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 ?
The popular diecasting family of alloys--aluminum, magnesium and zinc--are all "active" metals and potentially subject to problems, which is why galvanic corrosion cannot be overlooked.
Frankel, GS, "A Galvanic Corrosion Approach to Investigating Chromate effects on Aluminum Alloy 2024-T3.
Galvanic corrosion occurs where dissimilar metals are lapped over one another, where screws or bolts of one metal are used to fasten sheets of another metal together (see Figure 2) and where parts made of one metal are attached to another metal.
Several clinical cases of galvanic corrosion have been reported in the literature.
A chemical reaction called galvanic corrosion occurs between some dissimilar metals, and copper seems to be a leading culprit.
2] [8] reveal that corrosion resistance of composites are lower than matrix alloys, owing to galvanic corrosion between the reinforcement and matrix alloy.
Made of high-grade PVC, Certa-Lok Well Casing is immune to electrolytic and galvanic corrosion, and will not rust or rot like metal pipe.
This new powder coating line includes nylon 11 coating, which also prevents galvanic corrosion between dissimilar materials.
Due to the galvanic corrosion properties of zinc and stainless steel, the staff placed Teflon pieces between any spots where the two materials would come into contact, particularly at the bolt holes that connected the two segments of the statue.
Appropriate material selection to avoid galvanic corrosion.
In addition it is hydrolysis resistant and can be used in environments where hot water leads to either seal attack or galvanic corrosion of the metalwork.
Today, Magnaplate-applied coatings are used not only in space, but for such down-to-earth applications as the prevention of abrasion, erosion and galvanic corrosion of plastic molds; the protection of the huge boring machines used in digging the England/France "Chunnel" from salt water corrosion; the permanent lubricating and hardening of high-speed machinery's aluminum guide surfaces; the solder-spatter-rejection on double wall copper tubing machines; and a host of other applications.