Polish
Background
An NCM producer reported accelerated roller degradation near a specific temperature zone.
Unexpectedly, the hottest section of the kiln showed relatively little damage.
Findings
The most severe corrosion occurred around 700–800°C.
This region coincided with:
- Lithium vapor exposure
- Active chemical reactions
- Lithium silicate formation
Root Cause Analysis
At this temperature range:
- Protective silica layers became unstable
- Lithium compounds reacted aggressively
- Corrosion products formed rapidly
This created a high-risk corrosion zone.
Engineering Insight
The most dangerous temperature is not always the highest temperature.
Intermediate reaction zones can produce far more severe material degradation.
Related Reading
SiC Roller Corrosion in LFP vs NCM Production Environments
Layer-by-Layer Corrosion Mechanism of SiC in Lithium Environments
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