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Below is a galvanic reaction chart for dissimilar metals. This chart is designed to assist in broadly assessing the risk of galvanic corrosion associated with a given metal coming into contact with another metal.
Galvanic corrosion (some times called dissimilar metal corrosion) is the process by which the materials in contact with each other oxidizes or corrodes. There are three conditions that must exist for galvanic corrosion to occur.
Galvanic corrosion (also called bimetallic corrosion or dissimilar metal corrosion) is an electrochemical process in which one metal corrodes preferentially when it is in electrical contact with another, in the presence of an electrolyte.
When two different metals are in contact and exposed to a common electrolyte, one of the metals experiences accelerated corrosion while the other is protected. This type of accelerated corrosion between dissimilar metals is referred to as galvanic corrosion.
Below, we give a brief overview of galvanic corrosion and provide a galvanic corrosion chart to help fabricators and machinists avoid using the wrong metal combinations. We also provide other helpful methods for avoiding galvanic corrosion.
Electrolytic Corrosion (Electrolysis) occurs when dissimilar metals are in contact in the presence of an electrolyte, such as water (moisture) containing very small amounts of acid. The dissimilar metals set up a galvanic action which results in the deterioration of one of them.
Table 2-6 of the 13th Edition AISC Steel Construction Manual contains an overview of the reactions of dissimilar metals in contact, and gives guidance about which combinations are the most suitable for structural steel. One method for avoiding corrosion of dissimilar metals is to put the contact surfaces of the dissimilar metals in a dry location
Below is a galvanic reaction chart for dissimilar metals. This chart is designed to assist in broadly assessing the risk of galvanic corrosion associated with a given metal coming into contact with another metal.
dissimilar metal corrosion or contact corrosion. In general, the reactions that occur are similar to those that would occur on a single, uncoupled metal, but the rate of attack is increased, sometimes dramatically.
Galvanic corrosion (also called ' dissimilar metal corrosion' or wrongly 'electrolysis') refers to corrosion damage induced when two dissimilar materials are coupled in a corrosive electrolyte. It occurs when two (or more) dissimilar metals are brought into electrical contact under water.