Question

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

(a) Avoid the unfavorable area effect of a small anode and large cathode

(b) Select the close combination of metals in galvanic series

(c) Select the far combination of metals in galvanic series

(d) Avoid the unfavorable area effect of a small anode and large cathode and select the close combination of metals in galvanic series

The question was posed to me by my college professor while I was bunking the class.

Enquiry is from Eight Forms in section Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct choice is (d) Avoid the unfavorable area effect of a small anode and large cathode and select the close combination of metals in galvanic series

Easiest explanation: In industrial applications avoiding a dissimilar metal combination is impossible. But it can be minimized by avoiding the unfavorable area effect, selecting the close combination of metals. Proper material selection and regular inspection are other preventive measures.