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1、涂裝常見缺陷分析分析漆膜硬度不夠(weak):描述(DESCRIPTION)表現(xiàn)為漆膜軟,很容易被劃傷;相應的耐溶劑性能表現(xiàn)差。9/15/20212原因(cause):通常是漆膜樹酯交鏈不夠好,而交鏈不夠的主要因素有:1樹酯分子選擇不合適;2未完全干燥;3高溫漆或雙組份漆烘烤溫度不夠;4雙組份漆固化劑配比不對。9/15/20213起泡(blowing):9/15/20214起泡的原因(cause):通常是基底有銹跡(擴大)、污垢、小凹孔、磷化渣質、水汽等被封在漆膜底下,漆膜在烤干或受熱(受熱膨脹)時,這些物質彭漲將漆膜頂起造成。9/15/20215起泡的
2、原因:底下有Money!9/15/20216溶劑泡(SolventPopping)描述(DESCRIPTION)新噴漆膜表面有直徑小于1MM的小氣泡。Opentoppedblistersupto1mmindiameteronthesurfaceofthemostrecentlyappliedpaintfilm.9/15/20217溶劑泡(SolventPopping)起因(CAUSE)Airorsolventvapourtrappedbyfastdryingpaintformingaskin.Thismaybedueto:a)天那水太差或太快干。poor
3、qualityortoofastthinner.b)噴得太厚或兩層漆之間干燥時間不夠。excessivefilmthickness,orinsufficientdryingtimebetweencoats.c)壓縮空氣壓力太低。compressedairpressuretoolow.d)加熱太快。dryingtemperaturetoohigh,heatsourcetooclosetothefilm,toohot,orappliedtoosoon.9/15/20218溶劑泡(SolventPopping)預防(PREVENTION)a)確保工件表面清潔E
4、nsurethatthesurfaceisscrupulouslyclean.b)使用合適的天那水。Useonlyrecommendedthinner.c)每層漆膜厚度合適,并適當閃干Applypaintinthin,wetfilms.Allowsufficientdryingtimebetweencoats.d)使用正確的噴漆壓力Usecorrectcompressedairpressure.e)烘烤前適當流平,避免加熱過快,熱源過近。Allowsufficientflashofftimebeforeforcedrying,ensurethatthec
5、orrectdryingtemperatureisnotexceeded.Donotallowtheheatsourcetobeplacedtooclosetothesurface.9/15/20219針孔(Pinholing)描述(DESCRIPTION)小凹穴,通常直徑小于1MM。Smallcavities,generallylessthan1mmindiameter,9/15/202110針孔(Pinholing)預防(PREVENTION)a)一次不要噴得太厚。Donotspraytoothickonetime,b)烘烤之前適當流平。Flashi
6、ngthefilmbeforebaking.c)使用涂料廠商推薦的附料。Useonlyrecommendedmaterials.d)正確調配油漆,使用較慢干稀釋劑。Mixthepaintcorrectly,useslowdrythinner.E)保持底材干凈。)Keepmaterialsclean.9/15/202111魚眼/FishEyes(cissing)好可愛噢,真的象魚眼睛呢!9/15/202112產生魚眼的原因(cause):放大之后中間有核,通常是*素材被含硅silicon類的物質污染。*素材未很好清潔。*裸手接觸工件。*油漆一次噴涂太濕。*
7、油漆體質敏感。9/15/202113預防(PREVENTION)魚眼的產生KeepthepartawayfromsiliconepollutionThoroughlycleanthesurfacewithwaxandgreaseremover.Donotallowcleaningsolventstodryonthesurfacebutremovewithacleandrycloth,Alwaysusetherecommendedmaterials.Ensurethatthesprayingareaisproperlyventilated.9/15/202
8、114與魚眼相似的其它缺陷1.水泡(blister)工件表面被濺上水珠。你見過