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(xué)碩士學(xué)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(xué)位級別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)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