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Which of the following is/are the preventions of the galvanic effect?

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Which of the following is/are the preventions of the galvanic effect?

(a) Insulating dissimilar metals

(b) Selection of close metal combinations in a galvanic series

(c) Neglecting area effect

(d) Insulating dissimilar metals and selection of close metal combinations in a galvanic series

This question was addressed to me in a national level competition.

The query is from Principles topic in chapter Corrosion Principles of Corrosion Engineering

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Right choice is (d) Insulating dissimilar metals and selection of close metal combinations in a galvanic series

Explanation: The galvanic effect is due to the contact of two dissimilar metals in a conductive solution. It can be minimized by insulating dissimilar metals with non-conductive materials. And it can be reduced by the selection of close metal combinations in a galvanic series.

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