Extrusion & Post
4 조회수
Pinhole defects in the coating layer
문제 현상
Dense pinholes appear in the powder coating, causing corrosion protection failure
원인 분석
The raw material contains water, the solvent volatilizes quickly, the substrate is contaminated, and the curing is too fast
해결 방법
Pre-dry the powder at 80-100C for 2h, substrate Sa2.5, stepwise temperature rise
핵심 요약
Pinholes are the starting point of corrosion protection failure
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