Zn-Cu alloy coatings were prepared by arc spraying technology on plaster substrates

and orthogonal experimental design was performed to analyze effects of the spraying parameters on micro-hardness

porosity and wear mass loss of the sprayed coatings.The results reveal that the spraying voltage is the most significant factor affecting microhardness of the coating

while spraying current is the most significant factor affecting the porosity and wear mass loss of the coating in the experimental range.The optimized spraying parameters are presented as follows:spraying voltage of 30 V

spraying current of220 A

spraying distance of 340 mm and spray pressure of 0.7 MPa.The Zn-Cu alloy coating produced with the optimized parameters exhibits the typical meshwork structure with satisfied synthesis performance

where the microhardness is 150.8 HV

the porosity is 6.4%

and the wear mass loss reaches0.005 5g.