又称油点（oilyspot）。涂膜暴露在户外时，其表面因老化而产生微小的空隙，同时，受阳光照射而变软，此时，易被灰尘或污垢所沾污，且不易用水洗去或擦掉，称为沾污。对涂膜，尤其是白色涂膜的外观影响较大。
n. contamination ; pollution
沾污险 Risk of Intermixture and Contamination ; risk of contamination ; Intermixture & Conramination Clause ; Intermixture and Contamination Risks
混杂、沾污险 Risk of Intermixture and Contamination ; Intermixture and Contamination Risk ; Rish of Intermixture and Contamination
放射性沾污 radiocontamination ; [核] [环境] radioactive contamination
钢锈沾污 steeling
酸性沾污 acid stain
无沾污膜 contaminant free film
沾污测量计 [核] contamination meter
沾污减少 pollution abatement
涂料沾污 offsetting
This step accelerates the balance of oxide action turnning to right, and copper ions contamination was effectively controlled too; Finally, compounds were taken out by turbulent slurry.
此过程加快了氧化反应顺利向右进行，并且有效的控制了铜离子的沾污；第四，浆料中的铜胺络合物被湍流的浆料带走。
参考来源 - 甚大规模集成电路铜布线工艺中化学机械抛光技术的研究The result indicates that sedimention speed of black liquor cws is 1.5 times than that of cws, and the tendency of slagging and fouling for black liquor cws is stronger than that of cws.
静态灰沉积试验结果表明，黑液浆灰渣的沉积速率约为常规浆的2.5倍，表明黑液浆沾污结渣倾向明显强于常规浆。
参考来源 - 黑液水煤浆沾污结渣机理及微观物化研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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