The specific distribution characteristics of inclusions along with the sliver defect were analyzed in detail to explain the formation mechanism of the sliver defect on the automobile exposed panel surface. A quantitative electrolysis method was used to compare and evaluate the three-dimensional morphology, size, composition, quantity, and distribution of inclusions in the defect and non-defect zone of automobile exposed panel. The Al₂O₃ inclusions were observed to be aggregated or chain-like shape along with the sliver defect of about 3–10 µm. The aggregation sections of the Al₂O₃ inclusions are distributed discretely along the rolling direction, with a spacing of 3–7 mm, a length of 6–7 mm, and a width of about 3 mm. The inclusion area part is 0.04%–0.16% with an average value of 0.08%, the inclusion number density is 40 mm⁻² and the inclusion average spacing is 25.13 µm. The inclusion spacing is approximately 40–160 µm, with an average value of 68.76 µm in chain-like inclusion parts. The average area fraction and number density of inclusions in the non-defect region were reduced to about 0.002% and 1–2 mm⁻², respectively, with the inclusion spacing of 400 µm and the size of Al₂O₃ being 1–3 µm.

详细分析了夹杂物的特定分布特征以及银条缺陷，以解释汽车暴露面板表面上银条缺陷的形成机理。采用定量电解方法比较和评估了汽车裸板缺陷和非缺陷区的三维形态，尺寸，组成，数量和夹杂物分布。观察到Al ₂ O ₃夹杂物为聚集或链状，并伴有约3–10 µm的银条缺陷。Al ₂ O ₃的聚集部分夹杂物沿轧制方向离散分布，间距为3–7 mm，长度为6–7 mm，宽度约为3 mm。夹杂物面积部分为0.04％〜0.16％，平均值为0.08％，夹杂物数密度为40mm ^-2，夹杂物平均间隔为25.13μm。夹杂物的间距约为40–160 µm，链状夹杂物的平​​均值为68.76 µm。无缺陷区域中夹杂物的平​​均面积分数和数量密度分别降低至约0.002％和1-2 mm ^-2，夹杂物间距为400 µm，Al ₂ O ₃的尺寸为1-3微米