Liquid antirust agent used for water sandblasting rust removal process for railway vehicles

Abstract

The invention discloses a liquid antirust agent for metal surfaces, and particularly relates to a liquid antirust agent used for the water sandblasting rust removal process for railway vehicles, and a preparation method and application of the liquid antirust agent. The liquid antirust agent is composed of, by weight, 10%-15% of a main film forming agent, 5%-10% of an alkaline corrosion inhibitor, 10%-15% of an antirust agent, 2%-3% of an accelerant, 1%-1.5% of a surface active agent and the balance water. Tripolyphosphate is adopted as the main film forming agent, petroleum rare earth sulphonate is adopted as the alkaline inhibitor, organic amine is adopted as the antirust agent, and pure alkaline is adopted as the accelerant. The pH value of the liquid antirust agent mentioned above is controlled to be within the range between 10 and 15. During preparation, all the components are mixed with water to be stirred to be uniform according to the proportion. During use, the liquid antirust agent is diluted with water according to the weight ratio ranging from 1:2 to 1:3, and the mixture is used for spraying the surfaces of the railway vehicles subjected to water sandblasting rust removal processing; or, the liquid antirust agent is added in circulation water used for the water sandblasting rust removal process according to the weight ratio ranging from 1:8 to 1:10, and water sandblasting rust removal processing is directly conducted on the surfaces of the railway vehicles. The liquid antirust agent has the beneficial effects of being low in cost, safe, environment-friendly, good in antirust effect, good in welding performance, and the like, and is completely suitable for the antirust requirement of the automatic water sandblasting process of railway goods vans or ultra-large type structural member machines.

Description

technical field [0001] The invention relates to a liquid antirust agent for water blasting and derusting technology of railway vehicles, in particular to a preparation method and application of the liquid antirust agent. Background technique [0002] At present, in the maintenance process of railway vehicles such as railway wagons, the rust removal of the whole vehicle mostly adopts the traditional dry projectile or spraying process. 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 continuous development of main...

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