Corrosion of metals at the joints is minimized by joining dissimilar

corrosion-of-metals-at-the-joints-is-minimized-by-joining-dissimilar

Corrosion of metals at the joints is minimized by joining dissimilar metals with adhesives because ____________

A. Direct metal to metal contact is avoided

B. Adhesive act as a lubricator at the joints

C. Metals are covered with adhesives

D. Adhesives prevent the exposure to environment

I had been asked this question in semester exam.

This interesting question is from Adhesives, their Advantages and Limitations in portion Polymers of Engineering Chemistry I

Right option is A. Direct metal to metal contact is avoided

Easiest explanation: Corrosion of metals at the joints is minimized by joining dissimilar metals with adhesives because direct metal to metal contact is avoided so galvanic action is reduced.