Which method can provide electrical shielding by diverting the current?

The correct answer is that nonmetallic barriers can provide electrical shielding by diverting the current. Nonmetallic barriers, often made of materials such as plastics or composites, possess insulating properties that help to prevent the flow of electrical currents. When used in pipelines or structures, these barriers can effectively block or redirect stray electrical currents that could lead to corrosion on metal surfaces.

This method is particularly useful in environments where there is a high risk of corrosion due to electrical interference, such as near cathodic protection systems or other metallic installations. By providing a physical boundary, nonmetallic barriers protect the metal structures from the detrimental effects of electrical discharge, thereby extending their lifespan and maintaining their integrity.

In contrast, resistance bonding typically aims at preventing stray current from affecting pipeline integrity, but it does not provide electrical shielding in the same manner as nonmetallic barriers. Current interrupters primarily serve to cut off electrical flow rather than shield it, and galvanic anodes are used to protect against corrosion through cathodic protection rather than directly diverting current.