Journal of Applied Sciences and Nanotechnology

Abstract

The purpose of this study is to optimize the hot corroded pack coated Ni-based super alloy K417G using composite desirability. Pack cementation parameters optimization was performed using quality characteristics of diffusion coatings for pack cementation process, i.e. salt activator, Nano-powders master alloy powder and wt.% Ge. Analysis of variance (ANOVA) was used for observing the most influencing pack cementation parameters on the quality characteristics, i.e. Na₂So₄-6% wt. V₂O₅ (kp1), 100 wt% NaSO₄ (kp₂), and 75 wt. % NaSO₄-25 wt % NaCl (kp₃). A confirmation test was performed after the optimal process parameters were determined using composite desirability analysis. Based on analysis of variance results, the wt.% of Geis the most significant controllable diffusion coating factor for the hot corroded pack coated K417G at optimum setting conditions (A2, B1, C3) i.e. activator (NaCl), master alloy (90Cr-10Al) and wt.% of Ge (2%) according to the quality characteristics. Composite desirability was successfully applied on optimization of hot corroded pack coated K417G using multi-performance characteristics.