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通过差示扫描量热(DSC)、X射线衍射(XRD)、扫描电镜(SEM)、电化学实验和失重实验研究了热处理对化学沉积Ni Zn(Fe) P合金结构、显微硬度、表面形貌和耐蚀性的影响。镀态镀层由非晶相和立方镍相组成(多晶态结构),在384.8℃晶化为四方Ni3P和Ni5Zn12相。镀层显微硬度随热处理温度升高而升高,相反地, 500℃后随热处理温度升高而下降。在3.5%(质量分数)NaCl溶液中(pH7.0)镀态镀层的耐蚀性比经热处理过的镀层好。
The effects of heat treatment on the structure, microhardness and surface morphology of the as-deposited Ni Zn (Fe) P alloy were studied by means of DSC, XRD, SEM, electrochemical and weight loss experiments. Appearance and corrosion resistance. Plating The coating is composed of an amorphous phase and a cubic nickel phase (polycrystalline structure) and is crystallized to tetragonal Ni3P and Ni5Zn12 phases at 384.8 ° C. The microhardness of the coating increases with the increase of the heat treatment temperature. On the contrary, the microhardness of the coating decreases with the increase of the heat treatment temperature after 500 ℃. In 3.5% (mass fraction) NaCl solution (pH 7.0), the plated coating has better corrosion resistance than the heat treated coating.