High-crush-resisting rapid degradation magnesium alloy and preparation method thereof

Abstract

The invention discloses a high-crush-resisting rapid degradation magnesium alloy and a preparation method thereof. The alloy is prepared from, by mass percent, 5.0-10wt% of Zn, 1.20-6.0wt% of Cu, 1.50-3.0wt% of Ni, 1.50-5.0wt% of Nd, 0.5-1.5wt% of Ca and the balance Mg and the other impurity elements. According to the high-crush-resisting rapid degradation magnesium alloy and the preparation method thereof, Cu, Nd, Ca and other alloy elements are added to improve the crush resistance of a material, and the degradation rate is increased through Cu and Ni. According to the prepared high-crush-resisting rapid degradation magnesium alloy, the corrosion rate in a 3% KC1 solution at the temperature of 25 DEG C can reach 7.4 mg cm<-2>h<-1>, and the corrosion rate in the 3% KC1 solution at the temperature of 93 DEG C can reach 88 mg cm<-2>h<-1>; and high crush resisting strength is achieved, and the high-crush-resisting rapid degradation magnesium alloy and the preparation method thereof are suitable for the field of shale gas extraction with a rapid corrosion requirement.

Description

technical field

[0001] The invention belongs to the field of metal materials and applications, in particular to a high-pressure-resistant and rapidly degradable magnesium alloy, a preparation method and application thereof. Background technique

[0002] In recent years, my country's oil and gas resources have become increasingly tense, and fuel prices have also been increasing. Oilfield exploitation has shifted from high-permeability oilfields to low-permeability unconventional oilfields, making oil and gas resources fully exploited and utilized efficiently. With the increase of oilfield development years and times, it is difficult for the development of original oilfields to meet the demand of high and stable production. In the process of water injection development of oil and gas production, the injected water will seep out along the direction of old fractures, which requires downhole temporary plugging tools to seal old fractures and open new fractures to improve downhole...

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