Testing Seal Coatings: Adhesion, DFT & Pinholes
封护层检测：附着力、膜厚与针孔
标签：附着力, 划格法, 膜厚, 针孔检测, 质检
封护质检三项硬指标：①附着力——划格法（ISO 2409 / GB/T 9286）≤1 级，工程件加做拉拔法（ISO 4624）≥2 MPa；②膜厚——铜为非磁性基体，用涡流法（ISO 2360）测，每构件 10 点取均值并留存点位照片，单点不得低于设计值 80%；③针孔——低压湿海绵法（≤90 V）扫涂装面，针孔点用毛笔点补而非整体重喷。三项数据绑定构件二维码归档，五年复护时调档比对首次数据，可直接量化涂层的退化速率。
Three hard QC numbers for seal coatings: adhesion by cross-hatch (ISO 2409 / GB/T 9286) ≤1, plus pull-off (ISO 4624) ≥2 MPa on structural work; dry-film thickness by eddy current (ISO 2360 — copper is non-ferrous), 10 points per component averaged with photographed locations, no single point under 80% of spec; and pinholes by low-voltage wet sponge (≤90 V), spotting repairs by brush rather than full re-spray. Archive all three against each component QR code so a five-year recoating survey can compare against first-day data and quantify the coating degradation rate.