MODIF YING THE MATRIX

摘要

William Weaver and Lynn Chikosha, Applied Graphene Materials, UK, evaluate the use of graphene nanoplatelets in coatings for enhanced corrosion protection. Pipelines constitute a major infrastructure investment, frequently carrying materials which in the event of failure can cause significant loss to the owner and have serious potential for environmental damage. To fulfil their role, pipelines often run long distances either underwater or underground. This physical challenge is often further complicated by the crossing of international borders, introducing complex codes and standards of management. Coatings are essential to the protection of pipelines from corrosion and subsequent failure, but are themselves subject to degradation by severe abrasion, hydrothermal ageing and chemical degradation. These coating systems are typically considered to be passive or active. Passive systems prevent corrosion by blocking key elements of water, oxygen and salts from reaching the pipe surface. Cathodic protection (CP) systems are reactive systems designed to protect pipelines in the event of failure.