Demonstration of lithographic patterning in measurements of general and localized corrosion on alloy 22

摘要

We have demonstrated a new technique capable of detecting generalized corrosion of metallographically-polished materials with nanometer-scale precision. After exposing a lithographically-patterned coupon of Alloy 22 to an electrolyte in a potentiostatically-controlled cell for twenty-four hours, we detected the loss of up to 130nm of metal. In addition, 'wormholes' were detected at certain points of intersection of three grain boundaries.