Water-based antirust agent for filter and preparation thereof

Abstract

The invention relates to a water base rust preventive for a filter, which comprises 50 to 60 weight parts of hydroxyalkyl starch, 40 to 50 weight parts of acetic ester starch, 80 to 100 weight parts of aqueous fluorocarbon emulsion, 300 to 350 weight parts of water, 55 to 75 weight parts of polyfluortetraethylene emulsion, 8 to 10 weight parts of micron or nanometer zinc powder, 40 to 50 weight parts of isopropanol and 20 to 30 weight parts of acetone, wherein the hydroxyalkyl starch is ethoxyl starch or hydroxypropyl starch; the aqueous fluorocarbon emulsion is multipolymer of fluorothene and an oxhydryl vinyl ether, the weight percentage concentration of fluorin is from 8 percent to 11.5 percent, and a main chain comprises fluorin atoms. A preparation method comprises traditional methods of mixing, heating stirring and ultrasonic dispersion. The rust preventive has the advantages of good antirust effect, high temperature resistance, favorable adhesive attraction to polyester powder coatings, and the like and can satisfy the antirust requirements of a metal outer casing and a treaded cover plate of the filter. The preparation method is technically simple and uses less equipment.

Description

Water-based antirust agent for filter and preparation method thereof technical field The invention relates to an antirust agent, more specifically, the invention relates to a water-based antirust agent for a filter, and at the same time, the invention also relates to a preparation method of the water-based antirust agent for a filter. technical background At present, filter manufacturers still use the traditional process of phosphating treatment (mainly zinc phosphating) for the rust prevention of the metal shell of the filter. The phosphating solution can form a phosphating film on the metal shell. After phosphating treatment, the outer wall of the metal shell is sprayed with polyester powder coating, and the phosphating film is used as the final surface state of the inner wall of the metal shell. The part connected with the open end of the metal shell of the filter is a threaded cover plate, which is connected with the shell by crimping. The threaded cover plate is made...

AI Technical Summary

Problems solved by technology

50-60 parts by weight of hydroxyalkyl starch

40-50 parts by weight of acetate starch