CN104498792B - Quick-corrosion magnesium alloy product and preparation method thereof - Google Patents

Abstract

The invention relates to a fast corrosion magnesium alloy product, which comprises the following components in percentage by weight: 1-6% of aluminum, 1-6% of zinc, 1-3% of iron, 5-15% of copper, 0.1-1% of silver, 0.1-1.2% of nickel and the balance of magnesium. Meanwhile, the invention also discloses a preparation method of the alloy product. The invention fully utilizes the effects of aluminum and zinc elements to improve the strength and the hardness of the magnesium alloy, improves the corrosion rate by copper, iron, silver and nickel elements, and greatly improves the mechanical property and the corrosion rate by regulating and controlling the proportion of the metal elements, thereby achieving the purposes of being used as a structural member, protecting equipment and being capable of rapidly dissolving under specific conditions.

Description

A kind of rapid corrosion magnesium alloy product and preparation method thereof

technical field

The invention relates to the technical field of metal alloy materials, in particular to a rapid corrosion magnesium alloy product and a preparation method thereof.

Background technique

Magnesium alloy is an alloy composed of magnesium as the matrix and adding other elements. It is characterized by low density (about 1. 8g/cm3 magnesium alloy), high specific strength, large elastic modulus, good heat dissipation, good shock absorption, and The impact load capacity is greater than that of aluminum alloy, it is the lightest metal among practical metals, with high strength and high rigidity. With the development of industry, more and more metal materials are used, so the problem of corrosion and corrosion protection becomes more and more important.

There are many kinds of metal corrosion, electrochemical corrosion is one of the most important corrosion, and cathodic protection is an important metal electrochemical corrosion protection method, which can protect metal equipment by cathodic polarization. The advantage of the sacrificial anode protection method is that it does not require an external power supply, does not interfere with adjacent metal facilities, has good current dispersion capabilities, and is easy to manage and maintain, so it has been widely used.

However, for the existing magnesium alloy materials on the market, they cannot meet some special requirements under neutral environmental conditions, such as fast corrosion materials, which makes it urgent to develop a special magnesium alloy to meet this demand.

Contents of the invention

The technical problem to be solved by the invention is to provide a rapidly corroded magnesium alloy product with greatly improved mechanical properties and corrosion rate.

Another technical problem to be solved by the present invention is to provide a preparation method for the rapid corrosion magnesium alloy product.

In order to solve the above problems, a kind of rapid corrosion magnesium alloy product according to the present invention is characterized in that: the alloy product is composed of the following components by weight percentage: 1~6% aluminum, 1~6% zinc, 1~6% 3% iron, 5~15% copper, 0.1~1% silver, 0.1~1.2% nickel, and the balance is magnesium.

A method for preparing a rapid corrosion magnesium alloy product as described above, comprising the following steps:

⑴Pretreatment of magnesium-copper alloy containing 30% copper: Cut the magnesium-copper alloy containing 30% copper into small pieces of 20mm×20mm×20mm, and remove oxides and oil stains on the surface according to conventional methods, and then After cleaning with anhydrous alcohol, dry at a temperature of 101°C to constant weight to obtain the pretreated magnesium-copper alloy;

⑵Pretreatment of aluminum-nickel alloy containing 50% nickel: Cut the aluminum-nickel alloy containing 50% nickel into small pieces of 10mm×10mm×10mm, remove oxides and oil stains on the surface according to conventional methods, and then After cleaning with anhydrous alcohol, dry at a temperature of 101°C to constant weight to obtain the pretreated aluminum-nickel alloy;

(3) Pretreatment of magnesium ingots, aluminum ingots, and zinc ingots: respectively cut magnesium ingots, aluminum ingots, and zinc ingots into small pieces of 100mm×50mm×20mm, and remove oxides and oil stains on the surface according to conventional methods, and then After cleaning with anhydrous alcohol, dry at a temperature of 101°C to constant weight to obtain pretreated magnesium ingots, aluminum ingots, and zinc ingots;

(4) Pretreatment of iron powder and silver powder respectively: after drying iron powder and silver powder with particle size ≥ 100 mesh at a temperature of 101°C to constant weight, respectively, dry iron powder and dry silver powder are obtained;

(5) Using conventional methods, convert the pretreated magnesium ingots, aluminum ingots, zinc ingots, and the pretreated magnesium-copper alloys, the pretreated aluminum-nickel alloys, and the dried The amount of iron powder and the dry silver powder, and then they are sequentially added to the smelting furnace, heated to 660~750°C under the protection of inert gas argon to melt, and stirred evenly to obtain the melt; the melt The material is kept at 700°C~750°C for 25~35 minutes, then cooled to 660~700°C, and cast at this temperature for 10~20 minutes to obtain an ingot, which is naturally cooled to room temperature, that is, fast Corrosion of magnesium alloy products.

The magnesium ingots, aluminum ingots, zinc ingots, magnesium-copper alloys containing 30% copper, and aluminum-nickel alloys containing 50% nickel are all of industrial grade purity and above.

Both iron powder and silver powder are industrial grade.

Compared with the prior art, the present invention has the following advantages:

1. The present invention makes full use of the effects of aluminum and zinc elements to increase the strength and hardness of magnesium alloys, copper, iron, silver, and nickel elements to increase the corrosion rate, and adjusts the ratio between metal elements to make its mechanical properties and corrosion resistance The rates are greatly increased (see Table 1, the corrosion rate test refers to JB/T 7901-1999, the specific conditions are that the sample block is tested in 60 ° C, 3% KCl solution), its tensile strength is above 300 MPa, and the corrosion rate is It is more than 5 times that of ordinary sacrificial anode magnesium alloy, which can meet the performance required by certain specific constructions, such as oil and gas field fracturing construction, sacrificial materials, so as to be used as structural parts and protect equipment, and can also be used under certain conditions The purpose of self-dissolving quickly.

Table 1

detailed description

Example 1 A rapidly corroding magnesium alloy product, the alloy product is composed of the following components by weight percentage (g/g): 1% aluminum, 6% zinc, 1% iron, 10% copper, 0.1% of silver, 0.1% of nickel, and the balance of magnesium.

The preparation method of the rapid corrosion magnesium alloy product comprises the following steps:

⑴Pretreatment of magnesium-copper alloy containing 30% copper: Cut the magnesium-copper alloy containing 30% copper into small pieces of 20mm×20mm×20mm, and remove oxides and oil stains on the surface according to conventional methods, and then After cleaning with anhydrous alcohol, dry at a temperature of 101° C. to constant weight to obtain the pretreated magnesium-copper alloy.

⑵Pretreatment of aluminum-nickel alloy containing 50% nickel: Cut the aluminum-nickel alloy containing 50% nickel into small pieces of 10mm×10mm×10mm, remove oxides and oil stains on the surface according to conventional methods, and then After cleaning with anhydrous alcohol, dry at a temperature of 101° C. to constant weight to obtain the pretreated aluminum-nickel alloy.

(3) Pretreatment of magnesium ingots, aluminum ingots, and zinc ingots: respectively cut magnesium ingots, aluminum ingots, and zinc ingots into small pieces of 100mm×50mm×20mm, and remove oxides and oil stains on the surface according to conventional methods, and then After cleaning with anhydrous alcohol, dry at a temperature of 101° C. to constant weight to obtain pretreated magnesium ingots, aluminum ingots, and zinc ingots.

(4) Pretreatment of iron powder and silver powder respectively: after drying iron powder and silver powder with particle size ≥100 mesh at a temperature of 101°C to constant weight, dry iron powder and dry silver powder are respectively obtained.

(5) Add 585g of pretreated magnesium ingot, 9g of aluminum ingot, 60g of zinc ingot, 333g of pretreated magnesium-copper alloy, 2g of pretreated aluminum-nickel alloy, 10g of dry iron powder, and 1g of dry silver powder in sequence In the smelting furnace, under the protection of inert gas argon, heat up to 660~750°C to melt, and stir evenly to obtain the melt; the melt is kept at 700°C~750°C for 25~35 minutes and then cooled to 660°C ~700°C, and cast at this temperature for 10-20 minutes to obtain an ingot. The ingot is naturally cooled to room temperature, and the rapid corrosion magnesium alloy product is obtained.

Example 2 A rapidly corroding magnesium alloy product, the alloy product is composed of the following components by weight percentage (g/g): 6% aluminum, 1% zinc, 3% iron, 5% copper, 1% of silver, 1.2% of nickel, and the balance of magnesium.

The preparation method of the rapid corrosion magnesium alloy product comprises the following steps:

(1) the magnesium-copper alloy containing 30% copper is pretreated with embodiment 1.

(2) Pretreatment is carried out with embodiment 1 to the aluminum-nickel alloy containing 50% nickel.

(3) Carry out pretreatment to magnesium ingot, aluminum ingot, zinc ingot respectively with embodiment 1.

(4) Carry out pretreatment with embodiment 1 to iron powder and silver powder respectively.

(5) Add 711g of pretreated magnesium ingot, 48g of aluminum ingot, 10g of zinc ingot, 167g of pretreated magnesium-copper alloy, 24g of pretreated aluminum-nickel alloy, 30g of dry iron powder, and 10g of dry silver powder in sequence In the smelting furnace, under the protection of inert gas argon, heat up to 660~750°C to melt, and stir evenly to obtain the melt; the melt is kept at 700°C~750°C for 25~35 minutes and then cooled to 660°C ~700°C, and cast at this temperature for 10-20 minutes to obtain an ingot. The ingot is naturally cooled to room temperature, and the rapid corrosion magnesium alloy product is obtained.

Example 3 A rapidly corroding magnesium alloy product, the alloy product is composed of the following components by weight percentage (g/g): 3% aluminum, 3% zinc, 2% iron, 15% copper, 0.5% of silver, 0.5% of nickel, and the balance of magnesium.

The preparation method of the rapid corrosion magnesium alloy product comprises the following steps:

(1) the magnesium-copper alloy containing 30% copper is pretreated with embodiment 1.

(2) Pretreatment is carried out with embodiment 1 to the aluminum-nickel alloy containing 50% nickel.

(3) Carry out pretreatment to magnesium ingot, aluminum ingot, zinc ingot respectively with embodiment 1.

(4) Carry out pretreatment with embodiment 1 to iron powder and silver powder respectively.

(5) Add 410kg of pretreated magnesium ingot, 25g of aluminum ingot, 30g of zinc ingot, 500g of pretreated magnesium-copper alloy, 10g of pretreated aluminum-nickel alloy, 20g of dry iron powder, and 5g of dry silver powder in sequence In the smelting furnace, under the protection of inert gas argon, heat up to 660~750°C to melt, and stir evenly to obtain the melt; the melt is kept at 700°C~750°C for 25~35 minutes and then cooled to 660°C ~700°C, and cast at this temperature for 10-20 minutes to obtain an ingot. The ingot is naturally cooled to room temperature, and the rapid corrosion magnesium alloy product is obtained.

In the above examples 1-3, magnesium ingots, aluminum ingots, zinc ingots, magnesium-copper alloys containing 30% copper, and aluminum-nickel alloys containing 50% nickel are all of industrial grade purity and above. Both iron powder and silver powder are industrial grade.

Claims (3)

1. a fast erosion magnesium-alloy material, it is characterised in that: this alloy product is grouped into by the one-tenth of following weight percentage ratio: The aluminum of 1 ~ 6%, the zinc of 1 ~ 6%, the ferrum of 1 ~ 3%, the copper of 5 ~ 15%, the silver of 0.1 ~ 1%, the nickel of 0.1 ~ 1.2%, surplus is magnesium；

Its preparation method, comprises the following steps:

(1) magnesium-the copper alloy containing 30% bronze medal is carried out pretreatment: the magnesium-copper alloy containing 30% bronze medal is cut into 20mm × 20mm × 20mm Fritter, and remove oxide and the greasy dirt on surface according to a conventional method, then after anhydrous alcohol cleans up, be 101 in temperature Dry under conditions of DEG C to constant weight, obtain pretreated magnesium-copper alloy；

(2) the aluminum-nickel alloy containing 50% nickel is carried out pretreatment: the aluminum-nickel alloy containing 50% nickel is cut into 10mm × 10mm × 10mm Fritter, and remove oxide and the greasy dirt on surface according to a conventional method, then after anhydrous alcohol cleans up, be 101 in temperature Dry under conditions of DEG C to constant weight, obtain pretreated aluminum-nickel alloy；

The most respectively magnesium ingot, aluminium ingot, zinc ingot metal are carried out pretreatment: respectively magnesium ingot, aluminium ingot, zinc ingot metal are cut into 100mm × 50mm × The fritter of 20mm, and remove oxide and the greasy dirt on surface according to a conventional method, then after anhydrous alcohol cleans up, in temperature be Dry to constant weight under conditions of 101 DEG C, i.e. respectively obtain pretreated magnesium ingot, aluminium ingot, zinc ingot metal；

The most respectively iron powder and argentum powder are carried out pretreatment: be 101 DEG C by the iron powder of granularity >=100 mesh and argentum powder in temperature respectively Under the conditions of dry to constant weight, i.e. respectively obtain dry iron powder and be dried argentum powder；

(5) use conventional method, convert described pretreated magnesium ingot, aluminium ingot, zinc ingot metal and described pretreated by 1kg product Magnesium-copper alloy, described pretreated aluminum-nickel alloy, described dry iron powder, the consumption of described dry argentum powder, then will They are added sequentially in smelting furnace, be warming up to 660 ~ 750 DEG C and make it melt under the protection of noble gas argon, and stir all Even, obtain fused mass；Described fused mass is cooled to 660 ~ 700 DEG C after being incubated 25 ~ 35 minutes at 700 DEG C ~ 750 DEG C, and in this temperature The lower standing of degree was cast after 10 ~ 20 minutes, obtained ingot casting, and this ingot casting naturally cools to room temperature, obtains fast erosion magnesium alloy Product.

2. fast erosion magnesium-alloy material as claimed in claim 1 a kind of, it is characterised in that: described magnesium ingot, aluminium ingot, zinc ingot metal, Magnesium-copper alloy containing 30% bronze medal, the aluminum-nickel alloy containing 50% nickel be technical grade purity and more than.

3. a kind of fast erosion magnesium-alloy material as claimed in claim 1, it is characterised in that: described iron powder, argentum powder are work Industry level.