Features of GT STORM Mg
No painting required !
Excellent coating of black oxide on magnesium alloy material can be implemented in GT STORM technology.
Beautiful appearance !
GT STORM is able to obtain excellent surface without being affected by Mg alloy defect.
Characteristics of oxide film !
- Thickness
- adjustable, 10 to 50 μm (excellent uniformity)
- Hardness
- 300 Hv ~ (standard: 10-15 μm)
- Corrosion resistance
- Salt spray test 72 h ~ (standard: 30μｍ)
Comparison with chemical conversion treatment
| Process | Environmental load | Corrosion Resistance | Appearance | |
|---|---|---|---|---|
| Conventional （Chemical conversion treatment + Painting） |
× | × | ○ | ○ |
| GT STORM | ○ | ○ | ○ | ○ |
Comparison chart between GT STORM and chemical conversion treatment
| Processing method | Thickness | Corrosion Resistance （Salt spray test） |
Conductivity | Hardness | Surface Roughness | Glossiness (60°) |
|
|---|---|---|---|---|---|---|---|
| GT STORM No gloss |
Anodizing | 30μm | 200h (RN9.0) (72h No corrosion) |
No corrosion | 400～600Hv | Ra 1.0～1.5um | 0.5～0.6% |
| GT STORM Semi-gloss |
Anodizing | 15μm | 24h Corrosion rate less than 1% |
No corrosion | 400～600Hv | Ra 0.4～0.6um | 1.2～1.6% |
| Chemical conversion treatment | Chemical conversion treatment | Less than 0.1μm | 24h Corrosion rate less than 1% |
Less than 1Ω | - | - | - |
Durable test result
High corrosion-resistance of black color to Mg die-casting !
| Test name | Salt spray test | Cass test | temperature & humidity test |
Cross cut | Boiling water test |
|---|---|---|---|---|---|
| Test method | JIS Z2371 Salt spray test |
JIS H8502 Cass test |
45℃ 95% | Taping | Over 90℃ 2H |
| GT STORM No gloss | 72H | 24H | 2000H ※No change |
100/100 No peeling |
OK |
| Chemical conversion treatment + Painting |
240H | - | - | 100/100 No peeling |
OK |
| Chemical conversion treatment |
24H | - | 480H ※No change |
100/100 No peeling |
Color changed |
