Typical failures on anodised profiles and how to avoid them (Topic: 14043)

Typical failures visible after anodising - or earlier in the process- are as follows:

- spangling

- fingerprint corrosion

- spalling

- black spotting

- white spots

- fretting corrosion

- transverse welds

- contamination with other alloys

- die design streaks

- acid or alkali corrosion

- water staining

- etch staining

- sealing bloom

These failures and how to avoid them, will be described below.