Study of chemical Ni-P plating technology on bridge bearing spherical calotte
Mainly studied different chemical Ni-P plating process routes on bridge bearing spherical calotte.The results show that when the roughness of base materials Ra≤0.12 pm,P content is 12%,plating time is 4 h,the process route is the best rout,and different heat treatment process and roughness of base material would affect chemical Ni-P plating's hardness,corrosion resistance and thickness measurement.When heat treatment temperature is 200 ℃,plating become more harder slightly,corrosion resistance no change.When heat treatment temperature is 360 ℃,plating become more harder obviously.Corrosion resistance become more worse obviously.When roughness of base materials Ra≥1.6,corrosion resistance become more worse obviously.
chemical Ni-P platingheat treatmentroughnesshardnessthicknesscorrosion resistance