International Scholarly Research Notices / 2012 / Article / Tab 2

Research Article

Optimization of Multiple Roughness Characteristics of Chemically Deposited Ni-P-W Coating Using Weighted Principal Component Analysis

Table 2

Design factors and their levels.

Design factorsUnitLevels

Concentration of source of nickel (nickel sulphate solution) (A)g/L20 2 5 a 30
Concentration of reducing agent (sodium hypophosphite solution) (B)g/L14 1 7 a 20
Concentration of source of tungsten (sodium tungstate solution) (C)g/L15 2 0 a 25

a Initial-coating condition.

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