Surface Finishing for Aluminum 7075-T6

7075 aluminum anodizes differently than 6061 — it tends toward yellow/brown hues and does not color as vibrantly. Chromate conversion and hardcoat are more common finishes.

Recommended Machining Parameters

ParameterValue
Achievable Tolerances±0.005 mm (finished)
Surface FinishRa 0.4-3.2 μm
Cutting SpeedN/A
Feed RateN/A
Tooling RecommendationsN/A — surface finishing process

Expert Machining Tips

1

Expect darker/yellower anodize than 6061

2

Hardcoat (Type III) works well

3

Chromate conversion preferred for aerospace

4

Clear anodize may have a slight yellow tint

Common Parts Made

Chromated aerospace parts

Hardcoated wear surfaces

Clear anodized defense components

Machining Challenges

  • Anodize color less vibrant than 6061
  • Zinc content affects color consistency
  • Not ideal for colored decorative anodize

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