Testing For Corrosion Without Making It Worse
Accurate testing for corroded metals in such critical structures as airplanes or nuclear-power plants is essential. Conventional instruments used for these noninvasive tests typically run a current through structures, then measure how the metal conducts it. The system works because corroded metal conducts at a different rate. Sometimes, however, the current used in the test can stimulate more corrosion, says Quantum Magnetics Inc. physicist Ronald E. Sager.
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