7/21/2019 Corrosion Short Course Plating-On-Plastics

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WebCorr, the Corrosion Clinic 1

Plating

on

Plastics:

Fundamentals

and

Processes

Course

Overview:Comparedwithmetals,plasticsaremuchcheaper,lighterandeasiertomould.

Withthedevelopmentinelectrodepositiontechnology,manymetalscanbeplatedonplastics.

Metalplatedplasticstodayhasfoundmanyapplicationsfromshowerheadstoautoparts.This

course covers the fundamentals and processes of plating on plastics from pretreatment to

differentmethodsofplating.

Contents

1.FundamentalsofPlating

1.1Electroplating:BasicTermsandConcepts

1.1.1PrimeronChemistry

1.1.2RedoxReactions

1.1.3TheElectromotiveForce(EMF)SeriesSeries

1.1.4EquilibriumPotential,OverpotentialandMixedPotential

1.1.5EffectofConcentrationonPotential(NernstEquation)

1.1.6Anode,CathodeandCellPotentials

1.1.7ConductivityofElectrolyte

1.1.8ElectrolysisandFaradaysLaw

1.2Electroplating:

Electrode

Kinetics

1.2.1KineticsofElectrodeposition(Tafel&ButlerVolmerEquation)

1.2.2PolarisationandMassTransport(Diffusion)

1.2.3TheDoubleLayer

1.2.4RateDeterminingStepsinElectrodeReactions

ConcentrationOvervoltage

ChargeTransferOverpotential

CrystallisationOvervoltage

ResistanceOvervoltage

1.3MaterialsThatCanBeElectroplated:

Understandingthe

Atomic

Structure

of

Metals

and

Alloys

1.3.1TheCrystallineNatureofMetals

1.3.2LatticeDefectsinMetals

1.3.3GrainsandGrainBoundaries

1.3.4LatticeDefectsinAlloys

1.3.5EffectofLatticeDefectsontheMechanicalProperty

1.3.6MetalsThatCanBeElectrodeposited

1.4ElectroplatingProcessesandProcessControl

1.4.1OverviewofElectrodeposition

1.4.2EssentialComponentsofaPlatingSystem

1.4.3TheNatureofPlatingProcess

Toa Payoh Central, PO Box 225, Singapore 913108

Tel: (+65) 64916456 Fax: (+65) 64916456

Email: webcorr@corrosionclinic.com

www.corrosionclinic.comRegistration No.: 53087135A

Consulting Training Expert Witness Failure Analysis Design Review Corrosion Test Inspection Coatings Materials Cathodic Protection

WebCorrCORROSION CONSULTING

SERVICES

7/21/2019 Corrosion Short Course Plating-On-Plastics

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____________________________________________________________________________________________

WebCorr, the Corrosion Clinic 2

1.4.4ElectroplatingElectrolytes

1.4.5MassandCurrentRelationship

1.4.6CurrentEfficiency

1.4.7QualityandThrowingPower

1.5ExercisesandCaseStudies

2.History,applicationofmetalplatedplastics,kindsofplastics

2.1Applications

2.2PlateablePlastics

2.2.1ABS

2.2.2PC

2.2.3PP

2.2.4PA

2.2.5PAA

2.2.6Summaryofplatinggradeplastics

2.3History

3.Mechanismofadhesionandpretreatment

3.1Mechanismsofadhesion

3.2Pretreatment

4.Surfacecatalyzation

4.1Startingelectrolessmetaldeposition

4.2

Colloidal

palladium

catalyst

4.3Surfacecatalyzation

4.4Acceleration

5.Electrolessmetaldeposition

5.1Generalconsideration

5.2Principlesofmetaldepositionwithoutexternalcurrentsource

5.3Mechanismofelectrolesscopperdeposition

5.4Mechanismofelectrolessnickeldeposition

5.5Summary

6.Direct

plating

6.1Generalconsideration

6.2Sulphidebasedsystems

6.3Palladiumbasedsystems

6.4Summary

7.Processcompilation

7.1Processcomparison

7.2Application

7.3Futuretrend