Service-induced ant-nest corrosion in copper heat exchanger tubes: Mechanistic understanding from multiscale structural and compositional analysis
Source abstract
Abstract
Ant-nest corrosion in copper heat exchanger tubes was investigated after two months of service using multiscale characterization techniques. Funnel-shaped pits, branched corrosion tunnels, and oxide-filled cavities confirmed ant-nest corrosion as the predominant failure mode. The corrosion products consisted of both stoichiometric and defective Cu 2 O containing oxygen vacancies and nanoscale cracks that were less protective. P segregation (∼2 nm) along grain boundaries promoted corrosion tunnel propagation, while S species were also detected, contributing to pit initiation. A comprehensive mechanism is proposed, highlighting the synergistic roles of carboxylic acids, S species, oxide-filling stress, and alloying effects in driving ant-nest corrosion evolution.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Hydrogen embrittlement and corrosion behaviors in metals · Copper Interconnects and Reliability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (50)
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