Metal-ceramic coating resistant to molten zinc corrosion and preparation method thereof

Abstract

The embodiment of the invention discloses a metal-ceramic coating resistant to molten zinc corrosion and a preparation method of the metal-ceramic coating resistant to molten zinc corrosion. The preparation method comprises the following steps of preparing high-entropy alloy powder, wherein the components including, by mass percentage, 1.96%-2.9% of aluminum, 24.06%-48.73% of iron, 17.11%-25.35% of nickel, 17.11%-25.35% of cobalt and 15.09%-22.34% of chromium are prepared into AlFeNiCoCr high-entropy alloy powder; preparing metal-ceremic powder, wherein the AlFeNiCoCr high-entropy alloy powder, FeB and Mo are prepared into FeB-Mo-AlFeNiCoCr metal-ceramic powder, and the mass percentage content of the AlFeNiCoCr high-entropy alloy powder is 12%, the mass percentage content of the FeB is 73%-83%, and the mass percentage content of the Mo is 5%-15%; and preparing the metal ceramic coating, wherein the FeB-Mo-AlFeNiCoCr metal-ceramic powder is subjected to activated combustion high-velocity air-fuel spraying, and the metal-ceramic coating is obtained. According to the preparation method, the molten zinc corrosion resistance of the metal-ceramic coating is improved, and meanwhile, the wear resistance is also improved.

Description

technical field [0001] The invention relates to the technical field of metal corrosion and protection, in particular to a method for preparing a molten zinc corrosion-resistant cermet coating and a molten zinc corrosion-resistant cermet coating. Background technique [0002] Hot-dip galvanizing is one of the most economical and effective methods to protect steel and other metal materials from corrosion in the atmospheric environment. Hot-dip galvanized products are widely used in plates, Tubes, wires, belts and hardware and electrical parts. However, due to the strong corrosiveness of molten zinc to almost all single metals and most alloys, metal melt corrosion has always been a worldwide problem in the galvanizing industry; especially equipment or components immersed in metal melt , being strongly corroded and worn by the metal melt, resulting in frequent replacement of equipment and decreased production efficiency, which not only brought huge economic losses, but also cau...

AI Technical Summary

Problems solved by technology

[0005] The preparation method of the molten zinc corrosion-resistant cermet coating provided in this example is prepared by preparing aluminum, iron, nickel, cobalt and chromium as AlFeNiCoCr high-entropy alloy powder, and then preparing the AlFeNiCoCr high-entropy alloy powder, FeB and Mo It is FeB-Mo-AlFeNiCoCr cermet powder, and then the FeB-Mo-AlFeNiCoCr cermet powder is subjected to active combustion high-speed gas spraying to obtain a cermet coating; wherein, FeB, as a hard phase, has good corrosion resistance; Mo And AlFeNiCoCr high-entropy alloy as the bonding phase, AlFeNiCoCr high-entropy alloy can improve the brittleness of borides, the wettability between Mo and Zn is poor, and there is no eutectic reaction with Zn at 450 ° C, and it has good wear resistance. The FeB-Mo-AlFeNiCoCr cermet coating prepared in this way can solve the problem of poor molten zinc corrosion resistance of the binder phase in traditional cermet coating materials, thereby improving the resistance of the FeB-Mo-AlFeNiCoCr cermet coating. Molten zinc corrosion performance while also improving wear resistance

Images