Cadmium Substitution - garteur
Cadmium Substitution - garteur
Cadmium Substitution - garteur
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GARTEUR LIMITED<br />
Coating Passivated Mean Ig<br />
(µA.cm- 2 )<br />
R a<br />
(mdd)<br />
R g<br />
(mdd)<br />
ED cadmium no 4.2 10.0 4.1<br />
yes 4.8 6.7 0.8<br />
ED zinc-nickel no 4.7 4.2 -1.7<br />
yes 9.2 1.2 -4.7<br />
ED zinc-cobalt-iron no 4.5 19.9 14.0<br />
yes 6.4 14.3 8.4<br />
PVD aluminium no 9.7 12.2 6.3<br />
yes 8.5 6.5 0.6<br />
ED aluminium no 9.5 9.1 3.2<br />
yes 9.1 4.4 -1.5<br />
UMS aluminium -<br />
magnesium<br />
no 6.1 14.2 8.3<br />
yes 4.9 9.9 4.0<br />
SermeTel 984 4.0 11.7 5.8<br />
984/985 4.7 6.7 0.8<br />
Delta-tone 9.6 16.5 10.6<br />
Table D3; Average galvanic current densities, R a and R g parameters for galvanic<br />
couples for 2014-T6 aluminium alloy in contact with metal coatings<br />
Coating Passivated Mean Ig<br />
(µA.cm- 2 )<br />
R a<br />
(mdd)<br />
R g<br />
(mdd)<br />
ED cadmium no 4.4 7.1 2.9<br />
yes 4.2 6.2 2.0<br />
ED zinc-nickel no 5.0 3.3 -0.9<br />
yes 9.0 2.2 -2.0<br />
ED zinc-cobalt-iron no 5.1 14.4 10.2<br />
yes 7.6 10.6 6.4<br />
PVD aluminium no 8.6 12.0 7.8<br />
yes 7.0 10.4 6.2<br />
ED aluminium no 7.4 6.2 2.0<br />
yes 8.0 3.2 -1.0<br />
UMS aluminium -<br />
magnesium<br />
no 4.9 12.9 8.7<br />
yes 5.3 8.1 3.9<br />
SermeTel 984 4.1 9.3 5.1<br />
984/985 4.6 8.7 4.5<br />
Delta-tone 5.7 13.2 9.0<br />
Table D4; Average galvanic current densities, R a and R g parameters for galvanic<br />
couples for 7075-T6 aluminium alloy in contact with metal coatings<br />
GARTEUR SM/AG17 TP128 Page 75
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