galvanic corrosion


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galvanic corrosion

[gal′van·ik kə′rō·zhən]
(metallurgy)
Electrochemical corrosion associated with the current in a galvanic cell, caused by dissimilar metals in an electrolyte because of the difference in potential (emf) of the two metals. Also known as contact corrosion.

galvanic corrosion

An electrochemical action which takes place when dissimilar metals are in contact in the presence of an electrolyte, resulting in corrosion.
References in periodicals archive ?
dissimilar materials--materials that might have conflicting coefficients of thermal expansion and the potential for galvanic corrosion.
If the fluid is nonconductive, galvanic corrosion does not occur.
Consulting in the fields of corrosion and corrosion control by inhibitors in sour gas systems, grinding balls, microbiological corrosion, corrosion of low-leaded copper-base alloys, hydrogen damage in high-strength and rail steels, galvanic corrosion of household plumbing solders and contamination of drinking water, surface quantification of corrosion products, electrochemical sensors for hydrogen in steels, reverse osmosis and water pollution and beneficiation of ores.
The mating surfaces of a vehicles' aluminum steering knuckle and original ball joint housing can promote galvanic corrosion, making ball joint replacement very difficult for the technician without the proper tool.
The key advantages of adhesives include the distribution of loads across the entire joint area, excellent fatigue properties, the attenuation of mechanical vibrations and sound, sealant functions, a reduction in galvanic corrosion between dissimilar metals, and a faster more cost-effective assembly method.
An important key property of cadmium coatings is that they provide protection from galvanic corrosion when in contact with aluminium and this can be achieved with zinc-nickel coatings.
It is likely that the hardware would have suffered significant galvanic corrosion due to the presence of landfill leachates and gasses.
Furthermore, all the gutters and downpipes are changed to copper due to galvanic corrosion.
The common corrosion types are mainly galvanic corrosion, pitting corrosion, filiform corrosion and stress corrosion of these.
Computational models simulate the physics of galvanic corrosion and the features of a CP system.
In general, metal enclosures provide the best performance but suffer from issues with galvanic corrosion and oxidation that can reduce their effectiveness.
The Ag3Sn contained in SAC solder joints seems to accelerate tin corrosion because of the galvanic corrosion mechanism.