飞机结构件的表面保护处理

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1、飞机结构件的表面保护处理Surfaceprotectionofairplanestructuralparts一-aluminumalloyandtitaniumalloycorrosiontreatmenttechnologydirectoryThefirstchapteronthesurfacetreatmentofaircraftstructuresisoutlinedChapteriicorrosiontreatmenttechnologyofaluminumalloyTheprocessofcorrosionpreventionofstee

2、ltitaniumalloyChapterivprocessofthealodinprocessingofBoeingaircraftChaptervnoticeofsurfacetreatmentThefirstchapteronthesurfacetreatmentofaircraftstructuresisoutlinedItisthemosteffectiveanti-corrosionmeasuretoapplythesurfaceprotectionlayertothestructureorattachmentoftheaircraft

3、・Thedirectcauseofcorrosionisthatthecomponenthasnoproperprotectivecoatingorprotectivecoating・Topreventcorrosion,themetalcomponentsusedintheaircraftstructurearecoatedwithcorrosionprotection.Thesurfacetreatmentprocessofaluminumalloyismainlydividedintopurealuminumandtwokindsofoxid

4、ationfilmsonthesurface.ThesurfacetreatmentofsteeltitaniumalloyismainlyonthesurfaceplatingmetalprotectionlayerChapteriicorrosiontreatmenttechnologyofaluminumalloyThesurfacetreatmentprocessofaluminumalloyismainlydividedintopurealuminumandtwokindsofoxidationfilmsonthesurface・1.Pu

5、realuminumUsingpurealuminiumrollingbyrollingprocessonthesurfaceofhardaluminumalloyaircraftcoin,purealuminumandaluminumalloytogether,formawhole,thisprocessiscalledpurealuminumcladding・Purealuminumandoxygenhavestrongeraffinity,soonwithoxygen,generateA1203film,thefilmnotonlyhasas

6、moothsilverappearance,andaprotectiveoxidefilmshouldhaveallthecharacteristicsofprotectaluminumalloyfromoxidation・Thealuminumcoatingisusually1.5to5percentthick・For7075superhardaluminum,youshouldhaveanaluminumzincalloywith1%zincontheoutside,notaluminum・Becauseintheelectrolyte,707

7、5electrodesarelowerthanpurealuminum.ThecoatingofpurealuminumismainlycarriedoutbyairplanemanufacturersThesurfacetreatmentprocessthatwecommonlyuseinmdintermnceisthemethodofproducingtheoxidationfilmonthesurfaceofaluminumalloy.Therearetwowaysofproducinganoxidationfilmonthesurfaceo

8、faaluminumalloy.Oneisbyelectrolysis,whichisAnodizing・Anotheri