添加劑對硫酸鹽電鍍鎳過程及鍍層性能的影響研究.pdf

1、桂林理工大學碩士學位論文添加劑對硫酸鹽電鍍鎳過程及鍍層性能的影響研究姓名：黃曉曦申請學位級別：碩士專業(yè)：應用化學指導教師：李延偉201204AbstractNickelelectrodepositioniSoneofthemostimportantsurfacetreatmentsinelectroplatingindustryanditiswidelyappliedindecorationmanufacture，mouldfabric

2、ationowingtoitsexcellentwearandcorrosionresistanceHowever、ⅣitlltherapiddevelopmentofmodemhightechnologyincreasinglyhighdemandstothequalityandperformancesofnickeldepositsaleproposedinmanyemergingfieldsWeknowthatthetraditi

3、onalnickelelectroplatingprocessstillhassomedefectnowandtheresultofcontrollingtheperformanceofnickeldepositsisoftennotsatisfactorysolelybyoptimizingthematureprocessconditionsOnewaytosolvetheaboveproblemsisthestudyofthenic

4、kelplatingadditivesAlthoughmanyresearchesonnickelplatingadditiveshavebeendoneSOfarandalsosomeimportantprogresshavebeenmadeatthesametime，thefunctionlawofadditives，especiallythefunctionlawofsoleadditiveisstilllackofindepth

5、understandingThus，itissignificantlyimportanttodiscussthefunctionlawofsoleadditivesTheeffectofthreetypesofadditivesontheprocessandpropertiesofnickelelectrodepositionfromsulfateelectrolyteisinvestigatedinthistextandthesead

6、ditivesarebrighteners，wettingagentsandrareearthadditivesofnickelplating，whichsaccharin1，4一butynediol，sodiumlaurylsulfate，eetyltrimethylammoniumbromide，OP一10，heptahydratelanthanumchlorideandheptahydrateceriumchloridearese

7、lectedoutTheinfluenceoftheabovesevenadditivesonbrightness，surfacemorphologyhardness，internalstress，corrosionresistanceofnickeldepositandthecathodiccurrentefficiencythrowingpowercathodicpolarizationbehaviorelectrochemical

8、reactionimpedanceofelectrolyteduringnickelelectrodepositionfromsulfateelectrolyteisstudiedThemicrostructureofnickeldepositischaracterizedbyX—raydiffraction(XRD)testTheresultsshowthattheadditionofsaccharinand1，4一butynedio

9、lcanrefinethegrainsizeofnickeldepositandimprovethebrightnessofnickeldeposittosemi—brightandbrightrespectivelyAstheincreaseofsaccharinconcentrationthetensilestressofnickeldepositiSdecreasedandeventuallyturnstocompressives