Galvanic corrosion Crevice corrosionIntergranular corrosionStress CorrosionPitting corrosionErosion corrosionBeer corrosion

Neglect corrosion

Dissimilar metals

Manufacturing issues

Alloy issues

Mechanical designGasket interfaces

Liquidity issues

Poor husbandry

Cellars and floors

Con

duct

ive

gask

etE

nvironment

Metallic interface

Oriented wires Silver GlassNickel graphite

Silver Aluminium

Silver Aluminium

Fluorosilicone

Silver Aluminium

Fluorosilicone

Material Type

200 MHz (60 dB min)

1 GHz (60 dB min)

10 GHz (60 dB min)

AAg/Cu

8567

8352

10439

BAg/Al

8786

6961

7360

CNi

8567

8252

10062

DNi

8867

8254

8464

ENi/Graphite

9372

7352

7168

FAg/Al

7872

6465

6377

GNi/Graphite

8273

7448

7658

HAg/Al

8475

6858

7169

INi

8573

6864

7275

JAl/W

8164

6248

6766

KNi/Graphite

8369

8855

10051

LAg/Al

8068

6663

6274

MAl/W

8372

6053

6556

NAg/Al

7573

6459

6556

Material Type

Salt Fog168 hours

Salt Fog500 hours

Vol Res15 mohm max

AAg/Cu

254.25 mg 1079 mg 0.72.51

BAg/Al

2.55 mg 12.6 mg 5.69.55

CNi

6.35 mg 21.5 mg 197.5350.08

DNi

6.55 mg 23.3 mg 870.720108.22

ENi/Graphite

17.25 mg 42.7 mg 156.4367.52

FAg/Al

9.70 mg 21.7 mg 0.902.54

GNi/Graphite

8.90 mg 26.4 mg 803.1944.36

HAg/Al

6.80 mg 14.5 mg 1.65.38

INi

0.35 mg 2.4 mg 608,273756,169

JAl/W

0.70 mg 3.8 mg 78759open

KNi/Graphite

13.75 mg 35.1 mg 77.3174.39

LAg/Al

2.70 mg 5.3 mg 11.518.34

MAl/W

0.80 2.6 mg 3,8831,106,973

NAg/Al

14.40 mg 18.8 mg 2.44.88

ChoShield 2001-2003ChoShield 2001-2003

Mil-DTL-5541 Class IIIMil-DTL-5541 Class III

A/C PrimerA/C Primer

ChoBond Primer 1091ChoBond Primer 1091

ChoBond 1038ChoBond 1038

ChoSeal 1298 ChoSeal 1298 GasketGasket

Un-plated steel or aluminium

Text

Cho-Mask II

Cho-Mask Silver Epoxy paint

Zinc plating w/yellow chromate

Nickel Acrylic paint

Copper Foil

H2O

H2O

H2O

H2O

H2O

HITEK Electronic Materials Ltd15 Wentworth Road, Scunthorpe, North Lincs, DN17 2AX Tel +44 (0) 1724 851678 E Mail sales@hitek-ltd.co.uk Web www.hitek-ltd.co.uk