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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

galvanic corrosion

An electrochemical action which takes place when dissimilar metals are in contact in the presence of an electrolyte, resulting in corrosion.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Galvanic corrosion is one of the major problems to the use of zinc materials in the industry.
Researchers [22, 23] discovered that the corrosion resistance of steels comprising various ferrite fractions was primarily determined by the galvanic corrosion resistance between the constituents of the ferrite phase and of other phases.
Galvanic corrosion measurement (GalCorr): rivet- AM60B matrix
The issue of galvanic corrosion is not limited to aluminum and can occur with other metals and alloys, such as steel or stainless steel, in certain environmental conditions.
Similarly a difference inelectric potential between two or more dental metals incontact with each other in the corrosive oral environmentcan cause galvanic corrosion to occur.7
Underground corrosion of ferrous metals occurs through electrolytic and galvanic corrosion. For more information on causes refer to "Causes of Underground Corrosion" Technical Paper 82." (2) Most of the underground exterior-piping corrosion failures witnessed by the author have originated at piping joints due to lack of corrosion protection or poor workmanship and inspection during installation.
The corrosion is a result of galvanic corrosion which is an electrochemical process in which basically a metal corrodes in presence of electrical current (in the watch itself) and an electrolyte (sweat).
Besides the processing benefits, the polymer delivers a good balance between strength and ductility, is resistant to galvanic corrosion, and has excellent FST properties.
Finally, Structural Adhesives enable bonding of dissimilar materials without worries of galvanic corrosion or stresses of different coefficients of thermal expansion and contraction.
One thing many boaters don't pay enough attention to is the effects of galvanic corrosion on trailers.
Although petrol does not conduct electricity well, ethanol has an appreciable capability to conduct electricity and therefore can promote galvanic corrosion. These water and corrosion issues are the "fly in the ointment" of eco-fuels.
However, tin (Sn) and lead (Pb) both dissolve in the presence of atmospheric water because of galvanic corrosion [20].