Scale and corrosion resistant rare earth-Ag-Zn alloy and its preparation method

Abstract

The invention discloses a scale and corrosion resistant rare earth-Ag-Zn alloy and its preparation method. The alloy is obtained through melting metallic elements having different electronegativities and comprising 40-65wt% of Ag, 15-35wt% of Zn, 5-25wt% of Ni, 2-15wt% of Sn, 0.5-4wt% of Mn, 1-5wt% of Ti, 1.5-10wt% of Mo, 0.5-5wt% of Pb, 0.5-2.5wt% of Nd and 0.5-2.5wt% of Sm. The rare earth-Ag-Zn alloy is mainly used for the scale and corrosion resistance of producing well oil tubes and pipelines in the petrochemical industry, is also used for the boiler scale resistance in the heat supply industry, the electric power industry and the like, and is a scale and corrosion resistant product having the advantages of excellent scale and corrosion resistances, safety, environmental protection and resource saving.

Description

Technical field: [0001] The invention relates to an anti-scaling and anti-corrosion alloy and a preparation method thereof, in particular to an anti-scaling and anti-corrosion rare earth silver-zinc alloy and a preparation method thereof. Background technique: [0002] In the process of oil exploitation, due to the dissolution of a large amount of carbonate and silicate in the rock, the fouling and corrosion of the downhole tubing are very serious, often resulting in fouling of the inspection pump and overhaul of the oil well. Not only wasting a lot of human and financial resources, but also seriously affecting production. Due to the limitation of the underground environment, the existing methods for anti-scaling and anti-corrosion are only mechanical descaling, chemical anti-scaling, cathodic protection anti-corrosion, corrosion inhibitor anti-corrosion and other methods. Although these methods can prevent anti-scaling and anti-corrosion, they have obvious shortcomings. Fo...

AI Technical Summary

Problems solved by technology

Not only wasting a lot of human and financial resources, but also seriously affecting production

Due to the limitation of the underground environment, the existing methods for anti-scaling and anti-corrosion are only mechanical descaling, chemical anti-scaling, cathodic protection anti-corrosion, corrosion inhibitor anti-corrosion and other methods. Although these methods can prevent anti-scaling and anti-corrosion, they have obvious shortcomings. For example: mechanical descaling must stop production, which takes a long time, chemical anti-scaling is toxic and harmful, easy to cause environmental pollution, cathodic protection anti-corrosion, consumes a lot of resources