Luna Environment Assisted Cracking (EAC) Sensor For more information, visit: www.lunaintelligentsystems.com Environment assisted cracking of structural materials, including hydrogen embrittlement and stress corrosion cracking, is a significant technical and safety concern for cathodically protected marine structures and pipelines. There is a current need for a simple monitoring system that can be used in the vicinity of critical components to indicate the cumulative impact of conditions that can lead to environment assisted cracking and premature failure.