涂装常见缺陷分析.ppt

涂装常见缺陷分析;漆膜缺陷原因分类:;漆膜硬度不够（weak):;原因（cause)： ;起泡（blowing)：;起泡的原因(cause)：;起泡的原因：;溶剂泡（Solvent Popping ）;溶剂泡（Solvent Popping ）;溶剂泡（Solvent Popping ）;针孔（Pinholing）;针孔（Pinholing）;鱼眼/ Fish Eyes (cissing);产生鱼眼的原因(cause)：;预防(PREVENTION)鱼眼的产生;与鱼眼相似的其它缺陷 1.水泡(blister);与鱼眼相似的其它缺陷 2.油污(oil pollution);起云/斑纹,(Clouding / Mottling );起云/斑纹,(Clouding / Mottling );应力纹(mapping):;脏点/尘点/异色点(Dirt / threads / Bits) ;脏点/纤维/异色点（Dirt / threads / Bits）;脏点/纤维/异色点（Dirt / threads / Bits）;颗粒(particles)产生原因;纤维或毛丝：;当这类缺陷很多时， 怎么办？？;建议;干喷/异常光泽低（Dry spray/loss of gloss); 起因(CAUSE) Microscopic roughness of the surface which may result from: a)底漆太差或底漆未干就喷面漆. poor hold out of primer, or the application of topcoat over primer which is not thoroughly dry. b)稀释剂太差或加了不合适的添加剂. poor quality or incorrect thinner, or the use of additives in the paint. c) 素材前处理不当或喷漆手法不对. incorrectly prepared or poorly applied paint. d) 素材质量太差application over a poor substrate. e) 高湿低温时漆膜干燥太慢. excessively slow drying due to high humidity or low temperature. f) 溶剂蒸气在漆膜表面冷凝. solvent fumes or exhaust gases attacking the surface. g) 表面被污染. surface contamination by wax, grease, oil, soap or water.;预防（PREVENTION ） a) 选择正确种类和比例的稀释剂Use the correct proportion of recommended thinner. b) 正确的喷漆手法: 枪距, 扇形, 气压……Use correct spraying techniques, ensure that equipment is clean, set air pressure as low as possible, consistent with proper atomisation, spray from the correct distance. c) 使用合适的喷房, 确保喷房有良好的空气流通. Use a spray booth, and ensure that air circulation and extraction is at the correct velocity.;漆膜太薄Inadequate Colour Coverage;预防（PREVENTION） a) 使用合适的喷涂方法确保合适的漆膜厚度. Use the correct spraying technique, ensure even and adequate film thickness. b) 使用合适的治具, 合??的灯光照明; 特别注意难喷涂表面. Work under good lighting conditions in a properly sized spray booth, pay special attention to inaccessible areas. c) 确保漆料混合均匀. Ensure that the materials are thoroughly mixed. ;橘皮（Orange Peel ）