激光清洗重叠率对5A06铝合金表面形貌与腐蚀性能的影响.pdfVIP

HotWorkingTechnology2022,Vol.51,No.18

激光清洗重叠率对5A06铝合金表面形貌

与腐蚀性能的影响

文婷，陈辉，汪倩，王非森，张鸿羽，廖大松

（西南交通大学材料科学与工程学院，四川成都610031)

摘要：通过调节脉冲频率和扫描间距控制激光重叠率为0%、20%、40%、60%、80%激光清洗5A06铝合金表面，分

析了不同重叠率激光清洗铝合金的表面形貌、元素分布、化学成分以及腐蚀性能的变化。结果表明，激光清洗后铝合金

表面氧含量随激光清洗重叠率的增加而降低，当激光清洗重叠率为80%时，表面氧含量较未清洗时降低了67.13%，表

面形貌及化学组成发生了变化，表面粗糙度得到提高。随激光清洗重叠率的增加，5A06铝合金的自腐蚀电流密度先升

高后降低，容抗弧半径先减小后增大，耐腐蚀性能先降低后增加。当激光清洗重叠率为80%时，铝合金表面耐蚀性优于

未清洗铝合金表面。

关键词：重叠率；激光清洗；5A06铝合金；化学成分；腐蚀性能

D0I:10.14158/ki.1001-3814

中图分类号：TG178.23;TG146.2+1文献标识码：A

EffectsofLaserCleaningOverlapRateonSurfaceMorphologyandCorrosion

Performanceof5A06AluminumAlloy

WENTing,CHENHui,WANGQian,WANGFeisen,ZHANGHongyu,LIAODasong

(InstituteofMaterialsScienceandEngineering,SouthwestJiaotongUniversity,Chengdu610031,China)

Abstract:Byadjustingthepulsefrequencyandscanningdistancetocontrolthelaseroverlaprateof0%,20%,40%,

60%,80%lasercleaning5A06aluminumalloysurface,thechangesinsurfacemorphology,elementdistribution,chemical

compositionandcorrosionperformanceoflasercleaningaluminumalloyswithdifferentoverlapratioswereanalyzed.The

resultsshowthatthesurfaceoxygencontentofaluminumalloyreduceswiththeincreaseoflasercleaningoverlaprate.When

thelasercleaningoverlaprateis80%,thesurfaceoxygencontentisreducedby67.13%comparedwiththeuncleanedstate,

andthesurfacemorphologyandchemicalcompositionchangeandthesurfaceroughnessimproves.Withtheincreaseoflaser

cleaningoverlaprate,theself-corrosioncurrentdensityof5A06aluminumalloyincreasesfirstandthendecreases,the

capacitivearcdecreasesfirstandthenincreases,andthecorrosionresistancefirst