Biofuels, such as ethanol, butanol, and biodiesel, are being pursued aggressively because they offset some of CO2 emitted as well as reduce dependence on fossil oil. A significant growth in biofuels will depend on pipelines for safe, reliable and cost-effective transportation solutions. The materials compatibility issues with the transportation and storage of biofuels include, for example, stress corrosion cracking of steel in ethanol and the compatibility of ethanol and biodiesel with polymers used in seals, gaskets and coatings. DNV Research is actively involved in developing methods to improve materials compatibility, guidelines on safe operations, and techniques to remotely monitor corrosion/cracking of steel.