| No. | LX content | Salt spray resistance property |
| 1 | 0.2% | 2 h |
| 2 | 0.5% | 4 - 6 h |
| 3 | 1% | 6 - 8 h |
| 4 | 1.5% | <24 h |
| 5 | 2% | 24 - 48 h |
| 6 | 3% | 32 - 55 h |
| 7 | 5% | 48 - 60 h |
| 8 | 7% | 96 - 120 h |
| 9 | 10% | coating scorc hed |
| 10 | Hexavalent chromium (micro cracks agent) | 72 - 96 H |