Research Article
Optimization of Multiple Roughness Characteristics of Chemically Deposited Ni-P-W Coating Using Weighted Principal Component Analysis
Table 1
L27 Orthogonal array with design factors and interactions.
| | | Column numbers | | Trial no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | | (A) | (B) | () | (A B) | (C) | (A C) | (A C) | (B C) | — | — | (B C) | — | — | |
| |
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
| |
2
|
1
|
1
|
1
|
1
|
2
|
2
|
2
|
2
|
2
|
2
|
2
|
2
|
2
| |
3
|
1
|
1
|
1
|
1
|
3
|
3
|
3
|
3
|
3
|
3
|
3
|
3
|
3
| |
4
|
1
|
2
|
2
|
2
|
1
|
1
|
1
|
2
|
2
|
2
|
3
|
3
|
3
| |
5
|
1
|
2
|
2
|
2
|
2
|
2
|
2
|
3
|
3
|
3
|
1
|
1
|
1
| |
6
|
1
|
2
|
2
|
2
|
3
|
3
|
3
|
1
|
1
|
1
|
2
|
2
|
2
| |
7
|
1
|
3
|
3
|
3
|
1
|
1
|
1
|
3
|
3
|
3
|
2
|
2
|
2
| |
8
|
1
|
3
|
3
|
3
|
2
|
2
|
2
|
1
|
1
|
1
|
3
|
3
|
3
| |
9
|
1
|
3
|
3
|
3
|
3
|
3
|
3
|
2
|
2
|
2
|
1
|
1
|
1
| |
10
|
2
|
1
|
2
|
3
|
1
|
2
|
3
|
1
|
2
|
3
|
1
|
2
|
3
| |
11
|
2
|
1
|
2
|
3
|
2
|
3
|
1
|
2
|
3
|
1
|
2
|
3
|
1
| |
12
|
2
|
1
|
2
|
3
|
3
|
1
|
2
|
3
|
1
|
2
|
3
|
1
|
2
| |
13
|
2
|
2
|
3
|
1
|
1
|
2
|
3
|
2
|
3
|
1
|
3
|
1
|
2
| |
14
|
2
|
2
|
3
|
1
|
2
|
3
|
1
|
3
|
1
|
2
|
1
|
2
|
3
| |
15
|
2
|
2
|
3
|
1
|
3
|
1
|
2
|
1
|
2
|
3
|
2
|
3
|
1
| |
16
|
2
|
3
|
1
|
2
|
1
|
2
|
3
|
3
|
1
|
2
|
2
|
3
|
1
| |
17
|
2
|
3
|
1
|
2
|
2
|
3
|
1
|
1
|
2
|
3
|
3
|
1
|
2
| |
18
|
2
|
3
|
1
|
2
|
3
|
1
|
2
|
2
|
3
|
1
|
1
|
2
|
3
| |
19
|
3
|
1
|
3
|
2
|
1
|
3
|
2
|
1
|
3
|
2
|
1
|
3
|
2
| |
20
|
3
|
1
|
3
|
2
|
2
|
1
|
3
|
2
|
1
|
3
|
2
|
1
|
3
| |
21
|
3
|
1
|
3
|
2
|
3
|
2
|
1
|
3
|
2
|
1
|
3
|
2
|
1
| |
22
|
3
|
2
|
1
|
3
|
1
|
3
|
2
|
2
|
1
|
3
|
3
|
2
|
1
| |
23
|
3
|
2
|
1
|
3
|
2
|
1
|
3
|
3
|
2
|
1
|
1
|
3
|
2
| |
24
|
3
|
2
|
1
|
3
|
3
|
2
|
1
|
1
|
3
|
2
|
2
|
1
|
3
| |
25
|
3
|
3
|
2
|
1
|
1
|
3
|
2
|
3
|
2
|
1
|
2
|
1
|
3
| |
26
|
3
|
3
|
2
|
1
|
2
|
1
|
3
|
1
|
3
|
2
|
3
|
2
|
1
| |
27
|
3
|
3
|
2
|
1
|
3
|
2
|
1
|
2
|
1
|
3
|
1
|
3
|
2
|
|
|
