Liquid antirusting agent used in railway vehicle water sandblasting antirusting process as well as preparation method and application thereof

Abstract

The invention discloses liquid antirusting agent used in a railway vehicle water sandblasting antirusting process as well as a preparation method and an application thereof. The liquid antirusting agent comprises the following components by weight percent: 8-10% of main film-forming agent, 3-5% of alkaline corrosion inhibitor, 5-10% of antirusting agent, 1-2% of accelerating agent, 0.5-1% of surface active agent and the balance water, wherein the main film-forming agent is tripolyphosphate, the alkaline corrosion inhibitor is oil rare earth sulfonate, the antirusting agent is organic amine and the accelerating agent is calcined soda. In the preparation process, each component is evenly mixed with water according to the ratio. When in use, the liquid antirusting agent is diluted with water at the ratio of (1:2)-(1:3) and is used for spraying the surface of railway vehicles subject to water sandblasting antirusting; or the liquid antirusting agent is added to the circulating water used in the water sandblasting antirusting process at the weight ratio of (1:8)-(1:10) and is directly used for carrying out water sandblasting antirusting on the surface of the railway vehicles. The liquid antirusting agent is characterized by low cost, safety, environmental friendliness, favorable antirusting effect, excellent welding performance and the like, and fully meets the requirements of the mechanical and automatic water sandblasting process of the railway vehicles or ultra large structures.

Description

technical field [0001] The invention relates to an antirust agent for metal surfaces, in particular to a liquid antirust agent for water blasting and derusting technology of railway vehicles, and a preparation method and application of the liquid antirust agent. Background technique [0002] In the maintenance process of railway vehicles such as railway wagons, the traditional dry blasting or spraying process is mostly used for derusting the whole vehicle. Since this process has no intermediate protective measures, it is easy to cause secondary corrosion on the surface of the car body, and it is difficult to completely remove the residual rust and scale on the surface of the car body, so it has an unavoidable impact on the quality of the car body surface coating. Moreover, when using the traditional projectile or jetting process, with the prolongation of equipment use time, the pollution of dust to the environment will become more and more serious. [0003] With the continu...

AI Technical Summary

Problems solved by technology

However, traditional metal antirust agents are far from suitable for railway vehicle mechanical automation due to the difficulty in maintaining good protection in humid and water mist environments, and the overlay or residues have adverse effects on the welding of steel structures during vehicle maintenance. The need for water blasting rust removal process