Quality characteristics
| Treatment | Type | Elution of chromium | Corrosion resistance | Coefficient of dynamic friction | Contact resistance (grounded) | Fingerprint resistance | Alkali resistance | Solvent resistance |
|---|---|---|---|---|---|---|---|---|
| ZJ treatment | Organic | No elution | SST240h, white rust occurrence 10% or less | 0.1 | ΔL≤0.5 | ∞ |  |
|
| ZG treatment | Organic | No elution | SST240h, white rust occurrence 10% or less | 0.2 | ΔL≤0.5 | ∞ | |
|
| ZC treatment | Inorganic | No elution | SST72h, white rust occurrence 10% or less | 0.3〜0.4 | ΔL≤1.0 | 10-5〜10-4Ω | |
|
Elution of chromium: Amount of chromium elution measured after the specimen has been immersed for 3 minutes in boiling water
Corrosion resistance: Salt spray test (JIS Z2371)
Coefficient of dynamic friction: Reference sheet: SUS304BA, load: 0.98 N, sliding rate: 150 mm/min
Contact resistance value: Measured by the four-terminal, four-probe method (Dia Instruments MCP-TPO3P)
Corrosion resistance: Salt spray test (JIS Z2371)
Coefficient of dynamic friction: Reference sheet: SUS304BA, load: 0.98 N, sliding rate: 150 mm/min
Contact resistance value: Measured by the four-terminal, four-probe method (Dia Instruments MCP-TPO3P)
Alkali resistance: Appearance after immersion for 2 minutes in alkali degreasing agent (Nippon Paint SD-270) adjusted to pH of 12 and a temperature of 40°C
Fingerprint resistance: Difference in brightness (ΔL) before and after impression with artificial finger-smudge solution (JIS K2246)
Solvent resistance: Appearance after immersion for 2 minutes in acetone
(Evaluation standard for alkali resistance and solvent resistance/ ○ : No change, △ : Some discoloration, × : Film peeling)
Fingerprint resistance: Difference in brightness (ΔL) before and after impression with artificial finger-smudge solution (JIS K2246)
Solvent resistance: Appearance after immersion for 2 minutes in acetone
(Evaluation standard for alkali resistance and solvent resistance/ ○ : No change, △ : Some discoloration, × : Film peeling)
