The invention relates to an
electric arc spraying wire as well as preparation and spraying methods thereof. A
coating layer is prepared by adopting an
electric arc spraying process. A spraying material is an aluminum based
ceramic powder core wire, and a spraying matrix material is a steel or aluminum material, wherein the spraying material is in an aluminum sheet coated
ceramic powder core structure, the outer
diameter of the wire is phi 2mm, the
ceramic powder core is prepared by mixing micron-scale Al2O3, nano-scale Al2O3, micron-scale SiO2 and nano-scale SiO2, an aluminum strip is folded into a U shape by virtue of a forming mold, then is uniformly filled into the ceramic powder core, coats the powder core closely by virtue of a mold, and is drawn into a spraying wire with the outer
diameter of phi 2mm, and the ceramic powder core accounts for 20-38% of the
mass content of the wire. A test result satisfy that the
static friction coefficient of the
coating layer is more than 0.9, the
bonding strength is more than or equal to 20MPa, and bubbling failures are avoided by virtue of a 360h salt spray
corrosion test, so that application requirements can be well met.