Two types of dezincification
usually take place and one can easily recognize both of them: One is uniform, other whole surface creating a layer and the other is localizer or plug-type .
The kinetics of dissolution and dezincification mechanism of brass in hydrochloric acid solution was investigated using electrochemical studies.
Dezincification factor (Z) = (Zn/Cu) Solution/(Zn/CU) Alloy (13)
It can be explained by the low percentage of cobalt added to brass alloy that leads to a much slower dezincification
than in normal brass, i.e., slower corrosion of the coating in hot and humid conditions and slower degradation of the adhesion interface.
Troiani, "Surface phase transformation induced by the dezincification
of a beta Cu-Zn alloy on highly deformed systems," Applied Surface Science, vol.
The problem of dezincification
of brass water fittings was first identified in the 1950s.
The high copper content contributes to improved resistance against stress corrosion cracking and dezincification
This alloy has a higher corrosion resistance than the base alloy, possesses satisfactory solderability and platability, and its graphite particles don't significantly affect dezincification
Rajendran, Effect of Benzotriazole Derivatives on the Corrosion and Dezincification
of Brass in Neutral Chloride Solution', J.
Moisture may also cause the loss of zinc (dezincification
) from the surface or the brass plated steel cord.
34) who reported that at high levels of cobalt the presence of moisture caused metallic cobalt to form, accelerating dezincification
and destroying the integrity of the interfacial film.
Thus, the resin system protects the steel cord from attack by moisture and oxygen, reduces dezincification
, stabilizes the [Cu.sub.(.sub.2.sub.-.sub.x.sub.)]S interfacial linkage, and imparts both original and humidity-aged adhesion.