Metal surface liquid rust inhibitor

Abstract

The invention discloses a metal surface liquid rust inhibitor, and especially relates to a liquid rust inhibitor for a railway vehicle water sandblast rust removal technology, and a preparation method and a use thereof. The metal surface liquid rust inhibitor comprises 8-10wt% of a main film forming agent, 3-5wt% of an alkaline corrosion inhibitor, 5-10wt% of a rust inhibitor, 1-20wt% of a promoter, 0.5-1wt% of a surfactant, and the balance of water, the main film forming agent is tripolyphosphate, the alkaline corrosion inhibitor is rare earth petroleum sulfonate, the rust inhibitor is organic amine, and the promoter is soda ash. The preparation method is characterized in that all components are mixed with water in proportion, and are uniformly stirred. When the metal surface liquid rust inhibitor is used, the metal surface liquid rust inhibitor is diluted by water according to a weight ratio of 1:2-1:3, and the obtained solution is used for spraying the surface of a railway vehicle obtained after water sandblast rust removal treatment; or the metal surface liquid rust inhibitor is added to circulating water for the water sandblast rust removal technology according to a weight ratio of 1:8-1:10, and the obtained liquor is directly used to carry out water sandblast rust removal treatment on the surface of the railway vehicle. The liquid rust inhibitor has the characteristics of low cost, safety, environmental protection, good rust inhibition effect and excellent welding performance, and completely adapts to the rust inhibition requirements of the mechanical automatic water sandblast technology of a rail wagon or an ultra large structural member.

Description

technical field [0001] The invention relates to a liquid 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] 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. ...

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