High-temperature-resistant corrosion-resistant coating for engineering machinery tail gas pipe

Abstract

The invention discloses a high-temperature-resistant corrosion-resistant coating for an engineering machinery tail gas pipe. The coating comprises the following components in percentage by weight: 55 to 65 percent of organic silicon epoxy resin polymer, 1 to 2 percent of salt mist resistant aid, 6 to 10 percent of copper ferrochrome black, 2 to 5 percent of nano zinc oxide, 6 to 3 percent of flaky mica powder, 7 to 4 percent of aluminium trippolyhosphate, 0.1 to 0.4 percent of leveling agent, 0.2 to 0.6 percent of defoaming agent, 0.2 to 0.6 percent of dispersing agent, 4 to 6 percent of talcpowder and 18.5 to 3.4 percent of dimethylbenzene. The bond strength of the coating to a substrate is obviously improved; high temperature resistance can reach 500 DEG C; the coating can resist salt mist corrosion for 48 to 72 hours; and the coating is still black and is slightly faded after being roasted at the temperature of 500 DEG C for 100 hours. The coating is convenient to construct and operate, has wide material sources, and can be applied to resisting corrosion on the outer surfaces of various kinds of steel structure high-temperature equipment, engineering machinery tail gas pipes and steel structure high-temperature chimneys.

Description

[0001] technical field [0002] The invention relates to a coating, in particular to a high-temperature-resistant and anti-corrosion coating for an engineering machinery tail gas pipe. The coating has the effects of high temperature resistance, oxidation resistance and corrosion resistance on the surface of the engineering machinery tail gas pipe. Background technique [0003] Exhaust pipes of construction machinery generally need to withstand high temperatures of several hundred degrees Celsius. Under the corrosion of high temperature and sulfur-containing gases, the materials of the exhaust pipes are prone to corrosion. life. At present, the high-temperature resistant anti-corrosion coating used on the surface of the exhaust pipe of construction machinery, although the heat resistance of the coating can reach 500 ° C, but in the actual use process, the corrosion resistance of the coating is low, and the corrosion resistance of salt spray is only 24 hours. The coating is p...

AI Technical Summary

Problems solved by technology

At present, the high-temperature resistant anti-corrosion coating used on the surface of the exhaust pipe of construction machinery, although the heat resistance of the coating can reach 500 ° C, but in the actual use process, the corrosion resistance of the coating is low, and the corrosion resistance of salt spray is only 24 hours. The coating is prone to rust and discoloration after use