature of the casting is 700~730 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910204610.6A CN109913724A (en) | 2019-03-18 | 2019-03-18 | Containing anti-corrosion Mg-Gd-Y system alloy of As and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910204610.6A CN109913724A (en) | 2019-03-18 | 2019-03-18 | Containing anti-corrosion Mg-Gd-Y system alloy of As and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109913724A true CN109913724A (en) | 2019-06-21 |
Family
ID=66965529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910204610.6A Pending CN109913724A (en) | 2019-03-18 | 2019-03-18 | Containing anti-corrosion Mg-Gd-Y system alloy of As and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109913724A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229984A (en) * | 2019-06-20 | 2019-09-13 | 上海交通大学 | A kind of high intensity Mg-Gd-Er-Y magnesium alloy and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264762B1 (en) * | 1996-09-21 | 2001-07-24 | Daimlerchrysler Ag | Corrosion resistant magnesium compositions and applications thereof |
| CN101078080A (en) * | 2007-07-04 | 2007-11-28 | 北京有色金属研究总院 | Creep resistance magnesium alloy and preparation method thereof |
| CN104388787A (en) * | 2014-11-18 | 2015-03-04 | 闻喜县瑞格镁业有限公司 | High-strength, corrosion-resistant and high-temperature creep-resistant magnesium alloy and preparation method thereof |
| CN104651694A (en) * | 2015-01-30 | 2015-05-27 | 上海交通大学 | Magnesium alloy and preparation method and application thereof |
| CN106148792A (en) * | 2016-08-17 | 2016-11-23 | 上海交通大学 | Wrought magnesium alloy of high intensity height Gd content and preparation method thereof |
| CN106756370A (en) * | 2016-12-10 | 2017-05-31 | 哈尔滨工业大学 | A kind of anti-flaming Mg Gd Y Zn Zr alloys of high-strength anticorrosion and preparation method thereof |
-
2019
- 2019-03-18 CN CN201910204610.6A patent/CN109913724A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264762B1 (en) * | 1996-09-21 | 2001-07-24 | Daimlerchrysler Ag | Corrosion resistant magnesium compositions and applications thereof |
| CN101078080A (en) * | 2007-07-04 | 2007-11-28 | 北京有色金属研究总院 | Creep resistance magnesium alloy and preparation method thereof |
| CN104388787A (en) * | 2014-11-18 | 2015-03-04 | 闻喜县瑞格镁业有限公司 | High-strength, corrosion-resistant and high-temperature creep-resistant magnesium alloy and preparation method thereof |
| CN104651694A (en) * | 2015-01-30 | 2015-05-27 | 上海交通大学 | Magnesium alloy and preparation method and application thereof |
| CN106148792A (en) * | 2016-08-17 | 2016-11-23 | 上海交通大学 | Wrought magnesium alloy of high intensity height Gd content and preparation method thereof |
| CN106756370A (en) * | 2016-12-10 | 2017-05-31 | 哈尔滨工业大学 | A kind of anti-flaming Mg Gd Y Zn Zr alloys of high-strength anticorrosion and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| JIE SUN ET AL.: "Microscopic deformation compatibility during monotonic loading in a Mg-Gd-Y alloy", 《MATERIALS CHARACTERIZATION》 * |
| N.BIRBILIS ET AL.: "Poisoning the corrosion of magnesium", 《ELECTROCHEMISTRY COMMUNICATIONS》 * |
| 杨庆波等: "热处理对砂型铸造Mg-Gd-Y合金微观组织和力学性能的影响", 《宇航材料工艺》 * |
| 陈杰等: "高强高韧Mg-8.5Gd-2.0Y-1.0Ag-0.4Zr合金的组织与性能", 《高技术通讯》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229984A (en) * | 2019-06-20 | 2019-09-13 | 上海交通大学 | A kind of high intensity Mg-Gd-Er-Y magnesium alloy and preparation method thereof |
| CN110229984B (en) * | 2019-06-20 | 2020-08-04 | 上海交通大学 | High-strength Mg-Gd-Er-Y magnesium alloy and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kori et al. | Development of an efficient grain refiner for Al–7Si alloy and its modification with strontium | |
| WO2010012184A1 (en) | High potential magnesium alloy sacrificial anode and manufacturing method thereof | |
| CN104862710B (en) | A kind of environmentally friendly sacrificial zinc alloy anode | |
| CN103421991A (en) | Composite metamorphic cast aluminum alloy and preparation method and application thereof | |
| Tang et al. | Fabrication of Mg–Pr and Mg–Li–Pr alloys by electrochemical co-reduction from their molten chlorides | |
| CN109694964A (en) | A kind of preparation method of aluminium-air cell anode material | |
| CN105779837A (en) | Gd containing sacrificial anode magnesium alloy | |
| CN113293384A (en) | Zinc-free aluminum alloy sacrificial anode | |
| CN111074089A (en) | Wear-resistant corrosion-resistant multi-element manganese aluminum bronze brazing alloy and preparation method thereof | |
| Zhang et al. | Kinetic study on the corrosion behavior of AM60 magnesium alloy with different Nd contents | |
| CN113046755A (en) | High-temperature-resistant zinc alloy sacrificial anode and preparation method thereof | |
| CN105463280A (en) | Magnesium alloy with high thermal conductivity and preparation method of magnesium alloy | |
| CN109913724A (en) | Containing anti-corrosion Mg-Gd-Y system alloy of As and preparation method thereof | |
| CN102134673A (en) | High-toughness heat-resistant corrosion-resistant rare earth magnesium alloy and preparation method thereof | |
| CN105088026A (en) | Castable aluminum alloy material for cylinder cover and preparation method thereof | |
| Mance et al. | The effect of small additions of indium and thallium on the corrosion behaviour of aluminium in sea water | |
| Li et al. | Electrochemical reduction of Tm on Mg electrodes and co-reduction of Mg, Li and Tm on W electrodes | |
| Jihua et al. | Effects of Sn and Ca additions on microstructure, mechanical properties, and corrosion resistance of the as‐cast Mg‐Zn‐Al‐based alloy | |
| CN108441729A (en) | A kind of magnesium-alloy anode material and preparation method thereof | |
| Fei et al. | Corrosion behavior of as-cast Mg68Zn28Y4 alloy with I-phase | |
| KR20210028682A (en) | High-strength and corrosion-resistant magnesium alloy material and its manufacturing method | |
| CN101407880A (en) | Mg-Zn-Zr-Nd magnesium alloy and preparation thereof | |
| CN107287470B (en) | A kind of lead storage battery grid alloy and preparation method comprising nanometer tungsten carbide material | |
| Bourguignon et al. | Electrochemical study in sulphuric acid of the hardening L12 phases of Pb–Ca–Sn alloys | |
| CN102925902A (en) | Method for controlling electrochemical performance of aluminum anode with high iron tramp content |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190621 |