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Stains on and discolouration of surface of base material

Slight discolouration of base material

Description:
This sample has been subjected to one heat cycle (soldering).

Causes/Remedy:
  • thermal stress

Source: visual, optical inspection - general view
Slight discolouration of base material due to thermal stress

Medium discolouration of base material

Description:
Diese Probe hat drei Wärmezyklen (Löten) erlebt.

Causes/Remedy:
  • excessive thermal stress
  • unsuited for several soldering cycles

Source: visual, optical inspection - general view
heavy discolouration of base material due to thermal stress

Extreme discolouration of base material

Description:
This sample has been subjected to three heat cycles (soldering)

Causes/Remedy:
  • excessive thermal stress
  • unsuited for several soldering cycles

Source: visual, optical inspection - general view
extreme discolouration of base material due to thermal stress
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