Preparation method of compound material for inhibiting oxidation corrosion by using potassium oleate modified metal sulfide

Abstract

The invention relates to a preparation method of a composite material for inhibiting oxidation corrosion by using potassium oleate modified metal sulfide, and belongs to the technical field of surface passivation. The preparation method comprises the following steps of ball-milling pyrite for 5 minutes, sieving with a 100-mesh sieve, washing with ultrapure water (volume: 1: 5) for five times, refrigerating in a refrigerator at-20 DEG C for 12 hours, drying in a freeze dryer for 48 hours, preparing potassium oleate into 5% (volume ratio) by using ultrapure water, putting 1mL and 0.5 g of pyrite samples into a 50mL beaker, shaking the beaker to uniformly spread the samples at the bottom of the beaker, and drying in a fuming cupboard to obtain the composite material. The composite material can be applied to oxidation of surface-passivated pyrite; under the simulated sunlight condition, pyrite oxidation is inhibited in a hydrochloric acid solution with the pH value of 2, and the inhibition rate can reach 80%.

Description

technical field [0001] The invention relates to semiconductors and photochemistry, in particular to a method for preparing a composite material that uses potassium oleate to modify metal sulfides to inhibit oxidation and corrosion, and belongs to the technical field of surface passivation. Background technique [0002] Pyrite (FeS 2 ) is a common mineral in nature. In the chemical structure of pyrite, Fe and S elements are combined with O 2 and H 2 O undergoes a series of redox reactions, leading to acidification of water and soil, and easily forms acid mine wastewater (AMD). A large amount of pyrite exists in mine tailings, and the associated toxic and harmful elements such as Pb, Cd, Cu, As, Hg, Tl in the tailings are released along with AMD, and these elements migrate and transform in the environment and pass through the chemical circle Circulation and food chains endanger human and animal life and health. [0003] Over the past few decades, various techniques have be...

AI Technical Summary

Problems solved by technology

In recent years, terminal treatment has always been the main method to control AMD pollution, but its limitations have become increasingly obvious: first, the cost of treating pollution is too high; second, terminal treatment often cannot be completely treated, leaving secondary pollutants that cannot be resolved; third, terminal Heavy metals after treatment are difficult to be reused

Images