Studi perilaku korosi paduan Zr-xMo dan Zr-yNb yang diproduksi melalui metalurgi serbuk di dalam larutan kokubo simulated body fluid, larutan ringer dan larutan NaCl 3,5% untuk aplikasi biomaterial = Study of corrosion behavior of Zr-xMo and Zr-yNb alloy produced by powder metallurgy in kokubo simulated body fluid, solution ringer solution and NaCl 3,5% solution for biomaterial application / Niken Anggraini