在不锈钢水轮机母材上，用周期反相电镀稀土铬，镀层厚度 约03 mm，镀层由金属基相和稀土盐颗粒第二相组成，硬度为900 Hv～1000 Hv.阳极极化 曲线测量表明：镀层的腐蚀阻力为母材的7～8倍.在模拟式小水轮机上考核，镀层的抗磨蚀 性为母材的25～28倍，为离子氮化不锈钢的10～12倍.在水电生产中应用，电镀水轮机的工 作寿命比原不锈钢高2～6倍.
Plating rare earth chromium on stainless steel appl ied in hydraulic turbine,by means of the operation converting electrodes periodi cally,was carried out.The plating layer consists of metallic matrix and second p hase particles of rare earth sulphates or carbonates,its thickness is about 0.3m m,its microhardness is from Hv900 to 1000.The results of anodic polarization cur ves indicate that the corrosive resistance of plating layer is 7～8 times to tha t of stainless steel substrates.When an imitating small hydraulic turbine made u p of different materials was rotated in the slurry of 60% water and 40% sands,th e resistance of plating layer to cavitation erosion and abrasion is about 28 tim es to that of stainless steel,and is 10～12 times to that of plasma-nitrided sta inless steel.The results of hydraulic electricity generation indicate the servic e life of plated hydraulic turbine is 3～6 times to that of stainless steel hydr aulic turbine.
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