CN109778197A - One kind anode magnesium alloy containing Yb and the preparation method and application thereof - Google Patents
One kind anode magnesium alloy containing Yb and the preparation method and application thereof Download PDFInfo
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- CN109778197A CN109778197A CN201910172410.7A CN201910172410A CN109778197A CN 109778197 A CN109778197 A CN 109778197A CN 201910172410 A CN201910172410 A CN 201910172410A CN 109778197 A CN109778197 A CN 109778197A
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Abstract
The invention belongs to Magnesium sacrificial anode technical fields, and in particular to one kind anode magnesium alloy containing Yb and the preparation method and application thereof.The anode magnesium alloy containing Yb is grouped as by group as follows by mass percentage: 3.3~3.5%Al, 0.5~0.7%Zn, 0.3~0.5%Yb, surplus Mg.This contains Yb anode magnesium alloy and is made by induction furnace melting, permanent mold casting.The present invention refines crystal grain and improvement tissue by the way that rare earth element y b is added, and has the characteristics that preparation process simply and dissolution consumption is uniform, suitable for the cathodic protection of steel component parts under soil, seawater, corrosion of water heater or similar environment, have broad application prospects.
Description
Technical field
The invention belongs to Magnesium sacrificial anode technical fields, and in particular to one kind anode magnesium alloy containing Yb and preparation method thereof
With application.
Background technique
Carrying out electrochemical protection using sacrificial anode is a kind of important metallic material corrosion means of defence, can effectively be dropped
Low metal material corrosion bring huge economic losses.Magnesium metal has relatively negative electrode potential -2.37V (vsSHE), is defeated by aluminium
- 2.31V and Zn-1.25V, therefore, when using magnesium and magnesium alloy as the anode material of power supply in use, relatively negative electrode electricity
Position can provide biggish driving force for the electric discharge of anode, to provide biggish discharge current.Magnesium metal possesses biggish electricity
Capacity, theoretical capacity 2205A.h/kg, it will be further appreciated that, the density of magnesium metal is small, therefore it possesses biggish matter
Energy density is suitable as anode material electric discharge and uses.
Magnesium alloy is often used as sacrificial anode material, corrosion protection is carried out to the cathode material of important apparatus, to prolong
The service life of long cathode material.But ingredient design and prepare it is technologic due to, ordinary magnesium alloy anode material
(such as AZ31) often coarse grains, nonuniform organization, and aluminium and magnesium form netted Mg17Al12Phase is easy to be formed with magnesium matrix
Micro cell keeps the consumption of anode material uneven, influences the service life of anode material.
Summary of the invention
For overcome the deficiencies in the prior art and disadvantage, the primary purpose of the present invention is that providing a kind of magnesium of anode containing Yb conjunction
Gold, the magnesium alloy include metallic ytterbium, are corrosion protection magnesium alloy, are consumed uniformly in corrosive environment, are suitable for soil, sea
The cathodic protection of steel component parts under water, corrosion of water heater or similar environment.
Another object of the present invention is to provide the preparation method of the above-mentioned anode magnesium alloy containing Yb, the preparation method technique letters
It is single, at low cost.
A further object of the present invention is to provide the applications of the above-mentioned anode magnesium alloy containing Yb.
The purpose of the invention is achieved by the following technical solution:
A kind of anode magnesium alloy containing Yb, is grouped as by group as follows by mass percentage:
3.3~3.5%Al, 0.5~0.7%Zn, 0.3~0.5%Yb, surplus Mg；
The anode magnesium alloy containing Yb is grouped as by group as follows by mass percentage:
3.5%Al, 0.5%Zn, 0.5%Yb, surplus Mg；
The preparation method of the anode magnesium alloy containing Yb, comprises the following steps:
It will contain in the pure magnesium of Yb anode magnesium alloy each raw material component (Mg), fine aluminium (Al), pure zinc (Zn) and magnesium-ytterbium (Mg-Yb)
Between alloy mix, melting and casting obtains anode magnesium alloy containing Yb；
The purity of the raw material components is preferably 99.8% or more；
The condition of the melting and casting is preferred are as follows: in CO2+SF6Melting under gas shield, to magnesium after raw material components fusing
Aluminium alloy is warming up to 700~720 DEG C；
When, it pours into steel die, obtains anode magnesium alloy containing Yb；
The melting and casting preferably carries out in crucible and induction furnace；
The crucible is preferably corundum crucible；
The liquid magnesium alloy is preferably warming up to 710 DEG C；
Application of the anode magnesium alloy containing Yb in Magnesium sacrificial anode preparation field；
The principle of the present invention:
The group of anode magnesium alloy containing Yb provided by the invention is divided into Mg-Al-Zn-Yb.Wherein, each component effect is as follows:
Al: for alloy strength, aluminium is beneficial element.Aluminium and magnesium form Mg17Al12Phase, this is mutually Mg-Al alloy
Main hardening constituent at room temperature, can be improved magnesium alloy room temperature intensity, improve magnesium-alloy anode material service life indirectly.But it is right
For corrosion resistance, aluminium is both harmful element and beneficial element.Aluminium can form Mg with magnesium17Al12Phase, this mutually and magnesium matrix by
In the difference of electrode potential, primary battery can be formed, magnesium matrix is anode, Mg at this time17Al12It is mutually cathode.Work as Mg17Al12Mutually with
Net distribution is near crystal boundary, due to grain boundaries (Mg17Al12Phase) it is larger with intra-die (magnesium matrix) difference in Electrode Potential, it can be with
Accelerate the corrosion rate of intra-die, at this time cathode phase Mg17Al12Promote the corrosion of magnesium；Work as Mg17Al12The net distribution quilt of phase
It disconnects, pattern and distribution are optimized, and tissue becomes uniformly, to add Mg17Al12There is a preferable corrosion resistance, after crystal grain refinement
Tissue becomes more uniform, will reduce grain boundaries (Mg17Al12Phase) with the difference in Electrode Potential of intra-die (magnesium matrix), so
Improve the corrosion resistance of alloy entirety, at this time cathode phase Mg17Al12Inhibition is played to the corrosion of magnesium.The present invention selects Al's
Additional amount is 3.3~3.5wt%, and lower than the range, then alloy strength is too low, influences anode material service life；Higher than the range
The Mg then generated17Al12It is mutually excessive, it reticulates and is distributed in crystal boundary, cause alloy structure uneven, promote corrosion and cause to corrode
Unevenly, it also will affect service life.
Zn: the ability of the anti-seawater corrosion of alloy can be improved in the addition of zinc, and being primarily due to zinc can be dissolved into magnesium
Matrix plays solution strengthening effect, improves alloy material intensity, while reducing intra-die and grain boundaries component difference, improves
Structural homogenity improves alloy corrosion resistance.In addition, Zn can also reduce the harm of the impurity such as Fe, Ni.The present invention selects adding for Zn
Entering amount is 0.5~0.7wt%.
Yb: in the prior art, Yb is added in magnesium alloy, can be improved the intensity of alloy.And in the present invention, Yb's adds
Add, on the one hand, can be dissolved into magnesium matrix, play solution strengthening effect, improve alloy material intensity；Rare earth and aluminium are raw simultaneously
At dystectic intermetallic compound phase Al2Yb phase can be used as effective forming core core, refines crystal grain, plays refined crystalline strengthening
Effect, further increases alloy material intensity；On the other hand, a part of aluminium is consumed, Mg is reduced17Al12The quantity of phase and by its net
Shape distribution disconnects, and reduces intra-die and grain boundaries component difference, improves the uniformity of structural homogenity and electrode potential, is mentioning
High alloy is corrosion proof simultaneously, also the corrosion of alloy can be become uniform.The present invention select the additional amount of Yb for 0.3~
0.5wt%.
In Mg-Al-Zn-Yb system anode magnesium alloy, to guarantee the strength of materials, there are certain aluminium content, but aluminium content
It causes alloy structure and corrosion uneven when excessively high, can not play the role of being effectively protected to cathode material.So to be added dilute
Native Yb element, further reinforced alloys refine crystal grain, and uniform formation reduces Mg17Al12The illeffects of phase, makes alloy in corruption
There should be certain corrosion resistance in erosion environment, corrosion uniformly, improves service life, plays and be effectively protected to cathode material again
Effect.
The present invention has the following advantages and effects with respect to the prior art:
(1) existing magnesium-alloy anode material there are aiming at the problem that, the present invention provides anode magnesium alloy containing Yb, which is closed
Gold be corrosion protection magnesium alloy, can reinforced alloys, refine crystal grain, uniform formation, reduce Mg17Al12The illeffects of phase, makes
Alloy should have certain corrosion resistance in corrosive environment, and corrosion uniformly, is improved service life, played to cathode material again
The protective effect of effect.
(2) preparation process of anode magnesium alloy containing Yb provided by the invention is simple, at low cost, with pure magnesium (Mg), fine aluminium (Al),
Pure zinc (Zn) and magnesium-ytterbium (Mg-Yb) intermediate alloy are raw material, only need simple melting and casting, are not required to other any processing, are fitted
In industrialized production.
(3) anode magnesium alloy containing Yb provided by the invention is suitable for steel zero under soil, seawater, corrosion of water heater or similar environment
The cathodic protection of component, has broad application prospects.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
The present invention relates to the pure magnesium of raw material (Mg), fine aluminium (Al), pure zinc (Zn) and magnesium-ytterbium (Mg-Yb) intermediate alloy it is equal
For commercial product, purity is 99.8% or more.
Embodiment 1
A kind of anode magnesium alloy containing Yb, is grouped as by group as follows by mass percentage:
3.3%Al, 0.7%Zn, 0.3%Yb, surplus Mg；
The preparation method of the anode magnesium alloy containing Yb, comprises the following steps:
It will contain in the pure magnesium of Yb anode magnesium alloy each raw material component (Mg), fine aluminium (Al), pure zinc (Zn) and magnesium-ytterbium (Mg-Yb)
Between alloy mix, be placed in corundum crucible (corundum crucible is placed in induction furnace), in CO2+SF6Mixed gas protected lower melting,
It after melting sources when liquid magnesium alloy is warming up to 710 DEG C, is cast in steel die, obtains the ingot casting of anode magnesium alloy containing Yb.
Embodiment 2
A kind of anode magnesium alloy containing Yb, is grouped as by group as follows by mass percentage:
3.4%Al, 0.6%Zn, 0.4%Yb, surplus Mg；
It will contain in the pure magnesium of Yb anode magnesium alloy each raw material component (Mg), fine aluminium (Al), pure zinc (Zn) and magnesium-ytterbium (Mg-Yb)
Between alloy mix, be placed in corundum crucible (corundum crucible is placed in induction furnace), in CO2+SF6Mixed gas protected lower melting,
It after melting sources when liquid magnesium alloy is warming up to 710 DEG C, is cast in steel die, obtains the ingot casting of anode magnesium alloy containing Yb.
Embodiment 3
A kind of anode magnesium alloy containing Yb, is grouped as by group as follows by mass percentage:
3.5%Al, 0.5%Zn, 0.5%Yb, surplus Mg；
It will contain in the pure magnesium of Yb anode magnesium alloy each raw material component (Mg), fine aluminium (Al), pure zinc (Zn) and magnesium-ytterbium (Mg-Yb)
Between alloy mix, be placed in corundum crucible (corundum crucible is placed in induction furnace), in CO2+SF6Mixed gas protected lower melting,
It after melting sources when liquid magnesium alloy is warming up to 710 DEG C, is cast in steel die, obtains the ingot casting of anode magnesium alloy containing Yb.
Comparative example 1
A kind of anode magnesium alloy is grouped as by group as follows by mass percentage:
3.3%Al, 0.7%Zn, 0.1%Yb, surplus Mg；
The preparation method of the anode magnesium alloy, comprises the following steps:
It will contain in the pure magnesium of Yb anode magnesium alloy each raw material component (Mg), fine aluminium (Al), pure zinc (Zn) and magnesium-ytterbium (Mg-Yb)
Between alloy mix, be placed in corundum crucible (corundum crucible is placed in induction furnace), in CO2+SF6Mixed gas protected lower melting,
It after melting sources when liquid magnesium alloy is warming up to 710 DEG C, is cast in steel die, obtains the ingot casting of anode magnesium alloy containing Yb.
Comparative example 2
A kind of anode magnesium alloy is grouped as by group as follows by mass percentage:
3.3%Al, 0.7%Zn, 1.0%Yb, surplus Mg；
The preparation method of the anode magnesium alloy, comprises the following steps:
It will contain in the pure magnesium of Yb anode magnesium alloy each raw material component (Mg), fine aluminium (Al), pure zinc (Zn) and magnesium-ytterbium (Mg-Yb)
Between alloy mix, be placed in corundum crucible (corundum crucible is placed in induction furnace), in CO2+SF6Mixed gas protected lower melting,
It after melting sources when liquid magnesium alloy is warming up to 710 DEG C, is cast in steel die, obtains the ingot casting of anode magnesium alloy containing Yb.
Effect example
By anode magnesium alloy and quotient made from anode magnesium alloy containing Yb made from Examples 1 to 3, comparative example 1~2
Detected with magnesium alloy AZ31, method particularly includes: in 3.5%NaCl solution, using three-electrode system test open circuit potential,
Expenditure Levels in current efficiency and corrosive environment.The results are shown in Table 1.
The material property testing result of anode magnesium alloy containing Yb made from 1 Examples 1 to 3 of table
| Object | Open circuit potential | Current efficiency | Expenditure Levels in corrosive environment |
| Embodiment 1 | –1.70V | 62% | Without obvious etch pit, consume more uniform |
| Embodiment 2 | –1.72V | 65% | Without obvious etch pit, consume more uniform |
| Embodiment 3 | –1.75V | 68% | Without obvious etch pit, consume more uniform |
| Comparative example 1 | –1.62V | 50% | There is etch pit, consumption is uneven |
| Comparative example 2 | –1.64V | 52% | There is etch pit, consumption is uneven |
| Commercial magnesium alloy AZ31 | –1.60V | 50% | There is etch pit, consumption is uneven |
As it can be seen from table 1 corrosion protection magnesium alloy of the invention, is made by casting, preparation process is simple, open circuit
Current potential is -1.70~-1.75V, and current efficiency is 62~68%, and material consumption is uniform in corrosive environment, there is wide answer
Use prospect.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (9)
1. a kind of anode magnesium alloy containing Yb, it is characterised in that be grouped as by group as follows by mass percentage:
3.3~3.5%Al, 0.5~0.7%Zn, 0.3~0.5%Yb, surplus Mg.
2. anode magnesium alloy containing Yb according to claim 1, it is characterised in that by component as follows by mass percentage
Composition:
3.5%Al, 0.5%Zn, 0.5%Yb, surplus Mg.
3. the preparation method of the anode magnesium alloy of any of claims 1 or 2 containing Yb, characterized by comprising the steps of:
The pure magnesium of Yb anode magnesium alloy each raw material component, fine aluminium, pure zinc and magnesium-ytterbium intermediate alloy mixing will be contained, melting and casting obtains
Anode magnesium alloy containing Yb.
4. the preparation method of the anode magnesium alloy according to claim 3 containing Yb, it is characterised in that:
The purity of the raw material components is 99.8% or more.
5. the preparation method of the anode magnesium alloy according to claim 3 containing Yb, it is characterised in that:
The condition of the melting and casting are as follows: in CO2+SF6Melting under gas shield, to liquid magnesium alloy liter after raw material components fusing
When temperature is to 700~720 DEG C, pours into steel die, obtain anode magnesium alloy containing Yb.
6. the preparation method of the anode magnesium alloy according to claim 5 containing Yb, it is characterised in that:
The melting and casting carries out in crucible and induction furnace.
7. the preparation method of the anode magnesium alloy according to claim 6 containing Yb, it is characterised in that:
The crucible is corundum crucible.
8. the preparation method of the anode magnesium alloy according to claim 7 containing Yb, it is characterised in that:
The liquid magnesium alloy is warming up to 710 DEG C.
9. application of the anode magnesium alloy containing Yb of any of claims 1 or 2 in Magnesium sacrificial anode preparation field.
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| CN112647001A (en) * | 2020-12-20 | 2021-04-13 | 东北电力大学 | AZ31M alloy and preparation method and application thereof |
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| CN110343890A (en) * | 2019-07-02 | 2019-10-18 | 南昌大学 | A kind of method of carbon nanotube and rare earth composite strengthening magnesium-based composite material |
| CN112647001A (en) * | 2020-12-20 | 2021-04-13 | 东北电力大学 | AZ31M alloy and preparation method and application thereof |
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Application publication date: 20190521 |