System D — Saturn Ring

Surface Treatment Knowledge Hub

Coating Thickness · Salt Spray Resistance · HDG / EG / Zinc Flake Comparison

Finish Types Overview

⚡ Electroplated Zinc (Zn)
Thickness3–8 µm
Salt Spray24 h
Max Temp120 °C
HE Risk⚠️ Yes
🟡 Yellow Zinc
Thickness5–11 µm
Salt Spray72 h
Max Temp120 °C
HE Risk⚠️ Yes
🔥 Hot-Dip Galvanizing
Thickness40–80 µm
Salt Spray200 h
Max Temp250 °C
HE Risk✅ No
🛡️ Zinc Flake (Dacromet)
Thickness5–12 µm
Salt Spray240 h
Max Temp300 °C
HE Risk✅ No
🧪 Phosphate
Thickness5–15 µm
Salt Spray24 h
Max Temp200 °C
HE Risk⚠️ Yes
⚫ Black Oxide
Thickness0.5–2.0 µm
Salt Spray4 h
Max Temp130 °C
HE Risk✅ No
🔩 Nickel Plating
Thickness5–20 µm
Salt Spray48 h
Max Temp200 °C
HE Risk⚠️ Yes
✨ Chromium Plating
Thickness10–30 µm
Salt Spray96 h
Max Temp400 °C
HE Risk⚠️ Yes
🔒 Passivation
Thickness0–0.1 µm
Salt Spray200 h
Max Temp400 °C
HE Risk✅ No

Performance Comparison

Finish Type Thickness (µm) Salt Spray (h) Max Temp (°C) HE Risk Thread Class
⚡ Electroplated Zinc (Zn) 3–8 24 120 ⚠️ Yes 6g
🟡 Yellow Zinc 5–11 72 120 ⚠️ Yes 6g
🔥 Hot-Dip Galvanizing 40–80 200 250 ✅ No 6az
🛡️ Zinc Flake (Dacromet) 5–12 240 300 ✅ No 6g
🧪 Phosphate 5–15 24 200 ⚠️ Yes 6g
⚫ Black Oxide 0.5–2.0 4 130 ✅ No 6g
🔩 Nickel Plating 5–20 48 200 ⚠️ Yes 6g
✨ Chromium Plating 10–30 96 400 ⚠️ Yes 6g
🔒 Passivation 0–0.1 200 400 ✅ No 6g

Constraint Rules

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