Screw loosening agent

Abstract

The invention discloses a screw loosening agent, which comprises the following components in part by weight: 60 to 80 parts of hydrocarbon refrigerant, 10 to 25 parts of hydrocarbon solvent oil, 3 to 5 parts of synthetic ester and 5 to 10 parts of sulfonate rust inhibitor, wherein the hydrocarbon refrigerant is R-433b or tetrafluoroethane HFC-R134a or a mixture of the R-433b and tetrafluoroethaneHFC-R134a; the hydrocarbon solvent oil is one or a mixture of C10 to C16 alkane; the synthetic ester is trimethylolpropane; and the sulfonate rust inhibitor is sulfonate. In the invention, according to the principle of expansion and contraction, a fastener which is rusted and cannot be loosened is subjected to flash freezing in a detachment process to make a required gap between structural members bonded into a whole due to rust corrosion, so that the solvent oil, synthetic ester, sulfonate and the like, which are sprayed out together with the refrigerant, can permeate into the gap for derusting and lubricating; and thus, both the fastener and the structural members get necessary repair and the loosening of the screw is realized naturally.

Description

technical field [0001] The invention relates to a screw loosening agent, in particular to a screw loosening agent capable of quickly loosening metal fasteners such as corroded screws. Background technique [0002] For railways, bridges, wire and steel frames, vehicles and various factory and mining machinery closely related to social development, the components are mainly fixed and connected by screws. In daily disassembly and repair operations, rusted screws and other fasteners that cannot be loosened are often treated by oil immersion, acid material corrosion, oxygen blowing, sawing and other methods. Time-consuming and labor-intensive, high cost and low efficiency. At present, there are already screw loosening agent products on the market, which bring great convenience to construction. However, because most of the raw materials used are industrial raw materials with penetration, derusting and lubricating effects, there are disadvantages such as relatively expensive prod...

AI Technical Summary

Problems solved by technology

However, because most of the raw materials used are industrial raw materials with penetration, rust removal and lubricating effects, there ar